./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 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8e4e2611155a39995b0fc64ec45d64e4c98f789d2737326ee819380629347be0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:05:35,392 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:05:35,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:05:35,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:05:35,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:05:35,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:05:35,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:05:35,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:05:35,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:05:35,445 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:05:35,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:05:35,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:05:35,449 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:05:35,450 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:05:35,452 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:05:35,454 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:05:35,456 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:05:35,457 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:05:35,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:05:35,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:05:35,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:05:35,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:05:35,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:05:35,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:05:35,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:05:35,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:05:35,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:05:35,479 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:05:35,480 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:05:35,483 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:05:35,484 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:05:35,485 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:05:35,487 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:05:35,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:05:35,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:05:35,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:05:35,492 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:05:35,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:05:35,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:05:35,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:05:35,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:05:35,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 23:05:35,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:05:35,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:05:35,546 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:05:35,546 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:05:35,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:05:35,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:05:35,548 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:05:35,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:05:35,549 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:05:35,549 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 23:05:35,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:05:35,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:05:35,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:05:35,550 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 23:05:35,550 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 23:05:35,550 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 23:05:35,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:05:35,550 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 23:05:35,551 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:05:35,551 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:05:35,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:05:35,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:05:35,554 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:05:35,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:05:35,555 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:05:35,555 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:05:35,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:05:35,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:05:35,556 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:05:35,558 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_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8e4e2611155a39995b0fc64ec45d64e4c98f789d2737326ee819380629347be0 [2021-11-02 23:05:35,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:05:35,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:05:35,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:05:35,860 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:05:35,862 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:05:35,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2021-11-02 23:05:35,965 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/data/b32abe009/36c1878f3b154be3ac38ad99a2a5dd68/FLAG0f13df38a [2021-11-02 23:05:36,549 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:05:36,549 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2021-11-02 23:05:36,566 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/data/b32abe009/36c1878f3b154be3ac38ad99a2a5dd68/FLAG0f13df38a [2021-11-02 23:05:36,803 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/data/b32abe009/36c1878f3b154be3ac38ad99a2a5dd68 [2021-11-02 23:05:36,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:05:36,809 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 23:05:36,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:05:36,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:05:36,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:05:36,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:05:36" (1/1) ... [2021-11-02 23:05:36,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70115ab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:36, skipping insertion in model container [2021-11-02 23:05:36,827 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:05:36" (1/1) ... [2021-11-02 23:05:36,843 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:05:36,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:05:37,352 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/sv-benchmarks/c/list-simple/dll2n_append_unequal.i[24457,24470] [2021-11-02 23:05:37,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:05:37,374 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:05:37,422 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/sv-benchmarks/c/list-simple/dll2n_append_unequal.i[24457,24470] [2021-11-02 23:05:37,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:05:37,457 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:05:37,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:37 WrapperNode [2021-11-02 23:05:37,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:05:37,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:05:37,459 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:05:37,459 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:05:37,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:37" (1/1) ... [2021-11-02 23:05:37,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:37" (1/1) ... [2021-11-02 23:05:37,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:37" (1/1) ... [2021-11-02 23:05:37,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:37" (1/1) ... [2021-11-02 23:05:37,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:37" (1/1) ... [2021-11-02 23:05:37,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:37" (1/1) ... [2021-11-02 23:05:37,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:37" (1/1) ... [2021-11-02 23:05:37,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:05:37,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:05:37,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:05:37,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:05:37,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:37" (1/1) ... [2021-11-02 23:05:37,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:05:37,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:37,629 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:05:37,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:05:37,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 23:05:37,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:05:37,681 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 23:05:37,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 23:05:37,681 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 23:05:37,682 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-02 23:05:37,682 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-02 23:05:37,683 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2021-11-02 23:05:37,683 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2021-11-02 23:05:37,684 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_append [2021-11-02 23:05:37,684 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 23:05:37,684 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 23:05:37,684 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 23:05:37,684 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 23:05:37,685 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 23:05:37,685 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 23:05:37,685 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:05:37,685 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 23:05:37,685 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 23:05:37,685 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 23:05:37,685 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 23:05:37,686 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 23:05:37,686 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 23:05:37,686 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 23:05:37,686 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 23:05:37,686 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 23:05:37,686 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 23:05:37,687 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 23:05:37,687 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 23:05:37,687 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 23:05:37,687 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 23:05:37,688 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 23:05:37,688 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 23:05:37,688 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 23:05:37,688 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 23:05:37,688 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 23:05:37,688 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 23:05:37,688 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 23:05:37,689 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 23:05:37,689 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 23:05:37,689 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 23:05:37,690 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 23:05:37,690 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 23:05:37,690 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 23:05:37,690 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 23:05:37,690 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 23:05:37,691 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 23:05:37,691 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 23:05:37,691 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 23:05:37,692 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 23:05:37,692 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 23:05:37,692 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 23:05:37,693 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 23:05:37,693 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 23:05:37,693 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 23:05:37,693 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 23:05:37,693 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 23:05:37,694 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 23:05:37,694 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 23:05:37,694 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 23:05:37,694 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 23:05:37,694 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 23:05:37,695 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 23:05:37,695 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 23:05:37,696 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 23:05:37,696 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 23:05:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 23:05:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 23:05:37,698 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 23:05:37,698 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 23:05:37,699 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 23:05:37,699 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 23:05:37,699 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 23:05:37,699 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-02 23:05:37,699 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 23:05:37,699 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 23:05:37,700 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 23:05:37,700 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 23:05:37,700 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 23:05:37,700 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 23:05:37,700 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 23:05:37,701 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 23:05:37,701 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 23:05:37,701 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 23:05:37,702 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 23:05:37,702 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 23:05:37,702 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 23:05:37,702 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 23:05:37,702 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 23:05:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 23:05:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 23:05:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 23:05:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 23:05:37,703 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 23:05:37,704 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 23:05:37,704 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 23:05:37,704 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 23:05:37,704 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 23:05:37,704 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 23:05:37,704 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 23:05:37,705 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 23:05:37,705 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 23:05:37,705 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 23:05:37,705 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 23:05:37,705 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 23:05:37,706 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 23:05:37,706 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 23:05:37,706 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 23:05:37,706 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 23:05:37,707 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 23:05:37,707 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 23:05:37,707 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 23:05:37,708 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 23:05:37,708 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 23:05:37,708 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 23:05:37,708 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 23:05:37,708 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 23:05:37,709 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 23:05:37,709 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 23:05:37,709 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 23:05:37,709 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 23:05:37,709 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-02 23:05:37,709 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-02 23:05:37,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 23:05:37,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 23:05:37,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 23:05:37,711 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2021-11-02 23:05:37,712 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2021-11-02 23:05:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 23:05:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 23:05:37,715 INFO L130 BoogieDeclarations]: Found specification of procedure dll_append [2021-11-02 23:05:37,716 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 23:05:37,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 23:05:37,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 23:05:37,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 23:05:37,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:05:37,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:05:38,155 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-02 23:05:38,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:05:38,554 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-02 23:05:38,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:05:38 BoogieIcfgContainer [2021-11-02 23:05:38,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:05:38,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:05:38,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:05:38,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:05:38,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:05:36" (1/3) ... [2021-11-02 23:05:38,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7213ad37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:05:38, skipping insertion in model container [2021-11-02 23:05:38,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:05:37" (2/3) ... [2021-11-02 23:05:38,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7213ad37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:05:38, skipping insertion in model container [2021-11-02 23:05:38,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:05:38" (3/3) ... [2021-11-02 23:05:38,568 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_append_unequal.i [2021-11-02 23:05:38,577 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:05:38,578 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 47 error locations. [2021-11-02 23:05:38,646 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:05:38,656 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 23:05:38,656 INFO L340 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2021-11-02 23:05:38,680 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) [2021-11-02 23:05:38,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 23:05:38,692 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:38,692 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:38,693 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)] === [2021-11-02 23:05:38,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:38,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2080500654, now seen corresponding path program 1 times [2021-11-02 23:05:38,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:38,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123081825] [2021-11-02 23:05:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:38,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:05:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:39,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:39,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123081825] [2021-11-02 23:05:39,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123081825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:39,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:39,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:05:39,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743824838] [2021-11-02 23:05:39,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:05:39,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:39,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:05:39,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:05:39,100 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) [2021-11-02 23:05:39,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:39,489 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2021-11-02 23:05:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:05:39,490 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 [2021-11-02 23:05:39,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:39,507 INFO L225 Difference]: With dead ends: 140 [2021-11-02 23:05:39,507 INFO L226 Difference]: Without dead ends: 134 [2021-11-02 23:05:39,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:05:39,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-02 23:05:39,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2021-11-02 23:05:39,565 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) [2021-11-02 23:05:39,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2021-11-02 23:05:39,569 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 13 [2021-11-02 23:05:39,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:39,569 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2021-11-02 23:05:39,570 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) [2021-11-02 23:05:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2021-11-02 23:05:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 23:05:39,571 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:39,571 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:39,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:05:39,571 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)] === [2021-11-02 23:05:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:39,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2080500655, now seen corresponding path program 1 times [2021-11-02 23:05:39,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:39,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47246410] [2021-11-02 23:05:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:39,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:05:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:39,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:39,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:39,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47246410] [2021-11-02 23:05:39,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47246410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:39,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:39,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:05:39,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605041581] [2021-11-02 23:05:39,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:05:39,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:39,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:05:39,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:05:39,659 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) [2021-11-02 23:05:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:39,951 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2021-11-02 23:05:39,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:05:39,952 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 [2021-11-02 23:05:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:39,959 INFO L225 Difference]: With dead ends: 131 [2021-11-02 23:05:39,959 INFO L226 Difference]: Without dead ends: 131 [2021-11-02 23:05:39,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:05:39,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-02 23:05:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2021-11-02 23:05:39,986 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) [2021-11-02 23:05:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2021-11-02 23:05:39,990 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 13 [2021-11-02 23:05:39,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:39,990 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2021-11-02 23:05:39,990 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) [2021-11-02 23:05:39,991 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2021-11-02 23:05:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:05:39,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:39,992 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:39,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:05:39,992 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)] === [2021-11-02 23:05:39,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:39,993 INFO L85 PathProgramCache]: Analyzing trace with hash 805126828, now seen corresponding path program 1 times [2021-11-02 23:05:39,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:39,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993142594] [2021-11-02 23:05:39,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:39,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:40,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:40,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:05:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:40,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-02 23:05:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:40,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:40,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993142594] [2021-11-02 23:05:40,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993142594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:40,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:40,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:05:40,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954690394] [2021-11-02 23:05:40,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:05:40,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:40,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:05:40,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:05:40,220 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) [2021-11-02 23:05:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:40,694 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2021-11-02 23:05:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:05:40,694 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 [2021-11-02 23:05:40,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:40,696 INFO L225 Difference]: With dead ends: 129 [2021-11-02 23:05:40,696 INFO L226 Difference]: Without dead ends: 129 [2021-11-02 23:05:40,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:05:40,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-02 23:05:40,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 111. [2021-11-02 23:05:40,703 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) [2021-11-02 23:05:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2021-11-02 23:05:40,705 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 20 [2021-11-02 23:05:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:40,705 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2021-11-02 23:05:40,706 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) [2021-11-02 23:05:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2021-11-02 23:05:40,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:05:40,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:40,707 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:40,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:05:40,707 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)] === [2021-11-02 23:05:40,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:40,708 INFO L85 PathProgramCache]: Analyzing trace with hash 805126829, now seen corresponding path program 1 times [2021-11-02 23:05:40,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:40,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583356643] [2021-11-02 23:05:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:40,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:40,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:05:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:40,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-02 23:05:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:40,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:40,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:40,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583356643] [2021-11-02 23:05:40,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583356643] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:40,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:40,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:05:40,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656639856] [2021-11-02 23:05:40,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:05:40,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:40,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:05:40,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:05:40,860 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) [2021-11-02 23:05:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:41,290 INFO L93 Difference]: Finished difference Result 127 states and 139 transitions. [2021-11-02 23:05:41,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:05:41,290 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 [2021-11-02 23:05:41,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:41,291 INFO L225 Difference]: With dead ends: 127 [2021-11-02 23:05:41,291 INFO L226 Difference]: Without dead ends: 127 [2021-11-02 23:05:41,292 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:05:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-02 23:05:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2021-11-02 23:05:41,296 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) [2021-11-02 23:05:41,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2021-11-02 23:05:41,297 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 20 [2021-11-02 23:05:41,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:41,297 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2021-11-02 23:05:41,298 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) [2021-11-02 23:05:41,298 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2021-11-02 23:05:41,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:05:41,299 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:41,299 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:41,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:05:41,299 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)] === [2021-11-02 23:05:41,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:41,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1858859150, now seen corresponding path program 1 times [2021-11-02 23:05:41,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:41,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487741035] [2021-11-02 23:05:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:41,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:41,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:41,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:05:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:41,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-02 23:05:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:41,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:41,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487741035] [2021-11-02 23:05:41,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487741035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:41,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:41,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 23:05:41,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618504406] [2021-11-02 23:05:41,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:05:41,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:41,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:05:41,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:05:41,385 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) [2021-11-02 23:05:41,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:41,682 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2021-11-02 23:05:41,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:05:41,683 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 [2021-11-02 23:05:41,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:41,684 INFO L225 Difference]: With dead ends: 132 [2021-11-02 23:05:41,685 INFO L226 Difference]: Without dead ends: 132 [2021-11-02 23:05:41,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:05:41,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-02 23:05:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 115. [2021-11-02 23:05:41,692 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) [2021-11-02 23:05:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-11-02 23:05:41,694 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 23 [2021-11-02 23:05:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:41,695 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-11-02 23:05:41,695 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) [2021-11-02 23:05:41,695 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-11-02 23:05:41,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:05:41,696 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:41,697 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:41,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:05:41,697 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)] === [2021-11-02 23:05:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:41,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1775503700, now seen corresponding path program 1 times [2021-11-02 23:05:41,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:41,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249159230] [2021-11-02 23:05:41,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:41,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:41,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:05:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:41,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:05:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:41,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-02 23:05:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:41,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:41,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249159230] [2021-11-02 23:05:41,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249159230] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:05:41,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:05:41,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:05:41,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934515061] [2021-11-02 23:05:41,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:05:41,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:41,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:05:41,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:05:41,809 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) [2021-11-02 23:05:42,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:42,155 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2021-11-02 23:05:42,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:05:42,156 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 [2021-11-02 23:05:42,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:42,158 INFO L225 Difference]: With dead ends: 132 [2021-11-02 23:05:42,158 INFO L226 Difference]: Without dead ends: 129 [2021-11-02 23:05:42,159 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:05:42,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-02 23:05:42,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 115. [2021-11-02 23:05:42,176 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) [2021-11-02 23:05:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2021-11-02 23:05:42,177 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 26 [2021-11-02 23:05:42,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:42,178 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2021-11-02 23:05:42,178 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) [2021-11-02 23:05:42,179 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2021-11-02 23:05:42,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 23:05:42,183 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:42,184 INFO L513 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] [2021-11-02 23:05:42,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 23:05:42,184 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)] === [2021-11-02 23:05:42,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:42,185 INFO L85 PathProgramCache]: Analyzing trace with hash -71067773, now seen corresponding path program 1 times [2021-11-02 23:05:42,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:42,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580928133] [2021-11-02 23:05:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:42,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:05:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-02 23:05:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-02 23:05:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:05:42,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:42,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580928133] [2021-11-02 23:05:42,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580928133] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:42,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43555631] [2021-11-02 23:05:42,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:42,489 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:42,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:42,491 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:42,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:05:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:42,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:05:42,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:43,015 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 23:05:43,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-02 23:05:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:43,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43555631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:43,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:43,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2021-11-02 23:05:43,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816808258] [2021-11-02 23:05:43,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:05:43,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:43,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:05:43,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:05:43,102 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-02 23:05:43,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:43,835 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2021-11-02 23:05:43,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:05:43,836 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2021-11-02 23:05:43,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:43,837 INFO L225 Difference]: With dead ends: 133 [2021-11-02 23:05:43,837 INFO L226 Difference]: Without dead ends: 133 [2021-11-02 23:05:43,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:05:43,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-02 23:05:43,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 114. [2021-11-02 23:05:43,841 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) [2021-11-02 23:05:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2021-11-02 23:05:43,842 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 38 [2021-11-02 23:05:43,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:43,842 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2021-11-02 23:05:43,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 11 states have internal predecessors, (48), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-02 23:05:43,843 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2021-11-02 23:05:43,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 23:05:43,844 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:43,844 INFO L513 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] [2021-11-02 23:05:43,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:44,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 23:05:44,045 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)] === [2021-11-02 23:05:44,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:44,046 INFO L85 PathProgramCache]: Analyzing trace with hash -71067772, now seen corresponding path program 1 times [2021-11-02 23:05:44,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:44,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683373287] [2021-11-02 23:05:44,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:44,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:44,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:05:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:44,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-02 23:05:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:44,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-02 23:05:44,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:44,330 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:05:44,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:44,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683373287] [2021-11-02 23:05:44,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683373287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:44,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288005979] [2021-11-02 23:05:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:44,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:44,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:44,333 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:44,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:05:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:44,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:05:44,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:44,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:05:44,854 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-02 23:05:44,855 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 [2021-11-02 23:05:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:44,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288005979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:44,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:44,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-02 23:05:44,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034681945] [2021-11-02 23:05:44,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:05:44,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:44,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:05:44,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:05:44,935 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) [2021-11-02 23:05:45,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:45,580 INFO L93 Difference]: Finished difference Result 132 states and 145 transitions. [2021-11-02 23:05:45,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:05:45,581 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 [2021-11-02 23:05:45,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:45,583 INFO L225 Difference]: With dead ends: 132 [2021-11-02 23:05:45,583 INFO L226 Difference]: Without dead ends: 132 [2021-11-02 23:05:45,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:05:45,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-02 23:05:45,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 113. [2021-11-02 23:05:45,587 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) [2021-11-02 23:05:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2021-11-02 23:05:45,588 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 38 [2021-11-02 23:05:45,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:45,589 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2021-11-02 23:05:45,589 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) [2021-11-02 23:05:45,589 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2021-11-02 23:05:45,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:05:45,591 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:45,591 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:05:45,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:45,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:45,792 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)] === [2021-11-02 23:05:45,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:45,792 INFO L85 PathProgramCache]: Analyzing trace with hash -21021789, now seen corresponding path program 1 times [2021-11-02 23:05:45,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:45,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347644224] [2021-11-02 23:05:45,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:45,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:45,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:05:45,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:45,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:05:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:45,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 23:05:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:45,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-02 23:05:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-02 23:05:45,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:45,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347644224] [2021-11-02 23:05:45,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347644224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:45,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802115051] [2021-11-02 23:05:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:45,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:45,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:45,925 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:45,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:05:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:46,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 23:05:46,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:05:46,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802115051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:46,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:46,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-11-02 23:05:46,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567152059] [2021-11-02 23:05:46,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:05:46,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:46,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:05:46,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:05:46,257 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 10 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-02 23:05:46,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:46,571 INFO L93 Difference]: Finished difference Result 138 states and 151 transitions. [2021-11-02 23:05:46,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 23:05:46,572 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) Word has length 41 [2021-11-02 23:05:46,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:46,573 INFO L225 Difference]: With dead ends: 138 [2021-11-02 23:05:46,573 INFO L226 Difference]: Without dead ends: 135 [2021-11-02 23:05:46,574 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:05:46,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-02 23:05:46,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 115. [2021-11-02 23:05:46,578 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) [2021-11-02 23:05:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2021-11-02 23:05:46,579 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 41 [2021-11-02 23:05:46,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:46,579 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2021-11-02 23:05:46,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-02 23:05:46,580 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2021-11-02 23:05:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 23:05:46,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:46,581 INFO L513 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] [2021-11-02 23:05:46,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:46,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:46,781 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)] === [2021-11-02 23:05:46,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:46,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1345502860, now seen corresponding path program 2 times [2021-11-02 23:05:46,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:46,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977936971] [2021-11-02 23:05:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:46,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:46,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:05:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:46,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:05:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:46,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 23:05:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:46,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-02 23:05:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:47,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-02 23:05:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:05:47,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:47,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977936971] [2021-11-02 23:05:47,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977936971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:47,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274666519] [2021-11-02 23:05:47,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:05:47,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:47,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:47,036 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:47,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:05:47,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:05:47,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:05:47,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-02 23:05:47,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:05:47,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274666519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:47,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:47,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 9 [2021-11-02 23:05:47,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608131181] [2021-11-02 23:05:47,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:05:47,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:47,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:05:47,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:05:47,493 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, (12), 4 states have call predecessors, (12), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-02 23:05:47,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:47,835 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2021-11-02 23:05:47,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:05:47,836 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, (12), 4 states have call predecessors, (12), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 56 [2021-11-02 23:05:47,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:47,837 INFO L225 Difference]: With dead ends: 128 [2021-11-02 23:05:47,837 INFO L226 Difference]: Without dead ends: 128 [2021-11-02 23:05:47,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:05:47,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-02 23:05:47,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 115. [2021-11-02 23:05:47,841 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) [2021-11-02 23:05:47,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 124 transitions. [2021-11-02 23:05:47,842 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 124 transitions. Word has length 56 [2021-11-02 23:05:47,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:47,842 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 124 transitions. [2021-11-02 23:05:47,842 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, (12), 4 states have call predecessors, (12), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-02 23:05:47,843 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 124 transitions. [2021-11-02 23:05:47,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 23:05:47,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:47,844 INFO L513 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] [2021-11-02 23:05:47,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:48,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 23:05:48,048 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)] === [2021-11-02 23:05:48,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:48,048 INFO L85 PathProgramCache]: Analyzing trace with hash 451161686, now seen corresponding path program 1 times [2021-11-02 23:05:48,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:48,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673699937] [2021-11-02 23:05:48,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:48,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:48,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:05:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:48,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:05:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:48,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 23:05:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:48,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-02 23:05:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:48,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-02 23:05:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:05:48,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:48,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673699937] [2021-11-02 23:05:48,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673699937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:48,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473726659] [2021-11-02 23:05:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:48,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:48,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:48,636 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:48,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:05:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:48,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:05:48,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:48,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:05:48,967 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 [2021-11-02 23:05:49,670 INFO L354 Elim1Store]: treesize reduction 50, result has 9.1 percent of original size [2021-11-02 23:05:49,670 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 [2021-11-02 23:05:50,015 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-02 23:05:50,015 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 [2021-11-02 23:05:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:05:50,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473726659] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:50,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:50,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-11-02 23:05:50,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461535047] [2021-11-02 23:05:50,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:05:50,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:50,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:05:50,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:05:50,103 INFO L87 Difference]: Start difference. First operand 115 states and 124 transitions. Second operand has 27 states, 25 states have (on average 3.2) internal successors, (80), 22 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) [2021-11-02 23:05:52,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:52,635 INFO L93 Difference]: Finished difference Result 199 states and 221 transitions. [2021-11-02 23:05:52,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:05:52,635 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 3.2) internal successors, (80), 22 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 [2021-11-02 23:05:52,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:52,638 INFO L225 Difference]: With dead ends: 199 [2021-11-02 23:05:52,639 INFO L226 Difference]: Without dead ends: 199 [2021-11-02 23:05:52,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=283, Invalid=1609, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:05:52,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-02 23:05:52,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 142. [2021-11-02 23:05:52,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 92 states have (on average 1.5869565217391304) internal successors, (146), 123 states have internal predecessors, (146), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 23:05:52,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2021-11-02 23:05:52,653 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 57 [2021-11-02 23:05:52,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:52,653 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2021-11-02 23:05:52,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 3.2) internal successors, (80), 22 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) [2021-11-02 23:05:52,654 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2021-11-02 23:05:52,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 23:05:52,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:52,659 INFO L513 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] [2021-11-02 23:05:52,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:52,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-02 23:05:52,874 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)] === [2021-11-02 23:05:52,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:52,874 INFO L85 PathProgramCache]: Analyzing trace with hash 451161687, now seen corresponding path program 1 times [2021-11-02 23:05:52,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:52,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818683130] [2021-11-02 23:05:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:52,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:53,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:05:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:53,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:05:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:53,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 23:05:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:53,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-02 23:05:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:53,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-02 23:05:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:05:53,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:53,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818683130] [2021-11-02 23:05:53,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818683130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:53,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833980798] [2021-11-02 23:05:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:53,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:53,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:53,398 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:53,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:05:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:53,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 23:05:53,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:53,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:05:53,743 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 [2021-11-02 23:05:54,417 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-02 23:05:54,417 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 [2021-11-02 23:05:54,710 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-02 23:05:54,710 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 [2021-11-02 23:05:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 23:05:54,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833980798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:54,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:05:54,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2021-11-02 23:05:54,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013011301] [2021-11-02 23:05:54,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:05:54,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:05:54,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:05:54,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:05:54,808 INFO L87 Difference]: Start difference. First operand 142 states and 168 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) [2021-11-02 23:05:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:05:56,157 INFO L93 Difference]: Finished difference Result 221 states and 243 transitions. [2021-11-02 23:05:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:05:56,158 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 [2021-11-02 23:05:56,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:05:56,160 INFO L225 Difference]: With dead ends: 221 [2021-11-02 23:05:56,160 INFO L226 Difference]: Without dead ends: 221 [2021-11-02 23:05:56,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:05:56,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-02 23:05:56,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 155. [2021-11-02 23:05:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 105 states have (on average 1.619047619047619) internal successors, (170), 136 states have internal predecessors, (170), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 23:05:56,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 192 transitions. [2021-11-02 23:05:56,169 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 192 transitions. Word has length 57 [2021-11-02 23:05:56,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:05:56,170 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 192 transitions. [2021-11-02 23:05:56,170 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) [2021-11-02 23:05:56,170 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 192 transitions. [2021-11-02 23:05:56,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 23:05:56,171 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:05:56,171 INFO L513 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] [2021-11-02 23:05:56,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 23:05:56,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:56,388 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting dll_appendErr6REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-02 23:05:56,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:05:56,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1780288292, now seen corresponding path program 1 times [2021-11-02 23:05:56,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:05:56,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714521130] [2021-11-02 23:05:56,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:56,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:05:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:56,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:05:56,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:56,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:05:56,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:56,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 23:05:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:56,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-02 23:05:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:56,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-02 23:05:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 23:05:56,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:05:56,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714521130] [2021-11-02 23:05:56,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714521130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:05:56,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964718011] [2021-11-02 23:05:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:05:56,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:05:56,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:05:56,996 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:05:57,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:05:57,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:05:57,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:05:57,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:05:57,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:06:04,252 INFO L354 Elim1Store]: treesize reduction 187, result has 12.2 percent of original size [2021-11-02 23:06:04,253 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 [2021-11-02 23:06:04,276 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-02 23:06:04,277 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 [2021-11-02 23:06:04,563 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-02 23:06:04,563 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 [2021-11-02 23:06:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 23:06:04,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964718011] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:06:04,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:06:04,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [20] total 33 [2021-11-02 23:06:04,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424688360] [2021-11-02 23:06:04,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:06:04,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:04,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:06:04,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1021, Unknown=3, NotChecked=0, Total=1122 [2021-11-02 23:06:04,705 INFO L87 Difference]: Start difference. First operand 155 states and 192 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) [2021-11-02 23:06:28,140 WARN L207 SmtUtils]: Spent 6.12 s on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2021-11-02 23:06:35,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:06:35,146 INFO L93 Difference]: Finished difference Result 173 states and 210 transitions. [2021-11-02 23:06:35,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:06:35,147 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 [2021-11-02 23:06:35,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:06:35,149 INFO L225 Difference]: With dead ends: 173 [2021-11-02 23:06:35,149 INFO L226 Difference]: Without dead ends: 173 [2021-11-02 23:06:35,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=160, Invalid=1477, Unknown=3, NotChecked=0, Total=1640 [2021-11-02 23:06:35,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-02 23:06:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 155. [2021-11-02 23:06:35,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 107 states have (on average 1.588785046728972) internal successors, (170), 136 states have internal predecessors, (170), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 23:06:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 192 transitions. [2021-11-02 23:06:35,159 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 192 transitions. Word has length 61 [2021-11-02 23:06:35,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:06:35,159 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 192 transitions. [2021-11-02 23:06:35,160 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) [2021-11-02 23:06:35,160 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 192 transitions. [2021-11-02 23:06:35,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 23:06:35,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:06:35,161 INFO L513 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] [2021-11-02 23:06:35,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-02 23:06:35,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:35,376 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting dll_appendErr7REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-02 23:06:35,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:06:35,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1780288291, now seen corresponding path program 1 times [2021-11-02 23:06:35,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:06:35,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989881717] [2021-11-02 23:06:35,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:35,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:06:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:35,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:06:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:35,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:06:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:35,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 23:06:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:35,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-02 23:06:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:36,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-02 23:06:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 23:06:37,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:06:37,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989881717] [2021-11-02 23:06:37,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989881717] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:37,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969889735] [2021-11-02 23:06:37,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:06:37,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:06:37,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:06:37,272 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:06:37,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:06:37,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:06:37,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-02 23:06:37,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:06:37,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 23:06:38,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-02 23:06:38,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-02 23:06:51,876 INFO L354 Elim1Store]: treesize reduction 187, result has 12.2 percent of original size [2021-11-02 23:06:51,877 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 99 treesize of output 91 [2021-11-02 23:06:51,978 INFO L354 Elim1Store]: treesize reduction 187, result has 12.2 percent of original size [2021-11-02 23:06:51,978 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 84 [2021-11-02 23:06:52,001 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-02 23:06:52,001 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 85 treesize of output 85 [2021-11-02 23:06:52,028 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-02 23:06:52,029 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 79 treesize of output 81 [2021-11-02 23:06:52,678 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-02 23:06:52,679 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 92 treesize of output 68 [2021-11-02 23:06:52,714 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-02 23:06:52,715 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 59 treesize of output 35 [2021-11-02 23:06:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:06:53,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969889735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:06:53,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:06:53,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 40 [2021-11-02 23:06:53,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095290631] [2021-11-02 23:06:53,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-02 23:06:53,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:06:53,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-02 23:06:53,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1518, Unknown=5, NotChecked=0, Total=1640 [2021-11-02 23:06:53,096 INFO L87 Difference]: Start difference. First operand 155 states and 192 transitions. Second operand has 41 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 32 states have internal predecessors, (83), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-02 23:08:18,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:18,992 INFO L93 Difference]: Finished difference Result 184 states and 224 transitions. [2021-11-02 23:08:18,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:08:18,993 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 32 states have internal predecessors, (83), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) Word has length 61 [2021-11-02 23:08:18,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:18,995 INFO L225 Difference]: With dead ends: 184 [2021-11-02 23:08:18,995 INFO L226 Difference]: Without dead ends: 184 [2021-11-02 23:08:18,997 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 48.1s TimeCoverageRelationStatistics Valid=274, Invalid=3252, Unknown=14, NotChecked=0, Total=3540 [2021-11-02 23:08:18,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-02 23:08:19,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 161. [2021-11-02 23:08:19,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 113 states have (on average 1.5575221238938053) internal successors, (176), 142 states have internal predecessors, (176), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 23:08:19,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 198 transitions. [2021-11-02 23:08:19,007 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 198 transitions. Word has length 61 [2021-11-02 23:08:19,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:19,007 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 198 transitions. [2021-11-02 23:08:19,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 32 states have internal predecessors, (83), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-11-02 23:08:19,008 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 198 transitions. [2021-11-02 23:08:19,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:08:19,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:19,009 INFO L513 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] [2021-11-02 23:08:19,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:19,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 23:08:19,228 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting dll_appendErr13REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-02 23:08:19,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:19,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1982666411, now seen corresponding path program 1 times [2021-11-02 23:08:19,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:19,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025440967] [2021-11-02 23:08:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:19,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:19,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:08:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:19,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:08:19,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:19,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 23:08:19,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:19,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-02 23:08:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:19,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-02 23:08:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-02 23:08:19,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:19,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025440967] [2021-11-02 23:08:19,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025440967] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:19,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:19,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 23:08:19,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222694920] [2021-11-02 23:08:19,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:08:19,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:19,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:08:19,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:08:19,686 INFO L87 Difference]: Start difference. First operand 161 states and 198 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) [2021-11-02 23:08:20,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:20,983 INFO L93 Difference]: Finished difference Result 173 states and 210 transitions. [2021-11-02 23:08:20,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:08:20,983 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 [2021-11-02 23:08:20,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:20,985 INFO L225 Difference]: With dead ends: 173 [2021-11-02 23:08:20,985 INFO L226 Difference]: Without dead ends: 173 [2021-11-02 23:08:20,985 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:08:20,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-02 23:08:20,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 160. [2021-11-02 23:08:20,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 113 states have (on average 1.5398230088495575) internal successors, (174), 141 states have internal predecessors, (174), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 23:08:20,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 196 transitions. [2021-11-02 23:08:20,994 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 196 transitions. Word has length 64 [2021-11-02 23:08:20,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:20,995 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 196 transitions. [2021-11-02 23:08:20,995 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) [2021-11-02 23:08:20,995 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 196 transitions. [2021-11-02 23:08:20,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:08:20,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:20,997 INFO L513 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] [2021-11-02 23:08:20,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 23:08:20,997 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting dll_appendErr12REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-02 23:08:20,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:20,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1982666410, now seen corresponding path program 1 times [2021-11-02 23:08:20,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:20,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273866005] [2021-11-02 23:08:20,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:20,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:21,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:08:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:21,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:08:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:21,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 23:08:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:21,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-02 23:08:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:21,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-02 23:08:21,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-02 23:08:21,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:21,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273866005] [2021-11-02 23:08:21,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273866005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:21,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:21,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 23:08:21,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021221583] [2021-11-02 23:08:21,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 23:08:21,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:21,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 23:08:21,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:08:21,312 INFO L87 Difference]: Start difference. First operand 160 states and 196 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) [2021-11-02 23:08:22,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:22,458 INFO L93 Difference]: Finished difference Result 172 states and 208 transitions. [2021-11-02 23:08:22,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:08:22,459 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 [2021-11-02 23:08:22,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:22,460 INFO L225 Difference]: With dead ends: 172 [2021-11-02 23:08:22,461 INFO L226 Difference]: Without dead ends: 172 [2021-11-02 23:08:22,461 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:08:22,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-02 23:08:22,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 159. [2021-11-02 23:08:22,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 113 states have (on average 1.5221238938053097) internal successors, (172), 140 states have internal predecessors, (172), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 23:08:22,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 194 transitions. [2021-11-02 23:08:22,469 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 194 transitions. Word has length 64 [2021-11-02 23:08:22,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:22,469 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 194 transitions. [2021-11-02 23:08:22,470 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) [2021-11-02 23:08:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 194 transitions. [2021-11-02 23:08:22,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:08:22,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:22,471 INFO L513 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] [2021-11-02 23:08:22,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 23:08:22,472 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-02 23:08:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:22,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1726564691, now seen corresponding path program 1 times [2021-11-02 23:08:22,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:22,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539197697] [2021-11-02 23:08:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:22,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:22,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:08:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:22,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:08:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:22,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 23:08:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:22,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-02 23:08:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:22,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-02 23:08:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:23,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 23:08:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-02 23:08:23,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:23,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539197697] [2021-11-02 23:08:23,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539197697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:23,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:23,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-02 23:08:23,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163442195] [2021-11-02 23:08:23,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:08:23,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:23,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:08:23,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:08:23,185 INFO L87 Difference]: Start difference. First operand 159 states and 194 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) [2021-11-02 23:08:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:25,479 INFO L93 Difference]: Finished difference Result 221 states and 273 transitions. [2021-11-02 23:08:25,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:08:25,480 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 [2021-11-02 23:08:25,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:25,482 INFO L225 Difference]: With dead ends: 221 [2021-11-02 23:08:25,482 INFO L226 Difference]: Without dead ends: 221 [2021-11-02 23:08:25,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:08:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-02 23:08:25,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 168. [2021-11-02 23:08:25,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 123 states have (on average 1.4796747967479675) internal successors, (182), 147 states have internal predecessors, (182), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-02 23:08:25,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 206 transitions. [2021-11-02 23:08:25,493 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 206 transitions. Word has length 64 [2021-11-02 23:08:25,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:25,493 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 206 transitions. [2021-11-02 23:08:25,494 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) [2021-11-02 23:08:25,494 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 206 transitions. [2021-11-02 23:08:25,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 23:08:25,495 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:25,495 INFO L513 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] [2021-11-02 23:08:25,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 23:08:25,496 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr3REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-02 23:08:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:25,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1726564692, now seen corresponding path program 1 times [2021-11-02 23:08:25,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:25,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720511158] [2021-11-02 23:08:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:25,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:25,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:08:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:25,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:08:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:25,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 23:08:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:25,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-02 23:08:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:25,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-02 23:08:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:26,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 23:08:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-02 23:08:26,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:26,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720511158] [2021-11-02 23:08:26,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720511158] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:26,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:26,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-02 23:08:26,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905150153] [2021-11-02 23:08:26,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:08:26,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:26,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:08:26,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:08:26,290 INFO L87 Difference]: Start difference. First operand 168 states and 206 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) [2021-11-02 23:08:28,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:28,645 INFO L93 Difference]: Finished difference Result 242 states and 301 transitions. [2021-11-02 23:08:28,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:08:28,645 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 [2021-11-02 23:08:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:28,648 INFO L225 Difference]: With dead ends: 242 [2021-11-02 23:08:28,648 INFO L226 Difference]: Without dead ends: 242 [2021-11-02 23:08:28,648 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:08:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-02 23:08:28,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 182. [2021-11-02 23:08:28,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 137 states have (on average 1.4598540145985401) internal successors, (200), 161 states have internal predecessors, (200), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-02 23:08:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 224 transitions. [2021-11-02 23:08:28,659 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 224 transitions. Word has length 64 [2021-11-02 23:08:28,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:28,660 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 224 transitions. [2021-11-02 23:08:28,660 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) [2021-11-02 23:08:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 224 transitions. [2021-11-02 23:08:28,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 23:08:28,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:28,661 INFO L513 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] [2021-11-02 23:08:28,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 23:08:28,662 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting dll_appendErr6REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-02 23:08:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:28,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1333169234, now seen corresponding path program 1 times [2021-11-02 23:08:28,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:28,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782172638] [2021-11-02 23:08:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:28,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:29,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:08:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:29,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:08:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:30,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 23:08:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:30,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-02 23:08:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:31,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-02 23:08:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:33,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:33,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782172638] [2021-11-02 23:08:33,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782172638] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:33,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095253205] [2021-11-02 23:08:33,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:33,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:33,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:33,132 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:33,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:08:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:33,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-02 23:08:33,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:34,141 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:08:34,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 23:08:34,476 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 [2021-11-02 23:08:34,732 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 23:08:34,732 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 52 treesize of output 51 [2021-11-02 23:08:34,962 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_create_~head~0.offset] [2021-11-02 23:08:34,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:08:34,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-02 23:08:34,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825322791] [2021-11-02 23:08:34,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:08:34,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:34,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:08:34,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:08:34,965 INFO L87 Difference]: Start difference. First operand 182 states and 224 transitions. Second operand has 31 states, 27 states have (on average 1.962962962962963) internal successors, (53), 25 states have internal predecessors, (53), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-02 23:08:56,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:56,736 INFO L93 Difference]: Finished difference Result 200 states and 244 transitions. [2021-11-02 23:08:56,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:08:56,737 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 27 states have (on average 1.962962962962963) internal successors, (53), 25 states have internal predecessors, (53), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 65 [2021-11-02 23:08:56,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:56,738 INFO L225 Difference]: With dead ends: 200 [2021-11-02 23:08:56,739 INFO L226 Difference]: Without dead ends: 200 [2021-11-02 23:08:56,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=295, Invalid=3365, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 23:08:56,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-02 23:08:56,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 186. [2021-11-02 23:08:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.4609929078014185) internal successors, (206), 165 states have internal predecessors, (206), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-02 23:08:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 230 transitions. [2021-11-02 23:08:56,749 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 230 transitions. Word has length 65 [2021-11-02 23:08:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:56,750 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 230 transitions. [2021-11-02 23:08:56,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 27 states have (on average 1.962962962962963) internal successors, (53), 25 states have internal predecessors, (53), 5 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-02 23:08:56,750 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 230 transitions. [2021-11-02 23:08:56,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-02 23:08:56,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:56,752 INFO L513 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] [2021-11-02 23:08:56,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:56,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:56,963 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting dll_appendErr7REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-02 23:08:56,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:56,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1333169235, now seen corresponding path program 1 times [2021-11-02 23:08:56,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:56,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340426934] [2021-11-02 23:08:56,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:56,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:57,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:08:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:58,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:08:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:59,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 23:08:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:59,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-02 23:08:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:00,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-02 23:09:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:09:02,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:02,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340426934] [2021-11-02 23:09:02,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340426934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:02,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32387737] [2021-11-02 23:09:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:02,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:02,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:02,908 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:02,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:09:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:03,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-02 23:09:03,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:05,317 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:09:05,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 23:09:05,911 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 [2021-11-02 23:09:05,939 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 [2021-11-02 23:09:06,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:09:06,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 54 [2021-11-02 23:09:06,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:09:06,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 71 [2021-11-02 23:09:08,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:09:08,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 53 [2021-11-02 23:09:08,699 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 23:09:08,699 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 44 treesize of output 40 [2021-11-02 23:09:08,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:09:08,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 22 [2021-11-02 23:09:37,256 INFO L354 Elim1Store]: treesize reduction 397, result has 9.2 percent of original size [2021-11-02 23:09:37,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 177 treesize of output 137 [2021-11-02 23:09:37,312 INFO L354 Elim1Store]: treesize reduction 41, result has 24.1 percent of original size [2021-11-02 23:09:37,313 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 170 treesize of output 165 [2021-11-02 23:09:37,631 INFO L354 Elim1Store]: treesize reduction 541, result has 8.8 percent of original size [2021-11-02 23:09:37,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 162 treesize of output 164 [2021-11-02 23:09:37,688 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-02 23:09:37,688 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 155 treesize of output 157 [2021-11-02 23:09:41,312 INFO L354 Elim1Store]: treesize reduction 184, result has 1.6 percent of original size [2021-11-02 23:09:41,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 182 treesize of output 101 [2021-11-02 23:09:41,371 INFO L354 Elim1Store]: treesize reduction 154, result has 1.9 percent of original size [2021-11-02 23:09:41,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 80 treesize of output 54 [2021-11-02 23:09:41,930 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:41,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32387737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:41,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:41,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2021-11-02 23:09:41,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708125273] [2021-11-02 23:09:41,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-02 23:09:41,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:41,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-02 23:09:41,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3694, Unknown=11, NotChecked=0, Total=3906 [2021-11-02 23:09:41,936 INFO L87 Difference]: Start difference. First operand 186 states and 230 transitions. Second operand has 63 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 51 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) [2021-11-02 23:12:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:01,221 INFO L93 Difference]: Finished difference Result 213 states and 258 transitions. [2021-11-02 23:12:01,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:12:01,222 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 51 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 [2021-11-02 23:12:01,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:01,224 INFO L225 Difference]: With dead ends: 213 [2021-11-02 23:12:01,224 INFO L226 Difference]: Without dead ends: 213 [2021-11-02 23:12:01,227 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 80.3s TimeCoverageRelationStatistics Valid=439, Invalid=6852, Unknown=19, NotChecked=0, Total=7310 [2021-11-02 23:12:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-11-02 23:12:01,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 190. [2021-11-02 23:12:01,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 145 states have (on average 1.4482758620689655) internal successors, (210), 169 states have internal predecessors, (210), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-02 23:12:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 234 transitions. [2021-11-02 23:12:01,236 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 234 transitions. Word has length 65 [2021-11-02 23:12:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:01,236 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 234 transitions. [2021-11-02 23:12:01,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 56 states have (on average 1.8392857142857142) internal successors, (103), 51 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) [2021-11-02 23:12:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 234 transitions. [2021-11-02 23:12:01,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-02 23:12:01,238 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:01,239 INFO L513 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] [2021-11-02 23:12:01,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:01,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-11-02 23:12:01,464 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr14ASSERT_VIOLATIONMEMORY_LEAK === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-02 23:12:01,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:01,464 INFO L85 PathProgramCache]: Analyzing trace with hash -439504048, now seen corresponding path program 1 times [2021-11-02 23:12:01,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:01,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443011493] [2021-11-02 23:12:01,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:01,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:01,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:12:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:01,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:12:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:02,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 23:12:02,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:02,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-02 23:12:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:02,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-02 23:12:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:02,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 23:12:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:03,420 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 23:12:03,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:03,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443011493] [2021-11-02 23:12:03,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443011493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:03,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789429323] [2021-11-02 23:12:03,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:03,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:03,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:03,422 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:03,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:12:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:03,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-02 23:12:04,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:04,792 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 [2021-11-02 23:12:07,668 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 [2021-11-02 23:12:22,017 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int) (v_DerPreprocessor_1 Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= (select (select (store |c_old(#memory_$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_1)) |c_dll_append_#in~head.base|) |c_dll_append_#in~head.offset|) |c_dll_append_#t~mem10.base|))) is different from true [2021-11-02 23:12:24,053 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int) (v_DerPreprocessor_1 Int)) (and (= (select (select (store |c_old(#memory_$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_1)) |c_dll_append_#in~head.base|) |c_dll_append_#in~head.offset|) 0) (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|))) is different from true [2021-11-02 23:12:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2021-11-02 23:12:24,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789429323] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:24,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:24,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 32 [2021-11-02 23:12:24,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088940661] [2021-11-02 23:12:24,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 23:12:24,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:24,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 23:12:24,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=725, Unknown=8, NotChecked=168, Total=992 [2021-11-02 23:12:24,160 INFO L87 Difference]: Start difference. First operand 190 states and 234 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) [2021-11-02 23:12:57,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:57,161 INFO L93 Difference]: Finished difference Result 183 states and 218 transitions. [2021-11-02 23:12:57,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:12:57,162 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 [2021-11-02 23:12:57,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:57,163 INFO L225 Difference]: With dead ends: 183 [2021-11-02 23:12:57,163 INFO L226 Difference]: Without dead ends: 178 [2021-11-02 23:12:57,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 47.5s TimeCoverageRelationStatistics Valid=185, Invalid=1793, Unknown=14, NotChecked=264, Total=2256 [2021-11-02 23:12:57,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-02 23:12:57,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 165. [2021-11-02 23:12:57,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 122 states have (on average 1.4508196721311475) internal successors, (177), 146 states have internal predecessors, (177), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 23:12:57,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 199 transitions. [2021-11-02 23:12:57,172 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 199 transitions. Word has length 67 [2021-11-02 23:12:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:57,172 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 199 transitions. [2021-11-02 23:12:57,173 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) [2021-11-02 23:12:57,173 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 199 transitions. [2021-11-02 23:12:57,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 23:12:57,174 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:57,174 INFO L513 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] [2021-11-02 23:12:57,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:57,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-02 23:12:57,389 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-02 23:12:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:57,389 INFO L85 PathProgramCache]: Analyzing trace with hash 232427872, now seen corresponding path program 1 times [2021-11-02 23:12:57,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:57,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945499402] [2021-11-02 23:12:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:57,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:57,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:12:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:57,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:12:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:58,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 23:12:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:58,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-02 23:12:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:58,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-02 23:12:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:59,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 23:12:59,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 23:13:00,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:00,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945499402] [2021-11-02 23:13:00,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945499402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:13:00,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:13:00,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-02 23:13:00,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708483140] [2021-11-02 23:13:00,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:13:00,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:00,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:13:00,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:13:00,661 INFO L87 Difference]: Start difference. First operand 165 states and 199 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) [2021-11-02 23:13:08,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:08,482 INFO L93 Difference]: Finished difference Result 232 states and 284 transitions. [2021-11-02 23:13:08,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:13:08,483 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 [2021-11-02 23:13:08,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:08,486 INFO L225 Difference]: With dead ends: 232 [2021-11-02 23:13:08,487 INFO L226 Difference]: Without dead ends: 232 [2021-11-02 23:13:08,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=140, Invalid=1582, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 23:13:08,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-02 23:13:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 179. [2021-11-02 23:13:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 134 states have (on average 1.4402985074626866) internal successors, (193), 158 states have internal predecessors, (193), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-02 23:13:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 217 transitions. [2021-11-02 23:13:08,499 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 217 transitions. Word has length 69 [2021-11-02 23:13:08,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:08,500 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 217 transitions. [2021-11-02 23:13:08,500 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) [2021-11-02 23:13:08,501 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 217 transitions. [2021-11-02 23:13:08,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-02 23:13:08,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:08,502 INFO L513 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] [2021-11-02 23:13:08,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 23:13:08,503 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr3REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 43 more)] === [2021-11-02 23:13:08,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:08,503 INFO L85 PathProgramCache]: Analyzing trace with hash 232427873, now seen corresponding path program 1 times [2021-11-02 23:13:08,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:08,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775500801] [2021-11-02 23:13:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:08,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:08,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:13:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:09,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 23:13:09,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:09,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-02 23:13:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:09,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-02 23:13:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:09,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-02 23:13:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:11,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 23:13:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:13,597 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 23:13:13,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:13,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775500801] [2021-11-02 23:13:13,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775500801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:13,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117219274] [2021-11-02 23:13:13,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:13,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:13,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:13,600 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:13,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99b5196d-f4fa-4918-8f6e-587dec69ba2f/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:13:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:14,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-02 23:13:14,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:16,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-02 23:13:16,424 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 [2021-11-02 23:13:59,877 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_append_~new_last~0.base Int) (dll_append_~last~0.offset Int) (node_create_~temp~0.offset Int) (v_DerPreprocessor_3 Int) (dll_append_~new_last~0.offset Int) (node_create_~temp~0.base Int) (v_DerPreprocessor_2 Int)) (let ((.cse7 (+ node_create_~temp~0.offset 4)) (.cse8 (+ node_create_~temp~0.offset 8))) (let ((.cse3 (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) .cse7 0) .cse8 0) node_create_~temp~0.offset v_DerPreprocessor_2)))) (let ((.cse2 (+ dll_append_~new_last~0.offset 8)) (.cse0 (select (select .cse3 |c_dll_append_#in~head.base|) |c_dll_append_#in~head.offset|)) (.cse4 (+ dll_append_~last~0.offset 4)) (.cse6 (store |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base) .cse7 0) .cse8 0) node_create_~temp~0.offset v_DerPreprocessor_3)))) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (<= (+ dll_append_~last~0.offset 8) (select |c_#length| .cse0)) (<= dll_append_~new_last~0.base node_create_~temp~0.base) (= (let ((.cse1 (store .cse3 .cse0 (store (select .cse3 .cse0) .cse4 dll_append_~new_last~0.base)))) (store .cse1 dll_append_~new_last~0.base (store (select .cse1 dll_append_~new_last~0.base) .cse2 .cse0))) |c_#memory_$Pointer$.base|) (= (let ((.cse5 (store .cse6 .cse0 (store (select .cse6 .cse0) .cse4 dll_append_~new_last~0.offset)))) (store .cse5 dll_append_~new_last~0.base (store (select .cse5 dll_append_~new_last~0.base) .cse2 dll_append_~last~0.offset))) |c_#memory_$Pointer$.offset|) (<= (select (select .cse6 |c_dll_append_#in~head.base|) |c_dll_append_#in~head.offset|) dll_append_~last~0.offset)))))) is different from true [2021-11-02 23:14:07,289 WARN L207 SmtUtils]: Spent 6.39 s on a formula simplification. DAG size of input: 227 DAG size of output: 91 [2021-11-02 23:14:07,290 INFO L354 Elim1Store]: treesize reduction 1696, result has 13.2 percent of original size [2021-11-02 23:14:07,291 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 2240 treesize of output 1667 [2021-11-02 23:14:09,506 INFO L354 Elim1Store]: treesize reduction 2137, result has 17.9 percent of original size [2021-11-02 23:14:09,506 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 2526 treesize of output 1903 [2021-11-02 23:14:31,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:14:31,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:14:31,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:14:31,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:14:31,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:14:31,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:14:32,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 23:14:32,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 148 treesize of output 242