./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f6eaec015dd6fdb220ef146938a83a65106037c982563310cbbb34d0417543f1 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:21:04,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:21:04,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:21:04,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:21:04,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:21:04,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:21:04,283 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:21:04,286 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:21:04,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:21:04,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:21:04,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:21:04,292 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:21:04,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:21:04,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:21:04,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:21:04,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:21:04,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:21:04,300 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:21:04,302 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:21:04,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:21:04,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:21:04,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:21:04,309 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:21:04,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:21:04,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:21:04,315 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:21:04,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:21:04,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:21:04,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:21:04,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:21:04,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:21:04,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:21:04,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:21:04,322 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:21:04,323 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:21:04,324 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:21:04,324 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:21:04,324 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:21:04,325 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:21:04,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:21:04,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:21:04,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:21:04,372 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:21:04,374 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:21:04,375 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:21:04,375 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:21:04,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:21:04,383 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:21:04,384 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:21:04,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:21:04,384 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:21:04,384 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:21:04,384 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:21:04,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:21:04,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:21:04,385 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:21:04,385 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:21:04,385 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:21:04,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:21:04,386 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:21:04,386 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:21:04,386 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:21:04,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:21:04,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:21:04,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:21:04,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:21:04,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:21:04,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:21:04,388 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:21:04,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:21:04,388 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:21:04,388 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_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6eaec015dd6fdb220ef146938a83a65106037c982563310cbbb34d0417543f1 [2021-10-21 19:21:04,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:21:04,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:21:04,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:21:04,696 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:21:04,698 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:21:04,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i [2021-10-21 19:21:04,764 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/data/cfca3fbb2/d39bf9ccccae4dd3998cd103eaca8744/FLAG93c789842 [2021-10-21 19:21:05,273 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:21:05,274 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-1.i [2021-10-21 19:21:05,288 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/data/cfca3fbb2/d39bf9ccccae4dd3998cd103eaca8744/FLAG93c789842 [2021-10-21 19:21:05,578 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/data/cfca3fbb2/d39bf9ccccae4dd3998cd103eaca8744 [2021-10-21 19:21:05,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:21:05,589 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:21:05,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:21:05,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:21:05,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:21:05,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:21:05" (1/1) ... [2021-10-21 19:21:05,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23ee2310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:21:05, skipping insertion in model container [2021-10-21 19:21:05,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:21:05" (1/1) ... [2021-10-21 19:21:05,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:21:05,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:21:06,063 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:21:06,072 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:21:06,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:21:06,176 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:21:06,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:21:06 WrapperNode [2021-10-21 19:21:06,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:21:06,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:21:06,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:21:06,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:21:06,189 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:21:06" (1/1) ... [2021-10-21 19:21:06,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:21:06" (1/1) ... [2021-10-21 19:21:06,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:21:06" (1/1) ... [2021-10-21 19:21:06,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:21:06" (1/1) ... [2021-10-21 19:21:06,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:21:06" (1/1) ... [2021-10-21 19:21:06,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:21:06" (1/1) ... [2021-10-21 19:21:06,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:21:06" (1/1) ... [2021-10-21 19:21:06,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:21:06,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:21:06,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:21:06,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:21:06,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:21:06" (1/1) ... [2021-10-21 19:21:06,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:21:06,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:21:06,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:21:06,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:21:06,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:21:06,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:21:06,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:21:06,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:21:06,328 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-21 19:21:06,328 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2021-10-21 19:21:06,328 INFO L138 BoogieDeclarations]: Found implementation of procedure _destroy_in_nondeterministic_order [2021-10-21 19:21:06,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:21:06,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:21:06,329 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:21:06,329 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:21:06,329 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:21:06,329 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:21:06,329 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:21:06,329 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:21:06,330 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:21:06,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:21:06,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:21:06,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:21:06,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:21:06,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:21:06,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:21:06,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:21:06,330 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:21:06,331 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:21:06,331 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:21:06,331 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:21:06,331 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:21:06,331 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:21:06,331 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:21:06,331 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:21:06,331 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:21:06,332 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:21:06,332 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:21:06,332 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:21:06,332 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:21:06,332 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:21:06,332 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:21:06,332 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:21:06,332 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:21:06,332 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:21:06,332 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:21:06,333 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:21:06,333 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:21:06,333 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:21:06,333 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:21:06,333 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:21:06,333 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:21:06,333 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:21:06,333 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:21:06,334 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:21:06,334 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:21:06,334 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:21:06,334 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:21:06,334 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:21:06,334 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:21:06,334 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:21:06,334 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:21:06,335 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:21:06,335 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:21:06,335 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:21:06,335 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:21:06,335 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:21:06,335 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:21:06,335 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:21:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-21 19:21:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:21:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:21:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:21:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:21:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:21:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:21:06,336 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:21:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:21:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:21:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:21:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:21:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:21:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:21:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:21:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:21:06,337 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:21:06,338 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:21:06,338 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:21:06,338 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:21:06,338 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:21:06,338 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:21:06,338 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:21:06,338 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:21:06,338 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:21:06,339 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:21:06,339 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:21:06,339 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:21:06,339 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:21:06,339 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:21:06,339 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:21:06,339 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:21:06,340 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:21:06,340 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:21:06,340 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:21:06,340 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:21:06,340 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:21:06,340 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:21:06,340 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:21:06,340 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:21:06,341 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:21:06,341 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:21:06,341 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:21:06,341 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:21:06,341 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:21:06,341 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:21:06,341 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:21:06,342 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:21:06,342 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:21:06,342 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-21 19:21:06,342 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2021-10-21 19:21:06,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:21:06,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:21:06,342 INFO L130 BoogieDeclarations]: Found specification of procedure _destroy_in_nondeterministic_order [2021-10-21 19:21:06,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:21:06,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:21:06,343 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:21:06,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:21:06,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:21:06,889 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-21 19:21:06,928 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:21:06,931 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-21 19:21:06,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:21:06 BoogieIcfgContainer [2021-10-21 19:21:06,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:21:06,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:21:06,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:21:06,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:21:06,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:21:05" (1/3) ... [2021-10-21 19:21:06,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c990b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:21:06, skipping insertion in model container [2021-10-21 19:21:06,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:21:06" (2/3) ... [2021-10-21 19:21:06,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56c990b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:21:06, skipping insertion in model container [2021-10-21 19:21:06,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:21:06" (3/3) ... [2021-10-21 19:21:06,951 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nondet_free_order-1.i [2021-10-21 19:21:06,962 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:21:06,967 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2021-10-21 19:21:07,067 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:21:07,073 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:21:07,073 INFO L340 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2021-10-21 19:21:07,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 152 states, 79 states have (on average 1.8987341772151898) internal successors, (150), 142 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-21 19:21:07,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:21:07,097 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:07,098 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:21:07,098 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting dll_circular_createErr0REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:07,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:07,104 INFO L82 PathProgramCache]: Analyzing trace with hash -23350716, now seen corresponding path program 1 times [2021-10-21 19:21:07,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:07,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750664830] [2021-10-21 19:21:07,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:07,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:07,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:07,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:07,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750664830] [2021-10-21 19:21:07,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750664830] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:21:07,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:21:07,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:21:07,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616946129] [2021-10-21 19:21:07,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:21:07,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:07,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:21:07,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:21:07,389 INFO L87 Difference]: Start difference. First operand has 152 states, 79 states have (on average 1.8987341772151898) internal successors, (150), 142 states have internal predecessors, (150), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:07,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:07,675 INFO L93 Difference]: Finished difference Result 149 states and 156 transitions. [2021-10-21 19:21:07,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:21:07,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-21 19:21:07,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:07,685 INFO L225 Difference]: With dead ends: 149 [2021-10-21 19:21:07,686 INFO L226 Difference]: Without dead ends: 142 [2021-10-21 19:21:07,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:21:07,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-21 19:21:07,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-10-21 19:21:07,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 76 states have (on average 1.8421052631578947) internal successors, (140), 134 states have internal predecessors, (140), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:07,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 147 transitions. [2021-10-21 19:21:07,729 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 147 transitions. Word has length 10 [2021-10-21 19:21:07,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:07,729 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 147 transitions. [2021-10-21 19:21:07,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:07,730 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 147 transitions. [2021-10-21 19:21:07,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:21:07,730 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:07,731 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:21:07,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:21:07,731 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting dll_circular_createErr1REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:07,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:07,732 INFO L82 PathProgramCache]: Analyzing trace with hash -23350715, now seen corresponding path program 1 times [2021-10-21 19:21:07,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:07,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692137033] [2021-10-21 19:21:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:07,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:07,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:07,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:07,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:07,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692137033] [2021-10-21 19:21:07,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692137033] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:21:07,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:21:07,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:21:07,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55378069] [2021-10-21 19:21:07,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:21:07,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:07,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:21:07,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:21:07,806 INFO L87 Difference]: Start difference. First operand 142 states and 147 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:08,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:08,028 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-10-21 19:21:08,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:21:08,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-10-21 19:21:08,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:08,030 INFO L225 Difference]: With dead ends: 139 [2021-10-21 19:21:08,030 INFO L226 Difference]: Without dead ends: 139 [2021-10-21 19:21:08,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:21:08,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-21 19:21:08,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-10-21 19:21:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 76 states have (on average 1.8026315789473684) internal successors, (137), 131 states have internal predecessors, (137), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:08,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-10-21 19:21:08,043 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 10 [2021-10-21 19:21:08,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:08,043 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-10-21 19:21:08,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-10-21 19:21:08,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:21:08,044 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:08,045 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:21:08,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:21:08,045 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dll_circular_createErr10REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:08,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:08,046 INFO L82 PathProgramCache]: Analyzing trace with hash 589419475, now seen corresponding path program 1 times [2021-10-21 19:21:08,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:08,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684917993] [2021-10-21 19:21:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:08,047 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:08,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:08,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:08,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:08,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684917993] [2021-10-21 19:21:08,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684917993] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:21:08,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:21:08,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:21:08,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684369236] [2021-10-21 19:21:08,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:21:08,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:08,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:21:08,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:21:08,141 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:08,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:08,427 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2021-10-21 19:21:08,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:21:08,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 15 [2021-10-21 19:21:08,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:08,430 INFO L225 Difference]: With dead ends: 149 [2021-10-21 19:21:08,430 INFO L226 Difference]: Without dead ends: 149 [2021-10-21 19:21:08,430 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:21:08,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-10-21 19:21:08,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 145. [2021-10-21 19:21:08,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 82 states have (on average 1.8048780487804879) internal successors, (148), 137 states have internal predecessors, (148), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:08,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 155 transitions. [2021-10-21 19:21:08,446 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 155 transitions. Word has length 15 [2021-10-21 19:21:08,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:08,446 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 155 transitions. [2021-10-21 19:21:08,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:08,447 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 155 transitions. [2021-10-21 19:21:08,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:21:08,447 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:08,447 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:21:08,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:21:08,448 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_circular_createErr11REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:08,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:08,449 INFO L82 PathProgramCache]: Analyzing trace with hash 589419476, now seen corresponding path program 1 times [2021-10-21 19:21:08,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:08,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633979662] [2021-10-21 19:21:08,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:08,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:08,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:08,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:08,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633979662] [2021-10-21 19:21:08,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633979662] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:21:08,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:21:08,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:21:08,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220317668] [2021-10-21 19:21:08,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:21:08,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:08,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:21:08,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:21:08,539 INFO L87 Difference]: Start difference. First operand 145 states and 155 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:08,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:08,789 INFO L93 Difference]: Finished difference Result 147 states and 152 transitions. [2021-10-21 19:21:08,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:21:08,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-21 19:21:08,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:08,792 INFO L225 Difference]: With dead ends: 147 [2021-10-21 19:21:08,792 INFO L226 Difference]: Without dead ends: 147 [2021-10-21 19:21:08,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:21:08,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-21 19:21:08,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 143. [2021-10-21 19:21:08,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 80 states have (on average 1.8) internal successors, (144), 135 states have internal predecessors, (144), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:08,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 151 transitions. [2021-10-21 19:21:08,817 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 151 transitions. Word has length 15 [2021-10-21 19:21:08,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:08,817 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 151 transitions. [2021-10-21 19:21:08,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:08,817 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 151 transitions. [2021-10-21 19:21:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:21:08,818 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:08,818 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:21:08,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:21:08,818 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dll_circular_createErr4REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:08,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:08,819 INFO L82 PathProgramCache]: Analyzing trace with hash 589421012, now seen corresponding path program 1 times [2021-10-21 19:21:08,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:08,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447667069] [2021-10-21 19:21:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:08,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:08,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:08,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:08,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:08,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447667069] [2021-10-21 19:21:08,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447667069] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:21:08,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:21:08,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:21:08,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232958147] [2021-10-21 19:21:08,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:21:08,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:08,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:21:08,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:21:08,922 INFO L87 Difference]: Start difference. First operand 143 states and 151 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:09,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:09,095 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2021-10-21 19:21:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:21:09,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 15 [2021-10-21 19:21:09,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:09,097 INFO L225 Difference]: With dead ends: 142 [2021-10-21 19:21:09,097 INFO L226 Difference]: Without dead ends: 142 [2021-10-21 19:21:09,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:21:09,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-21 19:21:09,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-10-21 19:21:09,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 80 states have (on average 1.775) internal successors, (142), 134 states have internal predecessors, (142), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:09,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2021-10-21 19:21:09,103 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 15 [2021-10-21 19:21:09,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:09,103 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2021-10-21 19:21:09,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:09,104 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2021-10-21 19:21:09,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:21:09,104 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:09,104 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:21:09,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:21:09,105 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_circular_createErr5REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:09,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:09,105 INFO L82 PathProgramCache]: Analyzing trace with hash 589421013, now seen corresponding path program 1 times [2021-10-21 19:21:09,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:09,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668501543] [2021-10-21 19:21:09,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:09,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:09,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:09,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:09,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668501543] [2021-10-21 19:21:09,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668501543] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:21:09,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:21:09,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:21:09,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851627269] [2021-10-21 19:21:09,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:21:09,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:09,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:21:09,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:21:09,167 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:09,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:09,348 INFO L93 Difference]: Finished difference Result 141 states and 147 transitions. [2021-10-21 19:21:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:21:09,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 15 [2021-10-21 19:21:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:09,349 INFO L225 Difference]: With dead ends: 141 [2021-10-21 19:21:09,349 INFO L226 Difference]: Without dead ends: 141 [2021-10-21 19:21:09,350 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:21:09,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-21 19:21:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-10-21 19:21:09,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 80 states have (on average 1.75) internal successors, (140), 133 states have internal predecessors, (140), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:09,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 147 transitions. [2021-10-21 19:21:09,355 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 147 transitions. Word has length 15 [2021-10-21 19:21:09,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:09,355 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 147 transitions. [2021-10-21 19:21:09,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:09,355 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 147 transitions. [2021-10-21 19:21:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 19:21:09,356 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:09,356 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:21:09,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:21:09,356 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_circular_createErr7REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:09,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:09,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1092182321, now seen corresponding path program 1 times [2021-10-21 19:21:09,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:09,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174969428] [2021-10-21 19:21:09,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:09,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:09,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:09,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:09,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:09,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174969428] [2021-10-21 19:21:09,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174969428] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:21:09,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:21:09,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:21:09,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262214582] [2021-10-21 19:21:09,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:21:09,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:09,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:21:09,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:21:09,436 INFO L87 Difference]: Start difference. First operand 141 states and 147 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:09,640 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2021-10-21 19:21:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:21:09,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (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 16 [2021-10-21 19:21:09,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:09,642 INFO L225 Difference]: With dead ends: 142 [2021-10-21 19:21:09,642 INFO L226 Difference]: Without dead ends: 142 [2021-10-21 19:21:09,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:21:09,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-21 19:21:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-10-21 19:21:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 80 states have (on average 1.7375) internal successors, (139), 133 states have internal predecessors, (139), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2021-10-21 19:21:09,647 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 16 [2021-10-21 19:21:09,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:09,648 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2021-10-21 19:21:09,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2021-10-21 19:21:09,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:21:09,649 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:09,649 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:21:09,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:21:09,651 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_circular_createErr10REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:09,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:09,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1717860195, now seen corresponding path program 1 times [2021-10-21 19:21:09,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:09,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799227465] [2021-10-21 19:21:09,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:09,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:09,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:09,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:09,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:09,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799227465] [2021-10-21 19:21:09,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799227465] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:21:09,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:21:09,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:21:09,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830336825] [2021-10-21 19:21:09,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:21:09,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:09,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:21:09,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:21:09,744 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:09,958 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-10-21 19:21:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:21:09,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 20 [2021-10-21 19:21:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:09,960 INFO L225 Difference]: With dead ends: 139 [2021-10-21 19:21:09,960 INFO L226 Difference]: Without dead ends: 139 [2021-10-21 19:21:09,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:21:09,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-21 19:21:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-10-21 19:21:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 80 states have (on average 1.7125) internal successors, (137), 131 states have internal predecessors, (137), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-10-21 19:21:09,965 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 20 [2021-10-21 19:21:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:09,966 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-10-21 19:21:09,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:09,966 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-10-21 19:21:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:21:09,967 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:09,967 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:21:09,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-21 19:21:09,967 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_circular_createErr11REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:09,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:09,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1717860196, now seen corresponding path program 1 times [2021-10-21 19:21:09,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:09,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209388346] [2021-10-21 19:21:09,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:09,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:10,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:10,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:10,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:10,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:10,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209388346] [2021-10-21 19:21:10,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209388346] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:10,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630670634] [2021-10-21 19:21:10,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:10,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:21:10,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:21:10,066 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:21:10,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:21:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:10,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:21:10,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:21:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:10,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630670634] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:10,284 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:21:10,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-10-21 19:21:10,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716638668] [2021-10-21 19:21:10,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:21:10,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:10,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:21:10,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:21:10,285 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:10,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:10,536 INFO L93 Difference]: Finished difference Result 141 states and 146 transitions. [2021-10-21 19:21:10,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:21:10,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-21 19:21:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:10,538 INFO L225 Difference]: With dead ends: 141 [2021-10-21 19:21:10,539 INFO L226 Difference]: Without dead ends: 141 [2021-10-21 19:21:10,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:21:10,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-21 19:21:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-10-21 19:21:10,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 82 states have (on average 1.6951219512195121) internal successors, (139), 133 states have internal predecessors, (139), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:10,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2021-10-21 19:21:10,544 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 20 [2021-10-21 19:21:10,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:10,546 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2021-10-21 19:21:10,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:10,546 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2021-10-21 19:21:10,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:21:10,547 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:10,547 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:21:10,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:21:10,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:21:10,762 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_circular_createErr7REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:10,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1714106273, now seen corresponding path program 1 times [2021-10-21 19:21:10,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:10,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059931778] [2021-10-21 19:21:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:10,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:10,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:10,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:10,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059931778] [2021-10-21 19:21:10,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059931778] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:10,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143620108] [2021-10-21 19:21:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:10,859 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:21:10,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:21:10,865 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:21:10,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:21:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:11,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:21:11,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:21:11,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:21:11,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:21:11,248 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:21:11,248 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 22 treesize of output 24 [2021-10-21 19:21:11,259 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:21:11,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-21 19:21:11,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:11,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143620108] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:11,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:21:11,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-21 19:21:11,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428073093] [2021-10-21 19:21:11,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:21:11,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:11,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:21:11,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:21:11,374 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:11,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:11,659 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2021-10-21 19:21:11,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:21:11,659 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 19:21:11,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:11,661 INFO L225 Difference]: With dead ends: 139 [2021-10-21 19:21:11,661 INFO L226 Difference]: Without dead ends: 139 [2021-10-21 19:21:11,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:21:11,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-10-21 19:21:11,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2021-10-21 19:21:11,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 82 states have (on average 1.670731707317073) internal successors, (137), 131 states have internal predecessors, (137), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:11,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 144 transitions. [2021-10-21 19:21:11,666 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 144 transitions. Word has length 21 [2021-10-21 19:21:11,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:11,666 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 144 transitions. [2021-10-21 19:21:11,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:21:11,667 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 144 transitions. [2021-10-21 19:21:11,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:21:11,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:11,668 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:21:11,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:21:11,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:21:11,879 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting _destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:11,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:11,879 INFO L82 PathProgramCache]: Analyzing trace with hash 964765578, now seen corresponding path program 1 times [2021-10-21 19:21:11,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:11,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909097500] [2021-10-21 19:21:11,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:11,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:11,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:11,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:21:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 19:21:12,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:12,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909097500] [2021-10-21 19:21:12,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909097500] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:21:12,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:21:12,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 19:21:12,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974967017] [2021-10-21 19:21:12,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:21:12,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:12,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:21:12,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:21:12,046 INFO L87 Difference]: Start difference. First operand 139 states and 144 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:21:12,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:12,559 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2021-10-21 19:21:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:21:12,560 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-10-21 19:21:12,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:12,561 INFO L225 Difference]: With dead ends: 136 [2021-10-21 19:21:12,561 INFO L226 Difference]: Without dead ends: 136 [2021-10-21 19:21:12,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:21:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-21 19:21:12,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-10-21 19:21:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 82 states have (on average 1.6341463414634145) internal successors, (134), 128 states have internal predecessors, (134), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:12,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 141 transitions. [2021-10-21 19:21:12,565 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 141 transitions. Word has length 32 [2021-10-21 19:21:12,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:12,566 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 141 transitions. [2021-10-21 19:21:12,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:21:12,566 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 141 transitions. [2021-10-21 19:21:12,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-21 19:21:12,571 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:12,572 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:21:12,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:21:12,572 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:12,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:12,572 INFO L82 PathProgramCache]: Analyzing trace with hash 964765579, now seen corresponding path program 1 times [2021-10-21 19:21:12,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:12,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042058562] [2021-10-21 19:21:12,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:12,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:12,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:12,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:12,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:21:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:21:12,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:12,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042058562] [2021-10-21 19:21:12,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042058562] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:21:12,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:21:12,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 19:21:12,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731089607] [2021-10-21 19:21:12,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:21:12,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:12,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:21:12,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:21:12,817 INFO L87 Difference]: Start difference. First operand 136 states and 141 transitions. Second operand has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:21:13,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:13,350 INFO L93 Difference]: Finished difference Result 129 states and 134 transitions. [2021-10-21 19:21:13,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:21:13,351 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-10-21 19:21:13,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:13,352 INFO L225 Difference]: With dead ends: 129 [2021-10-21 19:21:13,352 INFO L226 Difference]: Without dead ends: 129 [2021-10-21 19:21:13,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 199.9ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:21:13,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-21 19:21:13,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-10-21 19:21:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 82 states have (on average 1.548780487804878) internal successors, (127), 121 states have internal predecessors, (127), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:13,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 134 transitions. [2021-10-21 19:21:13,356 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 134 transitions. Word has length 32 [2021-10-21 19:21:13,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:13,356 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 134 transitions. [2021-10-21 19:21:13,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.888888888888889) internal successors, (26), 7 states have internal predecessors, (26), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:21:13,357 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 134 transitions. [2021-10-21 19:21:13,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 19:21:13,357 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:13,358 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:21:13,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-21 19:21:13,358 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting _destroy_in_nondeterministic_orderErr19ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:13,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:13,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1105471948, now seen corresponding path program 1 times [2021-10-21 19:21:13,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:13,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551968304] [2021-10-21 19:21:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:13,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:13,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:13,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:21:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:13,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:13,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:13,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551968304] [2021-10-21 19:21:13,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551968304] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:13,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921933920] [2021-10-21 19:21:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:13,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:21:13,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:21:13,845 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:21:13,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:21:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:13,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-21 19:21:13,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:21:14,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:21:14,095 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:21:14,095 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 [2021-10-21 19:21:14,270 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-21 19:21:14,271 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 16 treesize of output 18 [2021-10-21 19:21:14,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-21 19:21:14,446 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 23 treesize of output 22 [2021-10-21 19:21:14,681 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-21 19:21:14,682 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 42 [2021-10-21 19:21:14,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:14,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-21 19:21:14,799 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-21 19:21:14,799 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 43 treesize of output 48 [2021-10-21 19:21:15,553 INFO L354 Elim1Store]: treesize reduction 78, result has 3.7 percent of original size [2021-10-21 19:21:15,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 35 [2021-10-21 19:21:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:15,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921933920] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:15,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:21:15,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2021-10-21 19:21:15,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303525507] [2021-10-21 19:21:15,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-21 19:21:15,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:15,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-21 19:21:15,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:21:15,572 INFO L87 Difference]: Start difference. First operand 129 states and 134 transitions. Second operand has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:21:17,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:17,702 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2021-10-21 19:21:17,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:21:17,702 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-10-21 19:21:17,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:17,704 INFO L225 Difference]: With dead ends: 126 [2021-10-21 19:21:17,704 INFO L226 Difference]: Without dead ends: 126 [2021-10-21 19:21:17,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1975.7ms TimeCoverageRelationStatistics Valid=333, Invalid=2423, Unknown=0, NotChecked=0, Total=2756 [2021-10-21 19:21:17,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-21 19:21:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2021-10-21 19:21:17,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 82 states have (on average 1.4878048780487805) internal successors, (122), 116 states have internal predecessors, (122), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2021-10-21 19:21:17,708 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 38 [2021-10-21 19:21:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:17,709 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2021-10-21 19:21:17,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.8125) internal successors, (58), 29 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:21:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2021-10-21 19:21:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 19:21:17,710 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:17,710 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:21:17,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:21:17,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:21:17,928 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting _destroy_in_nondeterministic_orderErr34ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:17,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1105470732, now seen corresponding path program 1 times [2021-10-21 19:21:17,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:17,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476333344] [2021-10-21 19:21:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:17,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:18,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:18,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:21:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:21:18,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:18,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476333344] [2021-10-21 19:21:18,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476333344] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:21:18,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:21:18,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-21 19:21:18,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820660616] [2021-10-21 19:21:18,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:21:18,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:18,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:21:18,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:21:18,288 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:21:18,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:18,946 INFO L93 Difference]: Finished difference Result 119 states and 124 transitions. [2021-10-21 19:21:18,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:21:18,947 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-10-21 19:21:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:18,948 INFO L225 Difference]: With dead ends: 119 [2021-10-21 19:21:18,949 INFO L226 Difference]: Without dead ends: 119 [2021-10-21 19:21:18,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 336.0ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:21:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-21 19:21:18,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-10-21 19:21:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 82 states have (on average 1.4268292682926829) internal successors, (117), 111 states have internal predecessors, (117), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 124 transitions. [2021-10-21 19:21:18,953 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 124 transitions. Word has length 38 [2021-10-21 19:21:18,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:18,953 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 124 transitions. [2021-10-21 19:21:18,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 12 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:21:18,953 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 124 transitions. [2021-10-21 19:21:18,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 19:21:18,954 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:18,954 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:21:18,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 19:21:18,954 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting _destroy_in_nondeterministic_orderErr5ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:18,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:18,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1105509714, now seen corresponding path program 1 times [2021-10-21 19:21:18,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:18,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679882166] [2021-10-21 19:21:18,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:18,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:19,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:19,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:21:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:21:19,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:19,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679882166] [2021-10-21 19:21:19,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679882166] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:21:19,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:21:19,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-21 19:21:19,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386262788] [2021-10-21 19:21:19,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:21:19,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:19,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:21:19,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:21:19,094 INFO L87 Difference]: Start difference. First operand 119 states and 124 transitions. Second operand has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:21:19,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:19,565 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2021-10-21 19:21:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:21:19,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-10-21 19:21:19,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:19,567 INFO L225 Difference]: With dead ends: 114 [2021-10-21 19:21:19,567 INFO L226 Difference]: Without dead ends: 114 [2021-10-21 19:21:19,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:21:19,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-21 19:21:19,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-21 19:21:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 82 states have (on average 1.3658536585365855) internal successors, (112), 106 states have internal predecessors, (112), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2021-10-21 19:21:19,571 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 38 [2021-10-21 19:21:19,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:19,572 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2021-10-21 19:21:19,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:21:19,572 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2021-10-21 19:21:19,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 19:21:19,573 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:19,573 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:21:19,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 19:21:19,573 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting _destroy_in_nondeterministic_orderErr20ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:19,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:19,574 INFO L82 PathProgramCache]: Analyzing trace with hash 90108066, now seen corresponding path program 1 times [2021-10-21 19:21:19,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:19,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103289756] [2021-10-21 19:21:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:19,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:19,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:19,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:21:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:20,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:20,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103289756] [2021-10-21 19:21:20,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103289756] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:20,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662148539] [2021-10-21 19:21:20,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:20,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:21:20,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:21:20,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:21:20,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:21:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:20,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-21 19:21:20,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:21:20,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:21:20,425 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-21 19:21:20,425 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 16 treesize of output 18 [2021-10-21 19:21:20,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-21 19:21:20,544 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:21:20,545 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 39 treesize of output 29 [2021-10-21 19:21:20,726 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-21 19:21:20,727 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 42 treesize of output 39 [2021-10-21 19:21:20,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:20,843 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-21 19:21:20,844 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 55 [2021-10-21 19:21:21,506 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-21 19:21:21,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 29 [2021-10-21 19:21:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:21,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662148539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:21,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:21:21,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 30 [2021-10-21 19:21:21,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852352183] [2021-10-21 19:21:21,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-21 19:21:21,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:21,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-21 19:21:21,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:21:21,528 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand has 31 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:21:23,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:23,497 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-10-21 19:21:23,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 19:21:23,498 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2021-10-21 19:21:23,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:23,499 INFO L225 Difference]: With dead ends: 113 [2021-10-21 19:21:23,499 INFO L226 Difference]: Without dead ends: 113 [2021-10-21 19:21:23,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1736.2ms TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 19:21:23,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-21 19:21:23,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2021-10-21 19:21:23,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 82 states have (on average 1.3048780487804879) internal successors, (107), 101 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:23,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 114 transitions. [2021-10-21 19:21:23,503 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 114 transitions. Word has length 39 [2021-10-21 19:21:23,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:23,503 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 114 transitions. [2021-10-21 19:21:23,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 25 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:21:23,504 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 114 transitions. [2021-10-21 19:21:23,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 19:21:23,504 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:23,504 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:21:23,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:21:23,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:21:23,705 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting _destroy_in_nondeterministic_orderErr35ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:23,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:23,706 INFO L82 PathProgramCache]: Analyzing trace with hash 90145800, now seen corresponding path program 1 times [2021-10-21 19:21:23,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:23,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904571381] [2021-10-21 19:21:23,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:23,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:23,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:23,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:21:23,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:21:24,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:24,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904571381] [2021-10-21 19:21:24,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904571381] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:21:24,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:21:24,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-21 19:21:24,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988327351] [2021-10-21 19:21:24,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:21:24,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:24,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:21:24,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:21:24,003 INFO L87 Difference]: Start difference. First operand 109 states and 114 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:21:24,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:24,822 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-10-21 19:21:24,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:21:24,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 39 [2021-10-21 19:21:24,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:24,824 INFO L225 Difference]: With dead ends: 104 [2021-10-21 19:21:24,824 INFO L226 Difference]: Without dead ends: 104 [2021-10-21 19:21:24,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 341.8ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:21:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-21 19:21:24,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-10-21 19:21:24,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 82 states have (on average 1.2439024390243902) internal successors, (102), 96 states have internal predecessors, (102), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 109 transitions. [2021-10-21 19:21:24,828 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 109 transitions. Word has length 39 [2021-10-21 19:21:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:24,828 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 109 transitions. [2021-10-21 19:21:24,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:21:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 109 transitions. [2021-10-21 19:21:24,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:21:24,829 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:24,829 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:21:24,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 19:21:24,829 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting _destroy_in_nondeterministic_orderErr21ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:24,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:24,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1501617162, now seen corresponding path program 1 times [2021-10-21 19:21:24,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:24,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677970936] [2021-10-21 19:21:24,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:24,830 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:24,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:24,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:21:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:25,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:25,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677970936] [2021-10-21 19:21:25,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677970936] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:25,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413864931] [2021-10-21 19:21:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:25,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:21:25,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:21:25,214 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:21:25,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:21:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:25,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-21 19:21:25,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:21:25,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:21:25,529 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-21 19:21:25,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 22 treesize of output 33 [2021-10-21 19:21:25,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-21 19:21:25,704 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:21:25,705 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 39 treesize of output 29 [2021-10-21 19:21:25,935 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-21 19:21:25,935 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 42 treesize of output 39 [2021-10-21 19:21:26,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:21:26,065 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-21 19:21:26,065 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 60 [2021-10-21 19:21:26,814 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-21 19:21:26,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 39 [2021-10-21 19:21:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:27,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413864931] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:27,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:21:27,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 32 [2021-10-21 19:21:27,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81094303] [2021-10-21 19:21:27,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-21 19:21:27,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:27,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-21 19:21:27,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:21:27,109 INFO L87 Difference]: Start difference. First operand 104 states and 109 transitions. Second operand has 33 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:21:28,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:28,880 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2021-10-21 19:21:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 19:21:28,880 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2021-10-21 19:21:28,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:28,882 INFO L225 Difference]: With dead ends: 107 [2021-10-21 19:21:28,882 INFO L226 Difference]: Without dead ends: 107 [2021-10-21 19:21:28,883 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1725.4ms TimeCoverageRelationStatistics Valid=253, Invalid=2003, Unknown=0, NotChecked=0, Total=2256 [2021-10-21 19:21:28,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-21 19:21:28,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 103. [2021-10-21 19:21:28,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 95 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2021-10-21 19:21:28,886 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 40 [2021-10-21 19:21:28,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:28,887 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2021-10-21 19:21:28,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.0) internal successors, (60), 27 states have internal predecessors, (60), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:21:28,887 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2021-10-21 19:21:28,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:21:28,888 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:28,888 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:21:28,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:21:29,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:21:29,111 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting _destroy_in_nondeterministic_orderErr36ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:29,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:29,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1500447370, now seen corresponding path program 1 times [2021-10-21 19:21:29,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:29,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052189367] [2021-10-21 19:21:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:29,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:29,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:29,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:21:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:21:29,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:29,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052189367] [2021-10-21 19:21:29,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052189367] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:21:29,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:21:29,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-10-21 19:21:29,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045895818] [2021-10-21 19:21:29,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:21:29,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:29,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:21:29,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:21:29,401 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:21:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:29,923 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2021-10-21 19:21:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:21:29,924 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-10-21 19:21:29,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:29,925 INFO L225 Difference]: With dead ends: 102 [2021-10-21 19:21:29,925 INFO L226 Difference]: Without dead ends: 102 [2021-10-21 19:21:29,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 286.8ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:21:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-21 19:21:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-10-21 19:21:29,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 94 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:29,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2021-10-21 19:21:29,928 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 40 [2021-10-21 19:21:29,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:29,929 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2021-10-21 19:21:29,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-21 19:21:29,929 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2021-10-21 19:21:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 19:21:29,930 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:29,930 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:21:29,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-21 19:21:29,930 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting _destroy_in_nondeterministic_orderErr15ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:29,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:29,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1505910075, now seen corresponding path program 1 times [2021-10-21 19:21:29,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:29,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941390776] [2021-10-21 19:21:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:29,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:30,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:30,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:21:30,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:30,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:30,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941390776] [2021-10-21 19:21:30,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941390776] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:30,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41788557] [2021-10-21 19:21:30,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:30,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:21:30,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:21:30,313 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:21:30,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:21:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:30,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-21 19:21:30,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:21:30,617 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:21:30,617 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 [2021-10-21 19:21:30,683 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 [2021-10-21 19:21:30,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:21:30,911 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 23 [2021-10-21 19:21:31,240 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:21:31,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-21 19:21:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:31,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41788557] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:31,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:21:31,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 28 [2021-10-21 19:21:31,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378872304] [2021-10-21 19:21:31,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-21 19:21:31,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:31,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-21 19:21:31,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:21:31,304 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 29 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:21:32,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:21:32,441 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-10-21 19:21:32,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:21:32,455 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-10-21 19:21:32,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:21:32,456 INFO L225 Difference]: With dead ends: 101 [2021-10-21 19:21:32,456 INFO L226 Difference]: Without dead ends: 101 [2021-10-21 19:21:32,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 793.0ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-10-21 19:21:32,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-21 19:21:32,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-10-21 19:21:32,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 93 states have internal predecessors, (99), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:21:32,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2021-10-21 19:21:32,461 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 43 [2021-10-21 19:21:32,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:21:32,461 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2021-10-21 19:21:32,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 23 states have internal predecessors, (55), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:21:32,462 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2021-10-21 19:21:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 19:21:32,462 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:21:32,463 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:21:32,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:21:32,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:21:32,687 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting _destroy_in_nondeterministic_orderErr9ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:21:32,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:21:32,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1506341051, now seen corresponding path program 1 times [2021-10-21 19:21:32,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:21:32,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916494372] [2021-10-21 19:21:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:32,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:21:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:32,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:21:32,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:32,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:21:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:33,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:21:33,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916494372] [2021-10-21 19:21:33,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916494372] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:33,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589079025] [2021-10-21 19:21:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:21:33,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:21:33,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:21:33,168 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:21:33,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:21:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:21:33,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-21 19:21:33,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:21:33,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:21:33,629 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:21:33,630 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 [2021-10-21 19:21:33,680 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-21 19:21:33,680 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 16 treesize of output 18 [2021-10-21 19:21:33,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-21 19:21:33,749 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:21:33,749 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-10-21 19:21:33,893 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-21 19:21:33,894 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 42 treesize of output 39 [2021-10-21 19:21:34,000 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-10-21 19:21:34,001 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 60 treesize of output 66 [2021-10-21 19:21:37,018 INFO L354 Elim1Store]: treesize reduction 104, result has 21.8 percent of original size [2021-10-21 19:21:37,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 115 treesize of output 71 [2021-10-21 19:21:37,721 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:21:37,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-21 19:21:37,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:21:37,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589079025] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:21:37,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:21:37,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 34 [2021-10-21 19:21:37,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846291965] [2021-10-21 19:21:37,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-21 19:21:37,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:21:37,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-21 19:21:37,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1111, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:21:37,809 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 35 states, 32 states have (on average 2.125) internal successors, (68), 29 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:22:12,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:22:12,422 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-10-21 19:22:12,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:22:12,423 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.125) internal successors, (68), 29 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2021-10-21 19:22:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:22:12,424 INFO L225 Difference]: With dead ends: 104 [2021-10-21 19:22:12,424 INFO L226 Difference]: Without dead ends: 104 [2021-10-21 19:22:12,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 10446.5ms TimeCoverageRelationStatistics Valid=338, Invalid=2963, Unknown=5, NotChecked=0, Total=3306 [2021-10-21 19:22:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-21 19:22:12,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-10-21 19:22:12,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 92 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:22:12,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 105 transitions. [2021-10-21 19:22:12,428 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 105 transitions. Word has length 43 [2021-10-21 19:22:12,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:22:12,428 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 105 transitions. [2021-10-21 19:22:12,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.125) internal successors, (68), 29 states have internal predecessors, (68), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:22:12,429 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 105 transitions. [2021-10-21 19:22:12,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-21 19:22:12,429 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:22:12,429 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:22:12,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:22:12,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:22:12,630 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting _destroy_in_nondeterministic_orderErr30ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:22:12,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:22:12,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1240568634, now seen corresponding path program 1 times [2021-10-21 19:22:12,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:22:12,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599239067] [2021-10-21 19:22:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:12,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:22:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:12,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:22:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:12,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:22:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:13,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:22:13,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599239067] [2021-10-21 19:22:13,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599239067] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:13,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748758691] [2021-10-21 19:22:13,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:13,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:22:13,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:22:13,330 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:22:13,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:22:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:13,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-21 19:22:13,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:22:13,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:22:13,733 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:22:13,733 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 [2021-10-21 19:22:13,860 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-21 19:22:13,860 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 [2021-10-21 19:22:13,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:22:13,964 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:22:13,964 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 38 treesize of output 28 [2021-10-21 19:22:14,154 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-21 19:22:14,154 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 41 treesize of output 38 [2021-10-21 19:22:14,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:22:14,267 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-21 19:22:14,267 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 59 [2021-10-21 19:22:15,103 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-21 19:22:15,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 36 [2021-10-21 19:22:15,162 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:22:15,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-21 19:22:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:15,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748758691] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:15,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:22:15,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 39 [2021-10-21 19:22:15,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361489222] [2021-10-21 19:22:15,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-21 19:22:15,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:22:15,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-21 19:22:15,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-10-21 19:22:15,245 INFO L87 Difference]: Start difference. First operand 100 states and 105 transitions. Second operand has 40 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:22:17,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:22:17,433 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-10-21 19:22:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:22:17,433 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-10-21 19:22:17,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:22:17,434 INFO L225 Difference]: With dead ends: 101 [2021-10-21 19:22:17,434 INFO L226 Difference]: Without dead ends: 101 [2021-10-21 19:22:17,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 2357.6ms TimeCoverageRelationStatistics Valid=339, Invalid=3083, Unknown=0, NotChecked=0, Total=3422 [2021-10-21 19:22:17,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-21 19:22:17,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2021-10-21 19:22:17,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 89 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:22:17,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2021-10-21 19:22:17,439 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 44 [2021-10-21 19:22:17,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:22:17,439 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2021-10-21 19:22:17,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 34 states have internal predecessors, (64), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:22:17,440 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2021-10-21 19:22:17,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-21 19:22:17,440 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:22:17,441 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:22:17,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-21 19:22:17,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-21 19:22:17,651 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting _destroy_in_nondeterministic_orderErr24ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:22:17,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:22:17,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1240137658, now seen corresponding path program 1 times [2021-10-21 19:22:17,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:22:17,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096498954] [2021-10-21 19:22:17,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:17,652 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:22:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:17,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:22:17,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:17,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:22:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:18,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:22:18,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096498954] [2021-10-21 19:22:18,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096498954] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:18,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512098429] [2021-10-21 19:22:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:18,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:22:18,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:22:18,062 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:22:18,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:22:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:18,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-21 19:22:18,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:22:18,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:22:18,536 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:22:18,536 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 [2021-10-21 19:22:18,613 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-21 19:22:18,614 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 16 treesize of output 18 [2021-10-21 19:22:18,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-21 19:22:18,695 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:22:18,695 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 30 treesize of output 24 [2021-10-21 19:22:18,821 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-21 19:22:18,821 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 33 treesize of output 34 [2021-10-21 19:22:18,915 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-10-21 19:22:18,916 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 46 treesize of output 56 [2021-10-21 19:22:21,383 INFO L354 Elim1Store]: treesize reduction 104, result has 21.8 percent of original size [2021-10-21 19:22:21,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 61 [2021-10-21 19:22:21,609 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:22:21,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2021-10-21 19:22:21,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:21,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512098429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:21,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:22:21,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-10-21 19:22:21,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051481491] [2021-10-21 19:22:21,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-21 19:22:21,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:22:21,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-21 19:22:21,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1454, Unknown=1, NotChecked=0, Total=1560 [2021-10-21 19:22:21,854 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand has 40 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:22:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:22:46,822 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2021-10-21 19:22:46,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-21 19:22:46,823 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-10-21 19:22:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:22:46,823 INFO L225 Difference]: With dead ends: 100 [2021-10-21 19:22:46,823 INFO L226 Difference]: Without dead ends: 100 [2021-10-21 19:22:46,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 13158.0ms TimeCoverageRelationStatistics Valid=399, Invalid=3626, Unknown=7, NotChecked=0, Total=4032 [2021-10-21 19:22:46,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-21 19:22:46,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2021-10-21 19:22:46,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 82 states have (on average 1.146341463414634) internal successors, (94), 88 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:22:46,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-10-21 19:22:46,828 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 44 [2021-10-21 19:22:46,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:22:46,828 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-10-21 19:22:46,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 34 states have internal predecessors, (71), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:22:46,828 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-10-21 19:22:46,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-21 19:22:46,829 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:22:46,829 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:22:46,853 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-10-21 19:22:47,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:22:47,033 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting _destroy_in_nondeterministic_orderErr45ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:22:47,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:22:47,033 INFO L82 PathProgramCache]: Analyzing trace with hash -762542534, now seen corresponding path program 1 times [2021-10-21 19:22:47,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:22:47,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065779276] [2021-10-21 19:22:47,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:47,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:22:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:47,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:22:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:47,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:22:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:47,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:22:47,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065779276] [2021-10-21 19:22:47,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065779276] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:47,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656873566] [2021-10-21 19:22:47,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:47,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:22:47,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:22:47,718 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:22:47,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:22:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:48,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-21 19:22:48,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:22:48,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:22:48,345 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:22:48,346 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 [2021-10-21 19:22:48,441 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-21 19:22:48,442 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 [2021-10-21 19:22:48,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:22:48,519 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:22:48,520 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 85 treesize of output 80 [2021-10-21 19:22:48,713 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-21 19:22:48,713 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 50 treesize of output 43 [2021-10-21 19:22:48,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:22:48,813 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-10-21 19:22:48,813 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 59 [2021-10-21 19:22:49,601 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-21 19:22:49,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 36 [2021-10-21 19:22:49,643 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:22:49,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-10-21 19:22:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:49,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656873566] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:49,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:22:49,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 38 [2021-10-21 19:22:49,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859326376] [2021-10-21 19:22:49,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-21 19:22:49,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:22:49,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-21 19:22:49,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 19:22:49,715 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 39 states, 36 states have (on average 1.75) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:22:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:22:51,890 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-10-21 19:22:51,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 19:22:51,890 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.75) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-10-21 19:22:51,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:22:51,891 INFO L225 Difference]: With dead ends: 99 [2021-10-21 19:22:51,891 INFO L226 Difference]: Without dead ends: 99 [2021-10-21 19:22:51,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2260.0ms TimeCoverageRelationStatistics Valid=325, Invalid=2981, Unknown=0, NotChecked=0, Total=3306 [2021-10-21 19:22:51,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-21 19:22:51,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2021-10-21 19:22:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 87 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:22:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 100 transitions. [2021-10-21 19:22:51,894 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 100 transitions. Word has length 44 [2021-10-21 19:22:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:22:51,895 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 100 transitions. [2021-10-21 19:22:51,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.75) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:22:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 100 transitions. [2021-10-21 19:22:51,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-21 19:22:51,895 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:22:51,895 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:22:51,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:22:52,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 19:22:52,096 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting _destroy_in_nondeterministic_orderErr39ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:22:52,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:22:52,097 INFO L82 PathProgramCache]: Analyzing trace with hash -762973510, now seen corresponding path program 1 times [2021-10-21 19:22:52,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:22:52,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849623256] [2021-10-21 19:22:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:52,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:22:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:52,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:22:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:52,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:22:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:52,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:52,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:22:52,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849623256] [2021-10-21 19:22:52,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849623256] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:52,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634111090] [2021-10-21 19:22:52,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:52,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:22:52,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:22:52,386 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:22:52,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:22:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:52,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 19:22:52,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:22:52,913 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:22:52,914 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 [2021-10-21 19:22:52,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-21 19:22:53,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:22:53,074 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 18 treesize of output 18 [2021-10-21 19:22:53,252 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:22:53,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2021-10-21 19:22:53,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:53,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634111090] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:53,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:22:53,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2021-10-21 19:22:53,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657467294] [2021-10-21 19:22:53,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-21 19:22:53,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:22:53,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-21 19:22:53,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:22:53,462 INFO L87 Difference]: Start difference. First operand 95 states and 100 transitions. Second operand has 28 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:22:54,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:22:54,402 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-10-21 19:22:54,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:22:54,402 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 44 [2021-10-21 19:22:54,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:22:54,403 INFO L225 Difference]: With dead ends: 94 [2021-10-21 19:22:54,403 INFO L226 Difference]: Without dead ends: 94 [2021-10-21 19:22:54,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 688.1ms TimeCoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-10-21 19:22:54,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-21 19:22:54,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-10-21 19:22:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 86 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:22:54,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2021-10-21 19:22:54,407 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 44 [2021-10-21 19:22:54,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:22:54,408 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2021-10-21 19:22:54,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:22:54,408 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2021-10-21 19:22:54,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:22:54,409 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:22:54,409 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:22:54,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:22:54,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 19:22:54,623 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting _destroy_in_nondeterministic_orderErr18ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:22:54,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:22:54,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1633566043, now seen corresponding path program 1 times [2021-10-21 19:22:54,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:22:54,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459725454] [2021-10-21 19:22:54,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:54,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:22:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:54,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:22:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:54,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:22:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:55,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:22:55,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459725454] [2021-10-21 19:22:55,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459725454] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:55,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949043720] [2021-10-21 19:22:55,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:22:55,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:22:55,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:22:55,374 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:22:55,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:22:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:22:55,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-21 19:22:55,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:22:55,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-21 19:22:55,917 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-21 19:22:55,917 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 [2021-10-21 19:22:56,010 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-10-21 19:22:56,010 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 [2021-10-21 19:22:56,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:22:56,094 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:22:56,094 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 85 treesize of output 80 [2021-10-21 19:22:56,297 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-21 19:22:56,297 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 50 treesize of output 43 [2021-10-21 19:22:56,414 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-21 19:22:56,415 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 57 [2021-10-21 19:22:57,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:22:57,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:22:57,100 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-10-21 19:22:57,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 60 [2021-10-21 19:22:57,757 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:22:57,757 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 1 case distinctions, treesize of input 20 treesize of output 22 [2021-10-21 19:22:57,891 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-21 19:22:57,891 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 25 treesize of output 30 [2021-10-21 19:22:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:22:58,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949043720] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:22:58,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:22:58,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 43 [2021-10-21 19:22:58,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885843826] [2021-10-21 19:22:58,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-21 19:22:58,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:22:58,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-21 19:22:58,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2021-10-21 19:22:58,018 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 44 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 38 states have internal predecessors, (72), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:23:01,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:01,359 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-10-21 19:23:01,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-21 19:23:01,360 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 38 states have internal predecessors, (72), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2021-10-21 19:23:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:01,361 INFO L225 Difference]: With dead ends: 96 [2021-10-21 19:23:01,361 INFO L226 Difference]: Without dead ends: 96 [2021-10-21 19:23:01,362 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 726 ImplicationChecksByTransitivity, 3405.2ms TimeCoverageRelationStatistics Valid=375, Invalid=4047, Unknown=0, NotChecked=0, Total=4422 [2021-10-21 19:23:01,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-21 19:23:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2021-10-21 19:23:01,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 84 states have internal predecessors, (90), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:23:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2021-10-21 19:23:01,366 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 46 [2021-10-21 19:23:01,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:01,366 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2021-10-21 19:23:01,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 38 states have internal predecessors, (72), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:23:01,366 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2021-10-21 19:23:01,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:23:01,367 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:01,367 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:23:01,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:23:01,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-21 19:23:01,573 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting _destroy_in_nondeterministic_orderErr33ASSERT_VIOLATIONMEMORY_FREE === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:23:01,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:01,574 INFO L82 PathProgramCache]: Analyzing trace with hash -413294311, now seen corresponding path program 1 times [2021-10-21 19:23:01,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:01,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715425884] [2021-10-21 19:23:01,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:01,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:01,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:23:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:01,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:23:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:23:02,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:02,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715425884] [2021-10-21 19:23:02,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715425884] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:02,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62723939] [2021-10-21 19:23:02,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:02,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:02,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:23:02,213 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:23:02,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:23:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:02,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-21 19:23:02,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:23:02,861 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 [2021-10-21 19:23:02,927 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:23:02,928 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 [2021-10-21 19:23:03,008 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-21 19:23:03,008 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 16 treesize of output 18 [2021-10-21 19:23:03,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-21 19:23:03,102 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:23:03,102 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 30 treesize of output 24 [2021-10-21 19:23:03,223 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-21 19:23:03,223 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 33 treesize of output 34 [2021-10-21 19:23:03,301 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-21 19:23:03,301 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 48 [2021-10-21 19:23:03,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:03,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:23:03,909 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-10-21 19:23:03,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 12 case distinctions, treesize of input 57 treesize of output 51 [2021-10-21 19:23:04,284 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:23:04,285 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 45 treesize of output 51 [2021-10-21 19:23:04,738 INFO L354 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2021-10-21 19:23:04,738 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 54 treesize of output 71 [2021-10-21 19:23:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:23:05,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62723939] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:05,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:23:05,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 44 [2021-10-21 19:23:05,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323045013] [2021-10-21 19:23:05,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-21 19:23:05,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:05,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-21 19:23:05,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1848, Unknown=0, NotChecked=0, Total=1980 [2021-10-21 19:23:05,482 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 39 states have internal predecessors, (77), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:23:08,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:08,352 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-10-21 19:23:08,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-21 19:23:08,353 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 39 states have internal predecessors, (77), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2021-10-21 19:23:08,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:08,353 INFO L225 Difference]: With dead ends: 94 [2021-10-21 19:23:08,353 INFO L226 Difference]: Without dead ends: 94 [2021-10-21 19:23:08,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 3047.9ms TimeCoverageRelationStatistics Valid=442, Invalid=4388, Unknown=0, NotChecked=0, Total=4830 [2021-10-21 19:23:08,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-21 19:23:08,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2021-10-21 19:23:08,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 82 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:23:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2021-10-21 19:23:08,357 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 47 [2021-10-21 19:23:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:08,357 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2021-10-21 19:23:08,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 1.8333333333333333) internal successors, (77), 39 states have internal predecessors, (77), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-21 19:23:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2021-10-21 19:23:08,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-21 19:23:08,357 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:08,358 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:23:08,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-21 19:23:08,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 19:23:08,558 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:23:08,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:08,559 INFO L82 PathProgramCache]: Analyzing trace with hash 491836438, now seen corresponding path program 1 times [2021-10-21 19:23:08,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:08,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311944269] [2021-10-21 19:23:08,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:08,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:08,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:23:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:08,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:23:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:09,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-21 19:23:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:23:09,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:09,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311944269] [2021-10-21 19:23:09,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311944269] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:09,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169111257] [2021-10-21 19:23:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:09,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:09,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:23:09,887 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:23:09,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:23:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:10,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-21 19:23:10,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:23:10,648 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-21 19:23:10,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-10-21 19:23:10,833 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-21 19:23:10,833 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 [2021-10-21 19:23:10,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:23:11,050 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:23:11,051 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 56 treesize of output 38 [2021-10-21 19:23:11,290 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-21 19:23:11,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 48 [2021-10-21 19:23:11,423 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-21 19:23:11,423 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-10-21 19:23:11,933 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-21 19:23:11,933 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 94 treesize of output 80 [2021-10-21 19:23:11,938 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-21 19:23:11,938 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 71 treesize of output 59 [2021-10-21 19:23:16,996 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-10-21 19:23:16,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 262 [2021-10-21 19:23:17,043 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-21 19:23:17,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 case distinctions, treesize of input 232 treesize of output 229 [2021-10-21 19:23:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:23:22,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169111257] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:22,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:23:22,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-10-21 19:23:22,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386987152] [2021-10-21 19:23:22,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-21 19:23:22,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:22,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-21 19:23:22,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2411, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 19:23:22,326 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:23:36,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:23:36,905 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2021-10-21 19:23:36,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-21 19:23:36,905 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2021-10-21 19:23:36,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:23:36,908 INFO L225 Difference]: With dead ends: 160 [2021-10-21 19:23:36,908 INFO L226 Difference]: Without dead ends: 148 [2021-10-21 19:23:36,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2092 ImplicationChecksByTransitivity, 17314.4ms TimeCoverageRelationStatistics Valid=566, Invalid=8363, Unknown=1, NotChecked=0, Total=8930 [2021-10-21 19:23:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-21 19:23:36,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 124. [2021-10-21 19:23:36,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 113 states have (on average 1.0884955752212389) internal successors, (123), 114 states have internal predecessors, (123), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:23:36,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2021-10-21 19:23:36,920 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 50 [2021-10-21 19:23:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:23:36,920 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2021-10-21 19:23:36,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:23:36,921 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2021-10-21 19:23:36,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-21 19:23:36,922 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:23:36,922 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:23:36,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:23:37,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:37,151 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:23:37,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:23:37,151 INFO L82 PathProgramCache]: Analyzing trace with hash -713295800, now seen corresponding path program 1 times [2021-10-21 19:23:37,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:23:37,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147355582] [2021-10-21 19:23:37,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:37,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:23:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:37,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:23:37,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:37,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:23:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:38,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-21 19:23:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:23:38,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:23:38,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147355582] [2021-10-21 19:23:38,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147355582] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:38,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333718325] [2021-10-21 19:23:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:23:38,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:23:38,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:23:38,671 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:23:38,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:23:39,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:23:39,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-21 19:23:39,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:23:39,548 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-21 19:23:39,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-10-21 19:23:39,727 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-21 19:23:39,727 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 [2021-10-21 19:23:39,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:23:39,942 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:23:39,943 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 56 treesize of output 38 [2021-10-21 19:23:40,204 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-21 19:23:40,204 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 59 treesize of output 48 [2021-10-21 19:23:40,335 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-21 19:23:40,335 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-10-21 19:23:40,831 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-21 19:23:40,831 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 94 treesize of output 80 [2021-10-21 19:23:40,836 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-21 19:23:40,836 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 71 treesize of output 59 [2021-10-21 19:23:46,153 INFO L354 Elim1Store]: treesize reduction 350, result has 32.6 percent of original size [2021-10-21 19:23:46,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 260 [2021-10-21 19:23:46,198 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-21 19:23:46,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 case distinctions, treesize of input 230 treesize of output 227 [2021-10-21 19:23:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:23:46,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333718325] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:23:46,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:23:46,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-10-21 19:23:46,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840569013] [2021-10-21 19:23:46,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-21 19:23:46,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:23:46,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-21 19:23:46,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2414, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 19:23:46,955 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:24:05,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:24:05,837 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-10-21 19:24:05,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-21 19:24:05,838 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2021-10-21 19:24:05,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:24:05,839 INFO L225 Difference]: With dead ends: 159 [2021-10-21 19:24:05,839 INFO L226 Difference]: Without dead ends: 143 [2021-10-21 19:24:05,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2113 ImplicationChecksByTransitivity, 21757.5ms TimeCoverageRelationStatistics Valid=575, Invalid=8736, Unknown=1, NotChecked=0, Total=9312 [2021-10-21 19:24:05,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-21 19:24:05,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 120. [2021-10-21 19:24:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 109 states have (on average 1.0825688073394495) internal successors, (118), 110 states have internal predecessors, (118), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:24:05,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2021-10-21 19:24:05,846 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 50 [2021-10-21 19:24:05,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:24:05,847 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2021-10-21 19:24:05,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 46 states have internal predecessors, (83), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:24:05,847 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2021-10-21 19:24:05,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 19:24:05,848 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:24:05,848 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:24:05,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-21 19:24:06,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 19:24:06,055 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:24:06,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:24:06,055 INFO L82 PathProgramCache]: Analyzing trace with hash -816818038, now seen corresponding path program 1 times [2021-10-21 19:24:06,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:24:06,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818334906] [2021-10-21 19:24:06,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:24:06,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:24:06,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:06,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:24:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:06,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:24:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:06,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-21 19:24:06,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:24:07,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:24:07,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818334906] [2021-10-21 19:24:07,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818334906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:24:07,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331620528] [2021-10-21 19:24:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:24:07,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:24:07,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:24:07,584 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:24:07,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:24:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:08,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-21 19:24:08,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:24:08,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:24:08,959 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:24:08,960 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 65 treesize of output 51 [2021-10-21 19:24:09,205 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-21 19:24:09,205 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 3 case distinctions, treesize of input 68 treesize of output 61 [2021-10-21 19:24:09,330 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-21 19:24:09,331 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 80 [2021-10-21 19:24:09,859 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-21 19:24:09,860 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 84 treesize of output 70 [2021-10-21 19:24:12,176 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-10-21 19:24:12,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 227 treesize of output 287 [2021-10-21 19:24:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:24:13,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331620528] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:24:13,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:24:13,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 53 [2021-10-21 19:24:13,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295300130] [2021-10-21 19:24:13,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-21 19:24:13,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:24:13,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-21 19:24:13,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2709, Unknown=0, NotChecked=0, Total=2862 [2021-10-21 19:24:13,981 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand has 54 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 49 states have internal predecessors, (86), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:24:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:24:24,355 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2021-10-21 19:24:24,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-21 19:24:24,357 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 49 states have internal predecessors, (86), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-10-21 19:24:24,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:24:24,358 INFO L225 Difference]: With dead ends: 156 [2021-10-21 19:24:24,358 INFO L226 Difference]: Without dead ends: 146 [2021-10-21 19:24:24,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1566 ImplicationChecksByTransitivity, 10258.1ms TimeCoverageRelationStatistics Valid=414, Invalid=6558, Unknown=0, NotChecked=0, Total=6972 [2021-10-21 19:24:24,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-10-21 19:24:24,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2021-10-21 19:24:24,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 126 states have (on average 1.0793650793650793) internal successors, (136), 128 states have internal predecessors, (136), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-10-21 19:24:24,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2021-10-21 19:24:24,365 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 51 [2021-10-21 19:24:24,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:24:24,366 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2021-10-21 19:24:24,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 49 states have internal predecessors, (86), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:24:24,366 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2021-10-21 19:24:24,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 19:24:24,367 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:24:24,367 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:24:24,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-10-21 19:24:24,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:24:24,583 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:24:24,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:24:24,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2021950276, now seen corresponding path program 1 times [2021-10-21 19:24:24,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:24:24,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489052419] [2021-10-21 19:24:24,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:24:24,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:24:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:24,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:24:24,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:24,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:24:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:25,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-21 19:24:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:24:26,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:24:26,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489052419] [2021-10-21 19:24:26,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489052419] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:24:26,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690661786] [2021-10-21 19:24:26,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:24:26,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:24:26,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:24:26,207 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:24:26,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:24:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:24:27,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-21 19:24:27,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:24:27,250 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-21 19:24:27,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-10-21 19:24:27,475 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-21 19:24:27,476 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 [2021-10-21 19:24:27,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:24:27,676 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:24:27,676 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 56 treesize of output 38 [2021-10-21 19:24:27,920 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-21 19:24:27,920 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 59 treesize of output 48 [2021-10-21 19:24:28,089 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-21 19:24:28,090 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-10-21 19:24:28,628 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-21 19:24:28,628 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 94 treesize of output 80 [2021-10-21 19:24:28,633 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-21 19:24:28,633 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 71 treesize of output 59 [2021-10-21 19:24:34,384 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-10-21 19:24:34,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 262 [2021-10-21 19:24:34,420 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-21 19:24:34,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 case distinctions, treesize of input 232 treesize of output 229 [2021-10-21 19:24:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:24:37,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690661786] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:24:37,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:24:37,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 51 [2021-10-21 19:24:37,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160697401] [2021-10-21 19:24:37,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-21 19:24:37,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:24:37,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-21 19:24:37,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2518, Unknown=0, NotChecked=0, Total=2652 [2021-10-21 19:24:37,270 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:24:48,366 WARN L207 SmtUtils]: Spent 5.69 s on a formula simplification. DAG size of input: 104 DAG size of output: 67 [2021-10-21 19:24:54,860 WARN L207 SmtUtils]: Spent 5.73 s on a formula simplification. DAG size of input: 110 DAG size of output: 66 [2021-10-21 19:25:02,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:25:02,731 INFO L93 Difference]: Finished difference Result 172 states and 185 transitions. [2021-10-21 19:25:02,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-21 19:25:02,731 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-10-21 19:25:02,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:25:02,732 INFO L225 Difference]: With dead ends: 172 [2021-10-21 19:25:02,732 INFO L226 Difference]: Without dead ends: 156 [2021-10-21 19:25:02,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 29251.8ms TimeCoverageRelationStatistics Valid=562, Invalid=9140, Unknown=0, NotChecked=0, Total=9702 [2021-10-21 19:25:02,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-21 19:25:02,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 141. [2021-10-21 19:25:02,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 127 states have (on average 1.078740157480315) internal successors, (137), 129 states have internal predecessors, (137), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-10-21 19:25:02,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 153 transitions. [2021-10-21 19:25:02,741 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 153 transitions. Word has length 51 [2021-10-21 19:25:02,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:25:02,742 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 153 transitions. [2021-10-21 19:25:02,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:25:02,742 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 153 transitions. [2021-10-21 19:25:02,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 19:25:02,743 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:25:02,743 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:25:02,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:25:02,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:25:02,963 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:25:02,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:25:02,964 INFO L82 PathProgramCache]: Analyzing trace with hash 539653616, now seen corresponding path program 1 times [2021-10-21 19:25:02,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:25:02,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448129712] [2021-10-21 19:25:02,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:25:02,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:25:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:03,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:25:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:03,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:25:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:03,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-21 19:25:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:25:04,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:25:04,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448129712] [2021-10-21 19:25:04,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448129712] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:25:04,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247740171] [2021-10-21 19:25:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:25:04,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:25:04,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:25:04,658 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:25:04,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:25:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:25:05,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-21 19:25:05,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:25:05,879 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-21 19:25:05,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-10-21 19:25:06,116 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-21 19:25:06,117 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 [2021-10-21 19:25:06,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:25:06,349 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:25:06,350 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 56 treesize of output 38 [2021-10-21 19:25:06,599 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-21 19:25:06,600 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 59 treesize of output 48 [2021-10-21 19:25:06,752 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-21 19:25:06,752 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-10-21 19:25:07,253 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-21 19:25:07,253 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 94 treesize of output 80 [2021-10-21 19:25:07,259 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-21 19:25:07,259 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 71 treesize of output 59 [2021-10-21 19:25:12,408 INFO L354 Elim1Store]: treesize reduction 350, result has 32.6 percent of original size [2021-10-21 19:25:12,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 260 [2021-10-21 19:25:12,442 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-21 19:25:12,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 case distinctions, treesize of input 230 treesize of output 227 [2021-10-21 19:25:48,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:25:48,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247740171] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:25:48,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:25:48,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 51 [2021-10-21 19:25:48,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046034706] [2021-10-21 19:25:48,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-21 19:25:48,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:25:48,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-21 19:25:48,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2518, Unknown=0, NotChecked=0, Total=2652 [2021-10-21 19:25:48,851 INFO L87 Difference]: Start difference. First operand 141 states and 153 transitions. Second operand has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:26:05,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:05,687 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2021-10-21 19:26:05,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-21 19:26:05,687 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-10-21 19:26:05,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:05,689 INFO L225 Difference]: With dead ends: 169 [2021-10-21 19:26:05,689 INFO L226 Difference]: Without dead ends: 157 [2021-10-21 19:26:05,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 19917.9ms TimeCoverageRelationStatistics Valid=564, Invalid=9138, Unknown=0, NotChecked=0, Total=9702 [2021-10-21 19:26:05,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-10-21 19:26:05,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 145. [2021-10-21 19:26:05,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 131 states have (on average 1.0763358778625953) internal successors, (141), 133 states have internal predecessors, (141), 6 states have call successors, (6), 6 states have call predecessors, (6), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2021-10-21 19:26:05,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2021-10-21 19:26:05,696 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 51 [2021-10-21 19:26:05,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:05,696 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2021-10-21 19:26:05,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 47 states have internal predecessors, (84), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:26:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2021-10-21 19:26:05,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-21 19:26:05,697 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:05,698 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-21 19:26:05,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:05,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:05,911 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:26:05,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:05,911 INFO L82 PathProgramCache]: Analyzing trace with hash -665478622, now seen corresponding path program 1 times [2021-10-21 19:26:05,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:05,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920150652] [2021-10-21 19:26:05,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:05,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:05,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:06,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:06,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:26:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:06,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-21 19:26:06,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:07,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:07,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920150652] [2021-10-21 19:26:07,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920150652] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:07,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393474917] [2021-10-21 19:26:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:07,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:07,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:07,644 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:07,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:26:08,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:08,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-21 19:26:08,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:08,912 INFO L354 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2021-10-21 19:26:08,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 26 [2021-10-21 19:26:09,094 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-10-21 19:26:09,095 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 [2021-10-21 19:26:09,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-21 19:26:09,305 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-21 19:26:09,305 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 56 treesize of output 38 [2021-10-21 19:26:09,559 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-10-21 19:26:09,559 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 59 treesize of output 48 [2021-10-21 19:26:09,694 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-10-21 19:26:09,694 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 80 treesize of output 72 [2021-10-21 19:26:10,198 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-21 19:26:10,198 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 94 treesize of output 82 [2021-10-21 19:26:10,205 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-10-21 19:26:10,205 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 76 treesize of output 62 [2021-10-21 19:26:18,061 INFO L354 Elim1Store]: treesize reduction 348, result has 32.9 percent of original size [2021-10-21 19:26:18,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 45 case distinctions, treesize of input 174 treesize of output 262 [2021-10-21 19:26:18,094 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-21 19:26:18,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 7 case distinctions, treesize of input 232 treesize of output 229 [2021-10-21 19:26:22,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:22,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393474917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:22,647 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:26:22,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 25] total 50 [2021-10-21 19:26:22,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581456602] [2021-10-21 19:26:22,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-21 19:26:22,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:22,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-21 19:26:22,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2419, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 19:26:22,649 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 51 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 46 states have internal predecessors, (85), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:26:38,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:38,533 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2021-10-21 19:26:38,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-21 19:26:38,533 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 46 states have internal predecessors, (85), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-10-21 19:26:38,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:38,535 INFO L225 Difference]: With dead ends: 164 [2021-10-21 19:26:38,535 INFO L226 Difference]: Without dead ends: 134 [2021-10-21 19:26:38,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 21631.8ms TimeCoverageRelationStatistics Valid=562, Invalid=8944, Unknown=0, NotChecked=0, Total=9506 [2021-10-21 19:26:38,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-21 19:26:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 125. [2021-10-21 19:26:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 114 states have (on average 1.0701754385964912) internal successors, (122), 115 states have internal predecessors, (122), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2021-10-21 19:26:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2021-10-21 19:26:38,541 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 51 [2021-10-21 19:26:38,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:38,541 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2021-10-21 19:26:38,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 46 states have internal predecessors, (85), 4 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-21 19:26:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2021-10-21 19:26:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-21 19:26:38,542 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:38,543 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:38,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:38,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-21 19:26:38,757 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ENSURES_VIOLATIONMEMORY_LEAK === [_destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION, _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION (and 59 more)] === [2021-10-21 19:26:38,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:38,758 INFO L82 PathProgramCache]: Analyzing trace with hash 61109274, now seen corresponding path program 2 times [2021-10-21 19:26:38,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:38,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458195750] [2021-10-21 19:26:38,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:38,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:38,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:38,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-21 19:26:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:38,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-10-21 19:26:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:38,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:38,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458195750] [2021-10-21 19:26:38,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458195750] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:38,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984199346] [2021-10-21 19:26:38,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:26:38,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:38,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:38,893 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:38,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:26:40,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:26:40,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:26:40,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:26:40,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:40,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984199346] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:40,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:26:40,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-10-21 19:26:40,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049622427] [2021-10-21 19:26:40,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:26:40,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:40,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:26:40,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:26:40,324 INFO L87 Difference]: Start difference. First operand 125 states and 133 transitions. Second operand has 11 states, 10 states have (on average 7.8) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:26:40,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:40,409 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-10-21 19:26:40,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:26:40,409 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.8) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 56 [2021-10-21 19:26:40,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:40,410 INFO L225 Difference]: With dead ends: 48 [2021-10-21 19:26:40,410 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:26:40,410 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:26:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:26:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:26:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:26:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:26:40,411 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2021-10-21 19:26:40,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:40,411 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:26:40,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.8) internal successors, (78), 8 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-21 19:26:40,411 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:26:40,411 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:26:40,413 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr0REQUIRES_VIOLATION [2021-10-21 19:26:40,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr1REQUIRES_VIOLATION [2021-10-21 19:26:40,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr2REQUIRES_VIOLATION [2021-10-21 19:26:40,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr3REQUIRES_VIOLATION [2021-10-21 19:26:40,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,414 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr11ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr12ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr13ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr14ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr15ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr16ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,415 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr17ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr18ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr19ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr20ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr21ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr22ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr23ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,416 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr24ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,417 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr25ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,417 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr26ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,417 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr27ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,417 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr28ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,417 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr29ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,417 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr30ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,417 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr31ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,417 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr32ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,418 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr33ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,418 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr34ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,418 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr35ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,418 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr36ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,418 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr37ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,419 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr38ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,419 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr39ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,419 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr40ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,419 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr41ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,419 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr42ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr43ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr44ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr45ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr46ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr47ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location _destroy_in_nondeterministic_orderErr48ASSERT_VIOLATIONMEMORY_FREE [2021-10-21 19:26:40,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr0REQUIRES_VIOLATION [2021-10-21 19:26:40,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr1REQUIRES_VIOLATION [2021-10-21 19:26:40,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr2REQUIRES_VIOLATION [2021-10-21 19:26:40,420 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr3REQUIRES_VIOLATION [2021-10-21 19:26:40,421 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr4REQUIRES_VIOLATION [2021-10-21 19:26:40,421 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr5REQUIRES_VIOLATION [2021-10-21 19:26:40,421 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr6REQUIRES_VIOLATION [2021-10-21 19:26:40,421 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr7REQUIRES_VIOLATION [2021-10-21 19:26:40,421 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr8REQUIRES_VIOLATION [2021-10-21 19:26:40,421 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr9REQUIRES_VIOLATION [2021-10-21 19:26:40,421 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr10REQUIRES_VIOLATION [2021-10-21 19:26:40,421 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_circular_createErr11REQUIRES_VIOLATION [2021-10-21 19:26:40,421 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:26:40,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:40,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-21 19:26:40,626 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:26:40,646 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:26:40 BoogieIcfgContainer [2021-10-21 19:26:40,646 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:26:40,647 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:26:40,647 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:26:40,647 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:26:40,647 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:21:06" (3/4) ... [2021-10-21 19:26:40,650 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:26:40,655 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 19:26:40,655 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-21 19:26:40,655 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-21 19:26:40,655 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure _destroy_in_nondeterministic_order [2021-10-21 19:26:40,655 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-21 19:26:40,655 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 19:26:40,655 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_circular_create [2021-10-21 19:26:40,661 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-21 19:26:40,661 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 19:26:40,662 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:26:40,662 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:26:40,728 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:26:40,728 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:26:40,729 INFO L168 Benchmark]: Toolchain (without parser) took 335139.83 ms. Allocated memory was 107.0 MB in the beginning and 302.0 MB in the end (delta: 195.0 MB). Free memory was 68.7 MB in the beginning and 64.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 198.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:26:40,729 INFO L168 Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 107.0 MB. Free memory is still 86.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:26:40,729 INFO L168 Benchmark]: CACSL2BoogieTranslator took 585.06 ms. Allocated memory is still 107.0 MB. Free memory was 68.4 MB in the beginning and 76.1 MB in the end (delta: -7.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:26:40,729 INFO L168 Benchmark]: Boogie Preprocessor took 63.55 ms. Allocated memory is still 107.0 MB. Free memory was 76.1 MB in the beginning and 73.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:26:40,730 INFO L168 Benchmark]: RCFGBuilder took 693.29 ms. Allocated memory is still 107.0 MB. Free memory was 73.2 MB in the beginning and 48.9 MB in the end (delta: 24.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:26:40,730 INFO L168 Benchmark]: TraceAbstraction took 333709.33 ms. Allocated memory was 107.0 MB in the beginning and 302.0 MB in the end (delta: 195.0 MB). Free memory was 48.5 MB in the beginning and 69.7 MB in the end (delta: -21.2 MB). Peak memory consumption was 178.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:26:40,730 INFO L168 Benchmark]: Witness Printer took 81.11 ms. Allocated memory is still 302.0 MB. Free memory was 69.7 MB in the beginning and 64.5 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:26:40,732 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48 ms. Allocated memory is still 107.0 MB. Free memory is still 86.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 585.06 ms. Allocated memory is still 107.0 MB. Free memory was 68.4 MB in the beginning and 76.1 MB in the end (delta: -7.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 63.55 ms. Allocated memory is still 107.0 MB. Free memory was 76.1 MB in the beginning and 73.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 693.29 ms. Allocated memory is still 107.0 MB. Free memory was 73.2 MB in the beginning and 48.9 MB in the end (delta: 24.3 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 333709.33 ms. Allocated memory was 107.0 MB in the beginning and 302.0 MB in the end (delta: 195.0 MB). Free memory was 48.5 MB in the beginning and 69.7 MB in the end (delta: -21.2 MB). Peak memory consumption was 178.0 MB. Max. memory is 16.1 GB. * Witness Printer took 81.11 ms. Allocated memory is still 302.0 MB. Free memory was 69.7 MB in the beginning and 64.5 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 586]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 586]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 589]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 589]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 589]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 591]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 591]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 591]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 592]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 592]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 592]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 598]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 601]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 601]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 601]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 604]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 604]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 604]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 607]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 610]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 610]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 610]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 612]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 612]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 612]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 613]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 613]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 613]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 568]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 568]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 569]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 569]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 576]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 576]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 577]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 577]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 617]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 159 locations, 62 error locations. Started 1 CEGAR loops. OverallTime: 333559.3ms, OverallIterations: 34, TraceHistogramMax: 3, EmptinessCheckTime: 38.3ms, AutomataDifference: 186226.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2671 SDtfs, 5843 SDslu, 18643 SDs, 0 SdLazy, 39547 SolverSat, 1521 SolverUnsat, 78 SolverUnknown, 0 SolverNotchecked, 65454.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2007 GetRequests, 669 SyntacticMatches, 25 SemanticMatches, 1313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17730 ImplicationChecksByTransitivity, 163582.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=152occurred in iteration=0, InterpolantAutomatonStates: 718, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 198.1ms AutomataMinimizationTime, 34 MinimizatonAttempts, 132 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 218.3ms SsaConstructionTime, 1072.4ms SatisfiabilityAnalysisTime, 130531.7ms InterpolantComputationTime, 2081 NumberOfCodeBlocks, 2081 NumberOfCodeBlocksAsserted, 55 NumberOfCheckSat, 2027 ConstructedInterpolants, 353 QuantifiedInterpolants, 49585 SizeOfPredicates, 258 NumberOfNonLiveVariables, 4008 ConjunctsInSsa, 826 ConjunctsInUnsatCore, 54 InterpolantComputations, 14 PerfectInterpolantSequences, 57/327 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 62 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-21 19:26:40,946 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-21 19:26:41,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abee25a3-0b9e-432c-876e-7f4d0466d62e/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...