./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL --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 8e4e2611155a39995b0fc64ec45d64e4c98f789d2737326ee819380629347be0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:19:40,618 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:19:40,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:19:40,652 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:19:40,653 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:19:40,654 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:19:40,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:19:40,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:19:40,660 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:19:40,661 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:19:40,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:19:40,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:19:40,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:19:40,666 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:19:40,667 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:19:40,669 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:19:40,670 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:19:40,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:19:40,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:19:40,675 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:19:40,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:19:40,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:19:40,680 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:19:40,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:19:40,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:19:40,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:19:40,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:19:40,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:19:40,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:19:40,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:19:40,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:19:40,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:19:40,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:19:40,691 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:19:40,692 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:19:40,693 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:19:40,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:19:40,694 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:19:40,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:19:40,695 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:19:40,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:19:40,697 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-19 04:19:40,721 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:19:40,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:19:40,722 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:19:40,723 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:19:40,723 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:19:40,724 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:19:40,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:19:40,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:19:40,725 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:19:40,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:19:40,726 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:19:40,727 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 04:19:40,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:19:40,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:19:40,728 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:19:40,728 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 04:19:40,729 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 04:19:40,729 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 04:19:40,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:19:40,730 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 04:19:40,730 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:19:40,730 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:19:40,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:19:40,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:19:40,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:19:40,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:19:40,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:19:40,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:19:40,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:19:40,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:19:40,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:19:40,733 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_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e4e2611155a39995b0fc64ec45d64e4c98f789d2737326ee819380629347be0 [2021-11-19 04:19:41,007 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:19:41,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:19:41,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:19:41,032 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:19:41,032 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:19:41,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2021-11-19 04:19:41,098 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/data/0620c3e5f/421596065654409393742334a2a90fcc/FLAG4d1b7cf45 [2021-11-19 04:19:41,593 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:19:41,593 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2021-11-19 04:19:41,621 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/data/0620c3e5f/421596065654409393742334a2a90fcc/FLAG4d1b7cf45 [2021-11-19 04:19:41,895 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/data/0620c3e5f/421596065654409393742334a2a90fcc [2021-11-19 04:19:41,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:19:41,899 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 04:19:41,901 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:19:41,901 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:19:41,906 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:19:41,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:19:41" (1/1) ... [2021-11-19 04:19:41,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59e1a2ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:41, skipping insertion in model container [2021-11-19 04:19:41,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:19:41" (1/1) ... [2021-11-19 04:19:41,914 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:19:41,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:19:42,282 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/sv-benchmarks/c/list-simple/dll2n_append_unequal.i[24457,24470] [2021-11-19 04:19:42,290 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:19:42,299 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:19:42,388 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/sv-benchmarks/c/list-simple/dll2n_append_unequal.i[24457,24470] [2021-11-19 04:19:42,398 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:19:42,444 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:19:42,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:42 WrapperNode [2021-11-19 04:19:42,447 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:19:42,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:19:42,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:19:42,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:19:42,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:42" (1/1) ... [2021-11-19 04:19:42,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:42" (1/1) ... [2021-11-19 04:19:42,484 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:42" (1/1) ... [2021-11-19 04:19:42,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:42" (1/1) ... [2021-11-19 04:19:42,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:42" (1/1) ... [2021-11-19 04:19:42,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:42" (1/1) ... [2021-11-19 04:19:42,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:42" (1/1) ... [2021-11-19 04:19:42,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:19:42,542 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:19:42,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:19:42,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:19:42,543 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:42" (1/1) ... [2021-11-19 04:19:42,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:19:42,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:19:42,584 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:19:42,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:19:42,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-19 04:19:42,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:19:42,618 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-19 04:19:42,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-19 04:19:42,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-19 04:19:42,619 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-19 04:19:42,619 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-19 04:19:42,619 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2021-11-19 04:19:42,619 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2021-11-19 04:19:42,619 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_append [2021-11-19 04:19:42,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-19 04:19:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-19 04:19:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-19 04:19:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-19 04:19:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-19 04:19:42,620 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-19 04:19:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:19:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-19 04:19:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-19 04:19:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-19 04:19:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-19 04:19:42,621 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-19 04:19:42,622 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-19 04:19:42,622 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-19 04:19:42,622 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-19 04:19:42,622 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-19 04:19:42,622 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-19 04:19:42,622 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-19 04:19:42,623 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-19 04:19:42,623 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-19 04:19:42,623 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-19 04:19:42,623 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-19 04:19:42,623 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-19 04:19:42,623 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-19 04:19:42,624 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-19 04:19:42,624 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-19 04:19:42,624 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-19 04:19:42,624 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-19 04:19:42,624 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-19 04:19:42,624 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-19 04:19:42,625 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-19 04:19:42,625 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-19 04:19:42,625 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-19 04:19:42,625 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-19 04:19:42,625 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-19 04:19:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-19 04:19:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-19 04:19:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-19 04:19:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-19 04:19:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-19 04:19:42,626 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-19 04:19:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-19 04:19:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-19 04:19:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-19 04:19:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-19 04:19:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-19 04:19:42,627 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-19 04:19:42,628 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-19 04:19:42,628 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-19 04:19:42,628 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-19 04:19:42,628 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-19 04:19:42,628 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-19 04:19:42,628 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-19 04:19:42,629 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-19 04:19:42,629 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-19 04:19:42,629 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-19 04:19:42,629 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-19 04:19:42,629 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-19 04:19:42,630 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-19 04:19:42,630 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-19 04:19:42,630 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-19 04:19:42,630 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-19 04:19:42,630 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-19 04:19:42,630 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-19 04:19:42,631 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-19 04:19:42,631 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-19 04:19:42,631 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-19 04:19:42,631 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-19 04:19:42,631 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-19 04:19:42,631 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-19 04:19:42,632 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-19 04:19:42,632 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-19 04:19:42,632 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-19 04:19:42,632 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-19 04:19:42,632 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-19 04:19:42,632 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-19 04:19:42,633 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-19 04:19:42,633 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-19 04:19:42,633 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-19 04:19:42,633 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-19 04:19:42,633 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-19 04:19:42,633 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-19 04:19:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-19 04:19:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-19 04:19:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-19 04:19:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-19 04:19:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-19 04:19:42,634 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-19 04:19:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-19 04:19:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-19 04:19:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-19 04:19:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-19 04:19:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-19 04:19:42,635 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-19 04:19:42,636 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-19 04:19:42,636 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-19 04:19:42,636 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-19 04:19:42,636 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-19 04:19:42,636 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-19 04:19:42,636 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-19 04:19:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-19 04:19:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-19 04:19:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-19 04:19:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-19 04:19:42,637 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-19 04:19:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-19 04:19:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-19 04:19:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-19 04:19:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-19 04:19:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-19 04:19:42,638 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-19 04:19:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-19 04:19:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-19 04:19:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:19:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 04:19:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:19:42,639 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2021-11-19 04:19:42,646 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2021-11-19 04:19:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 04:19:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:19:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure dll_append [2021-11-19 04:19:42,647 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-19 04:19:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:19:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-19 04:19:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:19:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-19 04:19:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:19:42,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:19:42,887 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:19:42,889 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:19:43,006 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-19 04:19:43,285 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:19:43,294 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:19:43,294 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 04:19:43,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:19:43 BoogieIcfgContainer [2021-11-19 04:19:43,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:19:43,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:19:43,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:19:43,302 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:19:43,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:19:41" (1/3) ... [2021-11-19 04:19:43,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e1f8c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:19:43, skipping insertion in model container [2021-11-19 04:19:43,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:19:42" (2/3) ... [2021-11-19 04:19:43,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70e1f8c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:19:43, skipping insertion in model container [2021-11-19 04:19:43,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:19:43" (3/3) ... [2021-11-19 04:19:43,305 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_append_unequal.i [2021-11-19 04:19:43,311 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:19:43,311 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 47 error locations. [2021-11-19 04:19:43,380 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:19:43,387 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 04:19:43,388 INFO L340 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2021-11-19 04:19:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 110 states have internal predecessors, (125), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:19:43,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 04:19:43,429 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:43,430 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:43,431 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:19:43,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:43,437 INFO L85 PathProgramCache]: Analyzing trace with hash 2080500654, now seen corresponding path program 1 times [2021-11-19 04:19:43,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:43,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144863676] [2021-11-19 04:19:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:43,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:43,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:19:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:43,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:43,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144863676] [2021-11-19 04:19:43,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144863676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:43,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:43,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:19:43,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574942253] [2021-11-19 04:19:43,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:43,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:19:43,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:43,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:19:43,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:19:43,770 INFO L87 Difference]: Start difference. First operand has 125 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 110 states have internal predecessors, (125), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:19:44,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:44,123 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2021-11-19 04:19:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:19:44,129 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-19 04:19:44,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:44,140 INFO L225 Difference]: With dead ends: 122 [2021-11-19 04:19:44,140 INFO L226 Difference]: Without dead ends: 116 [2021-11-19 04:19:44,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:19:44,148 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 123 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:44,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 132 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:19:44,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-19 04:19:44,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-11-19 04:19:44,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 60 states have (on average 1.8666666666666667) internal successors, (112), 103 states have internal predecessors, (112), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:19:44,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2021-11-19 04:19:44,205 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 13 [2021-11-19 04:19:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:44,205 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2021-11-19 04:19:44,206 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:19:44,206 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2021-11-19 04:19:44,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 04:19:44,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:44,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:44,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:19:44,208 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:19:44,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:44,208 INFO L85 PathProgramCache]: Analyzing trace with hash 2080500655, now seen corresponding path program 1 times [2021-11-19 04:19:44,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:44,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677250204] [2021-11-19 04:19:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:44,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:44,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:44,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:19:44,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:44,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:44,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677250204] [2021-11-19 04:19:44,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677250204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:44,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:44,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:19:44,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456831016] [2021-11-19 04:19:44,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:44,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:19:44,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:44,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:19:44,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:19:44,367 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:19:44,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:44,584 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2021-11-19 04:19:44,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:19:44,585 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-19 04:19:44,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:44,589 INFO L225 Difference]: With dead ends: 113 [2021-11-19 04:19:44,589 INFO L226 Difference]: Without dead ends: 113 [2021-11-19 04:19:44,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:19:44,592 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 112 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:44,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 123 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:19:44,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-19 04:19:44,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-19 04:19:44,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 60 states have (on average 1.8166666666666667) internal successors, (109), 100 states have internal predecessors, (109), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:19:44,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2021-11-19 04:19:44,604 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 13 [2021-11-19 04:19:44,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:44,604 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2021-11-19 04:19:44,605 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:19:44,605 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2021-11-19 04:19:44,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 04:19:44,606 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:44,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:44,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:19:44,607 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dll_createErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:19:44,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:44,608 INFO L85 PathProgramCache]: Analyzing trace with hash 805126828, now seen corresponding path program 1 times [2021-11-19 04:19:44,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:44,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717814278] [2021-11-19 04:19:44,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:44,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:44,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:44,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:19:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:44,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:19:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:44,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:44,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:44,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717814278] [2021-11-19 04:19:44,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717814278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:44,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:44,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:19:44,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200977599] [2021-11-19 04:19:44,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:44,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:19:44,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:44,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:19:44,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:19:44,822 INFO L87 Difference]: Start difference. First operand 113 states and 122 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:19:45,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:45,347 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2021-11-19 04:19:45,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:19:45,347 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-19 04:19:45,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:45,351 INFO L225 Difference]: With dead ends: 129 [2021-11-19 04:19:45,351 INFO L226 Difference]: Without dead ends: 129 [2021-11-19 04:19:45,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:19:45,353 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 155 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:45,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 120 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:19:45,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-19 04:19:45,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 111. [2021-11-19 04:19:45,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 60 states have (on average 1.7833333333333334) internal successors, (107), 98 states have internal predecessors, (107), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:19:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2021-11-19 04:19:45,379 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 20 [2021-11-19 04:19:45,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:45,379 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2021-11-19 04:19:45,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:19:45,380 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2021-11-19 04:19:45,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-19 04:19:45,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:45,382 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:45,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:19:45,382 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_createErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:19:45,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:45,383 INFO L85 PathProgramCache]: Analyzing trace with hash 805126829, now seen corresponding path program 1 times [2021-11-19 04:19:45,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:45,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890291592] [2021-11-19 04:19:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:45,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:45,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:45,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:19:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:45,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:19:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:45,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:45,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890291592] [2021-11-19 04:19:45,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890291592] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:45,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:45,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:19:45,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404670193] [2021-11-19 04:19:45,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:45,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:19:45,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:45,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:19:45,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:19:45,618 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:19:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:46,121 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2021-11-19 04:19:46,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:19:46,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-11-19 04:19:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:46,123 INFO L225 Difference]: With dead ends: 127 [2021-11-19 04:19:46,123 INFO L226 Difference]: Without dead ends: 127 [2021-11-19 04:19:46,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:19:46,126 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 150 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:46,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 120 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:19:46,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-19 04:19:46,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2021-11-19 04:19:46,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 60 states have (on average 1.75) internal successors, (105), 96 states have internal predecessors, (105), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-19 04:19:46,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2021-11-19 04:19:46,136 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 20 [2021-11-19 04:19:46,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:46,136 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2021-11-19 04:19:46,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-19 04:19:46,137 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2021-11-19 04:19:46,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 04:19:46,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:46,144 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:46,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:19:46,145 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dll_createErr4REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:19:46,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:46,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1858859150, now seen corresponding path program 1 times [2021-11-19 04:19:46,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:46,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792666049] [2021-11-19 04:19:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:46,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:46,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:19:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:46,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:19:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:46,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:46,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792666049] [2021-11-19 04:19:46,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792666049] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:46,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:46,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:19:46,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893695230] [2021-11-19 04:19:46,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:46,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:19:46,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:46,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:19:46,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:19:46,252 INFO L87 Difference]: Start difference. First operand 109 states and 118 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:19:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:46,556 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2021-11-19 04:19:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 04:19:46,556 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-11-19 04:19:46,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:46,558 INFO L225 Difference]: With dead ends: 132 [2021-11-19 04:19:46,558 INFO L226 Difference]: Without dead ends: 132 [2021-11-19 04:19:46,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:19:46,560 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 146 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:46,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 111 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:19:46,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-19 04:19:46,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 115. [2021-11-19 04:19:46,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 65 states have (on average 1.7076923076923076) internal successors, (111), 101 states have internal predecessors, (111), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:19:46,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-11-19 04:19:46,572 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 23 [2021-11-19 04:19:46,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:46,572 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-11-19 04:19:46,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 3 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 04:19:46,573 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-11-19 04:19:46,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-19 04:19:46,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:46,574 INFO L514 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] [2021-11-19 04:19:46,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 04:19:46,575 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_appendErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:19:46,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:46,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1775503700, now seen corresponding path program 1 times [2021-11-19 04:19:46,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:46,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434674482] [2021-11-19 04:19:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:46,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:46,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:46,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:19:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:46,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:19:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:46,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-19 04:19:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:46,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:46,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434674482] [2021-11-19 04:19:46,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434674482] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:19:46,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:19:46,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:19:46,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517689200] [2021-11-19 04:19:46,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:19:46,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 04:19:46,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:46,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 04:19:46,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:19:46,687 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:19:47,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:47,061 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2021-11-19 04:19:47,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:19:47,062 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-11-19 04:19:47,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:47,063 INFO L225 Difference]: With dead ends: 132 [2021-11-19 04:19:47,064 INFO L226 Difference]: Without dead ends: 129 [2021-11-19 04:19:47,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:19:47,065 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 186 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:47,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 123 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:19:47,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-19 04:19:47,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 115. [2021-11-19 04:19:47,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 65 states have (on average 1.6923076923076923) internal successors, (110), 101 states have internal predecessors, (110), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:19:47,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2021-11-19 04:19:47,074 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 26 [2021-11-19 04:19:47,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:47,075 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2021-11-19 04:19:47,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 04:19:47,075 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2021-11-19 04:19:47,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 04:19:47,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:47,077 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:19:47,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 04:19:47,078 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_createErr4REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:19:47,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:47,078 INFO L85 PathProgramCache]: Analyzing trace with hash -71067773, now seen corresponding path program 1 times [2021-11-19 04:19:47,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:47,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558376229] [2021-11-19 04:19:47,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:47,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:47,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:19:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:47,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:19:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:47,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:19:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:19:47,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:47,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558376229] [2021-11-19 04:19:47,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558376229] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:19:47,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052502208] [2021-11-19 04:19:47,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:47,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:19:47,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:19:47,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:19:47,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:19:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:47,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-19 04:19:47,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:19:47,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:19:47,802 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 04:19:47,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-19 04:19:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:47,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:19:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:48,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052502208] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:19:48,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:19:48,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2021-11-19 04:19:48,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083406176] [2021-11-19 04:19:48,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:19:48,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 04:19:48,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:48,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 04:19:48,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-11-19 04:19:48,481 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 21 states, 20 states have (on average 2.6) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:19:49,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:49,361 INFO L93 Difference]: Finished difference Result 128 states and 139 transitions. [2021-11-19 04:19:49,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:19:49,362 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2021-11-19 04:19:49,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:49,363 INFO L225 Difference]: With dead ends: 128 [2021-11-19 04:19:49,363 INFO L226 Difference]: Without dead ends: 128 [2021-11-19 04:19:49,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-11-19 04:19:49,365 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 151 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:49,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 134 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1208 Invalid, 0 Unknown, 315 Unchecked, 0.7s Time] [2021-11-19 04:19:49,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-19 04:19:49,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2021-11-19 04:19:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.676923076923077) internal successors, (109), 100 states have internal predecessors, (109), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:19:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2021-11-19 04:19:49,386 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 38 [2021-11-19 04:19:49,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:49,386 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2021-11-19 04:19:49,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.6) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:19:49,387 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2021-11-19 04:19:49,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 04:19:49,388 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:49,388 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 04:19:49,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-19 04:19:49,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-19 04:19:49,611 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_createErr5REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:19:49,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:49,612 INFO L85 PathProgramCache]: Analyzing trace with hash -71067772, now seen corresponding path program 1 times [2021-11-19 04:19:49,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:49,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752611331] [2021-11-19 04:19:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:49,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:49,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:19:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:49,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-19 04:19:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:49,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-19 04:19:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:19:49,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:49,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752611331] [2021-11-19 04:19:49,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752611331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:19:49,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126493666] [2021-11-19 04:19:49,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:49,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:19:49,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:19:49,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:19:49,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:19:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:49,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-19 04:19:49,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:19:50,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:19:50,234 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-19 04:19:50,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 9 [2021-11-19 04:19:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:50,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:19:50,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126493666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:19:50,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:19:50,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-19 04:19:50,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640114229] [2021-11-19 04:19:50,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:19:50,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 04:19:50,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:50,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 04:19:50,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:19:50,420 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 04:19:51,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:51,530 INFO L93 Difference]: Finished difference Result 132 states and 145 transitions. [2021-11-19 04:19:51,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 04:19:51,530 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-11-19 04:19:51,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:51,532 INFO L225 Difference]: With dead ends: 132 [2021-11-19 04:19:51,532 INFO L226 Difference]: Without dead ends: 132 [2021-11-19 04:19:51,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-11-19 04:19:51,534 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 259 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:51,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 120 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:19:51,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-19 04:19:51,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 113. [2021-11-19 04:19:51,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 99 states have internal predecessors, (108), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:19:51,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2021-11-19 04:19:51,542 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 38 [2021-11-19 04:19:51,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:51,543 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2021-11-19 04:19:51,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 11 states have internal predecessors, (46), 3 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 04:19:51,543 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2021-11-19 04:19:51,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 04:19:51,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:51,545 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:19:51,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:19:51,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:19:51,759 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_appendErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:19:51,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:51,759 INFO L85 PathProgramCache]: Analyzing trace with hash -21021789, now seen corresponding path program 1 times [2021-11-19 04:19:51,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:51,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731184300] [2021-11-19 04:19:51,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:51,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:51,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:19:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:51,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:19:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:51,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:19:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:51,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-19 04:19:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:19:51,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:51,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731184300] [2021-11-19 04:19:51,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731184300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:19:51,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491283204] [2021-11-19 04:19:51,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:51,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:19:51,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:19:51,917 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:19:51,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:19:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:52,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-19 04:19:52,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:19:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:19:52,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:19:52,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:19:52,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491283204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:19:52,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:19:52,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2021-11-19 04:19:52,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868567630] [2021-11-19 04:19:52,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:19:52,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:19:52,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:52,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:19:52,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:19:52,381 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 12 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-19 04:19:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:52,835 INFO L93 Difference]: Finished difference Result 138 states and 151 transitions. [2021-11-19 04:19:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:19:52,836 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2021-11-19 04:19:52,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:52,837 INFO L225 Difference]: With dead ends: 138 [2021-11-19 04:19:52,837 INFO L226 Difference]: Without dead ends: 135 [2021-11-19 04:19:52,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:19:52,839 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 251 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:52,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 121 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:19:52,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-19 04:19:52,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 115. [2021-11-19 04:19:52,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 101 states have internal predecessors, (110), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:19:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2021-11-19 04:19:52,849 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 41 [2021-11-19 04:19:52,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:52,850 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2021-11-19 04:19:52,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-19 04:19:52,850 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2021-11-19 04:19:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-19 04:19:52,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:52,852 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-19 04:19:52,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:19:53,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:19:53,053 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_appendErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:19:53,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:53,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1345502860, now seen corresponding path program 2 times [2021-11-19 04:19:53,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:53,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310238361] [2021-11-19 04:19:53,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:53,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:53,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:19:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:53,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:19:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:53,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:19:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:53,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:19:53,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:53,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-19 04:19:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:19:53,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:53,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310238361] [2021-11-19 04:19:53,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310238361] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:19:53,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143396699] [2021-11-19 04:19:53,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:19:53,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:19:53,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:19:53,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:19:53,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:19:53,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:19:53,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:19:53,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 04:19:53,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:19:53,523 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:19:53,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:19:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:19:53,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143396699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:19:53,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 04:19:53,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 9 [2021-11-19 04:19:53,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97481784] [2021-11-19 04:19:53,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 04:19:53,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:19:53,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:19:53,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:19:53,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:19:53,759 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 04:19:54,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:19:54,263 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2021-11-19 04:19:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:19:54,264 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 56 [2021-11-19 04:19:54,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:19:54,265 INFO L225 Difference]: With dead ends: 128 [2021-11-19 04:19:54,265 INFO L226 Difference]: Without dead ends: 128 [2021-11-19 04:19:54,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:19:54,266 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 142 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:19:54,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 139 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:19:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-19 04:19:54,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 115. [2021-11-19 04:19:54,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 67 states have (on average 1.626865671641791) internal successors, (109), 101 states have internal predecessors, (109), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-19 04:19:54,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2021-11-19 04:19:54,272 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 56 [2021-11-19 04:19:54,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:19:54,272 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2021-11-19 04:19:54,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-19 04:19:54,273 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2021-11-19 04:19:54,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 04:19:54,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:19:54,280 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1] [2021-11-19 04:19:54,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:19:54,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-19 04:19:54,493 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting dll_appendErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:19:54,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:19:54,494 INFO L85 PathProgramCache]: Analyzing trace with hash 451161686, now seen corresponding path program 1 times [2021-11-19 04:19:54,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:19:54,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065166189] [2021-11-19 04:19:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:54,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:19:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:54,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:19:54,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:54,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:19:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:54,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:19:54,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:54,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:19:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:54,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:19:54,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:54,993 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:19:54,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:19:54,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065166189] [2021-11-19 04:19:54,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065166189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:19:54,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775709261] [2021-11-19 04:19:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:19:54,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:19:54,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:19:54,996 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:19:55,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:19:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:19:55,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 04:19:55,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:19:55,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:19:55,178 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 11 treesize of output 9 [2021-11-19 04:19:55,772 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-19 04:19:55,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 24 [2021-11-19 04:19:58,043 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-19 04:19:58,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 27 [2021-11-19 04:20:00,102 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:20:00,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:20:04,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775709261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:20:04,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:20:04,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-11-19 04:20:04,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128608452] [2021-11-19 04:20:04,486 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:20:04,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 04:20:04,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:04,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 04:20:04,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=599, Unknown=3, NotChecked=0, Total=702 [2021-11-19 04:20:04,488 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 25 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 20 states have internal predecessors, (80), 9 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-19 04:20:05,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:20:05,579 INFO L93 Difference]: Finished difference Result 164 states and 181 transitions. [2021-11-19 04:20:05,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 04:20:05,581 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 20 states have internal predecessors, (80), 9 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 57 [2021-11-19 04:20:05,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:20:05,583 INFO L225 Difference]: With dead ends: 164 [2021-11-19 04:20:05,583 INFO L226 Difference]: Without dead ends: 164 [2021-11-19 04:20:05,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=201, Invalid=1128, Unknown=3, NotChecked=0, Total=1332 [2021-11-19 04:20:05,585 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 175 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 436 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:20:05,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 292 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 827 Invalid, 0 Unknown, 436 Unchecked, 0.7s Time] [2021-11-19 04:20:05,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-19 04:20:05,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 143. [2021-11-19 04:20:05,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 90 states have (on average 1.5222222222222221) internal successors, (137), 124 states have internal predecessors, (137), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:20:05,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2021-11-19 04:20:05,593 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 57 [2021-11-19 04:20:05,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:20:05,593 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2021-11-19 04:20:05,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 20 states have internal predecessors, (80), 9 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-19 04:20:05,594 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2021-11-19 04:20:05,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-19 04:20:05,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:20:05,595 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1] [2021-11-19 04:20:05,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:20:05,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:20:05,809 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting dll_appendErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:20:05,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:20:05,810 INFO L85 PathProgramCache]: Analyzing trace with hash 451161687, now seen corresponding path program 1 times [2021-11-19 04:20:05,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:20:05,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333018442] [2021-11-19 04:20:05,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:05,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:05,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:20:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:05,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:20:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:06,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:20:06,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:06,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:20:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:06,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:20:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:20:06,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:20:06,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333018442] [2021-11-19 04:20:06,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333018442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:20:06,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193369040] [2021-11-19 04:20:06,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:06,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:20:06,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:20:06,420 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:20:06,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:20:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:06,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 04:20:06,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:20:06,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:20:06,658 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 9 treesize of output 7 [2021-11-19 04:20:07,202 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-19 04:20:07,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-11-19 04:20:07,455 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-19 04:20:07,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 31 [2021-11-19 04:20:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-19 04:20:07,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:20:07,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193369040] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:20:07,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:20:07,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2021-11-19 04:20:07,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660567687] [2021-11-19 04:20:07,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:20:07,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-19 04:20:07,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:07,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-19 04:20:07,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2021-11-19 04:20:07,641 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand has 24 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 20 states have internal predecessors, (74), 10 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 04:20:08,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:20:08,453 INFO L93 Difference]: Finished difference Result 168 states and 186 transitions. [2021-11-19 04:20:08,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:20:08,454 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 20 states have internal predecessors, (74), 10 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 57 [2021-11-19 04:20:08,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:20:08,456 INFO L225 Difference]: With dead ends: 168 [2021-11-19 04:20:08,456 INFO L226 Difference]: Without dead ends: 168 [2021-11-19 04:20:08,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-11-19 04:20:08,457 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 207 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:20:08,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 243 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 862 Invalid, 0 Unknown, 257 Unchecked, 0.7s Time] [2021-11-19 04:20:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-19 04:20:08,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 151. [2021-11-19 04:20:08,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 97 states have (on average 1.4742268041237114) internal successors, (143), 131 states have internal predecessors, (143), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:20:08,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 165 transitions. [2021-11-19 04:20:08,469 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 165 transitions. Word has length 57 [2021-11-19 04:20:08,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:20:08,470 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 165 transitions. [2021-11-19 04:20:08,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 20 states have internal predecessors, (74), 10 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 04:20:08,471 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 165 transitions. [2021-11-19 04:20:08,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 04:20:08,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:20:08,474 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2021-11-19 04:20:08,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:20:08,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-19 04:20:08,693 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting dll_appendErr4REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:20:08,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:20:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash -225315977, now seen corresponding path program 1 times [2021-11-19 04:20:08,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:20:08,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872956133] [2021-11-19 04:20:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:08,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:08,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:20:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:08,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:20:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:08,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:20:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:08,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:20:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:08,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:20:08,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 04:20:08,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:20:08,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872956133] [2021-11-19 04:20:08,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872956133] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:20:08,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:20:08,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:20:08,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126640561] [2021-11-19 04:20:08,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:20:08,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:20:08,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:08,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:20:08,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:20:08,785 INFO L87 Difference]: Start difference. First operand 151 states and 165 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:20:09,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:20:09,035 INFO L93 Difference]: Finished difference Result 162 states and 177 transitions. [2021-11-19 04:20:09,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:20:09,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2021-11-19 04:20:09,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:20:09,037 INFO L225 Difference]: With dead ends: 162 [2021-11-19 04:20:09,037 INFO L226 Difference]: Without dead ends: 162 [2021-11-19 04:20:09,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:20:09,038 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 149 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:20:09,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 95 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:20:09,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-19 04:20:09,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 146. [2021-11-19 04:20:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 94 states have (on average 1.4361702127659575) internal successors, (135), 126 states have internal predecessors, (135), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:20:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 157 transitions. [2021-11-19 04:20:09,048 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 157 transitions. Word has length 59 [2021-11-19 04:20:09,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:20:09,048 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 157 transitions. [2021-11-19 04:20:09,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:20:09,049 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 157 transitions. [2021-11-19 04:20:09,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 04:20:09,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:20:09,054 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2021-11-19 04:20:09,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 04:20:09,055 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting dll_appendErr5REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:20:09,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:20:09,055 INFO L85 PathProgramCache]: Analyzing trace with hash -225315976, now seen corresponding path program 1 times [2021-11-19 04:20:09,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:20:09,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555022985] [2021-11-19 04:20:09,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:09,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:09,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:09,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:20:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:09,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:20:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:09,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:20:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:09,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:20:09,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:09,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:20:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 04:20:09,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:20:09,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555022985] [2021-11-19 04:20:09,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555022985] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:20:09,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:20:09,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:20:09,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8767742] [2021-11-19 04:20:09,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:20:09,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:20:09,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:09,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:20:09,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:20:09,191 INFO L87 Difference]: Start difference. First operand 146 states and 157 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:20:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:20:09,631 INFO L93 Difference]: Finished difference Result 157 states and 169 transitions. [2021-11-19 04:20:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:20:09,632 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2021-11-19 04:20:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:20:09,633 INFO L225 Difference]: With dead ends: 157 [2021-11-19 04:20:09,635 INFO L226 Difference]: Without dead ends: 157 [2021-11-19 04:20:09,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:20:09,636 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 209 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:20:09,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 110 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:20:09,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-19 04:20:09,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 144. [2021-11-19 04:20:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 94 states have (on average 1.4148936170212767) internal successors, (133), 124 states have internal predecessors, (133), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:20:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 155 transitions. [2021-11-19 04:20:09,644 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 155 transitions. Word has length 59 [2021-11-19 04:20:09,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:20:09,645 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 155 transitions. [2021-11-19 04:20:09,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:20:09,645 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 155 transitions. [2021-11-19 04:20:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 04:20:09,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:20:09,646 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1] [2021-11-19 04:20:09,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 04:20:09,647 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting dll_appendErr6REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:20:09,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:20:09,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1780288292, now seen corresponding path program 1 times [2021-11-19 04:20:09,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:20:09,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664349887] [2021-11-19 04:20:09,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:09,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:09,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:09,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:20:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:09,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:20:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:09,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:20:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:09,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:20:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:09,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:20:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 04:20:10,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:20:10,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664349887] [2021-11-19 04:20:10,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664349887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:20:10,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076131481] [2021-11-19 04:20:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:10,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:20:10,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:20:10,181 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:20:10,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:20:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:10,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 04:20:10,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:20:10,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-19 04:20:17,143 INFO L354 Elim1Store]: treesize reduction 187, result has 12.2 percent of original size [2021-11-19 04:20:17,143 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 3 case distinctions, treesize of input 51 treesize of output 47 [2021-11-19 04:20:17,168 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-19 04:20:17,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 52 [2021-11-19 04:20:17,421 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-19 04:20:17,422 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 53 treesize of output 29 [2021-11-19 04:20:17,571 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 04:20:17,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:20:17,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076131481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:20:17,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:20:17,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [20] total 33 [2021-11-19 04:20:17,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342985077] [2021-11-19 04:20:17,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:20:17,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-19 04:20:17,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:17,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-19 04:20:17,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1021, Unknown=3, NotChecked=0, Total=1122 [2021-11-19 04:20:17,574 INFO L87 Difference]: Start difference. First operand 144 states and 155 transitions. Second operand has 18 states, 14 states have (on average 2.857142857142857) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:20:18,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:20:18,351 INFO L93 Difference]: Finished difference Result 158 states and 171 transitions. [2021-11-19 04:20:18,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 04:20:18,352 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.857142857142857) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2021-11-19 04:20:18,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:20:18,354 INFO L225 Difference]: With dead ends: 158 [2021-11-19 04:20:18,354 INFO L226 Difference]: Without dead ends: 158 [2021-11-19 04:20:18,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=124, Invalid=1279, Unknown=3, NotChecked=0, Total=1406 [2021-11-19 04:20:18,356 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 63 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:20:18,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 675 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 698 Invalid, 0 Unknown, 269 Unchecked, 0.6s Time] [2021-11-19 04:20:18,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-19 04:20:18,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 145. [2021-11-19 04:20:18,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 125 states have internal predecessors, (135), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:20:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2021-11-19 04:20:18,363 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 61 [2021-11-19 04:20:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:20:18,364 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2021-11-19 04:20:18,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.857142857142857) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:20:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2021-11-19 04:20:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-19 04:20:18,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:20:18,365 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1] [2021-11-19 04:20:18,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 04:20:18,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-19 04:20:18,581 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting dll_appendErr7REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:20:18,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:20:18,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1780288291, now seen corresponding path program 1 times [2021-11-19 04:20:18,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:20:18,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972965881] [2021-11-19 04:20:18,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:18,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:18,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:20:18,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:18,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:20:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:18,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:20:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:18,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:20:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:19,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:20:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:20:19,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:20:19,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972965881] [2021-11-19 04:20:19,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972965881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:20:19,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203942516] [2021-11-19 04:20:19,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:19,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:20:19,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:20:19,884 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:20:19,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:20:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:20,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-19 04:20:20,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:20:20,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:20:20,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-19 04:20:20,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-19 04:20:23,085 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int)) (let ((.cse0 (+ node_create_~temp~0.offset 4)) (.cse1 (+ node_create_~temp~0.offset 8))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base) .cse0 0) .cse1 0) node_create_~temp~0.offset (select (select |c_#memory_$Pointer$.offset| node_create_~temp~0.base) node_create_~temp~0.offset)))) (= (select |c_old(#valid)| node_create_~temp~0.base) 0) (< node_create_~temp~0.base |c_#StackHeapBarrier|) (= |c_#length| (store |c_old(#length)| node_create_~temp~0.base 12)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) .cse0 0) .cse1 0) node_create_~temp~0.offset (select (select |c_#memory_$Pointer$.base| node_create_~temp~0.base) node_create_~temp~0.offset))))))) is different from true [2021-11-19 04:20:23,275 INFO L354 Elim1Store]: treesize reduction 187, result has 12.2 percent of original size [2021-11-19 04:20:23,276 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 3 case distinctions, treesize of input 92 treesize of output 88 [2021-11-19 04:20:23,338 INFO L354 Elim1Store]: treesize reduction 187, result has 12.2 percent of original size [2021-11-19 04:20:23,338 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 3 case distinctions, treesize of input 85 treesize of output 77 [2021-11-19 04:20:23,351 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-19 04:20:23,351 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 78 treesize of output 78 [2021-11-19 04:20:23,368 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-19 04:20:23,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 74 [2021-11-19 04:20:23,744 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-19 04:20:23,745 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 85 treesize of output 61 [2021-11-19 04:20:23,757 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-19 04:20:23,757 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 52 treesize of output 32 [2021-11-19 04:20:23,935 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2021-11-19 04:20:23,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:20:30,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203942516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:20:30,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:20:30,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2021-11-19 04:20:30,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608282833] [2021-11-19 04:20:30,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:20:30,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-19 04:20:30,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:30,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-19 04:20:30,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1440, Unknown=3, NotChecked=76, Total=1640 [2021-11-19 04:20:30,819 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 37 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-19 04:20:45,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:20:45,120 INFO L93 Difference]: Finished difference Result 160 states and 173 transitions. [2021-11-19 04:20:45,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 04:20:45,121 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 61 [2021-11-19 04:20:45,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:20:45,122 INFO L225 Difference]: With dead ends: 160 [2021-11-19 04:20:45,122 INFO L226 Difference]: Without dead ends: 160 [2021-11-19 04:20:45,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=246, Invalid=2832, Unknown=6, NotChecked=108, Total=3192 [2021-11-19 04:20:45,124 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 223 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-11-19 04:20:45,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 263 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1757 Invalid, 0 Unknown, 219 Unchecked, 3.7s Time] [2021-11-19 04:20:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-19 04:20:45,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 145. [2021-11-19 04:20:45,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 95 states have (on average 1.4105263157894736) internal successors, (134), 125 states have internal predecessors, (134), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:20:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 156 transitions. [2021-11-19 04:20:45,132 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 156 transitions. Word has length 61 [2021-11-19 04:20:45,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:20:45,133 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 156 transitions. [2021-11-19 04:20:45,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 30 states have (on average 2.533333333333333) internal successors, (76), 29 states have internal predecessors, (76), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-19 04:20:45,133 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 156 transitions. [2021-11-19 04:20:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 04:20:45,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:20:45,134 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-11-19 04:20:45,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:20:45,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-19 04:20:45,349 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:20:45,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:20:45,350 INFO L85 PathProgramCache]: Analyzing trace with hash 640902066, now seen corresponding path program 1 times [2021-11-19 04:20:45,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:20:45,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707587256] [2021-11-19 04:20:45,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:45,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:45,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:20:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:45,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:20:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:45,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:20:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:45,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:20:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:45,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:20:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:45,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:20:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:45,625 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 04:20:45,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:20:45,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707587256] [2021-11-19 04:20:45,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707587256] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:20:45,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:20:45,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:20:45,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476178281] [2021-11-19 04:20:45,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:20:45,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:20:45,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:45,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:20:45,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:20:45,629 INFO L87 Difference]: Start difference. First operand 145 states and 156 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:20:46,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:20:46,623 INFO L93 Difference]: Finished difference Result 157 states and 169 transitions. [2021-11-19 04:20:46,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:20:46,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2021-11-19 04:20:46,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:20:46,625 INFO L225 Difference]: With dead ends: 157 [2021-11-19 04:20:46,626 INFO L226 Difference]: Without dead ends: 157 [2021-11-19 04:20:46,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:20:46,627 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 200 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:20:46,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 82 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 04:20:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-19 04:20:46,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 143. [2021-11-19 04:20:46,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 95 states have (on average 1.3894736842105264) internal successors, (132), 123 states have internal predecessors, (132), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:20:46,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 154 transitions. [2021-11-19 04:20:46,634 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 154 transitions. Word has length 62 [2021-11-19 04:20:46,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:20:46,635 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 154 transitions. [2021-11-19 04:20:46,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:20:46,636 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 154 transitions. [2021-11-19 04:20:46,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 04:20:46,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:20:46,637 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-11-19 04:20:46,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 04:20:46,637 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:20:46,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:20:46,638 INFO L85 PathProgramCache]: Analyzing trace with hash 640902067, now seen corresponding path program 1 times [2021-11-19 04:20:46,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:20:46,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745078783] [2021-11-19 04:20:46,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:46,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:46,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:20:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:46,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:20:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:46,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:20:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:46,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:20:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:46,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:20:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:46,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:20:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 04:20:46,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:20:46,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745078783] [2021-11-19 04:20:46,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745078783] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:20:46,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:20:46,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:20:46,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393251521] [2021-11-19 04:20:46,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:20:46,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:20:46,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:46,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:20:46,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:20:46,966 INFO L87 Difference]: Start difference. First operand 143 states and 154 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 04:20:48,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:20:48,087 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2021-11-19 04:20:48,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 04:20:48,088 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 62 [2021-11-19 04:20:48,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:20:48,089 INFO L225 Difference]: With dead ends: 154 [2021-11-19 04:20:48,089 INFO L226 Difference]: Without dead ends: 154 [2021-11-19 04:20:48,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:20:48,093 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 225 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 04:20:48,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 86 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 04:20:48,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-19 04:20:48,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 141. [2021-11-19 04:20:48,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 95 states have (on average 1.368421052631579) internal successors, (130), 121 states have internal predecessors, (130), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:20:48,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2021-11-19 04:20:48,103 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 62 [2021-11-19 04:20:48,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:20:48,104 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2021-11-19 04:20:48,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-19 04:20:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2021-11-19 04:20:48,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 04:20:48,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:20:48,106 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:20:48,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 04:20:48,106 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting dll_appendErr10REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:20:48,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:20:48,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1460063674, now seen corresponding path program 1 times [2021-11-19 04:20:48,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:20:48,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980704844] [2021-11-19 04:20:48,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:48,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:48,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:20:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:48,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:20:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:48,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:20:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:48,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:20:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:48,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:20:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 04:20:48,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:20:48,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980704844] [2021-11-19 04:20:48,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980704844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:20:48,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:20:48,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:20:48,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511832147] [2021-11-19 04:20:48,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:20:48,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:20:48,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:48,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:20:48,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:20:48,272 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:20:48,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:20:48,829 INFO L93 Difference]: Finished difference Result 154 states and 167 transitions. [2021-11-19 04:20:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:20:48,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2021-11-19 04:20:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:20:48,831 INFO L225 Difference]: With dead ends: 154 [2021-11-19 04:20:48,831 INFO L226 Difference]: Without dead ends: 154 [2021-11-19 04:20:48,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:20:48,832 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 128 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 04:20:48,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 94 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 04:20:48,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-19 04:20:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 139. [2021-11-19 04:20:48,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 95 states have (on average 1.3473684210526315) internal successors, (128), 119 states have internal predecessors, (128), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:20:48,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2021-11-19 04:20:48,840 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 63 [2021-11-19 04:20:48,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:20:48,841 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2021-11-19 04:20:48,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:20:48,841 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2021-11-19 04:20:48,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 04:20:48,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:20:48,843 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:20:48,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 04:20:48,843 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting dll_appendErr11REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:20:48,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:20:48,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1460063673, now seen corresponding path program 1 times [2021-11-19 04:20:48,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:20:48,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541434698] [2021-11-19 04:20:48,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:48,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:48,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:20:48,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:48,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:20:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:48,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:20:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:49,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:20:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:49,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:20:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 04:20:49,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:20:49,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541434698] [2021-11-19 04:20:49,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541434698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:20:49,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:20:49,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:20:49,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113156664] [2021-11-19 04:20:49,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:20:49,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:20:49,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:49,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:20:49,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:20:49,016 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:20:49,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:20:49,738 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2021-11-19 04:20:49,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:20:49,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2021-11-19 04:20:49,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:20:49,740 INFO L225 Difference]: With dead ends: 152 [2021-11-19 04:20:49,740 INFO L226 Difference]: Without dead ends: 152 [2021-11-19 04:20:49,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 04:20:49,741 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 124 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:20:49,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 94 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 04:20:49,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-19 04:20:49,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 137. [2021-11-19 04:20:49,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 95 states have (on average 1.3263157894736841) internal successors, (126), 117 states have internal predecessors, (126), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:20:49,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 148 transitions. [2021-11-19 04:20:49,749 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 148 transitions. Word has length 63 [2021-11-19 04:20:49,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:20:49,750 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 148 transitions. [2021-11-19 04:20:49,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:20:49,750 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 148 transitions. [2021-11-19 04:20:49,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 04:20:49,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:20:49,751 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:20:49,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 04:20:49,752 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting dll_appendErr13REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:20:49,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:20:49,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1982666411, now seen corresponding path program 1 times [2021-11-19 04:20:49,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:20:49,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215500712] [2021-11-19 04:20:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:49,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:49,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:20:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:49,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:20:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:49,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:20:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:49,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:20:49,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:49,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:20:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:50,138 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 04:20:50,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:20:50,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215500712] [2021-11-19 04:20:50,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215500712] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:20:50,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:20:50,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 04:20:50,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182244426] [2021-11-19 04:20:50,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:20:50,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 04:20:50,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:50,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 04:20:50,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:20:50,140 INFO L87 Difference]: Start difference. First operand 137 states and 148 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:20:51,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:20:51,698 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2021-11-19 04:20:51,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:20:51,698 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2021-11-19 04:20:51,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:20:51,700 INFO L225 Difference]: With dead ends: 149 [2021-11-19 04:20:51,700 INFO L226 Difference]: Without dead ends: 149 [2021-11-19 04:20:51,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:20:51,701 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 133 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:20:51,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 103 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 04:20:51,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-19 04:20:51,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 136. [2021-11-19 04:20:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 116 states have internal predecessors, (125), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:20:51,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2021-11-19 04:20:51,709 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 64 [2021-11-19 04:20:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:20:51,710 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2021-11-19 04:20:51,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:20:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2021-11-19 04:20:51,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 04:20:51,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:20:51,712 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:20:51,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 04:20:51,712 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting dll_appendErr12REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:20:51,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:20:51,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1982666410, now seen corresponding path program 1 times [2021-11-19 04:20:51,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:20:51,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364857942] [2021-11-19 04:20:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:51,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:51,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:20:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:51,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:20:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:51,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:20:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:51,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:20:51,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:51,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:20:51,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:51,964 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 04:20:51,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:20:51,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364857942] [2021-11-19 04:20:51,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364857942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:20:51,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:20:51,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 04:20:51,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625224552] [2021-11-19 04:20:51,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:20:51,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 04:20:51,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:51,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 04:20:51,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-19 04:20:51,966 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:20:53,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:20:53,192 INFO L93 Difference]: Finished difference Result 148 states and 160 transitions. [2021-11-19 04:20:53,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 04:20:53,193 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 64 [2021-11-19 04:20:53,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:20:53,194 INFO L225 Difference]: With dead ends: 148 [2021-11-19 04:20:53,194 INFO L226 Difference]: Without dead ends: 148 [2021-11-19 04:20:53,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:20:53,195 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 128 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:20:53,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 95 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-19 04:20:53,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-19 04:20:53,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 135. [2021-11-19 04:20:53,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 95 states have (on average 1.305263157894737) internal successors, (124), 115 states have internal predecessors, (124), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:20:53,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2021-11-19 04:20:53,203 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 64 [2021-11-19 04:20:53,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:20:53,203 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2021-11-19 04:20:53,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.428571428571429) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:20:53,204 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2021-11-19 04:20:53,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 04:20:53,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:20:53,205 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:20:53,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-19 04:20:53,206 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:20:53,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:20:53,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1726564691, now seen corresponding path program 1 times [2021-11-19 04:20:53,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:20:53,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816176294] [2021-11-19 04:20:53,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:53,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:53,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:20:53,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:53,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:20:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:53,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:20:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:53,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:20:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:53,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:20:53,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:53,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:20:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 04:20:53,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:20:53,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816176294] [2021-11-19 04:20:53,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816176294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:20:53,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:20:53,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 04:20:53,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972089206] [2021-11-19 04:20:53,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:20:53,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:20:53,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:53,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:20:53,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:20:53,700 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:20:55,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:20:55,717 INFO L93 Difference]: Finished difference Result 176 states and 195 transitions. [2021-11-19 04:20:55,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:20:55,718 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2021-11-19 04:20:55,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:20:55,719 INFO L225 Difference]: With dead ends: 176 [2021-11-19 04:20:55,719 INFO L226 Difference]: Without dead ends: 176 [2021-11-19 04:20:55,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:20:55,721 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 249 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:20:55,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 89 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 04:20:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-19 04:20:55,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 138. [2021-11-19 04:20:55,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 100 states have (on average 1.28) internal successors, (128), 117 states have internal predecessors, (128), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-19 04:20:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 152 transitions. [2021-11-19 04:20:55,727 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 152 transitions. Word has length 64 [2021-11-19 04:20:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:20:55,728 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 152 transitions. [2021-11-19 04:20:55,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:20:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 152 transitions. [2021-11-19 04:20:55,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-19 04:20:55,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:20:55,730 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:20:55,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-19 04:20:55,730 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr3REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:20:55,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:20:55,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1726564692, now seen corresponding path program 1 times [2021-11-19 04:20:55,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:20:55,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617019747] [2021-11-19 04:20:55,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:55,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:55,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:20:55,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:55,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:20:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:55,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:20:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:55,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:20:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:55,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:20:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:56,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:20:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 04:20:56,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:20:56,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617019747] [2021-11-19 04:20:56,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617019747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:20:56,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:20:56,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-19 04:20:56,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953334710] [2021-11-19 04:20:56,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:20:56,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:20:56,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:20:56,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:20:56,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:20:56,405 INFO L87 Difference]: Start difference. First operand 138 states and 152 transitions. Second operand has 13 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:20:58,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:20:58,935 INFO L93 Difference]: Finished difference Result 187 states and 211 transitions. [2021-11-19 04:20:58,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 04:20:58,936 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2021-11-19 04:20:58,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:20:58,938 INFO L225 Difference]: With dead ends: 187 [2021-11-19 04:20:58,938 INFO L226 Difference]: Without dead ends: 187 [2021-11-19 04:20:58,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:20:58,939 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 211 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:20:58,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 95 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-19 04:20:58,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-19 04:20:58,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2021-11-19 04:20:58,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 107 states have (on average 1.280373831775701) internal successors, (137), 124 states have internal predecessors, (137), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-19 04:20:58,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2021-11-19 04:20:58,949 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 64 [2021-11-19 04:20:58,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:20:58,950 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2021-11-19 04:20:58,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:20:58,950 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2021-11-19 04:20:58,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 04:20:58,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:20:58,951 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:20:58,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-19 04:20:58,952 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting dll_appendErr6REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:20:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:20:58,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1333169234, now seen corresponding path program 1 times [2021-11-19 04:20:58,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:20:58,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979986918] [2021-11-19 04:20:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:20:58,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:20:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:59,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:20:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:20:59,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:20:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:21:00,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:21:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:21:00,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:21:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:21:00,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:21:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:21:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:21:02,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:21:02,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979986918] [2021-11-19 04:21:02,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979986918] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:21:02,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218223596] [2021-11-19 04:21:02,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:21:02,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:21:02,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:21:02,615 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:21:02,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:21:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:21:02,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-19 04:21:02,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:21:02,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:21:03,267 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 04:21:03,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-19 04:21:03,594 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 13 treesize of output 9 [2021-11-19 04:21:03,800 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-19 04:21:03,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 31 [2021-11-19 04:21:05,442 INFO L354 Elim1Store]: treesize reduction 38, result has 28.3 percent of original size [2021-11-19 04:21:05,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 42 [2021-11-19 04:21:05,461 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 33 treesize of output 29 [2021-11-19 04:21:05,469 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 04:21:05,469 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 29 treesize of output 25 [2021-11-19 04:21:08,371 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int)) (let ((.cse0 (+ node_create_~temp~0.offset 4)) (.cse1 (+ node_create_~temp~0.offset 8))) (and (= (store |c_old(#valid)| node_create_~temp~0.base 1) |c_#valid|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base) .cse0 0) .cse1 0) node_create_~temp~0.offset (select (select |c_#memory_$Pointer$.offset| node_create_~temp~0.base) node_create_~temp~0.offset)))) (= (select |c_old(#valid)| node_create_~temp~0.base) 0) (< node_create_~temp~0.base |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) .cse0 0) .cse1 0) node_create_~temp~0.offset (select (select |c_#memory_$Pointer$.base| node_create_~temp~0.base) node_create_~temp~0.offset))))))) is different from true [2021-11-19 04:21:08,774 INFO L354 Elim1Store]: treesize reduction 545, result has 8.1 percent of original size [2021-11-19 04:21:08,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 144 treesize of output 112 [2021-11-19 04:21:08,883 INFO L354 Elim1Store]: treesize reduction 187, result has 12.2 percent of original size [2021-11-19 04:21:08,883 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 3 case distinctions, treesize of input 137 treesize of output 125 [2021-11-19 04:21:08,970 INFO L354 Elim1Store]: treesize reduction 116, result has 32.2 percent of original size [2021-11-19 04:21:08,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 159 [2021-11-19 04:21:09,676 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-19 04:21:09,677 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 164 treesize of output 132 [2021-11-19 04:21:11,084 INFO L354 Elim1Store]: treesize reduction 138, result has 7.4 percent of original size [2021-11-19 04:21:11,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 129 treesize of output 62 [2021-11-19 04:21:11,676 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-19 04:21:11,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:21:12,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218223596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:21:12,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:21:12,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31] total 54 [2021-11-19 04:21:12,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790509001] [2021-11-19 04:21:12,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:21:12,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-19 04:21:12,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:21:12,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-19 04:21:12,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3131, Unknown=1, NotChecked=112, Total=3422 [2021-11-19 04:21:12,906 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand has 55 states, 48 states have (on average 1.9375) internal successors, (93), 44 states have internal predecessors, (93), 8 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 04:21:30,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:21:30,001 INFO L93 Difference]: Finished difference Result 164 states and 183 transitions. [2021-11-19 04:21:30,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 04:21:30,002 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 48 states have (on average 1.9375) internal successors, (93), 44 states have internal predecessors, (93), 8 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 65 [2021-11-19 04:21:30,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:21:30,004 INFO L225 Difference]: With dead ends: 164 [2021-11-19 04:21:30,005 INFO L226 Difference]: Without dead ends: 164 [2021-11-19 04:21:30,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=338, Invalid=5982, Unknown=4, NotChecked=156, Total=6480 [2021-11-19 04:21:30,008 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 114 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 2010 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 2837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 785 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:21:30,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 480 Invalid, 2837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2010 Invalid, 0 Unknown, 785 Unchecked, 4.3s Time] [2021-11-19 04:21:30,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-19 04:21:30,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 149. [2021-11-19 04:21:30,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2882882882882882) internal successors, (143), 128 states have internal predecessors, (143), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-19 04:21:30,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 167 transitions. [2021-11-19 04:21:30,016 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 167 transitions. Word has length 65 [2021-11-19 04:21:30,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:21:30,017 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 167 transitions. [2021-11-19 04:21:30,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 48 states have (on average 1.9375) internal successors, (93), 44 states have internal predecessors, (93), 8 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-19 04:21:30,017 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 167 transitions. [2021-11-19 04:21:30,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 04:21:30,018 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:21:30,019 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:21:30,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:21:30,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-19 04:21:30,225 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting dll_appendErr7REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:21:30,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:21:30,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1333169235, now seen corresponding path program 1 times [2021-11-19 04:21:30,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:21:30,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987397077] [2021-11-19 04:21:30,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:21:30,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:21:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:21:30,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:21:30,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:21:31,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:21:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:21:32,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:21:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:21:32,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:21:32,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:21:32,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-19 04:21:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:21:35,103 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-19 04:21:35,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:21:35,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987397077] [2021-11-19 04:21:35,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987397077] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:21:35,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496980630] [2021-11-19 04:21:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:21:35,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:21:35,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:21:35,105 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:21:35,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 04:21:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:21:35,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 121 conjunts are in the unsatisfiable core [2021-11-19 04:21:35,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:21:35,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:21:36,667 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 04:21:36,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-19 04:21:37,123 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 13 treesize of output 9 [2021-11-19 04:21:37,134 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 13 treesize of output 9 [2021-11-19 04:21:37,400 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-19 04:21:37,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 54 [2021-11-19 04:21:37,427 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-19 04:21:37,427 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 78 treesize of output 71 [2021-11-19 04:21:39,379 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-19 04:21:39,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 56 [2021-11-19 04:21:39,426 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-19 04:21:39,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 43 [2021-11-19 04:21:39,436 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 04:21:39,436 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 34 treesize of output 30 [2021-11-19 04:21:39,443 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 24 treesize of output 22 [2021-11-19 04:22:10,198 INFO L354 Elim1Store]: treesize reduction 505, result has 8.3 percent of original size [2021-11-19 04:22:10,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 210 treesize of output 146 [2021-11-19 04:22:10,451 INFO L354 Elim1Store]: treesize reduction 477, result has 8.4 percent of original size [2021-11-19 04:22:10,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 203 treesize of output 187 [2021-11-19 04:22:10,505 INFO L354 Elim1Store]: treesize reduction 34, result has 44.3 percent of original size [2021-11-19 04:22:10,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 196 treesize of output 198 [2021-11-19 04:22:10,535 INFO L354 Elim1Store]: treesize reduction 59, result has 24.4 percent of original size [2021-11-19 04:22:10,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 189 treesize of output 184 [2021-11-19 04:22:13,010 INFO L354 Elim1Store]: treesize reduction 144, result has 0.7 percent of original size [2021-11-19 04:22:13,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 215 treesize of output 101 [2021-11-19 04:22:13,066 INFO L354 Elim1Store]: treesize reduction 112, result has 7.4 percent of original size [2021-11-19 04:22:13,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 57 [2021-11-19 04:22:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:22:13,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:22:21,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496980630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:22:21,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:22:21,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-11-19 04:22:21,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947667496] [2021-11-19 04:22:21,882 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:22:21,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-19 04:22:21,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:22:21,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-19 04:22:21,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=4344, Unknown=16, NotChecked=0, Total=4556 [2021-11-19 04:22:21,885 INFO L87 Difference]: Start difference. First operand 149 states and 167 transitions. Second operand has 62 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 50 states have internal predecessors, (103), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-19 04:23:01,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:01,195 INFO L93 Difference]: Finished difference Result 162 states and 180 transitions. [2021-11-19 04:23:01,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 04:23:01,196 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 50 states have internal predecessors, (103), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 65 [2021-11-19 04:23:01,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:01,197 INFO L225 Difference]: With dead ends: 162 [2021-11-19 04:23:01,197 INFO L226 Difference]: Without dead ends: 162 [2021-11-19 04:23:01,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 78.5s TimeCoverageRelationStatistics Valid=427, Invalid=7919, Unknown=26, NotChecked=0, Total=8372 [2021-11-19 04:23:01,200 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 185 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 2813 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 3352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 465 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:01,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 436 Invalid, 3352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2813 Invalid, 0 Unknown, 465 Unchecked, 6.6s Time] [2021-11-19 04:23:01,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-19 04:23:01,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 149. [2021-11-19 04:23:01,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 111 states have (on average 1.2792792792792793) internal successors, (142), 128 states have internal predecessors, (142), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-19 04:23:01,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 166 transitions. [2021-11-19 04:23:01,208 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 166 transitions. Word has length 65 [2021-11-19 04:23:01,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:01,208 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 166 transitions. [2021-11-19 04:23:01,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 50 states have internal predecessors, (103), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-19 04:23:01,209 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 166 transitions. [2021-11-19 04:23:01,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 04:23:01,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:01,210 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:01,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:23:01,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-19 04:23:01,413 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr14ASSERT_VIOLATIONMEMORY_LEAK === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:23:01,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:01,414 INFO L85 PathProgramCache]: Analyzing trace with hash -439504048, now seen corresponding path program 1 times [2021-11-19 04:23:01,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:23:01,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298660950] [2021-11-19 04:23:01,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:01,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:23:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:01,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:23:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:01,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:23:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:01,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:23:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:01,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:23:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:02,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:23:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:02,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:23:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:23:03,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:23:03,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298660950] [2021-11-19 04:23:03,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298660950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:23:03,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441779828] [2021-11-19 04:23:03,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:03,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:23:03,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:23:03,025 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:23:03,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 04:23:03,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:03,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-19 04:23:03,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:23:03,819 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 12 treesize of output 8 [2021-11-19 04:23:06,368 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) (+ node_create_~temp~0.offset 4) 0) (+ node_create_~temp~0.offset 8) 0) node_create_~temp~0.offset (select (select |c_#memory_$Pointer$.base| node_create_~temp~0.base) node_create_~temp~0.offset)))))) is different from true [2021-11-19 04:23:20,553 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_7 Int) (node_create_~temp~0.offset Int) (node_create_~temp~0.base Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= (select (select (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) (+ node_create_~temp~0.offset 4) 0) (+ node_create_~temp~0.offset 8) 0) node_create_~temp~0.offset v_DerPreprocessor_7)) |c_dll_append_#in~head.base|) |c_dll_append_#in~head.offset|) |c_dll_append_#t~mem8.base|))) is different from true [2021-11-19 04:23:22,594 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_7 Int) (node_create_~temp~0.offset Int) (node_create_~temp~0.base Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= (select (select (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) (+ node_create_~temp~0.offset 4) 0) (+ node_create_~temp~0.offset 8) 0) node_create_~temp~0.offset v_DerPreprocessor_7)) |c_dll_append_#in~head.base|) |c_dll_append_#in~head.offset|) 0))) is different from true [2021-11-19 04:23:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2021-11-19 04:23:22,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:23:24,990 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_8 Int) (v_node_create_~temp~0.base_84 Int) (v_node_create_~temp~0.offset_74 Int)) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_node_create_~temp~0.base_84 (store (store (store (select |c_#memory_$Pointer$.base| v_node_create_~temp~0.base_84) (+ v_node_create_~temp~0.offset_74 4) 0) (+ v_node_create_~temp~0.offset_74 8) 0) v_node_create_~temp~0.offset_74 v_DerPreprocessor_8)) |c_main_~#s~0.base|) |c_main_~#s~0.offset|) 0)) (<= |c_#StackHeapBarrier| v_node_create_~temp~0.base_84))) is different from false [2021-11-19 04:23:24,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441779828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:23:24,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:23:24,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 32 [2021-11-19 04:23:24,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958202560] [2021-11-19 04:23:24,994 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:23:24,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-19 04:23:24,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:23:24,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-19 04:23:24,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=726, Unknown=9, NotChecked=228, Total=1056 [2021-11-19 04:23:24,995 INFO L87 Difference]: Start difference. First operand 149 states and 166 transitions. Second operand has 32 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 7 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-19 04:23:58,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:23:58,019 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2021-11-19 04:23:58,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 04:23:58,021 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 7 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 67 [2021-11-19 04:23:58,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:23:58,023 INFO L225 Difference]: With dead ends: 152 [2021-11-19 04:23:58,023 INFO L226 Difference]: Without dead ends: 149 [2021-11-19 04:23:58,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 52.3s TimeCoverageRelationStatistics Valid=210, Invalid=1953, Unknown=15, NotChecked=372, Total=2550 [2021-11-19 04:23:58,025 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 189 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-19 04:23:58,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 191 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1115 Invalid, 0 Unknown, 300 Unchecked, 2.8s Time] [2021-11-19 04:23:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-19 04:23:58,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 136. [2021-11-19 04:23:58,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 99 states have (on average 1.2727272727272727) internal successors, (126), 116 states have internal predecessors, (126), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-19 04:23:58,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2021-11-19 04:23:58,032 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 67 [2021-11-19 04:23:58,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:23:58,033 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2021-11-19 04:23:58,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 2.730769230769231) internal successors, (71), 26 states have internal predecessors, (71), 7 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-19 04:23:58,033 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2021-11-19 04:23:58,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 04:23:58,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:23:58,035 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:23:58,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:23:58,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-19 04:23:58,249 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:23:58,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:23:58,250 INFO L85 PathProgramCache]: Analyzing trace with hash 232427872, now seen corresponding path program 1 times [2021-11-19 04:23:58,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:23:58,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759862250] [2021-11-19 04:23:58,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:23:58,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:23:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:58,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:23:58,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:58,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:23:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:58,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:23:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:58,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:23:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:23:59,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:23:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:00,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:24:00,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:24:01,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:01,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759862250] [2021-11-19 04:24:01,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759862250] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:24:01,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:24:01,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-19 04:24:01,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150526995] [2021-11-19 04:24:01,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:24:01,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-19 04:24:01,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:24:01,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-19 04:24:01,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-11-19 04:24:01,098 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand has 27 states, 23 states have (on average 2.391304347826087) internal successors, (55), 21 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 04:24:09,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:24:09,206 INFO L93 Difference]: Finished difference Result 181 states and 200 transitions. [2021-11-19 04:24:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 04:24:09,207 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 2.391304347826087) internal successors, (55), 21 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 69 [2021-11-19 04:24:09,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:24:09,209 INFO L225 Difference]: With dead ends: 181 [2021-11-19 04:24:09,209 INFO L226 Difference]: Without dead ends: 181 [2021-11-19 04:24:09,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=211, Invalid=2339, Unknown=0, NotChecked=0, Total=2550 [2021-11-19 04:24:09,211 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 314 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:24:09,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 99 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-11-19 04:24:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-19 04:24:09,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 143. [2021-11-19 04:24:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 105 states have (on average 1.2666666666666666) internal successors, (133), 122 states have internal predecessors, (133), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (13), 11 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-19 04:24:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 157 transitions. [2021-11-19 04:24:09,218 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 157 transitions. Word has length 69 [2021-11-19 04:24:09,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:24:09,218 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 157 transitions. [2021-11-19 04:24:09,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 2.391304347826087) internal successors, (55), 21 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-19 04:24:09,219 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 157 transitions. [2021-11-19 04:24:09,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 04:24:09,220 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:24:09,220 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:24:09,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-19 04:24:09,221 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr3REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-19 04:24:09,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:24:09,221 INFO L85 PathProgramCache]: Analyzing trace with hash 232427873, now seen corresponding path program 1 times [2021-11-19 04:24:09,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:24:09,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211698104] [2021-11-19 04:24:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:09,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:24:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:09,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:24:09,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:09,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-19 04:24:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:10,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:24:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:10,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-19 04:24:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:10,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-19 04:24:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:12,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-19 04:24:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:24:13,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:24:13,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211698104] [2021-11-19 04:24:13,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211698104] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:24:13,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31050064] [2021-11-19 04:24:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:24:13,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:24:13,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:24:13,421 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:24:13,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93033c10-5683-408a-9394-cc4f387fd1c4/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 04:24:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:24:13,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-19 04:24:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:24:13,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-19 04:24:16,035 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 34 treesize of output 26 [2021-11-19 04:24:16,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-11-19 04:24:16,053 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 9 treesize of output 7 [2021-11-19 04:25:21,975 INFO L354 Elim1Store]: treesize reduction 1584, result has 12.5 percent of original size [2021-11-19 04:25:21,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 2036 treesize of output 1431 [2021-11-19 04:25:23,889 INFO L354 Elim1Store]: treesize reduction 2371, result has 19.0 percent of original size [2021-11-19 04:25:23,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 15 case distinctions, treesize of input 2601 treesize of output 1656 [2021-11-19 04:25:24,040 INFO L354 Elim1Store]: treesize reduction 63, result has 21.3 percent of original size [2021-11-19 04:25:24,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1665 treesize of output 1667 [2021-11-19 04:25:24,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:24,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:24,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:24,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:24,857 INFO L354 Elim1Store]: treesize reduction 14, result has 60.0 percent of original size [2021-11-19 04:25:24,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 280 treesize of output 226 [2021-11-19 04:25:25,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:25,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:25,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:25,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:25,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 203 [2021-11-19 04:25:25,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:25,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:25,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:25,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:26,024 INFO L354 Elim1Store]: treesize reduction 16, result has 54.3 percent of original size [2021-11-19 04:25:26,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 276 treesize of output 228 [2021-11-19 04:25:26,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:26,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:26,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:26,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:26,682 INFO L354 Elim1Store]: treesize reduction 70, result has 64.1 percent of original size [2021-11-19 04:25:26,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 291 treesize of output 337 [2021-11-19 04:25:27,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:27,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:27,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:27,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:28,027 INFO L354 Elim1Store]: treesize reduction 62, result has 51.2 percent of original size [2021-11-19 04:25:28,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 276 treesize of output 274 [2021-11-19 04:25:29,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:29,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:29,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:29,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:30,069 INFO L354 Elim1Store]: treesize reduction 9, result has 92.9 percent of original size [2021-11-19 04:25:30,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 276 treesize of output 327 [2021-11-19 04:25:30,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:30,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:30,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:30,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:30,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 203 [2021-11-19 04:25:31,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:31,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:31,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:31,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:31,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 261 treesize of output 207 [2021-11-19 04:25:31,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 04:25:32,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:32,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:32,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:32,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:32,117 INFO L354 Elim1Store]: treesize reduction 25, result has 28.6 percent of original size [2021-11-19 04:25:32,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 276 treesize of output 220 [2021-11-19 04:25:32,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:32,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:32,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:32,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:32,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 261 treesize of output 207 [2021-11-19 04:25:32,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:32,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:32,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:32,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:33,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 04:25:33,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 205 treesize of output 283 [2021-11-19 04:25:53,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:53,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:53,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:53,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:25:53,732 INFO L354 Elim1Store]: treesize reduction 64, result has 52.6 percent of original size [2021-11-19 04:25:53,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 290 treesize of output 235 [2021-11-19 04:26:05,295 INFO L354 Elim1Store]: treesize reduction 158, result has 19.8 percent of original size [2021-11-19 04:26:05,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 496 treesize of output 319