./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.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_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/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_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/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_34a94826-fb48-4fa3-976e-30e809ab8d8c/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 d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 19:34:19,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:34:19,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:34:19,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:34:19,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:34:19,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:34:19,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:34:19,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:34:19,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:34:19,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:34:19,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:34:19,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:34:19,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:34:19,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:34:19,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:34:19,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:34:19,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:34:19,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:34:19,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:34:19,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:34:19,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:34:19,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:34:19,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:34:19,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:34:19,480 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:34:19,480 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:34:19,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:34:19,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:34:19,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:34:19,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:34:19,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:34:19,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:34:19,489 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:34:19,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:34:19,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:34:19,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:34:19,494 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:34:19,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:34:19,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:34:19,496 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:34:19,497 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:34:19,500 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:34:19,544 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:34:19,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:34:19,546 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:34:19,546 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:34:19,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:34:19,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:34:19,548 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:34:19,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:34:19,549 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:34:19,549 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:34:19,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:34:19,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:34:19,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:34:19,551 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:34:19,551 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:34:19,552 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:34:19,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:34:19,552 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:34:19,552 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:34:19,552 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:34:19,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:34:19,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:34:19,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:34:19,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:34:19,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:34:19,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:34:19,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:34:19,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:34:19,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:34:19,557 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_34a94826-fb48-4fa3-976e-30e809ab8d8c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d450427152972d80716d02c80706dd3b248a3fc7c05c71ffd29d66e32e1e82f2 [2021-10-21 19:34:19,859 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:34:19,896 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:34:19,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:34:19,900 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:34:19,901 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:34:19,902 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2021-10-21 19:34:19,984 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/data/5e4f13851/43c2184a0b3d45ec930c982e9bf3d771/FLAGe416cfc03 [2021-10-21 19:34:20,607 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:34:20,610 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2021-10-21 19:34:20,632 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/data/5e4f13851/43c2184a0b3d45ec930c982e9bf3d771/FLAGe416cfc03 [2021-10-21 19:34:20,873 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/data/5e4f13851/43c2184a0b3d45ec930c982e9bf3d771 [2021-10-21 19:34:20,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:34:20,880 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:34:20,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:34:20,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:34:20,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:34:20,889 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:34:20" (1/1) ... [2021-10-21 19:34:20,891 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46ce9b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:20, skipping insertion in model container [2021-10-21 19:34:20,891 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:34:20" (1/1) ... [2021-10-21 19:34:20,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:34:20,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:34:21,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:34:21,265 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:34:21,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:34:21,358 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:34:21,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:21 WrapperNode [2021-10-21 19:34:21,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:34:21,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:34:21,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:34:21,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:34:21,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:21" (1/1) ... [2021-10-21 19:34:21,376 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:21" (1/1) ... [2021-10-21 19:34:21,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:21" (1/1) ... [2021-10-21 19:34:21,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:21" (1/1) ... [2021-10-21 19:34:21,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:21" (1/1) ... [2021-10-21 19:34:21,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:21" (1/1) ... [2021-10-21 19:34:21,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:21" (1/1) ... [2021-10-21 19:34:21,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:34:21,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:34:21,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:34:21,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:34:21,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:21" (1/1) ... [2021-10-21 19:34:21,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:34:21,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:21,479 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:34:21,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:34:21,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:34:21,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:34:21,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-21 19:34:21,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-21 19:34:21,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-21 19:34:21,528 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-21 19:34:21,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-21 19:34:21,530 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrpbrk [2021-10-21 19:34:21,530 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:34:21,530 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-21 19:34:21,531 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-21 19:34:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-21 19:34:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-21 19:34:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-21 19:34:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-21 19:34:21,532 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-21 19:34:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-21 19:34:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-21 19:34:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-21 19:34:21,533 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-21 19:34:21,538 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-21 19:34:21,538 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-21 19:34:21,538 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-21 19:34:21,538 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-21 19:34:21,539 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-21 19:34:21,539 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-21 19:34:21,539 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-21 19:34:21,539 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-21 19:34:21,539 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-21 19:34:21,539 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-21 19:34:21,539 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-21 19:34:21,540 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-21 19:34:21,540 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-21 19:34:21,540 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-21 19:34:21,540 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-21 19:34:21,540 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-21 19:34:21,541 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-21 19:34:21,541 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-21 19:34:21,541 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-21 19:34:21,541 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-21 19:34:21,541 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-21 19:34:21,541 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-21 19:34:21,541 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-21 19:34:21,542 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-21 19:34:21,542 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-21 19:34:21,542 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-21 19:34:21,542 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-21 19:34:21,542 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-21 19:34:21,543 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-21 19:34:21,543 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-21 19:34:21,543 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-21 19:34:21,543 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-21 19:34:21,543 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-21 19:34:21,544 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-21 19:34:21,544 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-21 19:34:21,545 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-21 19:34:21,545 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-21 19:34:21,545 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-21 19:34:21,545 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-21 19:34:21,545 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-21 19:34:21,546 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-21 19:34:21,546 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-21 19:34:21,546 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-21 19:34:21,547 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-21 19:34:21,547 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-21 19:34:21,547 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-21 19:34:21,547 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-21 19:34:21,547 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-21 19:34:21,549 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-21 19:34:21,549 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-21 19:34:21,550 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-21 19:34:21,550 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-21 19:34:21,550 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-21 19:34:21,550 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-21 19:34:21,550 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-21 19:34:21,550 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-21 19:34:21,551 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-21 19:34:21,551 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-21 19:34:21,551 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-21 19:34:21,551 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-21 19:34:21,551 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-21 19:34:21,551 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-21 19:34:21,552 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-21 19:34:21,552 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-21 19:34:21,553 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-21 19:34:21,553 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-21 19:34:21,553 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-21 19:34:21,553 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-21 19:34:21,553 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-21 19:34:21,553 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-21 19:34:21,553 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-21 19:34:21,554 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-21 19:34:21,554 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-21 19:34:21,554 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-21 19:34:21,554 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-21 19:34:21,554 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-21 19:34:21,554 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-21 19:34:21,554 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-21 19:34:21,554 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-21 19:34:21,555 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-21 19:34:21,555 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-21 19:34:21,555 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-21 19:34:21,555 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-21 19:34:21,555 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-21 19:34:21,555 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-21 19:34:21,555 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-21 19:34:21,556 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-21 19:34:21,556 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-21 19:34:21,556 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-21 19:34:21,556 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-21 19:34:21,557 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-21 19:34:21,557 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-21 19:34:21,557 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-21 19:34:21,558 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-21 19:34:21,558 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-21 19:34:21,558 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-21 19:34:21,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-21 19:34:21,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-10-21 19:34:21,558 INFO L130 BoogieDeclarations]: Found specification of procedure cstrpbrk [2021-10-21 19:34:21,558 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:34:21,559 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:34:21,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:34:21,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:34:21,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:34:21,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:34:21,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:34:22,161 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:34:22,163 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-10-21 19:34:22,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:34:22 BoogieIcfgContainer [2021-10-21 19:34:22,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:34:22,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:34:22,173 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:34:22,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:34:22,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:34:20" (1/3) ... [2021-10-21 19:34:22,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8635f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:34:22, skipping insertion in model container [2021-10-21 19:34:22,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:34:21" (2/3) ... [2021-10-21 19:34:22,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d8635f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:34:22, skipping insertion in model container [2021-10-21 19:34:22,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:34:22" (3/3) ... [2021-10-21 19:34:22,183 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2021-10-21 19:34:22,195 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:34:22,196 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2021-10-21 19:34:22,249 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:34:22,258 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 19:34:22,258 INFO L340 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2021-10-21 19:34:22,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.75) internal successors, (56), 45 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-21 19:34:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:34:22,286 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:22,287 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:22,288 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:22,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:22,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1422603009, now seen corresponding path program 1 times [2021-10-21 19:34:22,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:22,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018896914] [2021-10-21 19:34:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:22,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:22,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:22,602 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 19:34:22,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:22,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018896914] [2021-10-21 19:34:22,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018896914] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:22,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:22,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:34:22,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350525274] [2021-10-21 19:34:22,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:34:22,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:22,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:34:22,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:34:22,646 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.75) internal successors, (56), 45 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:22,821 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-10-21 19:34:22,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:34:22,823 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 19:34:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:22,831 INFO L225 Difference]: With dead ends: 50 [2021-10-21 19:34:22,832 INFO L226 Difference]: Without dead ends: 47 [2021-10-21 19:34:22,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:34:22,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-21 19:34:22,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-21 19:34:22,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:22,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2021-10-21 19:34:22,876 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 11 [2021-10-21 19:34:22,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:22,877 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2021-10-21 19:34:22,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:22,878 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2021-10-21 19:34:22,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:34:22,878 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:22,879 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:22,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:34:22,879 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:22,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:22,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1422603008, now seen corresponding path program 1 times [2021-10-21 19:34:22,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:22,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978154673] [2021-10-21 19:34:22,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:22,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:23,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:23,028 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 19:34:23,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:23,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978154673] [2021-10-21 19:34:23,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978154673] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:23,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:23,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:34:23,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655214024] [2021-10-21 19:34:23,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:34:23,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:23,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:34:23,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:34:23,033 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:23,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:23,161 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2021-10-21 19:34:23,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:34:23,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-21 19:34:23,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:23,164 INFO L225 Difference]: With dead ends: 51 [2021-10-21 19:34:23,164 INFO L226 Difference]: Without dead ends: 51 [2021-10-21 19:34:23,165 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:34:23,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-21 19:34:23,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-10-21 19:34:23,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.5151515151515151) internal successors, (50), 43 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:23,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-10-21 19:34:23,181 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 11 [2021-10-21 19:34:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:23,182 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-10-21 19:34:23,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:23,207 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-10-21 19:34:23,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:34:23,208 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:23,208 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:23,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:34:23,209 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:23,209 INFO L82 PathProgramCache]: Analyzing trace with hash 973924227, now seen corresponding path program 1 times [2021-10-21 19:34:23,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:23,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218866769] [2021-10-21 19:34:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:23,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:23,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:23,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:23,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218866769] [2021-10-21 19:34:23,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218866769] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:23,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014538606] [2021-10-21 19:34:23,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:23,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:23,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:23,321 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:23,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:34:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:23,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:34:23,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:23,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014538606] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:23,641 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:34:23,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-10-21 19:34:23,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867707579] [2021-10-21 19:34:23,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:34:23,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:23,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:34:23,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:34:23,643 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:23,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:23,688 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2021-10-21 19:34:23,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:34:23,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-21 19:34:23,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:23,691 INFO L225 Difference]: With dead ends: 72 [2021-10-21 19:34:23,691 INFO L226 Difference]: Without dead ends: 72 [2021-10-21 19:34:23,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:34:23,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-21 19:34:23,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2021-10-21 19:34:23,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.45) internal successors, (58), 50 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:23,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-10-21 19:34:23,703 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 15 [2021-10-21 19:34:23,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:23,703 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-10-21 19:34:23,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:23,703 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-10-21 19:34:23,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:34:23,704 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:23,704 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:23,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:23,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:23,928 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:23,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1653982597, now seen corresponding path program 1 times [2021-10-21 19:34:23,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:23,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994969542] [2021-10-21 19:34:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:23,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:24,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:24,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:24,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994969542] [2021-10-21 19:34:24,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994969542] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:24,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60935836] [2021-10-21 19:34:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:24,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:24,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:24,044 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:24,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:34:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:24,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:34:24,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:24,229 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:34:24,230 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 19:34:24,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-21 19:34:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:24,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60935836] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:24,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:24,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-21 19:34:24,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951358097] [2021-10-21 19:34:24,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:34:24,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:24,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:34:24,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:34:24,323 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 19:34:24,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:24,465 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2021-10-21 19:34:24,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:34:24,465 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 19:34:24,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:24,466 INFO L225 Difference]: With dead ends: 57 [2021-10-21 19:34:24,467 INFO L226 Difference]: Without dead ends: 57 [2021-10-21 19:34:24,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:34:24,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-21 19:34:24,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-10-21 19:34:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.435897435897436) internal successors, (56), 48 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2021-10-21 19:34:24,492 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 15 [2021-10-21 19:34:24,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:24,493 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2021-10-21 19:34:24,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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 19:34:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2021-10-21 19:34:24,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 19:34:24,494 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:24,494 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:24,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:24,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:24,695 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:24,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:24,695 INFO L82 PathProgramCache]: Analyzing trace with hash -361738470, now seen corresponding path program 1 times [2021-10-21 19:34:24,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:24,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96274045] [2021-10-21 19:34:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:24,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:24,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:24,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:24,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96274045] [2021-10-21 19:34:24,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96274045] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:24,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:24,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:34:24,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104299474] [2021-10-21 19:34:24,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:34:24,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:24,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:34:24,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:34:24,760 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:24,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:24,888 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-10-21 19:34:24,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:34:24,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-21 19:34:24,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:24,893 INFO L225 Difference]: With dead ends: 60 [2021-10-21 19:34:24,893 INFO L226 Difference]: Without dead ends: 60 [2021-10-21 19:34:24,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:34:24,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-21 19:34:24,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-10-21 19:34:24,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.425) internal successors, (57), 49 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:24,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2021-10-21 19:34:24,910 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 17 [2021-10-21 19:34:24,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:24,911 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2021-10-21 19:34:24,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:24,911 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2021-10-21 19:34:24,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 19:34:24,912 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:24,913 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:24,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:34:24,913 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:24,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:24,914 INFO L82 PathProgramCache]: Analyzing trace with hash -361738418, now seen corresponding path program 1 times [2021-10-21 19:34:24,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:24,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3705347] [2021-10-21 19:34:24,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:24,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:24,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:24,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:24,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3705347] [2021-10-21 19:34:24,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3705347] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:24,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:24,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:34:24,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532060443] [2021-10-21 19:34:24,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:34:24,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:24,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:34:24,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:34:24,965 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:25,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:25,042 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2021-10-21 19:34:25,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:34:25,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-21 19:34:25,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:25,044 INFO L225 Difference]: With dead ends: 53 [2021-10-21 19:34:25,044 INFO L226 Difference]: Without dead ends: 53 [2021-10-21 19:34:25,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:34:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-21 19:34:25,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-10-21 19:34:25,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 40 states have (on average 1.375) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-10-21 19:34:25,049 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2021-10-21 19:34:25,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:25,049 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-10-21 19:34:25,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:25,050 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-10-21 19:34:25,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 19:34:25,050 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:25,051 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:25,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-21 19:34:25,051 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:25,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:25,052 INFO L82 PathProgramCache]: Analyzing trace with hash -361738417, now seen corresponding path program 1 times [2021-10-21 19:34:25,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:25,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205646922] [2021-10-21 19:34:25,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:25,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:25,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:25,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:25,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:25,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205646922] [2021-10-21 19:34:25,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205646922] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:25,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:25,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:34:25,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400782361] [2021-10-21 19:34:25,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:34:25,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:25,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:34:25,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:34:25,159 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:25,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:25,264 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2021-10-21 19:34:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:34:25,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-10-21 19:34:25,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:25,266 INFO L225 Difference]: With dead ends: 55 [2021-10-21 19:34:25,266 INFO L226 Difference]: Without dead ends: 55 [2021-10-21 19:34:25,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:34:25,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-21 19:34:25,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-10-21 19:34:25,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-10-21 19:34:25,286 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 17 [2021-10-21 19:34:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:25,286 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-10-21 19:34:25,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:25,287 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-10-21 19:34:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:34:25,288 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:25,288 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:25,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:34:25,288 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:25,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:25,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1877401955, now seen corresponding path program 1 times [2021-10-21 19:34:25,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:25,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577317246] [2021-10-21 19:34:25,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:25,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:25,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:25,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:25,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577317246] [2021-10-21 19:34:25,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577317246] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:25,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221856350] [2021-10-21 19:34:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:25,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:25,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:25,449 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:25,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:34:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:25,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:34:25,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:25,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221856350] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:25,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:25,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2021-10-21 19:34:25,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619715190] [2021-10-21 19:34:25,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:34:25,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:25,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:34:25,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:34:25,857 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 19:34:26,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:26,067 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2021-10-21 19:34:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:34:26,068 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 21 [2021-10-21 19:34:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:26,069 INFO L225 Difference]: With dead ends: 67 [2021-10-21 19:34:26,069 INFO L226 Difference]: Without dead ends: 67 [2021-10-21 19:34:26,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:34:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-21 19:34:26,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-10-21 19:34:26,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 55 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:26,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-10-21 19:34:26,083 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 21 [2021-10-21 19:34:26,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:26,084 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-10-21 19:34:26,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 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 19:34:26,084 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-10-21 19:34:26,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:34:26,085 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:26,085 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:26,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:26,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-21 19:34:26,300 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:26,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:26,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1877401902, now seen corresponding path program 1 times [2021-10-21 19:34:26,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:26,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646789616] [2021-10-21 19:34:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:26,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:26,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:26,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:26,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646789616] [2021-10-21 19:34:26,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646789616] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:26,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141841658] [2021-10-21 19:34:26,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:26,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:26,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:26,356 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:26,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:34:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:26,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:34:26,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:26,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141841658] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:26,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:34:26,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-10-21 19:34:26,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692492052] [2021-10-21 19:34:26,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:34:26,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:26,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:34:26,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:34:26,650 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:26,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:26,675 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2021-10-21 19:34:26,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:34:26,675 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 19:34:26,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:26,676 INFO L225 Difference]: With dead ends: 93 [2021-10-21 19:34:26,676 INFO L226 Difference]: Without dead ends: 93 [2021-10-21 19:34:26,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:34:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-21 19:34:26,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 85. [2021-10-21 19:34:26,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 79 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2021-10-21 19:34:26,681 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 21 [2021-10-21 19:34:26,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:26,682 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2021-10-21 19:34:26,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:26,682 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2021-10-21 19:34:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:34:26,683 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:26,683 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:26,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:26,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:26,907 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:26,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1406448144, now seen corresponding path program 1 times [2021-10-21 19:34:26,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:26,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061008691] [2021-10-21 19:34:26,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:26,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:26,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:26,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:26,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061008691] [2021-10-21 19:34:26,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061008691] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:26,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446742314] [2021-10-21 19:34:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:26,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:26,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:27,000 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:27,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:34:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:27,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:34:27,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:27,198 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:34:27,198 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:34:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:27,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446742314] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:27,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:27,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-21 19:34:27,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366644869] [2021-10-21 19:34:27,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:34:27,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:27,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:34:27,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:34:27,333 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 19:34:27,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:27,448 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2021-10-21 19:34:27,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:34:27,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 21 [2021-10-21 19:34:27,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:27,449 INFO L225 Difference]: With dead ends: 88 [2021-10-21 19:34:27,450 INFO L226 Difference]: Without dead ends: 88 [2021-10-21 19:34:27,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:34:27,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-21 19:34:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2021-10-21 19:34:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 76 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2021-10-21 19:34:27,454 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 21 [2021-10-21 19:34:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:27,455 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2021-10-21 19:34:27,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 19:34:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2021-10-21 19:34:27,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:34:27,456 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:27,456 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:27,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:27,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:27,666 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:27,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:27,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1137701663, now seen corresponding path program 1 times [2021-10-21 19:34:27,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:27,687 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495604871] [2021-10-21 19:34:27,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:27,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:27,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:27,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:27,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:27,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495604871] [2021-10-21 19:34:27,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495604871] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:27,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:27,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:34:27,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345136246] [2021-10-21 19:34:27,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:34:27,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:27,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:34:27,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:34:27,788 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:27,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:27,906 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2021-10-21 19:34:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:34:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-21 19:34:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:27,907 INFO L225 Difference]: With dead ends: 81 [2021-10-21 19:34:27,907 INFO L226 Difference]: Without dead ends: 81 [2021-10-21 19:34:27,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:34:27,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-21 19:34:27,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 68. [2021-10-21 19:34:27,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 62 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:27,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-10-21 19:34:27,912 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 21 [2021-10-21 19:34:27,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:27,912 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-10-21 19:34:27,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:27,913 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-10-21 19:34:27,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:34:27,914 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:27,914 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:27,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-21 19:34:27,915 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:27,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:27,915 INFO L82 PathProgramCache]: Analyzing trace with hash -684951934, now seen corresponding path program 1 times [2021-10-21 19:34:27,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:27,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875125025] [2021-10-21 19:34:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:27,916 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:28,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:28,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:28,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:28,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875125025] [2021-10-21 19:34:28,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875125025] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:28,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523537099] [2021-10-21 19:34:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:28,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:28,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:28,024 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:28,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:34:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:28,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:34:28,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:28,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523537099] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:28,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:28,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-10-21 19:34:28,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997815567] [2021-10-21 19:34:28,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-21 19:34:28,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:28,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-21 19:34:28,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:34:28,381 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:28,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:28,621 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-10-21 19:34:28,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:34:28,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-21 19:34:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:28,623 INFO L225 Difference]: With dead ends: 79 [2021-10-21 19:34:28,623 INFO L226 Difference]: Without dead ends: 79 [2021-10-21 19:34:28,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:34:28,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-21 19:34:28,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2021-10-21 19:34:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 60 states have (on average 1.2333333333333334) internal successors, (74), 64 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-10-21 19:34:28,626 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 26 [2021-10-21 19:34:28,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:28,627 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-10-21 19:34:28,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:28,627 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-10-21 19:34:28,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:34:28,628 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:28,628 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:28,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:28,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 19:34:28,840 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrpbrkErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:28,840 INFO L82 PathProgramCache]: Analyzing trace with hash -684951935, now seen corresponding path program 1 times [2021-10-21 19:34:28,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:28,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727953902] [2021-10-21 19:34:28,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:28,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:28,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:28,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:28,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727953902] [2021-10-21 19:34:28,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727953902] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:28,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:28,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:34:28,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115160519] [2021-10-21 19:34:28,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:34:28,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:28,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:34:28,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:34:28,902 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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 19:34:29,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:29,020 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-10-21 19:34:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:34:29,021 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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 26 [2021-10-21 19:34:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:29,022 INFO L225 Difference]: With dead ends: 69 [2021-10-21 19:34:29,022 INFO L226 Difference]: Without dead ends: 69 [2021-10-21 19:34:29,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:34:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-21 19:34:29,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-21 19:34:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.2) internal successors, (72), 63 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:29,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2021-10-21 19:34:29,051 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 26 [2021-10-21 19:34:29,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:29,052 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2021-10-21 19:34:29,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 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 19:34:29,052 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2021-10-21 19:34:29,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:34:29,053 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:29,054 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:29,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-21 19:34:29,054 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrpbrkErr2REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:29,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:29,055 INFO L82 PathProgramCache]: Analyzing trace with hash -418036057, now seen corresponding path program 1 times [2021-10-21 19:34:29,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:29,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755112552] [2021-10-21 19:34:29,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:29,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:29,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:29,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:29,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755112552] [2021-10-21 19:34:29,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755112552] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:29,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:29,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:34:29,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855327491] [2021-10-21 19:34:29,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:34:29,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:29,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:34:29,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:34:29,124 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 19:34:29,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:29,281 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-10-21 19:34:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:34:29,282 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 30 [2021-10-21 19:34:29,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:29,284 INFO L225 Difference]: With dead ends: 73 [2021-10-21 19:34:29,285 INFO L226 Difference]: Without dead ends: 73 [2021-10-21 19:34:29,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:34:29,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-21 19:34:29,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2021-10-21 19:34:29,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 62 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:29,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-10-21 19:34:29,289 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 30 [2021-10-21 19:34:29,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:29,289 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-10-21 19:34:29,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 19:34:29,290 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-10-21 19:34:29,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:34:29,291 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:29,291 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:29,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-21 19:34:29,292 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:29,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:29,292 INFO L82 PathProgramCache]: Analyzing trace with hash -418036056, now seen corresponding path program 1 times [2021-10-21 19:34:29,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:29,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721170513] [2021-10-21 19:34:29,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:29,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:29,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:34:29,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:29,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721170513] [2021-10-21 19:34:29,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721170513] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:29,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:29,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-21 19:34:29,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109913881] [2021-10-21 19:34:29,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:34:29,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:29,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:34:29,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:34:29,408 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand has 10 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 19:34:29,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:29,614 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2021-10-21 19:34:29,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:34:29,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 30 [2021-10-21 19:34:29,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:29,616 INFO L225 Difference]: With dead ends: 72 [2021-10-21 19:34:29,616 INFO L226 Difference]: Without dead ends: 72 [2021-10-21 19:34:29,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:34:29,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-21 19:34:29,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-10-21 19:34:29,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.1774193548387097) internal successors, (73), 64 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2021-10-21 19:34:29,620 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 30 [2021-10-21 19:34:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:29,620 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2021-10-21 19:34:29,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 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 19:34:29,620 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2021-10-21 19:34:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 19:34:29,621 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:29,621 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:29,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-21 19:34:29,622 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:29,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:29,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1655830610, now seen corresponding path program 1 times [2021-10-21 19:34:29,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:29,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636625059] [2021-10-21 19:34:29,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:29,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:29,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:29,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:29,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-10-21 19:34:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:29,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:34:29,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:29,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636625059] [2021-10-21 19:34:29,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636625059] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:29,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:29,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:34:29,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136846559] [2021-10-21 19:34:29,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:34:29,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:29,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:34:29,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:34:29,710 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:29,755 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-10-21 19:34:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:34:29,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-10-21 19:34:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:29,756 INFO L225 Difference]: With dead ends: 69 [2021-10-21 19:34:29,756 INFO L226 Difference]: Without dead ends: 64 [2021-10-21 19:34:29,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:34:29,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-21 19:34:29,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-21 19:34:29,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 59 states have internal predecessors, (67), 3 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 19:34:29,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2021-10-21 19:34:29,760 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 33 [2021-10-21 19:34:29,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:29,760 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2021-10-21 19:34:29,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-21 19:34:29,760 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2021-10-21 19:34:29,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 19:34:29,761 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:29,761 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:29,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-21 19:34:29,762 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:29,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:29,762 INFO L82 PathProgramCache]: Analyzing trace with hash 942908492, now seen corresponding path program 1 times [2021-10-21 19:34:29,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:29,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009507631] [2021-10-21 19:34:29,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:29,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:29,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:34:29,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:29,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009507631] [2021-10-21 19:34:29,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009507631] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:29,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:29,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-21 19:34:29,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946247928] [2021-10-21 19:34:29,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:34:29,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:29,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:34:29,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:34:29,944 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 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 19:34:30,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:30,185 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-10-21 19:34:30,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:34:30,186 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 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 34 [2021-10-21 19:34:30,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:30,187 INFO L225 Difference]: With dead ends: 84 [2021-10-21 19:34:30,187 INFO L226 Difference]: Without dead ends: 51 [2021-10-21 19:34:30,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:34:30,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-21 19:34:30,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-21 19:34:30,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 46 states have internal predecessors, (52), 3 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 19:34:30,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2021-10-21 19:34:30,189 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 34 [2021-10-21 19:34:30,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:30,190 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2021-10-21 19:34:30,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 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 19:34:30,190 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2021-10-21 19:34:30,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 19:34:30,191 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:30,191 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:30,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 19:34:30,191 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:30,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:30,191 INFO L82 PathProgramCache]: Analyzing trace with hash 433435402, now seen corresponding path program 1 times [2021-10-21 19:34:30,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:30,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543969401] [2021-10-21 19:34:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:30,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:30,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:30,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:30,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543969401] [2021-10-21 19:34:30,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543969401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:30,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814210096] [2021-10-21 19:34:30,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:30,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:30,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:30,438 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:30,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:34:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:30,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-21 19:34:30,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:30,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 19:34:30,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 19:34:31,017 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-21 19:34:31,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-21 19:34:31,477 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-21 19:34:31,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 32 [2021-10-21 19:34:31,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:31,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814210096] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:31,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:31,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-10-21 19:34:31,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13329817] [2021-10-21 19:34:31,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 19:34:31,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:31,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 19:34:31,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:34:31,510 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 21 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:32,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:32,248 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2021-10-21 19:34:32,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:34:32,248 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-10-21 19:34:32,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:32,249 INFO L225 Difference]: With dead ends: 85 [2021-10-21 19:34:32,249 INFO L226 Difference]: Without dead ends: 65 [2021-10-21 19:34:32,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 748.6ms TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:34:32,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-21 19:34:32,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2021-10-21 19:34:32,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 54 states have internal predecessors, (60), 3 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 19:34:32,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-10-21 19:34:32,252 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 34 [2021-10-21 19:34:32,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:32,253 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-10-21 19:34:32,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.4) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:32,253 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-10-21 19:34:32,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-21 19:34:32,254 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:32,254 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 19:34:32,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:32,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:34:32,480 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:32,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:32,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1542789593, now seen corresponding path program 2 times [2021-10-21 19:34:32,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:32,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183799519] [2021-10-21 19:34:32,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:32,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:32,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:32,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:32,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183799519] [2021-10-21 19:34:32,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183799519] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:32,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223587217] [2021-10-21 19:34:32,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:34:32,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:32,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:32,632 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:32,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:34:32,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:34:32,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:34:32,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-21 19:34:32,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:33,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223587217] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:33,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:33,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-21 19:34:33,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015367443] [2021-10-21 19:34:33,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-21 19:34:33,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:33,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:34:33,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:34:33,146 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:33,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:33,516 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-10-21 19:34:33,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:34:33,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-10-21 19:34:33,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:33,517 INFO L225 Difference]: With dead ends: 75 [2021-10-21 19:34:33,520 INFO L226 Difference]: Without dead ends: 75 [2021-10-21 19:34:33,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:34:33,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-21 19:34:33,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2021-10-21 19:34:33,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.140625) internal successors, (73), 65 states have internal predecessors, (73), 3 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 19:34:33,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2021-10-21 19:34:33,530 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 38 [2021-10-21 19:34:33,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:33,531 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2021-10-21 19:34:33,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 15 states have internal predecessors, (56), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:33,531 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2021-10-21 19:34:33,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 19:34:33,533 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:33,533 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 19:34:33,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:33,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:33,756 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:33,757 INFO L82 PathProgramCache]: Analyzing trace with hash -581752220, now seen corresponding path program 1 times [2021-10-21 19:34:33,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:33,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867642340] [2021-10-21 19:34:33,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:33,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:33,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:33,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:34:33,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:33,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867642340] [2021-10-21 19:34:33,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867642340] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:34:33,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:34:33,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-21 19:34:33,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100225056] [2021-10-21 19:34:33,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:34:33,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:33,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:34:33,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:34:33,944 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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 19:34:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:34,297 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2021-10-21 19:34:34,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:34:34,297 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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 39 [2021-10-21 19:34:34,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:34,298 INFO L225 Difference]: With dead ends: 94 [2021-10-21 19:34:34,298 INFO L226 Difference]: Without dead ends: 94 [2021-10-21 19:34:34,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:34:34,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-21 19:34:34,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2021-10-21 19:34:34,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 86 states have internal predecessors, (95), 4 states have call successors, (4), 4 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 19:34:34,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-10-21 19:34:34,302 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 39 [2021-10-21 19:34:34,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:34,303 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-10-21 19:34:34,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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 19:34:34,303 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-10-21 19:34:34,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-21 19:34:34,305 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:34,305 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 19:34:34,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-21 19:34:34,306 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:34,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:34,306 INFO L82 PathProgramCache]: Analyzing trace with hash -306992606, now seen corresponding path program 1 times [2021-10-21 19:34:34,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:34,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825032649] [2021-10-21 19:34:34,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:34,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:34,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:34,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:34,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:34:34,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:34,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825032649] [2021-10-21 19:34:34,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825032649] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:34,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332889609] [2021-10-21 19:34:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:34,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:34,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:34,588 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:34,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:34:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:34,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-21 19:34:34,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:34,946 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 19:34:35,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-21 19:34:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:34:35,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332889609] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:35,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:35,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 19 [2021-10-21 19:34:35,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187758019] [2021-10-21 19:34:35,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:34:35,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:35,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:34:35,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:34:35,055 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:35,665 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2021-10-21 19:34:35,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-21 19:34:35,665 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-10-21 19:34:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:35,667 INFO L225 Difference]: With dead ends: 123 [2021-10-21 19:34:35,667 INFO L226 Difference]: Without dead ends: 123 [2021-10-21 19:34:35,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 460.8ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:34:35,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-21 19:34:35,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-10-21 19:34:35,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 90 states have internal predecessors, (100), 4 states have call successors, (4), 4 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 19:34:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-10-21 19:34:35,671 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 39 [2021-10-21 19:34:35,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:35,672 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-10-21 19:34:35,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:35,672 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-10-21 19:34:35,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 19:34:35,673 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:35,673 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:35,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:35,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-21 19:34:35,888 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:35,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:35,888 INFO L82 PathProgramCache]: Analyzing trace with hash 149054821, now seen corresponding path program 2 times [2021-10-21 19:34:35,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:35,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075178162] [2021-10-21 19:34:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:35,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:36,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:36,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:34:36,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:36,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075178162] [2021-10-21 19:34:36,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075178162] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:36,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074697181] [2021-10-21 19:34:36,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:34:36,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:36,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:36,076 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:36,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:34:36,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:34:36,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:34:36,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-21 19:34:36,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:34:36,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074697181] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:36,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:36,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2021-10-21 19:34:36,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54435461] [2021-10-21 19:34:36,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-21 19:34:36,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:36,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-21 19:34:36,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:34:36,586 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 22 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:37,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:37,165 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2021-10-21 19:34:37,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:34:37,168 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-10-21 19:34:37,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:37,170 INFO L225 Difference]: With dead ends: 118 [2021-10-21 19:34:37,170 INFO L226 Difference]: Without dead ends: 118 [2021-10-21 19:34:37,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 375.8ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:34:37,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-21 19:34:37,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2021-10-21 19:34:37,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 100 states have internal predecessors, (112), 4 states have call successors, (4), 4 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 19:34:37,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2021-10-21 19:34:37,175 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 43 [2021-10-21 19:34:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:37,175 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2021-10-21 19:34:37,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:37,175 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2021-10-21 19:34:37,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:34:37,176 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:37,176 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:37,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:37,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:37,396 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:37,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:37,396 INFO L82 PathProgramCache]: Analyzing trace with hash -2091999503, now seen corresponding path program 3 times [2021-10-21 19:34:37,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:37,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317426359] [2021-10-21 19:34:37,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:37,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:37,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:37,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:37,860 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:37,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:37,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317426359] [2021-10-21 19:34:37,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317426359] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:37,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632161538] [2021-10-21 19:34:37,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:34:37,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:37,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:37,875 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:37,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:34:38,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:34:38,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:34:38,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-21 19:34:38,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:38,178 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:34:38,178 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:34:38,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-10-21 19:34:38,847 INFO L354 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2021-10-21 19:34:38,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 42 [2021-10-21 19:34:40,866 INFO L354 Elim1Store]: treesize reduction 44, result has 6.4 percent of original size [2021-10-21 19:34:40,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 45 [2021-10-21 19:34:40,888 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:40,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632161538] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:40,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:40,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-10-21 19:34:40,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281550540] [2021-10-21 19:34:40,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-21 19:34:40,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:40,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-21 19:34:40,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2021-10-21 19:34:40,891 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 30 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:42,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:42,418 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2021-10-21 19:34:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:34:42,419 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-10-21 19:34:42,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:42,420 INFO L225 Difference]: With dead ends: 138 [2021-10-21 19:34:42,420 INFO L226 Difference]: Without dead ends: 116 [2021-10-21 19:34:42,421 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1581.0ms TimeCoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2021-10-21 19:34:42,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-21 19:34:42,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2021-10-21 19:34:42,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 103 states have (on average 1.1262135922330097) internal successors, (116), 104 states have internal predecessors, (116), 4 states have call successors, (4), 4 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 19:34:42,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-10-21 19:34:42,426 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 46 [2021-10-21 19:34:42,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:42,426 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-10-21 19:34:42,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:42,427 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-10-21 19:34:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:34:42,428 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:42,428 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:42,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:42,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:42,644 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:42,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:42,644 INFO L82 PathProgramCache]: Analyzing trace with hash 357600627, now seen corresponding path program 1 times [2021-10-21 19:34:42,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:42,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195418465] [2021-10-21 19:34:42,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:42,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:43,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:43,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:43,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195418465] [2021-10-21 19:34:43,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195418465] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:43,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17410331] [2021-10-21 19:34:43,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:43,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:43,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:43,213 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:43,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:34:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:43,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-21 19:34:43,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:43,597 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:34:43,598 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:34:44,069 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 19:34:44,168 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-10-21 19:34:44,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-21 19:34:45,210 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-10-21 19:34:45,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 40 [2021-10-21 19:34:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:45,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17410331] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:45,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:45,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2021-10-21 19:34:45,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429426396] [2021-10-21 19:34:45,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-21 19:34:45,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:45,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-21 19:34:45,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 19:34:45,247 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:47,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:47,584 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2021-10-21 19:34:47,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:34:47,584 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-10-21 19:34:47,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:47,585 INFO L225 Difference]: With dead ends: 152 [2021-10-21 19:34:47,585 INFO L226 Difference]: Without dead ends: 136 [2021-10-21 19:34:47,586 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 2448.4ms TimeCoverageRelationStatistics Valid=353, Invalid=3187, Unknown=0, NotChecked=0, Total=3540 [2021-10-21 19:34:47,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-21 19:34:47,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2021-10-21 19:34:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 113 states have (on average 1.1238938053097345) internal successors, (127), 114 states have internal predecessors, (127), 4 states have call successors, (4), 4 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 19:34:47,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2021-10-21 19:34:47,590 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 46 [2021-10-21 19:34:47,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:47,591 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2021-10-21 19:34:47,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:47,591 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2021-10-21 19:34:47,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-21 19:34:47,592 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:47,592 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:47,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-10-21 19:34:47,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:47,800 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:47,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:47,800 INFO L82 PathProgramCache]: Analyzing trace with hash 947634242, now seen corresponding path program 3 times [2021-10-21 19:34:47,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:47,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679373865] [2021-10-21 19:34:47,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:47,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:48,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:34:48,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:48,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679373865] [2021-10-21 19:34:48,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679373865] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:48,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541363178] [2021-10-21 19:34:48,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:34:48,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:48,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:48,091 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:48,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:34:48,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:34:48,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:34:48,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-21 19:34:48,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:48,675 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 19:34:49,007 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-10-21 19:34:49,007 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 24 treesize of output 16 [2021-10-21 19:34:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:34:49,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541363178] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:49,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:49,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2021-10-21 19:34:49,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244744360] [2021-10-21 19:34:49,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-21 19:34:49,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:49,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-21 19:34:49,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:34:49,020 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 29 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:50,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:50,064 INFO L93 Difference]: Finished difference Result 167 states and 182 transitions. [2021-10-21 19:34:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:34:50,064 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-10-21 19:34:50,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:50,065 INFO L225 Difference]: With dead ends: 167 [2021-10-21 19:34:50,065 INFO L226 Difference]: Without dead ends: 167 [2021-10-21 19:34:50,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 801.0ms TimeCoverageRelationStatistics Valid=274, Invalid=1888, Unknown=0, NotChecked=0, Total=2162 [2021-10-21 19:34:50,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-10-21 19:34:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 156. [2021-10-21 19:34:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 149 states have internal predecessors, (166), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:50,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 172 transitions. [2021-10-21 19:34:50,071 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 172 transitions. Word has length 48 [2021-10-21 19:34:50,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:50,071 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 172 transitions. [2021-10-21 19:34:50,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 26 states have internal predecessors, (71), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:50,072 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 172 transitions. [2021-10-21 19:34:50,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-21 19:34:50,073 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:50,073 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:50,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:50,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 19:34:50,288 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:50,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:50,288 INFO L82 PathProgramCache]: Analyzing trace with hash -2061037938, now seen corresponding path program 4 times [2021-10-21 19:34:50,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:50,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009650691] [2021-10-21 19:34:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:50,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:50,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:50,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:50,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009650691] [2021-10-21 19:34:50,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009650691] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:50,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781800378] [2021-10-21 19:34:50,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:34:50,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:50,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:50,464 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:50,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:34:50,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:34:50,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:34:50,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-21 19:34:50,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:34:51,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781800378] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:51,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:51,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2021-10-21 19:34:51,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944291255] [2021-10-21 19:34:51,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:34:51,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:51,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:34:51,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:34:51,128 INFO L87 Difference]: Start difference. First operand 156 states and 172 transitions. Second operand has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:51,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:51,566 INFO L93 Difference]: Finished difference Result 283 states and 311 transitions. [2021-10-21 19:34:51,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:34:51,566 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-10-21 19:34:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:51,567 INFO L225 Difference]: With dead ends: 283 [2021-10-21 19:34:51,568 INFO L226 Difference]: Without dead ends: 283 [2021-10-21 19:34:51,568 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 278.8ms TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:34:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-10-21 19:34:51,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 209. [2021-10-21 19:34:51,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 199 states have (on average 1.120603015075377) internal successors, (223), 200 states have internal predecessors, (223), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:51,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 231 transitions. [2021-10-21 19:34:51,575 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 231 transitions. Word has length 50 [2021-10-21 19:34:51,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:51,576 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 231 transitions. [2021-10-21 19:34:51,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:51,576 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 231 transitions. [2021-10-21 19:34:51,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-21 19:34:51,578 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:51,578 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:51,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-21 19:34:51,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-21 19:34:51,784 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:51,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:51,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1444425936, now seen corresponding path program 2 times [2021-10-21 19:34:51,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:51,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217570338] [2021-10-21 19:34:51,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:51,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:51,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:52,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:34:52,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:52,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217570338] [2021-10-21 19:34:52,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217570338] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:52,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985643353] [2021-10-21 19:34:52,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:34:52,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:52,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:52,164 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:52,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:34:52,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:34:52,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:34:52,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-21 19:34:52,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:52,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 19:34:53,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 19:34:53,177 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-21 19:34:53,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-21 19:34:54,078 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-21 19:34:54,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 34 [2021-10-21 19:34:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:34:54,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985643353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:54,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:54,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2021-10-21 19:34:54,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434070922] [2021-10-21 19:34:54,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-21 19:34:54,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:54,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-21 19:34:54,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:34:54,107 INFO L87 Difference]: Start difference. First operand 209 states and 231 transitions. Second operand has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:55,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:55,324 INFO L93 Difference]: Finished difference Result 253 states and 276 transitions. [2021-10-21 19:34:55,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:34:55,325 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-10-21 19:34:55,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:55,326 INFO L225 Difference]: With dead ends: 253 [2021-10-21 19:34:55,326 INFO L226 Difference]: Without dead ends: 228 [2021-10-21 19:34:55,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1253.7ms TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 19:34:55,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-10-21 19:34:55,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2021-10-21 19:34:55,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 212 states have (on average 1.1132075471698113) internal successors, (236), 213 states have internal predecessors, (236), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:55,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 243 transitions. [2021-10-21 19:34:55,334 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 243 transitions. Word has length 50 [2021-10-21 19:34:55,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:55,334 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 243 transitions. [2021-10-21 19:34:55,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:55,335 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 243 transitions. [2021-10-21 19:34:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-21 19:34:55,336 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:55,336 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:55,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-21 19:34:55,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 19:34:55,553 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:55,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:55,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1709703263, now seen corresponding path program 4 times [2021-10-21 19:34:55,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:55,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578594816] [2021-10-21 19:34:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:55,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:55,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:34:55,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:55,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578594816] [2021-10-21 19:34:55,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578594816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:55,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691611779] [2021-10-21 19:34:55,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:34:55,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:55,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:55,796 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:55,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:34:56,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:34:56,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:34:56,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-21 19:34:56,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:34:56,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691611779] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:56,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:34:56,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-10-21 19:34:56,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437850964] [2021-10-21 19:34:56,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-21 19:34:56,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:34:56,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-21 19:34:56,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:34:56,693 INFO L87 Difference]: Start difference. First operand 221 states and 243 transitions. Second operand has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:57,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:34:57,257 INFO L93 Difference]: Finished difference Result 272 states and 299 transitions. [2021-10-21 19:34:57,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:34:57,257 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-10-21 19:34:57,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:34:57,259 INFO L225 Difference]: With dead ends: 272 [2021-10-21 19:34:57,260 INFO L226 Difference]: Without dead ends: 272 [2021-10-21 19:34:57,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 370.5ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:34:57,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-21 19:34:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 241. [2021-10-21 19:34:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 232 states have (on average 1.1163793103448276) internal successors, (259), 233 states have internal predecessors, (259), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:57,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 266 transitions. [2021-10-21 19:34:57,269 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 266 transitions. Word has length 52 [2021-10-21 19:34:57,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:34:57,269 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 266 transitions. [2021-10-21 19:34:57,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 3.3636363636363638) internal successors, (74), 21 states have internal predecessors, (74), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:34:57,269 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 266 transitions. [2021-10-21 19:34:57,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-21 19:34:57,270 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:34:57,271 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:34:57,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:34:57,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-21 19:34:57,496 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:34:57,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:34:57,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1417547384, now seen corresponding path program 5 times [2021-10-21 19:34:57,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:34:57,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016565609] [2021-10-21 19:34:57,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:34:57,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:34:57,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:58,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:34:58,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:34:58,384 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:34:58,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:34:58,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016565609] [2021-10-21 19:34:58,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016565609] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:34:58,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747905846] [2021-10-21 19:34:58,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:34:58,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:34:58,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:34:58,386 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:34:58,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:34:58,987 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-21 19:34:58,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:34:58,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-21 19:34:58,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:34:59,020 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:34:59,020 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:34:59,391 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 19:34:59,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:34:59,847 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 19 treesize of output 19 [2021-10-21 19:35:00,068 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:35:00,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747905846] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:00,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:35:00,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17] total 41 [2021-10-21 19:35:00,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429953520] [2021-10-21 19:35:00,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-21 19:35:00,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:35:00,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-21 19:35:00,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1541, Unknown=0, NotChecked=0, Total=1640 [2021-10-21 19:35:00,071 INFO L87 Difference]: Start difference. First operand 241 states and 266 transitions. Second operand has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:35:03,750 INFO L93 Difference]: Finished difference Result 338 states and 368 transitions. [2021-10-21 19:35:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-21 19:35:03,751 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-10-21 19:35:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:35:03,753 INFO L225 Difference]: With dead ends: 338 [2021-10-21 19:35:03,753 INFO L226 Difference]: Without dead ends: 316 [2021-10-21 19:35:03,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 3202.5ms TimeCoverageRelationStatistics Valid=554, Invalid=6088, Unknown=0, NotChecked=0, Total=6642 [2021-10-21 19:35:03,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-10-21 19:35:03,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 265. [2021-10-21 19:35:03,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 256 states have (on average 1.1171875) internal successors, (286), 257 states have internal predecessors, (286), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:03,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 293 transitions. [2021-10-21 19:35:03,765 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 293 transitions. Word has length 57 [2021-10-21 19:35:03,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:35:03,766 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 293 transitions. [2021-10-21 19:35:03,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.5128205128205128) internal successors, (98), 38 states have internal predecessors, (98), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 293 transitions. [2021-10-21 19:35:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-21 19:35:03,767 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:35:03,768 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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] [2021-10-21 19:35:03,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:35:03,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 19:35:03,988 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:35:03,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:35:03,988 INFO L82 PathProgramCache]: Analyzing trace with hash -515149736, now seen corresponding path program 5 times [2021-10-21 19:35:03,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:35:03,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414455100] [2021-10-21 19:35:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:03,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:35:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:04,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:35:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:04,356 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:35:04,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:35:04,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414455100] [2021-10-21 19:35:04,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414455100] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:04,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705569188] [2021-10-21 19:35:04,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:35:04,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:04,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:35:04,358 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:35:04,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:35:04,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-21 19:35:04,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:35:04,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 90 conjunts are in the unsatisfiable core [2021-10-21 19:35:04,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:35:05,053 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:35:05,053 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:35:05,878 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 30 treesize of output 26 [2021-10-21 19:35:06,001 INFO L354 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2021-10-21 19:35:06,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-10-21 19:35:06,693 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-21 19:35:06,693 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 55 treesize of output 43 [2021-10-21 19:35:07,237 INFO L354 Elim1Store]: treesize reduction 35, result has 18.6 percent of original size [2021-10-21 19:35:07,237 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 27 [2021-10-21 19:35:07,256 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:35:07,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705569188] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:07,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:35:07,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26] total 40 [2021-10-21 19:35:07,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996473584] [2021-10-21 19:35:07,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-21 19:35:07,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:35:07,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-21 19:35:07,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2021-10-21 19:35:07,258 INFO L87 Difference]: Start difference. First operand 265 states and 293 transitions. Second operand has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:09,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:35:09,785 INFO L93 Difference]: Finished difference Result 446 states and 485 transitions. [2021-10-21 19:35:09,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-21 19:35:09,785 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-10-21 19:35:09,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:35:09,787 INFO L225 Difference]: With dead ends: 446 [2021-10-21 19:35:09,787 INFO L226 Difference]: Without dead ends: 354 [2021-10-21 19:35:09,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2695.8ms TimeCoverageRelationStatistics Valid=459, Invalid=5393, Unknown=0, NotChecked=0, Total=5852 [2021-10-21 19:35:09,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-10-21 19:35:09,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 317. [2021-10-21 19:35:09,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 307 states have (on average 1.1205211726384365) internal successors, (344), 308 states have internal predecessors, (344), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:09,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 352 transitions. [2021-10-21 19:35:09,798 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 352 transitions. Word has length 58 [2021-10-21 19:35:09,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:35:09,798 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 352 transitions. [2021-10-21 19:35:09,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 37 states have internal predecessors, (97), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:09,799 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 352 transitions. [2021-10-21 19:35:09,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-21 19:35:09,800 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:35:09,800 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 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] [2021-10-21 19:35:09,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:35:10,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:10,028 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:35:10,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:35:10,028 INFO L82 PathProgramCache]: Analyzing trace with hash -179282827, now seen corresponding path program 6 times [2021-10-21 19:35:10,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:35:10,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680439906] [2021-10-21 19:35:10,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:10,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:35:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:10,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:35:10,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:35:10,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:35:10,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680439906] [2021-10-21 19:35:10,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680439906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:10,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806553494] [2021-10-21 19:35:10,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:35:10,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:10,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:35:10,248 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:35:10,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:35:11,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-21 19:35:11,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:35:11,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-21 19:35:11,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:35:11,199 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:35:11,199 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-21 19:35:11,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 19:35:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:35:11,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806553494] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:11,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:35:11,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 19 [2021-10-21 19:35:11,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637889452] [2021-10-21 19:35:11,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-21 19:35:11,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:35:11,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:35:11,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:35:11,660 INFO L87 Difference]: Start difference. First operand 317 states and 352 transitions. Second operand has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 18 states have internal predecessors, (90), 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 19:35:12,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:35:12,203 INFO L93 Difference]: Finished difference Result 376 states and 413 transitions. [2021-10-21 19:35:12,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:35:12,203 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 18 states have internal predecessors, (90), 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 62 [2021-10-21 19:35:12,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:35:12,207 INFO L225 Difference]: With dead ends: 376 [2021-10-21 19:35:12,207 INFO L226 Difference]: Without dead ends: 376 [2021-10-21 19:35:12,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 317.4ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-10-21 19:35:12,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-10-21 19:35:12,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 364. [2021-10-21 19:35:12,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 354 states have (on average 1.1214689265536724) internal successors, (397), 355 states have internal predecessors, (397), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 405 transitions. [2021-10-21 19:35:12,220 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 405 transitions. Word has length 62 [2021-10-21 19:35:12,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:35:12,221 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 405 transitions. [2021-10-21 19:35:12,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 18 states have internal predecessors, (90), 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 19:35:12,221 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 405 transitions. [2021-10-21 19:35:12,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-21 19:35:12,223 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:35:12,223 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:35:12,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:35:12,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:12,444 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:35:12,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:35:12,444 INFO L82 PathProgramCache]: Analyzing trace with hash -867919012, now seen corresponding path program 6 times [2021-10-21 19:35:12,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:35:12,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819076683] [2021-10-21 19:35:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:12,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:35:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:12,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:35:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:12,807 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:35:12,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:35:12,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819076683] [2021-10-21 19:35:12,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819076683] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:12,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230753454] [2021-10-21 19:35:12,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:35:12,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:12,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:35:12,809 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:35:12,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:35:13,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-21 19:35:13,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:35:13,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-21 19:35:13,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:35:13,556 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:35:13,557 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:35:13,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-10-21 19:35:13,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-21 19:35:14,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-21 19:35:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:35:14,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230753454] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:14,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:35:14,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 33 [2021-10-21 19:35:14,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334355527] [2021-10-21 19:35:14,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-21 19:35:14,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:35:14,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-21 19:35:14,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=971, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:35:14,211 INFO L87 Difference]: Start difference. First operand 364 states and 405 transitions. Second operand has 33 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 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 19:35:15,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:35:15,949 INFO L93 Difference]: Finished difference Result 623 states and 683 transitions. [2021-10-21 19:35:15,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-21 19:35:15,951 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 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 66 [2021-10-21 19:35:15,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:35:15,953 INFO L225 Difference]: With dead ends: 623 [2021-10-21 19:35:15,953 INFO L226 Difference]: Without dead ends: 550 [2021-10-21 19:35:15,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1198.0ms TimeCoverageRelationStatistics Valid=400, Invalid=3890, Unknown=0, NotChecked=0, Total=4290 [2021-10-21 19:35:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-10-21 19:35:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 482. [2021-10-21 19:35:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 471 states have (on average 1.1252653927813163) internal successors, (530), 472 states have internal predecessors, (530), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 539 transitions. [2021-10-21 19:35:15,970 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 539 transitions. Word has length 66 [2021-10-21 19:35:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:35:15,971 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 539 transitions. [2021-10-21 19:35:15,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.125) internal successors, (100), 31 states have internal predecessors, (100), 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 19:35:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 539 transitions. [2021-10-21 19:35:15,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-21 19:35:15,972 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:35:15,973 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 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] [2021-10-21 19:35:16,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:35:16,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:16,188 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:35:16,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:35:16,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1015556452, now seen corresponding path program 7 times [2021-10-21 19:35:16,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:35:16,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945754560] [2021-10-21 19:35:16,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:16,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:35:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:16,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:35:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 19:35:16,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:35:16,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945754560] [2021-10-21 19:35:16,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945754560] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:16,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224938381] [2021-10-21 19:35:16,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:35:16,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:16,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:35:16,436 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:35:16,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:35:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:17,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-21 19:35:17,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:35:17,379 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:35:17,379 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:35:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-21 19:35:17,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224938381] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:17,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:35:17,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-10-21 19:35:17,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937804069] [2021-10-21 19:35:17,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-21 19:35:17,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:35:17,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-21 19:35:17,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-10-21 19:35:17,785 INFO L87 Difference]: Start difference. First operand 482 states and 539 transitions. Second operand has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 29 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:18,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:35:18,480 INFO L93 Difference]: Finished difference Result 671 states and 738 transitions. [2021-10-21 19:35:18,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:35:18,480 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 29 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-10-21 19:35:18,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:35:18,483 INFO L225 Difference]: With dead ends: 671 [2021-10-21 19:35:18,483 INFO L226 Difference]: Without dead ends: 605 [2021-10-21 19:35:18,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2021-10-21 19:35:18,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-10-21 19:35:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 560. [2021-10-21 19:35:18,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 548 states have (on average 1.1222627737226278) internal successors, (615), 549 states have internal predecessors, (615), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:18,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 625 transitions. [2021-10-21 19:35:18,504 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 625 transitions. Word has length 66 [2021-10-21 19:35:18,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:35:18,504 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 625 transitions. [2021-10-21 19:35:18,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.193548387096774) internal successors, (99), 29 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:18,505 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 625 transitions. [2021-10-21 19:35:18,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-21 19:35:18,507 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:35:18,507 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:35:18,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:35:18,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-21 19:35:18,732 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:35:18,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:35:18,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2006443839, now seen corresponding path program 7 times [2021-10-21 19:35:18,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:35:18,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526790075] [2021-10-21 19:35:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:18,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:35:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:19,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:35:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:35:19,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:35:19,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526790075] [2021-10-21 19:35:19,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526790075] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:19,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173621088] [2021-10-21 19:35:19,130 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:35:19,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:19,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:35:19,136 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:35:19,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:35:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:20,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-21 19:35:20,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:35:20,549 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 19:35:20,611 INFO L354 Elim1Store]: treesize reduction 34, result has 22.7 percent of original size [2021-10-21 19:35:20,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-10-21 19:35:21,772 INFO L354 Elim1Store]: treesize reduction 35, result has 18.6 percent of original size [2021-10-21 19:35:21,773 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 27 [2021-10-21 19:35:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 20 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:35:21,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173621088] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:21,797 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:35:21,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 39 [2021-10-21 19:35:21,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936114783] [2021-10-21 19:35:21,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-21 19:35:21,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:35:21,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-21 19:35:21,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1382, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 19:35:21,799 INFO L87 Difference]: Start difference. First operand 560 states and 625 transitions. Second operand has 39 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 36 states have internal predecessors, (121), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:24,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:35:24,157 INFO L93 Difference]: Finished difference Result 944 states and 1040 transitions. [2021-10-21 19:35:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-21 19:35:24,158 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 36 states have internal predecessors, (121), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-10-21 19:35:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:35:24,161 INFO L225 Difference]: With dead ends: 944 [2021-10-21 19:35:24,162 INFO L226 Difference]: Without dead ends: 684 [2021-10-21 19:35:24,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 2013.4ms TimeCoverageRelationStatistics Valid=411, Invalid=5441, Unknown=0, NotChecked=0, Total=5852 [2021-10-21 19:35:24,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2021-10-21 19:35:24,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 620. [2021-10-21 19:35:24,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 607 states have (on average 1.1219110378912684) internal successors, (681), 608 states have internal predecessors, (681), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:24,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 692 transitions. [2021-10-21 19:35:24,183 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 692 transitions. Word has length 70 [2021-10-21 19:35:24,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:35:24,183 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 692 transitions. [2021-10-21 19:35:24,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.1842105263157894) internal successors, (121), 36 states have internal predecessors, (121), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:24,184 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 692 transitions. [2021-10-21 19:35:24,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-21 19:35:24,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:35:24,185 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:35:24,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-21 19:35:24,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-21 19:35:24,410 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:35:24,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:35:24,411 INFO L82 PathProgramCache]: Analyzing trace with hash -613552583, now seen corresponding path program 8 times [2021-10-21 19:35:24,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:35:24,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221017445] [2021-10-21 19:35:24,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:24,411 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:35:24,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:24,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:35:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:24,749 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 68 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:35:24,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:35:24,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221017445] [2021-10-21 19:35:24,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221017445] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:24,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843711401] [2021-10-21 19:35:24,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:35:24,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:24,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:35:24,752 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:35:24,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 19:35:25,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:35:25,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:35:25,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-21 19:35:25,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:35:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:35:26,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843711401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:26,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:35:26,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 30 [2021-10-21 19:35:26,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713302807] [2021-10-21 19:35:26,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-21 19:35:26,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:35:26,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-21 19:35:26,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:35:26,330 INFO L87 Difference]: Start difference. First operand 620 states and 692 transitions. Second operand has 31 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:27,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:35:27,280 INFO L93 Difference]: Finished difference Result 762 states and 845 transitions. [2021-10-21 19:35:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:35:27,281 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-10-21 19:35:27,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:35:27,285 INFO L225 Difference]: With dead ends: 762 [2021-10-21 19:35:27,285 INFO L226 Difference]: Without dead ends: 762 [2021-10-21 19:35:27,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 608.7ms TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2021-10-21 19:35:27,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-10-21 19:35:27,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 655. [2021-10-21 19:35:27,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 655 states, 642 states have (on average 1.1246105919003115) internal successors, (722), 643 states have internal predecessors, (722), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:27,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 655 states to 655 states and 733 transitions. [2021-10-21 19:35:27,306 INFO L78 Accepts]: Start accepts. Automaton has 655 states and 733 transitions. Word has length 70 [2021-10-21 19:35:27,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:35:27,307 INFO L470 AbstractCegarLoop]: Abstraction has 655 states and 733 transitions. [2021-10-21 19:35:27,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 3.5714285714285716) internal successors, (100), 28 states have internal predecessors, (100), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:27,307 INFO L276 IsEmpty]: Start isEmpty. Operand 655 states and 733 transitions. [2021-10-21 19:35:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-21 19:35:27,309 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:35:27,309 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:35:27,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 19:35:27,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-21 19:35:27,536 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:35:27,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:35:27,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1953664988, now seen corresponding path program 8 times [2021-10-21 19:35:27,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:35:27,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702590534] [2021-10-21 19:35:27,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:27,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:35:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:27,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:35:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:27,811 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:35:27,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:35:27,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702590534] [2021-10-21 19:35:27,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702590534] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:27,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011063459] [2021-10-21 19:35:27,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:35:27,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:27,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:35:27,813 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:35:27,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 19:35:29,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:35:29,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:35:29,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-21 19:35:29,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:35:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:35:29,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011063459] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:29,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:35:29,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2021-10-21 19:35:29,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725976958] [2021-10-21 19:35:29,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-21 19:35:29,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:35:29,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-21 19:35:29,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:35:29,541 INFO L87 Difference]: Start difference. First operand 655 states and 733 transitions. Second operand has 27 states, 26 states have (on average 4.0) internal successors, (104), 24 states have internal predecessors, (104), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:35:30,372 INFO L93 Difference]: Finished difference Result 765 states and 850 transitions. [2021-10-21 19:35:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:35:30,372 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.0) internal successors, (104), 24 states have internal predecessors, (104), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-10-21 19:35:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:35:30,376 INFO L225 Difference]: With dead ends: 765 [2021-10-21 19:35:30,376 INFO L226 Difference]: Without dead ends: 765 [2021-10-21 19:35:30,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 517.5ms TimeCoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2021-10-21 19:35:30,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2021-10-21 19:35:30,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 748. [2021-10-21 19:35:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 748 states, 735 states have (on average 1.125170068027211) internal successors, (827), 736 states have internal predecessors, (827), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:30,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 748 states to 748 states and 838 transitions. [2021-10-21 19:35:30,393 INFO L78 Accepts]: Start accepts. Automaton has 748 states and 838 transitions. Word has length 74 [2021-10-21 19:35:30,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:35:30,394 INFO L470 AbstractCegarLoop]: Abstraction has 748 states and 838 transitions. [2021-10-21 19:35:30,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.0) internal successors, (104), 24 states have internal predecessors, (104), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:30,394 INFO L276 IsEmpty]: Start isEmpty. Operand 748 states and 838 transitions. [2021-10-21 19:35:30,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-21 19:35:30,396 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:35:30,396 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:35:30,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 19:35:30,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-21 19:35:30,624 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrpbrkErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:35:30,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:35:30,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1045914642, now seen corresponding path program 9 times [2021-10-21 19:35:30,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:35:30,624 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218795334] [2021-10-21 19:35:30,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:30,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:35:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:31,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:35:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-21 19:35:31,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:35:31,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218795334] [2021-10-21 19:35:31,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218795334] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:31,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768923900] [2021-10-21 19:35:31,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:35:31,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:31,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:35:31,048 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:35:31,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 19:35:32,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-21 19:35:32,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:35:32,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-21 19:35:32,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:35:32,078 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:35:32,079 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:35:32,273 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 23 treesize of output 19 [2021-10-21 19:35:32,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:35:32,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-10-21 19:35:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-10-21 19:35:32,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768923900] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:32,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:35:32,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 34 [2021-10-21 19:35:32,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286532238] [2021-10-21 19:35:32,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-21 19:35:32,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:35:32,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-21 19:35:32,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1040, Unknown=0, NotChecked=0, Total=1122 [2021-10-21 19:35:32,930 INFO L87 Difference]: Start difference. First operand 748 states and 838 transitions. Second operand has 34 states, 32 states have (on average 3.09375) internal successors, (99), 31 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:37,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:35:37,613 INFO L93 Difference]: Finished difference Result 1142 states and 1256 transitions. [2021-10-21 19:35:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-10-21 19:35:37,613 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 3.09375) internal successors, (99), 31 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-10-21 19:35:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:35:37,616 INFO L225 Difference]: With dead ends: 1142 [2021-10-21 19:35:37,616 INFO L226 Difference]: Without dead ends: 803 [2021-10-21 19:35:37,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2491 ImplicationChecksByTransitivity, 3916.9ms TimeCoverageRelationStatistics Valid=1025, Invalid=8677, Unknown=0, NotChecked=0, Total=9702 [2021-10-21 19:35:37,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2021-10-21 19:35:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 616. [2021-10-21 19:35:37,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 606 states have (on average 1.1155115511551155) internal successors, (676), 606 states have internal predecessors, (676), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 685 transitions. [2021-10-21 19:35:37,634 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 685 transitions. Word has length 75 [2021-10-21 19:35:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:35:37,634 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 685 transitions. [2021-10-21 19:35:37,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 3.09375) internal successors, (99), 31 states have internal predecessors, (99), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:35:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 685 transitions. [2021-10-21 19:35:37,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-21 19:35:37,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:35:37,636 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:35:37,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-21 19:35:37,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:37,852 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:35:37,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:35:37,852 INFO L82 PathProgramCache]: Analyzing trace with hash -27278426, now seen corresponding path program 9 times [2021-10-21 19:35:37,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:35:37,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654823329] [2021-10-21 19:35:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:35:37,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:35:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:38,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:35:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:35:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:35:38,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:35:38,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654823329] [2021-10-21 19:35:38,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654823329] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:38,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044520371] [2021-10-21 19:35:38,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:35:38,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:35:38,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:35:38,344 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:35:38,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 19:35:39,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-21 19:35:39,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:35:39,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-21 19:35:39,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:35:39,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 19:35:39,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 19:35:39,921 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-21 19:35:39,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-21 19:35:41,141 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-21 19:35:41,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-10-21 19:35:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 26 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:35:41,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044520371] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:35:41,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:35:41,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2021-10-21 19:35:41,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225249484] [2021-10-21 19:35:41,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-21 19:35:41,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:35:41,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-21 19:35:41,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 19:35:41,164 INFO L87 Difference]: Start difference. First operand 616 states and 685 transitions. Second operand has 39 states, 38 states have (on average 3.789473684210526) internal successors, (144), 36 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:13,957 INFO L93 Difference]: Finished difference Result 1106 states and 1221 transitions. [2021-10-21 19:36:13,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 19:36:13,958 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 3.789473684210526) internal successors, (144), 36 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-10-21 19:36:13,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:13,960 INFO L225 Difference]: With dead ends: 1106 [2021-10-21 19:36:13,960 INFO L226 Difference]: Without dead ends: 630 [2021-10-21 19:36:13,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 32062.8ms TimeCoverageRelationStatistics Valid=248, Invalid=3174, Unknown=0, NotChecked=0, Total=3422 [2021-10-21 19:36:13,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-10-21 19:36:13,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 624. [2021-10-21 19:36:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 614 states have (on average 1.1140065146579805) internal successors, (684), 614 states have internal predecessors, (684), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:13,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 693 transitions. [2021-10-21 19:36:13,976 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 693 transitions. Word has length 82 [2021-10-21 19:36:13,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:13,977 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 693 transitions. [2021-10-21 19:36:13,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 3.789473684210526) internal successors, (144), 36 states have internal predecessors, (144), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:13,977 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 693 transitions. [2021-10-21 19:36:13,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-21 19:36:13,979 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:13,979 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:14,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-21 19:36:14,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-21 19:36:14,195 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:36:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:14,196 INFO L82 PathProgramCache]: Analyzing trace with hash -958830397, now seen corresponding path program 10 times [2021-10-21 19:36:14,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:14,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001150036] [2021-10-21 19:36:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:14,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:14,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 32 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:36:14,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:14,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001150036] [2021-10-21 19:36:14,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001150036] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:14,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569960710] [2021-10-21 19:36:14,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:36:14,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:36:14,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:36:14,517 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:36:14,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 19:36:15,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:36:15,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:36:15,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-21 19:36:15,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:36:16,084 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 50 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:36:16,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569960710] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:16,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:36:16,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 28 [2021-10-21 19:36:16,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485780479] [2021-10-21 19:36:16,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-21 19:36:16,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:16,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-21 19:36:16,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:36:16,086 INFO L87 Difference]: Start difference. First operand 624 states and 693 transitions. Second operand has 29 states, 28 states have (on average 4.285714285714286) internal successors, (120), 26 states have internal predecessors, (120), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:16,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:16,861 INFO L93 Difference]: Finished difference Result 737 states and 817 transitions. [2021-10-21 19:36:16,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:36:16,861 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.285714285714286) internal successors, (120), 26 states have internal predecessors, (120), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-10-21 19:36:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:16,864 INFO L225 Difference]: With dead ends: 737 [2021-10-21 19:36:16,864 INFO L226 Difference]: Without dead ends: 737 [2021-10-21 19:36:16,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 496.0ms TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 19:36:16,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-10-21 19:36:16,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 723. [2021-10-21 19:36:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 713 states have (on average 1.1136044880785414) internal successors, (794), 713 states have internal predecessors, (794), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 803 transitions. [2021-10-21 19:36:16,880 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 803 transitions. Word has length 86 [2021-10-21 19:36:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:16,881 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 803 transitions. [2021-10-21 19:36:16,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.285714285714286) internal successors, (120), 26 states have internal predecessors, (120), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:16,881 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 803 transitions. [2021-10-21 19:36:16,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-21 19:36:16,883 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:16,883 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:16,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-21 19:36:17,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-21 19:36:17,104 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:36:17,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:17,104 INFO L82 PathProgramCache]: Analyzing trace with hash 305055117, now seen corresponding path program 11 times [2021-10-21 19:36:17,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:17,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406935479] [2021-10-21 19:36:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:17,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:17,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 32 proven. 166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:36:17,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:17,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406935479] [2021-10-21 19:36:17,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406935479] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:17,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002010749] [2021-10-21 19:36:17,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:36:17,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:36:17,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:36:17,554 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:36:17,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-21 19:36:18,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-21 19:36:18,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:36:18,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 96 conjunts are in the unsatisfiable core [2021-10-21 19:36:18,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:36:18,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 19:36:19,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 19:36:19,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-21 19:36:21,921 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-21 19:36:21,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 34 [2021-10-21 19:36:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 32 proven. 166 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:36:21,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002010749] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:21,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:36:21,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-10-21 19:36:21,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273023343] [2021-10-21 19:36:21,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-21 19:36:21,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:21,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-21 19:36:21,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1870, Unknown=0, NotChecked=0, Total=1980 [2021-10-21 19:36:21,952 INFO L87 Difference]: Start difference. First operand 723 states and 803 transitions. Second operand has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 42 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:24,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:24,963 INFO L93 Difference]: Finished difference Result 1312 states and 1449 transitions. [2021-10-21 19:36:24,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-21 19:36:24,964 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 42 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-10-21 19:36:24,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:24,967 INFO L225 Difference]: With dead ends: 1312 [2021-10-21 19:36:24,967 INFO L226 Difference]: Without dead ends: 737 [2021-10-21 19:36:24,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 2545.8ms TimeCoverageRelationStatistics Valid=289, Invalid=4267, Unknown=0, NotChecked=0, Total=4556 [2021-10-21 19:36:24,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-10-21 19:36:24,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 731. [2021-10-21 19:36:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 721 states have (on average 1.1123439667128987) internal successors, (802), 721 states have internal predecessors, (802), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:24,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 811 transitions. [2021-10-21 19:36:24,984 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 811 transitions. Word has length 94 [2021-10-21 19:36:24,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:24,985 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 811 transitions. [2021-10-21 19:36:24,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.8181818181818183) internal successors, (168), 42 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 811 transitions. [2021-10-21 19:36:24,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-21 19:36:24,987 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:24,987 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:25,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-21 19:36:25,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-21 19:36:25,204 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:36:25,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:25,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1697687338, now seen corresponding path program 12 times [2021-10-21 19:36:25,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:25,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195512619] [2021-10-21 19:36:25,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:25,204 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:25,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 50 proven. 173 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:36:25,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:25,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195512619] [2021-10-21 19:36:25,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195512619] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:25,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79565165] [2021-10-21 19:36:25,542 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:36:25,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:36:25,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:36:25,556 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:36:25,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-21 19:36:26,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-21 19:36:26,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:36:26,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-21 19:36:26,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:36:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 72 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:36:27,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79565165] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:27,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:36:27,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 38 [2021-10-21 19:36:27,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225993496] [2021-10-21 19:36:27,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-21 19:36:27,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:27,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-21 19:36:27,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 19:36:27,554 INFO L87 Difference]: Start difference. First operand 731 states and 811 transitions. Second operand has 39 states, 38 states have (on average 4.842105263157895) internal successors, (184), 36 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:28,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:36:28,701 INFO L93 Difference]: Finished difference Result 844 states and 935 transitions. [2021-10-21 19:36:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-21 19:36:28,702 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 4.842105263157895) internal successors, (184), 36 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-10-21 19:36:28,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:36:28,705 INFO L225 Difference]: With dead ends: 844 [2021-10-21 19:36:28,705 INFO L226 Difference]: Without dead ends: 844 [2021-10-21 19:36:28,706 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 892.3ms TimeCoverageRelationStatistics Valid=378, Invalid=2592, Unknown=0, NotChecked=0, Total=2970 [2021-10-21 19:36:28,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 844 states. [2021-10-21 19:36:28,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 844 to 830. [2021-10-21 19:36:28,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 820 states have (on average 1.1121951219512196) internal successors, (912), 820 states have internal predecessors, (912), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:28,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 921 transitions. [2021-10-21 19:36:28,724 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 921 transitions. Word has length 98 [2021-10-21 19:36:28,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:36:28,725 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 921 transitions. [2021-10-21 19:36:28,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 4.842105263157895) internal successors, (184), 36 states have internal predecessors, (184), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:36:28,725 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 921 transitions. [2021-10-21 19:36:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-21 19:36:28,727 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:36:28,727 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:36:28,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-21 19:36:28,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:36:28,948 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:36:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:36:28,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1544508172, now seen corresponding path program 13 times [2021-10-21 19:36:28,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:36:28,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639213852] [2021-10-21 19:36:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:36:28,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:36:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:29,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:36:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 38 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:36:29,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:36:29,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639213852] [2021-10-21 19:36:29,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639213852] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:29,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405426552] [2021-10-21 19:36:29,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:36:29,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:36:29,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:36:29,501 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:36:29,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-21 19:36:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:36:30,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 91 conjunts are in the unsatisfiable core [2021-10-21 19:36:30,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:36:30,844 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:36:30,845 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:36:31,421 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:36:31,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-10-21 19:36:31,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 19:36:31,836 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-21 19:36:31,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-10-21 19:36:34,661 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-10-21 19:36:34,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 32 [2021-10-21 19:36:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 38 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:36:34,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405426552] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:36:34,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:36:34,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 50 [2021-10-21 19:36:34,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857854710] [2021-10-21 19:36:34,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-21 19:36:34,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:36:34,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-21 19:36:34,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2021-10-21 19:36:34,681 INFO L87 Difference]: Start difference. First operand 830 states and 921 transitions. Second operand has 50 states, 49 states have (on average 3.938775510204082) internal successors, (193), 47 states have internal predecessors, (193), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:00,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:00,240 INFO L93 Difference]: Finished difference Result 1524 states and 1683 transitions. [2021-10-21 19:37:00,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-21 19:37:00,240 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.938775510204082) internal successors, (193), 47 states have internal predecessors, (193), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-10-21 19:37:00,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:00,244 INFO L225 Difference]: With dead ends: 1524 [2021-10-21 19:37:00,244 INFO L226 Difference]: Without dead ends: 847 [2021-10-21 19:37:00,245 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 21168.3ms TimeCoverageRelationStatistics Valid=411, Invalid=7418, Unknown=3, NotChecked=0, Total=7832 [2021-10-21 19:37:00,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-10-21 19:37:00,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 838. [2021-10-21 19:37:00,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 828 states have (on average 1.1111111111111112) internal successors, (920), 828 states have internal predecessors, (920), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:00,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 929 transitions. [2021-10-21 19:37:00,260 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 929 transitions. Word has length 106 [2021-10-21 19:37:00,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:00,260 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 929 transitions. [2021-10-21 19:37:00,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.938775510204082) internal successors, (193), 47 states have internal predecessors, (193), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:00,261 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 929 transitions. [2021-10-21 19:37:00,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-10-21 19:37:00,263 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:00,263 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:00,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-21 19:37:00,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-21 19:37:00,476 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:37:00,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:00,476 INFO L82 PathProgramCache]: Analyzing trace with hash -326890735, now seen corresponding path program 14 times [2021-10-21 19:37:00,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:00,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654527604] [2021-10-21 19:37:00,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:00,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:00,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:00,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:00,902 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 72 proven. 230 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:37:00,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:00,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654527604] [2021-10-21 19:37:00,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654527604] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:37:00,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571936288] [2021-10-21 19:37:00,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:37:00,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:37:00,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:37:00,904 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:37:00,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-21 19:37:02,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:37:02,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:37:02,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-21 19:37:02,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:37:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 91 proven. 211 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:37:03,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571936288] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:37:03,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:37:03,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 35 [2021-10-21 19:37:03,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618850736] [2021-10-21 19:37:03,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-21 19:37:03,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:03,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-21 19:37:03,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:37:03,043 INFO L87 Difference]: Start difference. First operand 838 states and 929 transitions. Second operand has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 33 states have internal predecessors, (152), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:04,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:04,158 INFO L93 Difference]: Finished difference Result 951 states and 1053 transitions. [2021-10-21 19:37:04,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-21 19:37:04,158 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 33 states have internal predecessors, (152), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-10-21 19:37:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:04,163 INFO L225 Difference]: With dead ends: 951 [2021-10-21 19:37:04,163 INFO L226 Difference]: Without dead ends: 951 [2021-10-21 19:37:04,164 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 748.0ms TimeCoverageRelationStatistics Valid=276, Invalid=2076, Unknown=0, NotChecked=0, Total=2352 [2021-10-21 19:37:04,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-10-21 19:37:04,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 937. [2021-10-21 19:37:04,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 927 states have (on average 1.1111111111111112) internal successors, (1030), 927 states have internal predecessors, (1030), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:04,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1039 transitions. [2021-10-21 19:37:04,182 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1039 transitions. Word has length 110 [2021-10-21 19:37:04,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:04,184 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 1039 transitions. [2021-10-21 19:37:04,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.3428571428571425) internal successors, (152), 33 states have internal predecessors, (152), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:04,185 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1039 transitions. [2021-10-21 19:37:04,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-21 19:37:04,187 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:04,187 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:04,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-21 19:37:04,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:37:04,412 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:37:04,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:04,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1760639451, now seen corresponding path program 15 times [2021-10-21 19:37:04,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:04,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458183736] [2021-10-21 19:37:04,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:04,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:05,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:37:05,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:05,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458183736] [2021-10-21 19:37:05,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458183736] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:37:05,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972832689] [2021-10-21 19:37:05,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:37:05,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:37:05,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:37:05,097 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:37:05,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-21 19:37:06,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-21 19:37:06,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:37:06,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 110 conjunts are in the unsatisfiable core [2021-10-21 19:37:06,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:37:06,742 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:37:06,742 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:37:06,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 19:37:07,998 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 19:37:08,078 INFO L354 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2021-10-21 19:37:08,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-10-21 19:37:09,990 INFO L354 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2021-10-21 19:37:09,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 33 [2021-10-21 19:37:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 44 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:37:10,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972832689] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:37:10,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:37:10,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 52 [2021-10-21 19:37:10,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679314125] [2021-10-21 19:37:10,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-21 19:37:10,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:10,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-21 19:37:10,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2518, Unknown=0, NotChecked=0, Total=2652 [2021-10-21 19:37:10,012 INFO L87 Difference]: Start difference. First operand 937 states and 1039 transitions. Second operand has 52 states, 51 states have (on average 4.254901960784314) internal successors, (217), 49 states have internal predecessors, (217), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:14,142 INFO L93 Difference]: Finished difference Result 1791 states and 1971 transitions. [2021-10-21 19:37:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-21 19:37:14,142 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 4.254901960784314) internal successors, (217), 49 states have internal predecessors, (217), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-10-21 19:37:14,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:14,148 INFO L225 Difference]: With dead ends: 1791 [2021-10-21 19:37:14,148 INFO L226 Difference]: Without dead ends: 954 [2021-10-21 19:37:14,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2852 ImplicationChecksByTransitivity, 3469.9ms TimeCoverageRelationStatistics Valid=543, Invalid=10799, Unknown=0, NotChecked=0, Total=11342 [2021-10-21 19:37:14,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-10-21 19:37:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 945. [2021-10-21 19:37:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 935 states have (on average 1.1101604278074866) internal successors, (1038), 935 states have internal predecessors, (1038), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:14,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1047 transitions. [2021-10-21 19:37:14,175 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1047 transitions. Word has length 118 [2021-10-21 19:37:14,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:14,175 INFO L470 AbstractCegarLoop]: Abstraction has 945 states and 1047 transitions. [2021-10-21 19:37:14,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 4.254901960784314) internal successors, (217), 49 states have internal predecessors, (217), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1047 transitions. [2021-10-21 19:37:14,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-10-21 19:37:14,179 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:14,179 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:14,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-21 19:37:14,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:37:14,395 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:37:14,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:14,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1908452232, now seen corresponding path program 16 times [2021-10-21 19:37:14,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:14,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307114473] [2021-10-21 19:37:14,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:14,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:14,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:14,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 98 proven. 295 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:37:14,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:14,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307114473] [2021-10-21 19:37:14,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307114473] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:37:14,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547713530] [2021-10-21 19:37:14,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:37:14,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:37:14,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:37:14,814 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:37:14,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-21 19:37:16,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:37:16,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:37:16,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-21 19:37:16,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:37:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 128 proven. 265 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:37:17,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547713530] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:37:17,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:37:17,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 37 [2021-10-21 19:37:17,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85832983] [2021-10-21 19:37:17,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-21 19:37:17,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:17,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-21 19:37:17,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2021-10-21 19:37:17,191 INFO L87 Difference]: Start difference. First operand 945 states and 1047 transitions. Second operand has 38 states, 37 states have (on average 4.54054054054054) internal successors, (168), 35 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:18,282 INFO L93 Difference]: Finished difference Result 1058 states and 1171 transitions. [2021-10-21 19:37:18,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-21 19:37:18,283 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 4.54054054054054) internal successors, (168), 35 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2021-10-21 19:37:18,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:18,286 INFO L225 Difference]: With dead ends: 1058 [2021-10-21 19:37:18,287 INFO L226 Difference]: Without dead ends: 1058 [2021-10-21 19:37:18,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 732.6ms TimeCoverageRelationStatistics Valid=293, Invalid=2257, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 19:37:18,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-10-21 19:37:18,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1044. [2021-10-21 19:37:18,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1034 states have (on average 1.1102514506769825) internal successors, (1148), 1034 states have internal predecessors, (1148), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:18,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 1157 transitions. [2021-10-21 19:37:18,299 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 1157 transitions. Word has length 122 [2021-10-21 19:37:18,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:18,300 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 1157 transitions. [2021-10-21 19:37:18,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 4.54054054054054) internal successors, (168), 35 states have internal predecessors, (168), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:18,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 1157 transitions. [2021-10-21 19:37:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-10-21 19:37:18,303 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:18,303 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:18,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-21 19:37:18,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:37:18,528 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:37:18,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:18,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1255943234, now seen corresponding path program 17 times [2021-10-21 19:37:18,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:18,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268650713] [2021-10-21 19:37:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:18,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:19,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:19,276 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 50 proven. 409 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:37:19,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:19,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268650713] [2021-10-21 19:37:19,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268650713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:37:19,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387699633] [2021-10-21 19:37:19,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:37:19,277 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:37:19,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:37:19,278 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:37:19,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-21 19:37:21,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-21 19:37:21,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:37:21,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 143 conjunts are in the unsatisfiable core [2021-10-21 19:37:21,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:37:21,933 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 19:37:22,012 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-21 19:37:22,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 30 [2021-10-21 19:37:24,669 INFO L354 Elim1Store]: treesize reduction 35, result has 18.6 percent of original size [2021-10-21 19:37:24,670 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 27 [2021-10-21 19:37:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 50 proven. 409 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:37:24,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387699633] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:37:24,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:37:24,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 37] total 63 [2021-10-21 19:37:24,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433178211] [2021-10-21 19:37:24,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-10-21 19:37:24,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:24,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-10-21 19:37:24,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=3755, Unknown=0, NotChecked=0, Total=3906 [2021-10-21 19:37:24,699 INFO L87 Difference]: Start difference. First operand 1044 states and 1157 transitions. Second operand has 63 states, 62 states have (on average 3.870967741935484) internal successors, (240), 60 states have internal predecessors, (240), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:30,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:30,117 INFO L93 Difference]: Finished difference Result 2504 states and 2769 transitions. [2021-10-21 19:37:30,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-21 19:37:30,118 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.870967741935484) internal successors, (240), 60 states have internal predecessors, (240), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-10-21 19:37:30,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:30,122 INFO L225 Difference]: With dead ends: 2504 [2021-10-21 19:37:30,122 INFO L226 Difference]: Without dead ends: 1058 [2021-10-21 19:37:30,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 4680.9ms TimeCoverageRelationStatistics Valid=572, Invalid=12768, Unknown=0, NotChecked=0, Total=13340 [2021-10-21 19:37:30,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2021-10-21 19:37:30,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1052. [2021-10-21 19:37:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1042 states have (on average 1.109404990403071) internal successors, (1156), 1042 states have internal predecessors, (1156), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1165 transitions. [2021-10-21 19:37:30,135 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1165 transitions. Word has length 130 [2021-10-21 19:37:30,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:30,135 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 1165 transitions. [2021-10-21 19:37:30,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.870967741935484) internal successors, (240), 60 states have internal predecessors, (240), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:30,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1165 transitions. [2021-10-21 19:37:30,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-10-21 19:37:30,138 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:30,138 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:30,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-21 19:37:30,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:37:30,363 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:37:30,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:30,363 INFO L82 PathProgramCache]: Analyzing trace with hash -2144451745, now seen corresponding path program 18 times [2021-10-21 19:37:30,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:30,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920349302] [2021-10-21 19:37:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:30,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:30,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:30,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:30,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 128 proven. 368 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:37:30,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:30,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920349302] [2021-10-21 19:37:30,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920349302] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:37:30,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357906433] [2021-10-21 19:37:30,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:37:30,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:37:30,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:37:30,841 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:37:30,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-21 19:37:32,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-10-21 19:37:32,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:37:32,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-21 19:37:32,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:37:33,751 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 162 proven. 334 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:37:33,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357906433] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:37:33,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:37:33,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 50 [2021-10-21 19:37:33,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732118614] [2021-10-21 19:37:33,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-21 19:37:33,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:33,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-21 19:37:33,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2212, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 19:37:33,753 INFO L87 Difference]: Start difference. First operand 1052 states and 1165 transitions. Second operand has 51 states, 50 states have (on average 5.12) internal successors, (256), 48 states have internal predecessors, (256), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:35,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:37:35,479 INFO L93 Difference]: Finished difference Result 1165 states and 1289 transitions. [2021-10-21 19:37:35,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-21 19:37:35,480 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 5.12) internal successors, (256), 48 states have internal predecessors, (256), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2021-10-21 19:37:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:37:35,484 INFO L225 Difference]: With dead ends: 1165 [2021-10-21 19:37:35,484 INFO L226 Difference]: Without dead ends: 1165 [2021-10-21 19:37:35,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 1394.9ms TimeCoverageRelationStatistics Valid=633, Invalid=4623, Unknown=0, NotChecked=0, Total=5256 [2021-10-21 19:37:35,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-10-21 19:37:35,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1151. [2021-10-21 19:37:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1141 states have (on average 1.1095530236634532) internal successors, (1266), 1141 states have internal predecessors, (1266), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1275 transitions. [2021-10-21 19:37:35,497 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1275 transitions. Word has length 134 [2021-10-21 19:37:35,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:37:35,497 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1275 transitions. [2021-10-21 19:37:35,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 5.12) internal successors, (256), 48 states have internal predecessors, (256), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:37:35,498 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1275 transitions. [2021-10-21 19:37:35,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-10-21 19:37:35,500 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:37:35,500 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:37:35,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-10-21 19:37:35,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-21 19:37:35,716 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:37:35,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:37:35,716 INFO L82 PathProgramCache]: Analyzing trace with hash -675462103, now seen corresponding path program 19 times [2021-10-21 19:37:35,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:37:35,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866652091] [2021-10-21 19:37:35,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:37:35,716 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:37:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:36,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:37:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 56 proven. 514 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:37:36,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:37:36,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866652091] [2021-10-21 19:37:36,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866652091] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:37:36,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231455973] [2021-10-21 19:37:36,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:37:36,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:37:36,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:37:36,633 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:37:36,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-21 19:37:38,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:37:38,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 120 conjunts are in the unsatisfiable core [2021-10-21 19:37:38,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:37:38,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 19:37:39,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-10-21 19:37:39,433 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-10-21 19:37:39,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-10-21 19:37:41,855 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-10-21 19:37:41,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 23 [2021-10-21 19:37:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 56 proven. 514 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:37:41,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231455973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:37:41,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:37:41,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 59 [2021-10-21 19:37:41,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400973005] [2021-10-21 19:37:41,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-10-21 19:37:41,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:37:41,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-10-21 19:37:41,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3279, Unknown=0, NotChecked=0, Total=3422 [2021-10-21 19:37:41,876 INFO L87 Difference]: Start difference. First operand 1151 states and 1275 transitions. Second operand has 59 states, 58 states have (on average 4.551724137931035) internal successors, (264), 56 states have internal predecessors, (264), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:37,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:37,396 INFO L93 Difference]: Finished difference Result 2136 states and 2361 transitions. [2021-10-21 19:38:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-21 19:38:37,397 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 4.551724137931035) internal successors, (264), 56 states have internal predecessors, (264), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2021-10-21 19:38:37,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:37,401 INFO L225 Difference]: With dead ends: 2136 [2021-10-21 19:38:37,401 INFO L226 Difference]: Without dead ends: 1165 [2021-10-21 19:38:37,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 53649.1ms TimeCoverageRelationStatistics Valid=363, Invalid=7469, Unknown=0, NotChecked=0, Total=7832 [2021-10-21 19:38:37,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-10-21 19:38:37,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1159. [2021-10-21 19:38:37,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 1149 states have (on average 1.1087902523933855) internal successors, (1274), 1149 states have internal predecessors, (1274), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:37,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1283 transitions. [2021-10-21 19:38:37,416 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1283 transitions. Word has length 142 [2021-10-21 19:38:37,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:37,416 INFO L470 AbstractCegarLoop]: Abstraction has 1159 states and 1283 transitions. [2021-10-21 19:38:37,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 4.551724137931035) internal successors, (264), 56 states have internal predecessors, (264), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:37,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1283 transitions. [2021-10-21 19:38:37,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-10-21 19:38:37,419 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:37,419 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:37,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:37,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-21 19:38:37,635 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:38:37,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:37,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1820104646, now seen corresponding path program 20 times [2021-10-21 19:38:37,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:37,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097070247] [2021-10-21 19:38:37,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:37,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:38,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 162 proven. 449 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:38:38,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:38,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097070247] [2021-10-21 19:38:38,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097070247] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:38,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211801078] [2021-10-21 19:38:38,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:38:38,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:38,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:38:38,199 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:38:38,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-21 19:38:40,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:38:40,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:38:40,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 106 conjunts are in the unsatisfiable core [2021-10-21 19:38:40,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 190 proven. 421 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:38:41,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211801078] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:41,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:38:41,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 44 [2021-10-21 19:38:41,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574431096] [2021-10-21 19:38:41,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-21 19:38:41,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:41,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-21 19:38:41,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1723, Unknown=0, NotChecked=0, Total=1980 [2021-10-21 19:38:41,280 INFO L87 Difference]: Start difference. First operand 1159 states and 1283 transitions. Second operand has 45 states, 44 states have (on average 4.545454545454546) internal successors, (200), 42 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:42,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:38:42,772 INFO L93 Difference]: Finished difference Result 1272 states and 1407 transitions. [2021-10-21 19:38:42,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-21 19:38:42,772 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 4.545454545454546) internal successors, (200), 42 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2021-10-21 19:38:42,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:38:42,778 INFO L225 Difference]: With dead ends: 1272 [2021-10-21 19:38:42,778 INFO L226 Difference]: Without dead ends: 1272 [2021-10-21 19:38:42,779 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 992.7ms TimeCoverageRelationStatistics Valid=408, Invalid=3252, Unknown=0, NotChecked=0, Total=3660 [2021-10-21 19:38:42,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2021-10-21 19:38:42,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1258. [2021-10-21 19:38:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1248 states have (on average 1.108974358974359) internal successors, (1384), 1248 states have internal predecessors, (1384), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1393 transitions. [2021-10-21 19:38:42,800 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1393 transitions. Word has length 146 [2021-10-21 19:38:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:38:42,800 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 1393 transitions. [2021-10-21 19:38:42,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 4.545454545454546) internal successors, (200), 42 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:38:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1393 transitions. [2021-10-21 19:38:42,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-10-21 19:38:42,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:38:42,803 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:38:42,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-21 19:38:43,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-21 19:38:43,024 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:38:43,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:38:43,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1308606064, now seen corresponding path program 21 times [2021-10-21 19:38:43,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:38:43,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98419114] [2021-10-21 19:38:43,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:38:43,024 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:38:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:43,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:38:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:38:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 62 proven. 631 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:38:43,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:38:43,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98419114] [2021-10-21 19:38:43,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98419114] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:43,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555676080] [2021-10-21 19:38:43,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:38:43,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:38:43,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:38:43,908 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:38:43,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-21 19:38:46,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-10-21 19:38:46,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:38:46,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 163 conjunts are in the unsatisfiable core [2021-10-21 19:38:46,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:38:46,434 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:38:46,434 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:38:48,325 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 30 treesize of output 26 [2021-10-21 19:38:48,452 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-10-21 19:38:48,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-10-21 19:38:53,147 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:38:53,148 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 54 treesize of output 50 [2021-10-21 19:38:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 694 backedges. 62 proven. 631 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:38:53,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555676080] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:38:53,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:38:53,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-10-21 19:38:53,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108012352] [2021-10-21 19:38:53,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-21 19:38:53,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:38:53,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-21 19:38:53,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=4124, Unknown=0, NotChecked=0, Total=4290 [2021-10-21 19:38:53,401 INFO L87 Difference]: Start difference. First operand 1258 states and 1393 transitions. Second operand has 66 states, 65 states have (on average 4.476923076923077) internal successors, (291), 63 states have internal predecessors, (291), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:00,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:00,500 INFO L93 Difference]: Finished difference Result 2433 states and 2679 transitions. [2021-10-21 19:39:00,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-10-21 19:39:00,500 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 4.476923076923077) internal successors, (291), 63 states have internal predecessors, (291), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2021-10-21 19:39:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:00,506 INFO L225 Difference]: With dead ends: 2433 [2021-10-21 19:39:00,507 INFO L226 Difference]: Without dead ends: 1275 [2021-10-21 19:39:00,508 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4709 ImplicationChecksByTransitivity, 5606.0ms TimeCoverageRelationStatistics Valid=677, Invalid=17683, Unknown=0, NotChecked=0, Total=18360 [2021-10-21 19:39:00,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-10-21 19:39:00,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1266. [2021-10-21 19:39:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1256 states have (on average 1.10828025477707) internal successors, (1392), 1256 states have internal predecessors, (1392), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1401 transitions. [2021-10-21 19:39:00,525 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1401 transitions. Word has length 154 [2021-10-21 19:39:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:00,526 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1401 transitions. [2021-10-21 19:39:00,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 4.476923076923077) internal successors, (291), 63 states have internal predecessors, (291), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:00,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1401 transitions. [2021-10-21 19:39:00,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-10-21 19:39:00,528 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:00,528 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:00,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:00,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-21 19:39:00,728 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:39:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:00,729 INFO L82 PathProgramCache]: Analyzing trace with hash -508161619, now seen corresponding path program 22 times [2021-10-21 19:39:00,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:00,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143124775] [2021-10-21 19:39:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:00,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:01,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:01,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 200 proven. 538 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:01,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:01,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143124775] [2021-10-21 19:39:01,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143124775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:01,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017329116] [2021-10-21 19:39:01,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:39:01,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:01,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:01,390 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:01,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-21 19:39:03,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:39:03,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:39:03,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 114 conjunts are in the unsatisfiable core [2021-10-21 19:39:03,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 739 backedges. 242 proven. 496 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:04,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017329116] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:04,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:04,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 46 [2021-10-21 19:39:04,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239852797] [2021-10-21 19:39:04,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-21 19:39:04,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:04,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-21 19:39:04,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1868, Unknown=0, NotChecked=0, Total=2162 [2021-10-21 19:39:04,964 INFO L87 Difference]: Start difference. First operand 1266 states and 1401 transitions. Second operand has 47 states, 46 states have (on average 4.695652173913044) internal successors, (216), 44 states have internal predecessors, (216), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:06,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:06,706 INFO L93 Difference]: Finished difference Result 1379 states and 1525 transitions. [2021-10-21 19:39:06,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-21 19:39:06,707 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 4.695652173913044) internal successors, (216), 44 states have internal predecessors, (216), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2021-10-21 19:39:06,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:06,712 INFO L225 Difference]: With dead ends: 1379 [2021-10-21 19:39:06,712 INFO L226 Difference]: Without dead ends: 1379 [2021-10-21 19:39:06,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 1065.5ms TimeCoverageRelationStatistics Valid=428, Invalid=3478, Unknown=0, NotChecked=0, Total=3906 [2021-10-21 19:39:06,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2021-10-21 19:39:06,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1365. [2021-10-21 19:39:06,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1365 states, 1355 states have (on average 1.1084870848708488) internal successors, (1502), 1355 states have internal predecessors, (1502), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:06,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 1511 transitions. [2021-10-21 19:39:06,731 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 1511 transitions. Word has length 158 [2021-10-21 19:39:06,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:06,731 INFO L470 AbstractCegarLoop]: Abstraction has 1365 states and 1511 transitions. [2021-10-21 19:39:06,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 4.695652173913044) internal successors, (216), 44 states have internal predecessors, (216), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:06,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 1511 transitions. [2021-10-21 19:39:06,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-10-21 19:39:06,734 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:06,735 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:06,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:06,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:06,960 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:39:06,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:06,960 INFO L82 PathProgramCache]: Analyzing trace with hash 7398519, now seen corresponding path program 23 times [2021-10-21 19:39:06,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:06,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502354446] [2021-10-21 19:39:06,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:06,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:08,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 68 proven. 760 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:08,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:08,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502354446] [2021-10-21 19:39:08,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502354446] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:08,084 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898614726] [2021-10-21 19:39:08,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:39:08,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:08,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:08,086 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:08,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-21 19:39:10,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-10-21 19:39:10,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:39:10,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 716 conjuncts, 139 conjunts are in the unsatisfiable core [2021-10-21 19:39:10,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:10,977 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:39:10,977 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:39:12,649 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 19:39:12,736 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-21 19:39:12,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-10-21 19:39:15,958 INFO L354 Elim1Store]: treesize reduction 47, result has 17.5 percent of original size [2021-10-21 19:39:15,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 25 [2021-10-21 19:39:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 242 proven. 586 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:16,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898614726] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:16,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:16,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 71 [2021-10-21 19:39:16,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562250712] [2021-10-21 19:39:16,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-10-21 19:39:16,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:16,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-10-21 19:39:16,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=4731, Unknown=0, NotChecked=0, Total=4970 [2021-10-21 19:39:16,436 INFO L87 Difference]: Start difference. First operand 1365 states and 1511 transitions. Second operand has 71 states, 70 states have (on average 4.585714285714285) internal successors, (321), 68 states have internal predecessors, (321), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:28,226 INFO L93 Difference]: Finished difference Result 2757 states and 3025 transitions. [2021-10-21 19:39:28,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-10-21 19:39:28,227 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 4.585714285714285) internal successors, (321), 68 states have internal predecessors, (321), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2021-10-21 19:39:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:28,232 INFO L225 Difference]: With dead ends: 2757 [2021-10-21 19:39:28,232 INFO L226 Difference]: Without dead ends: 1492 [2021-10-21 19:39:28,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6587 ImplicationChecksByTransitivity, 9240.2ms TimeCoverageRelationStatistics Valid=1216, Invalid=27176, Unknown=0, NotChecked=0, Total=28392 [2021-10-21 19:39:28,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2021-10-21 19:39:28,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1385. [2021-10-21 19:39:28,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1374 states have (on average 1.1069868995633187) internal successors, (1521), 1374 states have internal predecessors, (1521), 9 states have call successors, (9), 9 states have call predecessors, (9), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 1531 transitions. [2021-10-21 19:39:28,245 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 1531 transitions. Word has length 166 [2021-10-21 19:39:28,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:28,245 INFO L470 AbstractCegarLoop]: Abstraction has 1385 states and 1531 transitions. [2021-10-21 19:39:28,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 4.585714285714285) internal successors, (321), 68 states have internal predecessors, (321), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 1531 transitions. [2021-10-21 19:39:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-10-21 19:39:28,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:39:28,249 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:39:28,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:28,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-10-21 19:39:28,467 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 9 more)] === [2021-10-21 19:39:28,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:39:28,468 INFO L82 PathProgramCache]: Analyzing trace with hash -528625514, now seen corresponding path program 3 times [2021-10-21 19:39:28,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:39:28,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857609529] [2021-10-21 19:39:28,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:39:28,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:39:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:29,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:39:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:39:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 242 proven. 635 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:39:29,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:39:29,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857609529] [2021-10-21 19:39:29,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857609529] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:29,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473461780] [2021-10-21 19:39:29,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:39:29,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:29,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:39:29,178 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:39:29,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-21 19:39:32,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-10-21 19:39:32,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:39:32,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-21 19:39:32,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:39:32,598 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-21 19:39:32,599 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-10-21 19:39:32,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-21 19:39:33,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-10-21 19:39:33,456 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-10-21 19:39:33,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-10-21 19:39:35,438 INFO L354 Elim1Store]: treesize reduction 45, result has 21.1 percent of original size [2021-10-21 19:39:35,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 32 [2021-10-21 19:39:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 878 backedges. 11 proven. 90 refuted. 0 times theorem prover too weak. 777 trivial. 0 not checked. [2021-10-21 19:39:35,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473461780] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:39:35,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:39:35,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 42 [2021-10-21 19:39:35,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267357524] [2021-10-21 19:39:35,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-21 19:39:35,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:39:35,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-21 19:39:35,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1613, Unknown=0, NotChecked=0, Total=1806 [2021-10-21 19:39:35,640 INFO L87 Difference]: Start difference. First operand 1385 states and 1531 transitions. Second operand has 43 states, 41 states have (on average 4.878048780487805) internal successors, (200), 40 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:42,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:39:42,583 INFO L93 Difference]: Finished difference Result 1486 states and 1627 transitions. [2021-10-21 19:39:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-21 19:39:42,583 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 4.878048780487805) internal successors, (200), 40 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2021-10-21 19:39:42,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:39:42,584 INFO L225 Difference]: With dead ends: 1486 [2021-10-21 19:39:42,584 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:39:42,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 3816.0ms TimeCoverageRelationStatistics Valid=798, Invalid=6858, Unknown=0, NotChecked=0, Total=7656 [2021-10-21 19:39:42,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:39:42,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:39:42,585 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 19:39:42,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:39:42,585 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2021-10-21 19:39:42,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:39:42,585 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:39:42,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 4.878048780487805) internal successors, (200), 40 states have internal predecessors, (200), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-21 19:39:42,585 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:39:42,585 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:39:42,587 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr0REQUIRES_VIOLATION [2021-10-21 19:39:42,587 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr1REQUIRES_VIOLATION [2021-10-21 19:39:42,587 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr2REQUIRES_VIOLATION [2021-10-21 19:39:42,587 INFO L764 garLoopResultBuilder]: Registering result SAFE for location cstrpbrkErr3REQUIRES_VIOLATION [2021-10-21 19:39:42,588 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:39:42,588 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:39:42,588 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-21 19:39:42,588 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-21 19:39:42,588 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4REQUIRES_VIOLATION [2021-10-21 19:39:42,588 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr5REQUIRES_VIOLATION [2021-10-21 19:39:42,588 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr6REQUIRES_VIOLATION [2021-10-21 19:39:42,588 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr7REQUIRES_VIOLATION [2021-10-21 19:39:42,588 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr8ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:39:42,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-21 19:39:42,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:39:42,793 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:39:42,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:39:42 BoogieIcfgContainer [2021-10-21 19:39:42,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:39:42,796 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:39:42,796 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:39:42,796 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:39:42,796 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:34:22" (3/4) ... [2021-10-21 19:39:42,799 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:39:42,805 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 19:39:42,806 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure cstrpbrk [2021-10-21 19:39:42,806 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-21 19:39:42,806 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-21 19:39:42,806 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint16_identity [2021-10-21 19:39:42,806 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint64_identity [2021-10-21 19:39:42,807 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 19:39:42,807 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __uint32_identity [2021-10-21 19:39:42,811 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-21 19:39:42,811 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-21 19:39:42,811 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-21 19:39:42,812 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:39:42,846 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:39:42,846 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:39:42,847 INFO L168 Benchmark]: Toolchain (without parser) took 321966.75 ms. Allocated memory was 92.3 MB in the beginning and 1.0 GB in the end (delta: 947.9 MB). Free memory was 56.6 MB in the beginning and 179.6 MB in the end (delta: -123.0 MB). Peak memory consumption was 826.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:39:42,847 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 92.3 MB. Free memory was 62.2 MB in the beginning and 62.1 MB in the end (delta: 21.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:39:42,848 INFO L168 Benchmark]: CACSL2BoogieTranslator took 475.47 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 56.4 MB in the beginning and 104.1 MB in the end (delta: -47.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:39:42,848 INFO L168 Benchmark]: Boogie Preprocessor took 70.31 ms. Allocated memory is still 134.2 MB. Free memory was 104.1 MB in the beginning and 101.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:39:42,848 INFO L168 Benchmark]: RCFGBuilder took 738.35 ms. Allocated memory is still 134.2 MB. Free memory was 101.1 MB in the beginning and 81.0 MB in the end (delta: 20.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:39:42,849 INFO L168 Benchmark]: TraceAbstraction took 320622.84 ms. Allocated memory was 134.2 MB in the beginning and 1.0 GB in the end (delta: 906.0 MB). Free memory was 80.1 MB in the beginning and 182.4 MB in the end (delta: -102.3 MB). Peak memory consumption was 806.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:39:42,849 INFO L168 Benchmark]: Witness Printer took 50.50 ms. Allocated memory is still 1.0 GB. Free memory was 182.4 MB in the beginning and 179.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:39:42,851 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 92.3 MB. Free memory was 62.2 MB in the beginning and 62.1 MB in the end (delta: 21.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 475.47 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 56.4 MB in the beginning and 104.1 MB in the end (delta: -47.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 70.31 ms. Allocated memory is still 134.2 MB. Free memory was 104.1 MB in the beginning and 101.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 738.35 ms. Allocated memory is still 134.2 MB. Free memory was 101.1 MB in the beginning and 81.0 MB in the end (delta: 20.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 320622.84 ms. Allocated memory was 134.2 MB in the beginning and 1.0 GB in the end (delta: 906.0 MB). Free memory was 80.1 MB in the beginning and 182.4 MB in the end (delta: -102.3 MB). Peak memory consumption was 806.2 MB. Max. memory is 16.1 GB. * Witness Printer took 50.50 ms. Allocated memory is still 1.0 GB. Free memory was 182.4 MB in the beginning and 179.6 MB in the end (delta: 2.7 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: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: 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 9 procedures, 67 locations, 13 error locations. Started 1 CEGAR loops. OverallTime: 320545.1ms, OverallIterations: 53, TraceHistogramMax: 13, EmptinessCheckTime: 83.5ms, AutomataDifference: 191678.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2646 SDtfs, 9019 SDslu, 14078 SDs, 0 SdLazy, 86397 SolverSat, 1463 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 44119.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5052 GetRequests, 2704 SyntacticMatches, 26 SemanticMatches, 2322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40450 ImplicationChecksByTransitivity, 167609.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1385occurred in iteration=52, InterpolantAutomatonStates: 1345, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 619.7ms AutomataMinimizationTime, 53 MinimizatonAttempts, 1118 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 537.2ms SsaConstructionTime, 3464.7ms SatisfiabilityAnalysisTime, 74666.5ms InterpolantComputationTime, 6644 NumberOfCodeBlocks, 6596 NumberOfCodeBlocksAsserted, 204 NumberOfCheckSat, 6550 ConstructedInterpolants, 755 QuantifiedInterpolants, 84091 SizeOfPredicates, 733 NumberOfNonLiveVariables, 13656 ConjunctsInSsa, 2526 ConjunctsInUnsatCore, 94 InterpolantComputations, 14 PerfectInterpolantSequences, 4320/16412 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 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-21 19:39:42,934 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a94826-fb48-4fa3-976e-30e809ab8d8c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...