./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y --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 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:45:43,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:45:43,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:45:43,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:45:43,547 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:45:43,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:45:43,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:45:43,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:45:43,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:45:43,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:45:43,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:45:43,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:45:43,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:45:43,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:45:43,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:45:43,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:45:43,583 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:45:43,584 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:45:43,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:45:43,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:45:43,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:45:43,594 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:45:43,595 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:45:43,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:45:43,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:45:43,601 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:45:43,602 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:45:43,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:45:43,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:45:43,605 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:45:43,606 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:45:43,607 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:45:43,608 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:45:43,609 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:45:43,610 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:45:43,610 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:45:43,611 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:45:43,611 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:45:43,612 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:45:43,613 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:45:43,614 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:45:43,614 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-13 18:45:43,650 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:45:43,650 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:45:43,651 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:45:43,651 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:45:43,652 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:45:43,652 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:45:43,653 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:45:43,653 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:45:43,653 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:45:43,654 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:45:43,654 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:45:43,654 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 18:45:43,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:45:43,655 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:45:43,655 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:45:43,655 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 18:45:43,655 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 18:45:43,656 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 18:45:43,656 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:45:43,656 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 18:45:43,656 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:45:43,657 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:45:43,657 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:45:43,657 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:45:43,657 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:45:43,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:45:43,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:45:43,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:45:43,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:45:43,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:45:43,659 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:45:43,659 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_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a59620f668b7c0725f940bc66e10441fbb56ee9b9fb687de4bd19a3f12eaeda [2021-11-13 18:45:43,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:45:43,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:45:43,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:45:43,978 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:45:43,979 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:45:43,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/list-simple/dll2n_append_equal.i [2021-11-13 18:45:44,095 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/data/45561824c/edf2b51507d14c5fb0ec6201e4354aee/FLAGdd38db73c [2021-11-13 18:45:44,662 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:45:44,662 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/sv-benchmarks/c/list-simple/dll2n_append_equal.i [2021-11-13 18:45:44,676 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/data/45561824c/edf2b51507d14c5fb0ec6201e4354aee/FLAGdd38db73c [2021-11-13 18:45:44,947 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/data/45561824c/edf2b51507d14c5fb0ec6201e4354aee [2021-11-13 18:45:44,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:45:44,951 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-13 18:45:44,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:45:44,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:45:44,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:45:44,958 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:45:44" (1/1) ... [2021-11-13 18:45:44,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aa3435c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:44, skipping insertion in model container [2021-11-13 18:45:44,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:45:44" (1/1) ... [2021-11-13 18:45:44,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:45:45,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:45:45,326 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_e35f90cc-2680-4e83-9082-f076c097ca3c/sv-benchmarks/c/list-simple/dll2n_append_equal.i[24333,24346] [2021-11-13 18:45:45,337 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:45:45,353 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:45:45,396 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_e35f90cc-2680-4e83-9082-f076c097ca3c/sv-benchmarks/c/list-simple/dll2n_append_equal.i[24333,24346] [2021-11-13 18:45:45,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:45:45,426 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:45:45,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:45 WrapperNode [2021-11-13 18:45:45,427 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:45:45,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:45:45,429 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:45:45,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:45:45,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:45" (1/1) ... [2021-11-13 18:45:45,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:45" (1/1) ... [2021-11-13 18:45:45,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:45" (1/1) ... [2021-11-13 18:45:45,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:45" (1/1) ... [2021-11-13 18:45:45,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:45" (1/1) ... [2021-11-13 18:45:45,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:45" (1/1) ... [2021-11-13 18:45:45,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:45" (1/1) ... [2021-11-13 18:45:45,518 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:45:45,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:45:45,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:45:45,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:45:45,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:45" (1/1) ... [2021-11-13 18:45:45,541 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:45:45,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:45,568 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:45:45,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:45:45,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-13 18:45:45,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:45:45,610 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-13 18:45:45,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-13 18:45:45,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-13 18:45:45,610 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-13 18:45:45,610 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-13 18:45:45,610 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2021-11-13 18:45:45,610 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2021-11-13 18:45:45,611 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_append [2021-11-13 18:45:45,611 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-13 18:45:45,611 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-13 18:45:45,611 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-13 18:45:45,611 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-13 18:45:45,611 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-13 18:45:45,611 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-13 18:45:45,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:45:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-13 18:45:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-13 18:45:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-13 18:45:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-13 18:45:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-13 18:45:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-13 18:45:45,612 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-13 18:45:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-13 18:45:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-13 18:45:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-13 18:45:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-13 18:45:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-13 18:45:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-13 18:45:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-13 18:45:45,613 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-13 18:45:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-13 18:45:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-13 18:45:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-13 18:45:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-13 18:45:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-13 18:45:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-13 18:45:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-13 18:45:45,614 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-13 18:45:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-13 18:45:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-13 18:45:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-13 18:45:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-13 18:45:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-13 18:45:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-13 18:45:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-13 18:45:45,615 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-13 18:45:45,616 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-13 18:45:45,616 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-13 18:45:45,616 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-13 18:45:45,616 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-13 18:45:45,616 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-13 18:45:45,616 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-13 18:45:45,616 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-13 18:45:45,616 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-13 18:45:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-13 18:45:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-13 18:45:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-13 18:45:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-13 18:45:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-13 18:45:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-13 18:45:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-13 18:45:45,617 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-13 18:45:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-13 18:45:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-13 18:45:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-13 18:45:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-13 18:45:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-13 18:45:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-13 18:45:45,618 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-13 18:45:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-13 18:45:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-13 18:45:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-13 18:45:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-13 18:45:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-13 18:45:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-13 18:45:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-13 18:45:45,619 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-13 18:45:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-13 18:45:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-13 18:45:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-13 18:45:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-13 18:45:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-13 18:45:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-13 18:45:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-13 18:45:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-13 18:45:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-13 18:45:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-13 18:45:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-13 18:45:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-13 18:45:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-13 18:45:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-13 18:45:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-13 18:45:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-13 18:45:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-13 18:45:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-13 18:45:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-13 18:45:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-13 18:45:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-13 18:45:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-13 18:45:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-13 18:45:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-13 18:45:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-13 18:45:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-13 18:45:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-13 18:45:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-13 18:45:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-13 18:45:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-13 18:45:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-13 18:45:45,623 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-13 18:45:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-13 18:45:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-13 18:45:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-13 18:45:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-13 18:45:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-13 18:45:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-13 18:45:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-13 18:45:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-13 18:45:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-13 18:45:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-13 18:45:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-13 18:45:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-13 18:45:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:45:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:45:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:45:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2021-11-13 18:45:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2021-11-13 18:45:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:45:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:45:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure dll_append [2021-11-13 18:45:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-13 18:45:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:45:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:45:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-13 18:45:45,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:45:45,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:45:46,039 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-13 18:45:46,316 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:45:46,316 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-13 18:45:46,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:45:46 BoogieIcfgContainer [2021-11-13 18:45:46,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:45:46,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:45:46,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:45:46,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:45:46,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:45:44" (1/3) ... [2021-11-13 18:45:46,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de66afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:45:46, skipping insertion in model container [2021-11-13 18:45:46,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:45:45" (2/3) ... [2021-11-13 18:45:46,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de66afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:45:46, skipping insertion in model container [2021-11-13 18:45:46,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:45:46" (3/3) ... [2021-11-13 18:45:46,333 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_append_equal.i [2021-11-13 18:45:46,340 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:45:46,341 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-11-13 18:45:46,389 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:45:46,397 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 [2021-11-13 18:45:46,397 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-11-13 18:45:46,415 INFO L276 IsEmpty]: Start isEmpty. Operand has 114 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 99 states have internal predecessors, (112), 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) [2021-11-13 18:45:46,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 18:45:46,424 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:46,425 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:46,425 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:45:46,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:46,431 INFO L85 PathProgramCache]: Analyzing trace with hash -378573798, now seen corresponding path program 1 times [2021-11-13 18:45:46,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:46,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343142365] [2021-11-13 18:45:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:46,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:46,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:46,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:45:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:46,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:46,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343142365] [2021-11-13 18:45:46,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343142365] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:46,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:46,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:45:46,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180368462] [2021-11-13 18:45:46,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:46,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:45:46,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:46,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:45:46,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:45:46,763 INFO L87 Difference]: Start difference. First operand has 114 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 99 states have internal predecessors, (112), 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) [2021-11-13 18:45:47,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:47,157 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2021-11-13 18:45:47,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:45:47,160 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 [2021-11-13 18:45:47,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:47,179 INFO L225 Difference]: With dead ends: 129 [2021-11-13 18:45:47,179 INFO L226 Difference]: Without dead ends: 123 [2021-11-13 18:45:47,181 INFO L932 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 [2021-11-13 18:45:47,189 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 30 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 239.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.77ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 314.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:47,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 154 Invalid, 192 Unknown, 0 Unchecked, 14.77ms Time], IncrementalHoareTripleChecker [10 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 314.04ms Time] [2021-11-13 18:45:47,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-13 18:45:47,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2021-11-13 18:45:47,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 55 states have (on average 1.8) internal successors, (99), 92 states have internal predecessors, (99), 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) [2021-11-13 18:45:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2021-11-13 18:45:47,261 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 13 [2021-11-13 18:45:47,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:47,263 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2021-11-13 18:45:47,263 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) [2021-11-13 18:45:47,264 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2021-11-13 18:45:47,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 18:45:47,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:47,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:47,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:45:47,268 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:45:47,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:47,274 INFO L85 PathProgramCache]: Analyzing trace with hash -378573797, now seen corresponding path program 1 times [2021-11-13 18:45:47,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:47,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318620699] [2021-11-13 18:45:47,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:47,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:47,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:47,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:45:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:47,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:47,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318620699] [2021-11-13 18:45:47,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318620699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:47,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:47,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:45:47,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211342207] [2021-11-13 18:45:47,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:47,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:45:47,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:47,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:45:47,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:45:47,414 INFO L87 Difference]: Start difference. First operand 105 states and 112 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) [2021-11-13 18:45:47,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:47,695 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2021-11-13 18:45:47,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:45:47,696 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 [2021-11-13 18:45:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:47,704 INFO L225 Difference]: With dead ends: 120 [2021-11-13 18:45:47,706 INFO L226 Difference]: Without dead ends: 120 [2021-11-13 18:45:47,706 INFO L932 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 [2021-11-13 18:45:47,708 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 24 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.97ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 258.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:47,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 146 Invalid, 176 Unknown, 0 Unchecked, 4.97ms Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 258.88ms Time] [2021-11-13 18:45:47,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-13 18:45:47,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-11-13 18:45:47,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 89 states have internal predecessors, (96), 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) [2021-11-13 18:45:47,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2021-11-13 18:45:47,732 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 13 [2021-11-13 18:45:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:47,733 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2021-11-13 18:45:47,733 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) [2021-11-13 18:45:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2021-11-13 18:45:47,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-13 18:45:47,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:47,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:47,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:45:47,736 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting dll_createErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:45:47,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:47,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1486986452, now seen corresponding path program 1 times [2021-11-13 18:45:47,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:47,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056727275] [2021-11-13 18:45:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:47,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:47,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:45:47,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:47,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:45:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:47,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:47,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056727275] [2021-11-13 18:45:47,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056727275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:47,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:47,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:45:47,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821932170] [2021-11-13 18:45:47,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:47,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:45:47,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:47,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:45:47,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:45:47,974 INFO L87 Difference]: Start difference. First operand 102 states and 109 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) [2021-11-13 18:45:48,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:48,370 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2021-11-13 18:45:48,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:45:48,371 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 [2021-11-13 18:45:48,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:48,373 INFO L225 Difference]: With dead ends: 118 [2021-11-13 18:45:48,373 INFO L226 Difference]: Without dead ends: 118 [2021-11-13 18:45:48,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:45:48,375 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 55 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 281.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.82ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 341.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:48,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 293 Invalid, 464 Unknown, 0 Unchecked, 6.82ms Time], IncrementalHoareTripleChecker [15 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 341.26ms Time] [2021-11-13 18:45:48,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-13 18:45:48,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 100. [2021-11-13 18:45:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 55 states have (on average 1.709090909090909) internal successors, (94), 87 states have internal predecessors, (94), 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) [2021-11-13 18:45:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2021-11-13 18:45:48,387 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 20 [2021-11-13 18:45:48,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:48,388 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2021-11-13 18:45:48,388 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) [2021-11-13 18:45:48,388 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2021-11-13 18:45:48,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-13 18:45:48,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:48,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:48,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:45:48,390 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_createErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:45:48,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:48,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1486986451, now seen corresponding path program 1 times [2021-11-13 18:45:48,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:48,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256694610] [2021-11-13 18:45:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:48,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:48,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:45:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:48,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:45:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:48,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:48,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256694610] [2021-11-13 18:45:48,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256694610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:48,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:48,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:45:48,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145910089] [2021-11-13 18:45:48,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:48,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:45:48,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:48,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:45:48,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:45:48,558 INFO L87 Difference]: Start difference. First operand 100 states and 107 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) [2021-11-13 18:45:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:48,977 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2021-11-13 18:45:48,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:45:48,978 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 [2021-11-13 18:45:48,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:48,980 INFO L225 Difference]: With dead ends: 116 [2021-11-13 18:45:48,980 INFO L226 Difference]: Without dead ends: 116 [2021-11-13 18:45:48,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:45:48,982 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 52 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 278.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.85ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 340.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:48,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 301 Invalid, 443 Unknown, 0 Unchecked, 6.85ms Time], IncrementalHoareTripleChecker [14 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 340.77ms Time] [2021-11-13 18:45:48,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-13 18:45:48,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 98. [2021-11-13 18:45:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 55 states have (on average 1.6727272727272726) internal successors, (92), 85 states have internal predecessors, (92), 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) [2021-11-13 18:45:48,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2021-11-13 18:45:48,993 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 20 [2021-11-13 18:45:48,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:48,994 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2021-11-13 18:45:48,994 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) [2021-11-13 18:45:48,994 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2021-11-13 18:45:48,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-13 18:45:48,995 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:48,996 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:48,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:45:48,996 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting dll_createErr4REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:45:48,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:48,997 INFO L85 PathProgramCache]: Analyzing trace with hash -520564386, now seen corresponding path program 1 times [2021-11-13 18:45:48,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:48,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2705859] [2021-11-13 18:45:48,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:48,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:45:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:45:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:49,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:49,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2705859] [2021-11-13 18:45:49,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2705859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:49,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:49,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:45:49,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750638390] [2021-11-13 18:45:49,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:49,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:45:49,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:49,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:45:49,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:45:49,121 INFO L87 Difference]: Start difference. First operand 98 states and 105 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) [2021-11-13 18:45:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:49,366 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2021-11-13 18:45:49,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:45:49,366 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 [2021-11-13 18:45:49,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:49,368 INFO L225 Difference]: With dead ends: 121 [2021-11-13 18:45:49,368 INFO L226 Difference]: Without dead ends: 121 [2021-11-13 18:45:49,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:45:49,369 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 42 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.28ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 180.85ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:49,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 207 Invalid, 209 Unknown, 0 Unchecked, 3.28ms Time], IncrementalHoareTripleChecker [15 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 180.85ms Time] [2021-11-13 18:45:49,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-13 18:45:49,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 104. [2021-11-13 18:45:49,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.6333333333333333) internal successors, (98), 90 states have internal predecessors, (98), 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) [2021-11-13 18:45:49,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 113 transitions. [2021-11-13 18:45:49,392 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 113 transitions. Word has length 23 [2021-11-13 18:45:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:49,393 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 113 transitions. [2021-11-13 18:45:49,393 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) [2021-11-13 18:45:49,399 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 113 transitions. [2021-11-13 18:45:49,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-13 18:45:49,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:49,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:49,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:45:49,401 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_appendErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:45:49,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:49,401 INFO L85 PathProgramCache]: Analyzing trace with hash 994259372, now seen corresponding path program 1 times [2021-11-13 18:45:49,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:49,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131797787] [2021-11-13 18:45:49,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:49,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:45:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:45:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-13 18:45:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:49,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:49,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131797787] [2021-11-13 18:45:49,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131797787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:45:49,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:45:49,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:45:49,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885843393] [2021-11-13 18:45:49,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:45:49,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:45:49,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:49,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:45:49,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:45:49,559 INFO L87 Difference]: Start difference. First operand 104 states and 113 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) [2021-11-13 18:45:49,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:49,895 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-11-13 18:45:49,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:45:49,896 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 [2021-11-13 18:45:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:49,897 INFO L225 Difference]: With dead ends: 121 [2021-11-13 18:45:49,897 INFO L226 Difference]: Without dead ends: 118 [2021-11-13 18:45:49,897 INFO L932 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 [2021-11-13 18:45:49,898 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 70 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 168.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.13ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 222.94ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:49,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 343 Invalid, 258 Unknown, 0 Unchecked, 6.13ms Time], IncrementalHoareTripleChecker [15 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 222.94ms Time] [2021-11-13 18:45:49,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-13 18:45:49,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 104. [2021-11-13 18:45:49,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.6166666666666667) internal successors, (97), 90 states have internal predecessors, (97), 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) [2021-11-13 18:45:49,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2021-11-13 18:45:49,909 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 26 [2021-11-13 18:45:49,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:49,909 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2021-11-13 18:45:49,910 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) [2021-11-13 18:45:49,910 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2021-11-13 18:45:49,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-13 18:45:49,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:49,911 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:49,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:45:49,912 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_createErr4REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:45:49,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:49,912 INFO L85 PathProgramCache]: Analyzing trace with hash -931067113, now seen corresponding path program 1 times [2021-11-13 18:45:49,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:49,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895650381] [2021-11-13 18:45:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:49,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:50,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:45:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:50,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:45:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:50,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 18:45:50,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:50,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:50,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895650381] [2021-11-13 18:45:50,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895650381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:50,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343290170] [2021-11-13 18:45:50,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:50,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:50,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:50,126 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:50,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:45:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:50,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 18:45:50,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:50,514 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-13 18:45:50,515 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 [2021-11-13 18:45:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:50,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:51,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343290170] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:51,074 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:51,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2021-11-13 18:45:51,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215943831] [2021-11-13 18:45:51,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:51,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 18:45:51,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:51,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 18:45:51,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:45:51,077 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand has 21 states, 20 states have (on average 2.85) internal successors, (57), 14 states have internal predecessors, (57), 2 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:45:51,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:51,562 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2021-11-13 18:45:51,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:45:51,563 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 14 states have internal predecessors, (57), 2 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-11-13 18:45:51,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:51,565 INFO L225 Difference]: With dead ends: 118 [2021-11-13 18:45:51,565 INFO L226 Difference]: Without dead ends: 118 [2021-11-13 18:45:51,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:45:51,566 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 67 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 302.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.37ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 385.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:51,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 474 Invalid, 640 Unknown, 0 Unchecked, 7.37ms Time], IncrementalHoareTripleChecker [16 Valid, 569 Invalid, 0 Unknown, 55 Unchecked, 385.65ms Time] [2021-11-13 18:45:51,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-13 18:45:51,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2021-11-13 18:45:51,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.6) internal successors, (96), 89 states have internal predecessors, (96), 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) [2021-11-13 18:45:51,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2021-11-13 18:45:51,575 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 38 [2021-11-13 18:45:51,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:51,576 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2021-11-13 18:45:51,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.85) internal successors, (57), 14 states have internal predecessors, (57), 2 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:45:51,576 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2021-11-13 18:45:51,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-13 18:45:51,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:51,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:51,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:51,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 18:45:51,805 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting dll_createErr5REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:45:51,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:51,806 INFO L85 PathProgramCache]: Analyzing trace with hash -931067112, now seen corresponding path program 1 times [2021-11-13 18:45:51,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:51,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590486806] [2021-11-13 18:45:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:51,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:51,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:45:51,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:51,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-13 18:45:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:51,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 18:45:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:52,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:52,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590486806] [2021-11-13 18:45:52,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590486806] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:52,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928867604] [2021-11-13 18:45:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:52,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:52,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:52,075 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:52,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:45:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:52,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-13 18:45:52,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:52,271 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 [2021-11-13 18:45:52,568 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-13 18:45:52,568 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 [2021-11-13 18:45:52,640 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:52,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:52,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928867604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:52,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:45:52,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-13 18:45:52,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140683376] [2021-11-13 18:45:52,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:52,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:45:52,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:52,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:45:52,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:45:52,769 INFO L87 Difference]: Start difference. First operand 103 states and 111 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) [2021-11-13 18:45:53,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:53,643 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2021-11-13 18:45:53,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:45:53,643 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 [2021-11-13 18:45:53,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:53,645 INFO L225 Difference]: With dead ends: 121 [2021-11-13 18:45:53,645 INFO L226 Difference]: Without dead ends: 121 [2021-11-13 18:45:53,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-11-13 18:45:53,647 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 122 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 580.71ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.54ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 680.21ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:53,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 495 Invalid, 868 Unknown, 0 Unchecked, 11.54ms Time], IncrementalHoareTripleChecker [25 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 680.21ms Time] [2021-11-13 18:45:53,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-13 18:45:53,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 102. [2021-11-13 18:45:53,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 60 states have (on average 1.5833333333333333) internal successors, (95), 88 states have internal predecessors, (95), 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) [2021-11-13 18:45:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-11-13 18:45:53,662 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 38 [2021-11-13 18:45:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:53,663 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-11-13 18:45:53,664 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) [2021-11-13 18:45:53,664 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-11-13 18:45:53,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 18:45:53,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:53,669 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:53,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:53,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:53,898 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_appendErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:45:53,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:53,898 INFO L85 PathProgramCache]: Analyzing trace with hash -520588973, now seen corresponding path program 1 times [2021-11-13 18:45:53,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:53,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680556851] [2021-11-13 18:45:53,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:53,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:53,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:45:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:53,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:45:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:45:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-11-13 18:45:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:45:54,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:54,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680556851] [2021-11-13 18:45:54,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680556851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:54,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191138038] [2021-11-13 18:45:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:54,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:54,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:54,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:54,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:45:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:54,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:45:54,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:54,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:45:54,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:45:54,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191138038] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:54,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:54,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2021-11-13 18:45:54,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132047686] [2021-11-13 18:45:54,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:54,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:45:54,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:54,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:45:54,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:45:54,540 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 12 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-13 18:45:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:54,852 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2021-11-13 18:45:54,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:45:54,853 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 41 [2021-11-13 18:45:54,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:54,854 INFO L225 Difference]: With dead ends: 127 [2021-11-13 18:45:54,854 INFO L226 Difference]: Without dead ends: 124 [2021-11-13 18:45:54,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:45:54,855 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 94 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 202.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.66ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 241.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:54,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 404 Invalid, 294 Unknown, 0 Unchecked, 5.66ms Time], IncrementalHoareTripleChecker [22 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 241.41ms Time] [2021-11-13 18:45:54,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-13 18:45:54,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 104. [2021-11-13 18:45:54,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 62 states have (on average 1.564516129032258) internal successors, (97), 90 states have internal predecessors, (97), 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) [2021-11-13 18:45:54,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2021-11-13 18:45:54,870 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 41 [2021-11-13 18:45:54,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:54,870 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2021-11-13 18:45:54,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 7 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-13 18:45:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2021-11-13 18:45:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 18:45:54,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:54,875 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:54,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:55,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:55,101 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_appendErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:45:55,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:55,102 INFO L85 PathProgramCache]: Analyzing trace with hash -2040197428, now seen corresponding path program 2 times [2021-11-13 18:45:55,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:55,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635380879] [2021-11-13 18:45:55,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:55,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:45:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:45:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:45:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:45:55,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:45:55,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:45:55,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:55,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635380879] [2021-11-13 18:45:55,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635380879] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:55,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571377198] [2021-11-13 18:45:55,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:45:55,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:55,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:55,297 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:55,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:45:55,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:45:55,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:45:55,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:45:55,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:45:55,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:45:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:45:55,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571377198] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:45:55,870 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:45:55,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 9 [2021-11-13 18:45:55,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264313050] [2021-11-13 18:45:55,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:45:55,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:45:55,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:45:55,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:45:55,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:45:55,872 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 18:45:56,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:45:56,221 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2021-11-13 18:45:56,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:45:56,221 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 56 [2021-11-13 18:45:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:45:56,223 INFO L225 Difference]: With dead ends: 117 [2021-11-13 18:45:56,223 INFO L226 Difference]: Without dead ends: 117 [2021-11-13 18:45:56,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:45:56,224 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 46 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 231.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.21ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 278.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:45:56,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 473 Invalid, 357 Unknown, 0 Unchecked, 6.21ms Time], IncrementalHoareTripleChecker [13 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 278.04ms Time] [2021-11-13 18:45:56,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-13 18:45:56,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 104. [2021-11-13 18:45:56,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 62 states have (on average 1.5483870967741935) internal successors, (96), 90 states have internal predecessors, (96), 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) [2021-11-13 18:45:56,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2021-11-13 18:45:56,231 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 56 [2021-11-13 18:45:56,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:45:56,232 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2021-11-13 18:45:56,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 6 states have internal predecessors, (48), 3 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 18:45:56,232 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2021-11-13 18:45:56,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 18:45:56,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:45:56,234 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:45:56,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:45:56,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:56,457 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting dll_appendErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:45:56,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:45:56,458 INFO L85 PathProgramCache]: Analyzing trace with hash 222608882, now seen corresponding path program 1 times [2021-11-13 18:45:56,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:45:56,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512574797] [2021-11-13 18:45:56,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:56,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:45:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:56,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:45:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:56,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:45:56,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:56,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:45:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:56,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:45:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:57,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:45:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:45:57,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:45:57,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512574797] [2021-11-13 18:45:57,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512574797] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:45:57,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989595329] [2021-11-13 18:45:57,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:45:57,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:45:57,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:45:57,124 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:45:57,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:45:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:45:57,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-13 18:45:57,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:45:57,311 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 [2021-11-13 18:45:57,331 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 [2021-11-13 18:45:57,970 INFO L354 Elim1Store]: treesize reduction 50, result has 9.1 percent of original size [2021-11-13 18:45:57,970 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 [2021-11-13 18:45:58,251 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-13 18:45:58,251 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 [2021-11-13 18:45:58,313 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:45:58,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:00,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989595329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:00,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:00,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2021-11-13 18:46:00,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587298069] [2021-11-13 18:46:00,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:00,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 18:46:00,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:00,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 18:46:00,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=698, Unknown=1, NotChecked=0, Total=812 [2021-11-13 18:46:00,726 INFO L87 Difference]: Start difference. First operand 104 states and 111 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) [2021-11-13 18:46:02,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:02,062 INFO L93 Difference]: Finished difference Result 167 states and 180 transitions. [2021-11-13 18:46:02,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 18:46:02,063 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 [2021-11-13 18:46:02,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:02,065 INFO L225 Difference]: With dead ends: 167 [2021-11-13 18:46:02,066 INFO L226 Difference]: Without dead ends: 167 [2021-11-13 18:46:02,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=223, Invalid=1336, Unknown=1, NotChecked=0, Total=1560 [2021-11-13 18:46:02,068 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 178 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 589.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.48ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 693.79ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:02,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 804 Invalid, 1111 Unknown, 0 Unchecked, 11.48ms Time], IncrementalHoareTripleChecker [46 Valid, 732 Invalid, 0 Unknown, 333 Unchecked, 693.79ms Time] [2021-11-13 18:46:02,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-11-13 18:46:02,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 141. [2021-11-13 18:46:02,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 93 states have (on average 1.5053763440860215) internal successors, (140), 122 states have internal predecessors, (140), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 18:46:02,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 164 transitions. [2021-11-13 18:46:02,077 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 164 transitions. Word has length 57 [2021-11-13 18:46:02,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:02,078 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 164 transitions. [2021-11-13 18:46:02,078 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) [2021-11-13 18:46:02,079 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 164 transitions. [2021-11-13 18:46:02,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 18:46:02,080 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:02,080 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:02,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:02,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:02,306 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting dll_appendErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:46:02,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:02,306 INFO L85 PathProgramCache]: Analyzing trace with hash 222608883, now seen corresponding path program 1 times [2021-11-13 18:46:02,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:02,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860853095] [2021-11-13 18:46:02,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:02,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:02,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:46:02,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:02,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:46:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:02,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:02,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:02,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:46:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:02,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:46:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:46:02,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:02,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860853095] [2021-11-13 18:46:02,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860853095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:02,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475545681] [2021-11-13 18:46:02,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:02,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:02,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:02,958 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:02,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:46:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:03,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:46:03,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:03,144 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 [2021-11-13 18:46:03,180 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 [2021-11-13 18:46:03,794 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-13 18:46:03,795 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 [2021-11-13 18:46:04,065 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-13 18:46:04,066 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 [2021-11-13 18:46:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:46:04,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:04,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475545681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:04,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:04,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2021-11-13 18:46:04,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811838595] [2021-11-13 18:46:04,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:04,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-13 18:46:04,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-13 18:46:04,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:46:04,255 INFO L87 Difference]: Start difference. First operand 141 states and 164 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) [2021-11-13 18:46:04,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:04,822 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2021-11-13 18:46:04,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:46:04,822 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 [2021-11-13 18:46:04,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:04,824 INFO L225 Difference]: With dead ends: 165 [2021-11-13 18:46:04,824 INFO L226 Difference]: Without dead ends: 165 [2021-11-13 18:46:04,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2021-11-13 18:46:04,825 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 141 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 428.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.94ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 504.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:04,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 766 Invalid, 955 Unknown, 0 Unchecked, 7.94ms Time], IncrementalHoareTripleChecker [25 Valid, 567 Invalid, 0 Unknown, 363 Unchecked, 504.48ms Time] [2021-11-13 18:46:04,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-13 18:46:04,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 141. [2021-11-13 18:46:04,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 93 states have (on average 1.4946236559139785) internal successors, (139), 122 states have internal predecessors, (139), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 18:46:04,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 163 transitions. [2021-11-13 18:46:04,832 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 163 transitions. Word has length 57 [2021-11-13 18:46:04,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:04,833 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 163 transitions. [2021-11-13 18:46:04,833 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) [2021-11-13 18:46:04,833 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 163 transitions. [2021-11-13 18:46:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-13 18:46:04,834 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:04,834 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:04,869 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-13 18:46:05,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-13 18:46:05,035 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting dll_appendErr4REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:46:05,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:05,036 INFO L85 PathProgramCache]: Analyzing trace with hash -821228525, now seen corresponding path program 1 times [2021-11-13 18:46:05,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:05,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525658790] [2021-11-13 18:46:05,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:05,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:46:05,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:46:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:46:05,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:46:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,180 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 18:46:05,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:05,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525658790] [2021-11-13 18:46:05,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525658790] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:05,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:05,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:46:05,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874592484] [2021-11-13 18:46:05,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:05,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:46:05,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:05,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:46:05,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:46:05,184 INFO L87 Difference]: Start difference. First operand 141 states and 163 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:46:05,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:05,441 INFO L93 Difference]: Finished difference Result 152 states and 175 transitions. [2021-11-13 18:46:05,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:46:05,442 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2021-11-13 18:46:05,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:05,444 INFO L225 Difference]: With dead ends: 152 [2021-11-13 18:46:05,444 INFO L226 Difference]: Without dead ends: 152 [2021-11-13 18:46:05,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:46:05,445 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 54 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 187.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.36ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 224.66ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:05,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 152 Invalid, 220 Unknown, 0 Unchecked, 2.36ms Time], IncrementalHoareTripleChecker [12 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 224.66ms Time] [2021-11-13 18:46:05,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-13 18:46:05,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 139. [2021-11-13 18:46:05,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 93 states have (on average 1.4731182795698925) internal successors, (137), 120 states have internal predecessors, (137), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 18:46:05,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2021-11-13 18:46:05,456 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 59 [2021-11-13 18:46:05,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:05,456 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2021-11-13 18:46:05,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:46:05,457 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2021-11-13 18:46:05,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-13 18:46:05,459 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:05,460 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:05,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:46:05,460 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting dll_appendErr5REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:46:05,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:05,461 INFO L85 PathProgramCache]: Analyzing trace with hash -821228524, now seen corresponding path program 1 times [2021-11-13 18:46:05,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:05,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858582109] [2021-11-13 18:46:05,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:05,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:05,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:46:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:46:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:05,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:46:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:46:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 18:46:05,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:05,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858582109] [2021-11-13 18:46:05,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858582109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:05,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:05,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:46:05,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93309155] [2021-11-13 18:46:05,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:05,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:46:05,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:05,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:46:05,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:05,606 INFO L87 Difference]: Start difference. First operand 139 states and 161 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-13 18:46:05,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:05,966 INFO L93 Difference]: Finished difference Result 150 states and 171 transitions. [2021-11-13 18:46:05,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:46:05,966 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2021-11-13 18:46:05,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:05,968 INFO L225 Difference]: With dead ends: 150 [2021-11-13 18:46:05,968 INFO L226 Difference]: Without dead ends: 150 [2021-11-13 18:46:05,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:46:05,969 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 102 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 218.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.34ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 259.71ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:05,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 277 Invalid, 307 Unknown, 0 Unchecked, 3.34ms Time], IncrementalHoareTripleChecker [13 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 259.71ms Time] [2021-11-13 18:46:05,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-13 18:46:05,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2021-11-13 18:46:05,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 93 states have (on average 1.4301075268817205) internal successors, (133), 118 states have internal predecessors, (133), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 18:46:05,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-11-13 18:46:05,979 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 59 [2021-11-13 18:46:05,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:05,980 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-11-13 18:46:05,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-13 18:46:05,980 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-11-13 18:46:05,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 18:46:05,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:05,981 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:05,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:46:05,982 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting dll_appendErr6REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:46:05,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:05,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1073370744, now seen corresponding path program 1 times [2021-11-13 18:46:05,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:05,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4081779] [2021-11-13 18:46:05,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:05,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:06,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:06,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:46:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:06,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:46:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:06,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:06,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:46:06,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:06,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:46:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 18:46:06,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:06,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4081779] [2021-11-13 18:46:06,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4081779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:06,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009373852] [2021-11-13 18:46:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:06,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:06,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:06,595 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:06,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:46:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:06,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-13 18:46:06,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:07,043 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 [2021-11-13 18:46:13,667 INFO L354 Elim1Store]: treesize reduction 187, result has 12.2 percent of original size [2021-11-13 18:46:13,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 47 [2021-11-13 18:46:13,700 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-13 18:46:13,701 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 [2021-11-13 18:46:13,968 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-13 18:46:13,968 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 [2021-11-13 18:46:14,160 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:46:14,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:46:14,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009373852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:14,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:46:14,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [20] total 33 [2021-11-13 18:46:14,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186481641] [2021-11-13 18:46:14,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:14,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:46:14,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:14,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:46:14,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1021, Unknown=3, NotChecked=0, Total=1122 [2021-11-13 18:46:14,163 INFO L87 Difference]: Start difference. First operand 137 states and 157 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) [2021-11-13 18:46:15,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:15,072 INFO L93 Difference]: Finished difference Result 152 states and 175 transitions. [2021-11-13 18:46:15,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 18:46:15,073 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 [2021-11-13 18:46:15,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:15,075 INFO L225 Difference]: With dead ends: 152 [2021-11-13 18:46:15,075 INFO L226 Difference]: Without dead ends: 152 [2021-11-13 18:46:15,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=124, Invalid=1279, Unknown=3, NotChecked=0, Total=1406 [2021-11-13 18:46:15,077 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 47 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 684.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.87ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 258 IncrementalHoareTripleChecker+Unchecked, 772.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:15,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 635 Invalid, 915 Unknown, 0 Unchecked, 5.87ms Time], IncrementalHoareTripleChecker [10 Valid, 647 Invalid, 0 Unknown, 258 Unchecked, 772.99ms Time] [2021-11-13 18:46:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-13 18:46:15,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 139. [2021-11-13 18:46:15,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 95 states have (on average 1.4421052631578948) internal successors, (137), 120 states have internal predecessors, (137), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 18:46:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2021-11-13 18:46:15,086 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 61 [2021-11-13 18:46:15,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:15,087 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2021-11-13 18:46:15,087 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) [2021-11-13 18:46:15,087 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2021-11-13 18:46:15,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 18:46:15,088 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:15,088 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:15,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:46:15,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 18:46:15,309 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting dll_appendErr7REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:46:15,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:15,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1073370745, now seen corresponding path program 1 times [2021-11-13 18:46:15,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:15,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378539391] [2021-11-13 18:46:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:15,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:15,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:46:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:15,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:46:15,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:15,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:15,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:46:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:15,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:46:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:16,722 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:46:16,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:16,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378539391] [2021-11-13 18:46:16,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378539391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:16,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257003805] [2021-11-13 18:46:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:16,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:16,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:16,723 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:16,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:46:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:16,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-13 18:46:16,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:16,967 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 [2021-11-13 18:46:17,939 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 [2021-11-13 18:46:17,945 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 [2021-11-13 18:46:20,372 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int)) (let ((.cse0 (+ node_create_~temp~0.offset 4)) (.cse1 (+ node_create_~temp~0.offset 8))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base) .cse0 0) .cse1 0) node_create_~temp~0.offset (select (select |c_#memory_$Pointer$.offset| node_create_~temp~0.base) node_create_~temp~0.offset)))) (= (select |c_old(#valid)| node_create_~temp~0.base) 0) (< node_create_~temp~0.base |c_#StackHeapBarrier|) (= |c_#length| (store |c_old(#length)| node_create_~temp~0.base 12)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) .cse0 0) .cse1 0) node_create_~temp~0.offset (select (select |c_#memory_$Pointer$.base| node_create_~temp~0.base) node_create_~temp~0.offset))))))) is different from true [2021-11-13 18:46:20,589 INFO L354 Elim1Store]: treesize reduction 187, result has 12.2 percent of original size [2021-11-13 18:46:20,589 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 [2021-11-13 18:46:20,664 INFO L354 Elim1Store]: treesize reduction 187, result has 12.2 percent of original size [2021-11-13 18:46:20,664 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 [2021-11-13 18:46:20,682 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-13 18:46:20,682 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 [2021-11-13 18:46:20,704 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 18:46:20,705 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 [2021-11-13 18:46:21,118 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-13 18:46:21,118 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 [2021-11-13 18:46:21,127 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-13 18:46:21,128 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 [2021-11-13 18:46:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 23 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2021-11-13 18:46:21,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:46:25,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257003805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:25,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:46:25,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 40 [2021-11-13 18:46:25,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366465250] [2021-11-13 18:46:25,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:25,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-13 18:46:25,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:25,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-13 18:46:25,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1760, Unknown=2, NotChecked=84, Total=1980 [2021-11-13 18:46:25,625 INFO L87 Difference]: Start difference. First operand 139 states and 161 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) [2021-11-13 18:46:38,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:38,144 INFO L93 Difference]: Finished difference Result 152 states and 173 transitions. [2021-11-13 18:46:38,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 18:46:38,145 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 [2021-11-13 18:46:38,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:38,147 INFO L225 Difference]: With dead ends: 152 [2021-11-13 18:46:38,147 INFO L226 Difference]: Without dead ends: 152 [2021-11-13 18:46:38,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=214, Invalid=2647, Unknown=5, NotChecked=104, Total=2970 [2021-11-13 18:46:38,149 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 115 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1117 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2353.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 1338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.77ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 2564.17ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:38,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 703 Invalid, 1338 Unknown, 0 Unchecked, 14.77ms Time], IncrementalHoareTripleChecker [31 Valid, 1117 Invalid, 0 Unknown, 190 Unchecked, 2564.17ms Time] [2021-11-13 18:46:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-13 18:46:38,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 139. [2021-11-13 18:46:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 95 states have (on average 1.4210526315789473) internal successors, (135), 120 states have internal predecessors, (135), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 18:46:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 159 transitions. [2021-11-13 18:46:38,161 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 159 transitions. Word has length 61 [2021-11-13 18:46:38,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:38,161 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 159 transitions. [2021-11-13 18:46:38,162 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) [2021-11-13 18:46:38,162 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 159 transitions. [2021-11-13 18:46:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 18:46:38,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:38,163 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:38,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-13 18:46:38,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 18:46:38,374 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:46:38,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:38,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1089981654, now seen corresponding path program 1 times [2021-11-13 18:46:38,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:38,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490458617] [2021-11-13 18:46:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:38,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:38,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:46:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:38,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:46:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:38,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:38,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:46:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:38,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:46:38,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:38,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:46:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 18:46:38,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:38,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490458617] [2021-11-13 18:46:38,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490458617] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:38,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:38,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:46:38,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190457266] [2021-11-13 18:46:38,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:38,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:46:38,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:38,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:46:38,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:38,787 INFO L87 Difference]: Start difference. First operand 139 states and 159 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:39,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:39,831 INFO L93 Difference]: Finished difference Result 152 states and 173 transitions. [2021-11-13 18:46:39,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:39,831 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2021-11-13 18:46:39,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:39,833 INFO L225 Difference]: With dead ends: 152 [2021-11-13 18:46:39,833 INFO L226 Difference]: Without dead ends: 152 [2021-11-13 18:46:39,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:46:39,835 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 76 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 804.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.24ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 864.84ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:39,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 231 Invalid, 356 Unknown, 0 Unchecked, 4.24ms Time], IncrementalHoareTripleChecker [13 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 864.84ms Time] [2021-11-13 18:46:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-13 18:46:39,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 138. [2021-11-13 18:46:39,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 95 states have (on average 1.4105263157894736) internal successors, (134), 119 states have internal predecessors, (134), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 18:46:39,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 158 transitions. [2021-11-13 18:46:39,843 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 158 transitions. Word has length 62 [2021-11-13 18:46:39,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:39,843 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 158 transitions. [2021-11-13 18:46:39,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 5 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:46:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 158 transitions. [2021-11-13 18:46:39,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 18:46:39,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:39,845 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:39,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 18:46:39,845 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr1REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:46:39,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:39,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1089981653, now seen corresponding path program 1 times [2021-11-13 18:46:39,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:39,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216062390] [2021-11-13 18:46:39,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:39,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:40,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:46:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:40,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:46:40,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:40,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:40,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:46:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:40,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:46:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:40,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:46:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:40,278 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 18:46:40,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:40,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216062390] [2021-11-13 18:46:40,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216062390] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:40,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:40,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:46:40,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526486485] [2021-11-13 18:46:40,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:40,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:46:40,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:40,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:46:40,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:46:40,281 INFO L87 Difference]: Start difference. First operand 138 states and 158 transitions. Second operand has 9 states, 8 states have (on average 3.75) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-13 18:46:41,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:41,368 INFO L93 Difference]: Finished difference Result 149 states and 170 transitions. [2021-11-13 18:46:41,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:46:41,369 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 62 [2021-11-13 18:46:41,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:41,371 INFO L225 Difference]: With dead ends: 149 [2021-11-13 18:46:41,371 INFO L226 Difference]: Without dead ends: 149 [2021-11-13 18:46:41,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:46:41,372 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 74 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 850.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.55ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 915.71ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:41,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 271 Invalid, 377 Unknown, 0 Unchecked, 4.55ms Time], IncrementalHoareTripleChecker [13 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 915.71ms Time] [2021-11-13 18:46:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-13 18:46:41,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 136. [2021-11-13 18:46:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 95 states have (on average 1.3894736842105264) internal successors, (132), 117 states have internal predecessors, (132), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 18:46:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2021-11-13 18:46:41,380 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 62 [2021-11-13 18:46:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:41,380 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2021-11-13 18:46:41,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.75) internal successors, (30), 6 states have internal predecessors, (30), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-13 18:46:41,381 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2021-11-13 18:46:41,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 18:46:41,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:41,382 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:41,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 18:46:41,383 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting dll_appendErr10REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:46:41,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:41,383 INFO L85 PathProgramCache]: Analyzing trace with hash 717135074, now seen corresponding path program 1 times [2021-11-13 18:46:41,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:41,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302756290] [2021-11-13 18:46:41,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:41,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:41,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:46:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:41,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:46:41,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:41,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:41,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:46:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:41,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:46:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 18:46:41,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:41,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302756290] [2021-11-13 18:46:41,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302756290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:41,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:41,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:46:41,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616858903] [2021-11-13 18:46:41,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:41,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:46:41,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:41,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:46:41,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:46:41,589 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:46:42,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:42,265 INFO L93 Difference]: Finished difference Result 151 states and 170 transitions. [2021-11-13 18:46:42,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:46:42,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2021-11-13 18:46:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:42,267 INFO L225 Difference]: With dead ends: 151 [2021-11-13 18:46:42,267 INFO L226 Difference]: Without dead ends: 151 [2021-11-13 18:46:42,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:46:42,268 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 41 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 542.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.97ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 585.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:42,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 159 Invalid, 206 Unknown, 0 Unchecked, 2.97ms Time], IncrementalHoareTripleChecker [12 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 585.86ms Time] [2021-11-13 18:46:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-13 18:46:42,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 134. [2021-11-13 18:46:42,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 95 states have (on average 1.3473684210526315) internal successors, (128), 115 states have internal predecessors, (128), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 18:46:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 152 transitions. [2021-11-13 18:46:42,277 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 152 transitions. Word has length 63 [2021-11-13 18:46:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:42,277 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 152 transitions. [2021-11-13 18:46:42,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:46:42,278 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 152 transitions. [2021-11-13 18:46:42,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 18:46:42,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:42,279 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:42,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 18:46:42,280 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting dll_appendErr11REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:46:42,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:42,280 INFO L85 PathProgramCache]: Analyzing trace with hash 717135075, now seen corresponding path program 1 times [2021-11-13 18:46:42,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:42,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278850659] [2021-11-13 18:46:42,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:42,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:42,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:46:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:42,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:46:42,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:42,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:42,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:42,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:46:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:42,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:46:42,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-13 18:46:42,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:42,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278850659] [2021-11-13 18:46:42,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278850659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:42,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:42,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:46:42,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135082412] [2021-11-13 18:46:42,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:42,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:46:42,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:42,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:46:42,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:46:42,509 INFO L87 Difference]: Start difference. First operand 134 states and 152 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:46:43,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:43,240 INFO L93 Difference]: Finished difference Result 149 states and 166 transitions. [2021-11-13 18:46:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:46:43,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2021-11-13 18:46:43,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:43,242 INFO L225 Difference]: With dead ends: 149 [2021-11-13 18:46:43,242 INFO L226 Difference]: Without dead ends: 149 [2021-11-13 18:46:43,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:46:43,244 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 39 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 584.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.99ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 631.17ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:43,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 161 Invalid, 198 Unknown, 0 Unchecked, 2.99ms Time], IncrementalHoareTripleChecker [12 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 631.17ms Time] [2021-11-13 18:46:43,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-13 18:46:43,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 132. [2021-11-13 18:46:43,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 95 states have (on average 1.305263157894737) internal successors, (124), 113 states have internal predecessors, (124), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 18:46:43,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 148 transitions. [2021-11-13 18:46:43,252 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 148 transitions. Word has length 63 [2021-11-13 18:46:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:43,253 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 148 transitions. [2021-11-13 18:46:43,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:46:43,253 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 148 transitions. [2021-11-13 18:46:43,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 18:46:43,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:43,254 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:43,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-13 18:46:43,255 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting dll_appendErr13REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:46:43,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:43,255 INFO L85 PathProgramCache]: Analyzing trace with hash 756350863, now seen corresponding path program 1 times [2021-11-13 18:46:43,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:43,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111742461] [2021-11-13 18:46:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:43,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:43,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:46:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:43,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:46:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:43,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:43,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:46:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:43,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:46:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 18:46:43,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:43,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111742461] [2021-11-13 18:46:43,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111742461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:43,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:43,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:46:43,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324420846] [2021-11-13 18:46:43,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:43,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:46:43,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:43,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:46:43,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:46:43,702 INFO L87 Difference]: Start difference. First operand 132 states and 148 transitions. Second operand has 9 states, 8 states have (on average 5.0) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:46:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:44,761 INFO L93 Difference]: Finished difference Result 144 states and 160 transitions. [2021-11-13 18:46:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:44,761 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 [2021-11-13 18:46:44,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:44,762 INFO L225 Difference]: With dead ends: 144 [2021-11-13 18:46:44,763 INFO L226 Difference]: Without dead ends: 144 [2021-11-13 18:46:44,763 INFO L932 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 [2021-11-13 18:46:44,764 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 50 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 873.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.68ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 938.53ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:44,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 296 Invalid, 387 Unknown, 0 Unchecked, 4.68ms Time], IncrementalHoareTripleChecker [12 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 938.53ms Time] [2021-11-13 18:46:44,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-13 18:46:44,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 131. [2021-11-13 18:46:44,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 95 states have (on average 1.2842105263157895) internal successors, (122), 112 states have internal predecessors, (122), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 18:46:44,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 146 transitions. [2021-11-13 18:46:44,772 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 146 transitions. Word has length 64 [2021-11-13 18:46:44,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:44,772 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 146 transitions. [2021-11-13 18:46:44,773 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) [2021-11-13 18:46:44,773 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 146 transitions. [2021-11-13 18:46:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 18:46:44,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:44,774 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:44,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-13 18:46:44,775 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting dll_appendErr12REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:46:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:44,775 INFO L85 PathProgramCache]: Analyzing trace with hash 756350862, now seen corresponding path program 1 times [2021-11-13 18:46:44,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:44,776 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26033464] [2021-11-13 18:46:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:44,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:44,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:46:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:44,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:46:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:44,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:44,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:44,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:46:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:45,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:46:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:45,085 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 18:46:45,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:45,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26033464] [2021-11-13 18:46:45,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26033464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:46:45,086 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:46:45,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:46:45,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732702654] [2021-11-13 18:46:45,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:46:45,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:46:45,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:45,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:46:45,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:46:45,088 INFO L87 Difference]: Start difference. First operand 131 states and 146 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) [2021-11-13 18:46:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:46:46,054 INFO L93 Difference]: Finished difference Result 143 states and 158 transitions. [2021-11-13 18:46:46,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:46:46,057 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 [2021-11-13 18:46:46,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:46:46,058 INFO L225 Difference]: With dead ends: 143 [2021-11-13 18:46:46,058 INFO L226 Difference]: Without dead ends: 143 [2021-11-13 18:46:46,058 INFO L932 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 [2021-11-13 18:46:46,059 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 46 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 774.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.20ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 832.96ms IncrementalHoareTripleChecker+Time [2021-11-13 18:46:46,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 234 Invalid, 359 Unknown, 0 Unchecked, 4.20ms Time], IncrementalHoareTripleChecker [12 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 832.96ms Time] [2021-11-13 18:46:46,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-13 18:46:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 130. [2021-11-13 18:46:46,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 95 states have (on average 1.263157894736842) internal successors, (120), 111 states have internal predecessors, (120), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 18:46:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2021-11-13 18:46:46,067 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 64 [2021-11-13 18:46:46,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:46:46,067 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2021-11-13 18:46:46,068 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) [2021-11-13 18:46:46,068 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2021-11-13 18:46:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 18:46:46,069 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:46:46,069 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:46:46,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-13 18:46:46,070 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting dll_appendErr6REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:46:46,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:46:46,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1972092910, now seen corresponding path program 1 times [2021-11-13 18:46:46,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:46:46,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260599253] [2021-11-13 18:46:46,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:46,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:46:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:46,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:46:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:46,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:46:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:48,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:46:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:48,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:46:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:48,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:46:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:46:50,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:46:50,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260599253] [2021-11-13 18:46:50,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260599253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:46:50,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140229299] [2021-11-13 18:46:50,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:46:50,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:46:50,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:46:50,462 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:46:50,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:46:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:46:50,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-13 18:46:50,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:46:51,185 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:46:51,185 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 [2021-11-13 18:46:51,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-13 18:46:51,762 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-13 18:46:51,763 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 [2021-11-13 18:46:52,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [dll_create_~head~0.offset] [2021-11-13 18:46:52,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:46:52,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-11-13 18:46:52,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968889180] [2021-11-13 18:46:52,020 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:46:52,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-13 18:46:52,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:46:52,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-13 18:46:52,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-11-13 18:46:52,022 INFO L87 Difference]: Start difference. First operand 130 states and 144 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) [2021-11-13 18:46:58,257 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:47:09,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:09,982 INFO L93 Difference]: Finished difference Result 158 states and 176 transitions. [2021-11-13 18:47:09,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-13 18:47:09,982 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 [2021-11-13 18:47:09,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:09,984 INFO L225 Difference]: With dead ends: 158 [2021-11-13 18:47:09,984 INFO L226 Difference]: Without dead ends: 158 [2021-11-13 18:47:09,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=295, Invalid=3365, Unknown=0, NotChecked=0, Total=3660 [2021-11-13 18:47:09,987 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 171 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6834.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.53ms SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7597.98ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:09,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 576 Invalid, 1593 Unknown, 0 Unchecked, 14.53ms Time], IncrementalHoareTripleChecker [66 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 7597.98ms Time] [2021-11-13 18:47:09,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-13 18:47:09,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 138. [2021-11-13 18:47:09,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 103 states have (on average 1.2815533980582525) internal successors, (132), 119 states have internal predecessors, (132), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 18:47:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 156 transitions. [2021-11-13 18:47:09,994 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 156 transitions. Word has length 65 [2021-11-13 18:47:09,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:09,995 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 156 transitions. [2021-11-13 18:47:09,995 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) [2021-11-13 18:47:09,995 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 156 transitions. [2021-11-13 18:47:09,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 18:47:09,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:09,996 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:10,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:47:10,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-13 18:47:10,206 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting dll_appendErr7REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:47:10,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:10,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1972092911, now seen corresponding path program 1 times [2021-11-13 18:47:10,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:10,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691136147] [2021-11-13 18:47:10,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:10,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:11,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:47:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:11,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:47:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:12,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:47:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:12,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:47:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:13,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:47:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:47:15,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:15,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691136147] [2021-11-13 18:47:15,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691136147] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:15,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125207318] [2021-11-13 18:47:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:15,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:15,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:15,614 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:15,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:47:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:15,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-13 18:47:15,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:17,436 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:47:17,437 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 [2021-11-13 18:47:17,988 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 [2021-11-13 18:47:18,002 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 [2021-11-13 18:47:18,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:18,270 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 [2021-11-13 18:47:18,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:47:18,280 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 [2021-11-13 18:47:20,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:47:20,437 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 [2021-11-13 18:47:20,447 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:47:20,448 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 44 treesize of output 32 [2021-11-13 18:47:54,568 INFO L354 Elim1Store]: treesize reduction 541, result has 8.8 percent of original size [2021-11-13 18:47:54,568 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 177 treesize of output 179 [2021-11-13 18:47:54,814 INFO L354 Elim1Store]: treesize reduction 397, result has 9.2 percent of original size [2021-11-13 18:47:54,814 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 170 treesize of output 130 [2021-11-13 18:47:54,867 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-13 18:47:54,867 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 166 treesize of output 168 [2021-11-13 18:47:54,919 INFO L354 Elim1Store]: treesize reduction 29, result has 23.7 percent of original size [2021-11-13 18:47:54,920 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 159 treesize of output 154 [2021-11-13 18:47:58,389 INFO L354 Elim1Store]: treesize reduction 188, result has 1.6 percent of original size [2021-11-13 18:47:58,390 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 185 treesize of output 104 [2021-11-13 18:47:58,443 INFO L354 Elim1Store]: treesize reduction 154, result has 1.9 percent of original size [2021-11-13 18:47:58,443 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 [2021-11-13 18:47:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:59,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:48:05,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125207318] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:05,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:48:05,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2021-11-13 18:48:05,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964313541] [2021-11-13 18:48:05,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:48:05,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-13 18:48:05,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:05,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-13 18:48:05,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=4449, Unknown=15, NotChecked=0, Total=4692 [2021-11-13 18:48:05,860 INFO L87 Difference]: Start difference. First operand 138 states and 156 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) [2021-11-13 18:48:36,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:36,145 INFO L93 Difference]: Finished difference Result 151 states and 168 transitions. [2021-11-13 18:48:36,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 18:48:36,146 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 [2021-11-13 18:48:36,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:36,148 INFO L225 Difference]: With dead ends: 151 [2021-11-13 18:48:36,148 INFO L226 Difference]: Without dead ends: 151 [2021-11-13 18:48:36,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1779 ImplicationChecksByTransitivity, 74.5s TimeCoverageRelationStatistics Valid=396, Invalid=6720, Unknown=24, NotChecked=0, Total=7140 [2021-11-13 18:48:36,152 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 134 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3926.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 1691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.69ms SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 4227.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:36,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 909 Invalid, 1691 Unknown, 0 Unchecked, 17.69ms Time], IncrementalHoareTripleChecker [52 Valid, 1456 Invalid, 0 Unknown, 183 Unchecked, 4227.58ms Time] [2021-11-13 18:48:36,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-13 18:48:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 138. [2021-11-13 18:48:36,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 103 states have (on average 1.2621359223300972) internal successors, (130), 119 states have internal predecessors, (130), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 18:48:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 154 transitions. [2021-11-13 18:48:36,161 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 154 transitions. Word has length 65 [2021-11-13 18:48:36,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:36,161 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 154 transitions. [2021-11-13 18:48:36,162 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) [2021-11-13 18:48:36,162 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 154 transitions. [2021-11-13 18:48:36,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 18:48:36,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:36,163 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:36,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:36,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:36,378 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:48:36,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:36,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1690615832, now seen corresponding path program 1 times [2021-11-13 18:48:36,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:36,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023537733] [2021-11-13 18:48:36,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:36,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:36,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:36,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:48:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:36,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:48:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:36,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:48:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:36,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:48:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:36,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:48:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 18:48:37,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:37,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023537733] [2021-11-13 18:48:37,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023537733] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:37,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:37,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-13 18:48:37,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228956870] [2021-11-13 18:48:37,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:37,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:48:37,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:37,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:48:37,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:48:37,142 INFO L87 Difference]: Start difference. First operand 138 states and 154 transitions. Second operand has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 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) [2021-11-13 18:48:39,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:39,464 INFO L93 Difference]: Finished difference Result 181 states and 204 transitions. [2021-11-13 18:48:39,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:48:39,465 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 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 65 [2021-11-13 18:48:39,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:39,467 INFO L225 Difference]: With dead ends: 181 [2021-11-13 18:48:39,467 INFO L226 Difference]: Without dead ends: 181 [2021-11-13 18:48:39,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:48:39,468 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 110 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1795.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.06ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1919.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:39,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 322 Invalid, 664 Unknown, 0 Unchecked, 7.06ms Time], IncrementalHoareTripleChecker [22 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 1919.76ms Time] [2021-11-13 18:48:39,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-13 18:48:39,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 145. [2021-11-13 18:48:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 109 states have (on average 1.2568807339449541) internal successors, (137), 125 states have internal predecessors, (137), 12 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-13 18:48:39,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 163 transitions. [2021-11-13 18:48:39,487 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 163 transitions. Word has length 65 [2021-11-13 18:48:39,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:39,488 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 163 transitions. [2021-11-13 18:48:39,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 9 states have internal predecessors, (38), 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) [2021-11-13 18:48:39,488 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 163 transitions. [2021-11-13 18:48:39,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 18:48:39,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:39,489 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:39,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-13 18:48:39,490 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr3REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:48:39,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:39,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1690615831, now seen corresponding path program 1 times [2021-11-13 18:48:39,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:39,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240242907] [2021-11-13 18:48:39,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:39,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:48:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:48:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:48:39,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:48:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:40,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:48:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 18:48:40,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:40,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240242907] [2021-11-13 18:48:40,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240242907] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:40,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:40,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-13 18:48:40,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472788081] [2021-11-13 18:48:40,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:40,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:48:40,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:40,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:48:40,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:48:40,472 INFO L87 Difference]: Start difference. First operand 145 states and 163 transitions. Second operand has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 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) [2021-11-13 18:48:42,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:42,784 INFO L93 Difference]: Finished difference Result 183 states and 207 transitions. [2021-11-13 18:48:42,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:48:42,785 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 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 65 [2021-11-13 18:48:42,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:42,787 INFO L225 Difference]: With dead ends: 183 [2021-11-13 18:48:42,787 INFO L226 Difference]: Without dead ends: 183 [2021-11-13 18:48:42,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:48:42,788 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 106 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1701.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.91ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1816.76ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:42,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 348 Invalid, 661 Unknown, 0 Unchecked, 6.91ms Time], IncrementalHoareTripleChecker [21 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 1816.76ms Time] [2021-11-13 18:48:42,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-11-13 18:48:42,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 147. [2021-11-13 18:48:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 111 states have (on average 1.2522522522522523) internal successors, (139), 127 states have internal predecessors, (139), 12 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-13 18:48:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 165 transitions. [2021-11-13 18:48:42,797 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 165 transitions. Word has length 65 [2021-11-13 18:48:42,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:42,797 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 165 transitions. [2021-11-13 18:48:42,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 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) [2021-11-13 18:48:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 165 transitions. [2021-11-13 18:48:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 18:48:42,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:42,800 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:42,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-13 18:48:42,801 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr8ASSERT_VIOLATIONMEMORY_LEAK === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:48:42,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:42,801 INFO L85 PathProgramCache]: Analyzing trace with hash -869484520, now seen corresponding path program 1 times [2021-11-13 18:48:42,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:42,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065055806] [2021-11-13 18:48:42,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:42,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:42,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:48:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:48:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:48:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:48:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:48:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 18:48:43,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:43,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065055806] [2021-11-13 18:48:43,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065055806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:43,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:43,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-13 18:48:43,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216562429] [2021-11-13 18:48:43,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:43,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:48:43,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:43,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:48:43,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:48:43,515 INFO L87 Difference]: Start difference. First operand 147 states and 165 transitions. Second operand has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 9 states have internal predecessors, (41), 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) [2021-11-13 18:48:45,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:45,258 INFO L93 Difference]: Finished difference Result 177 states and 198 transitions. [2021-11-13 18:48:45,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:48:45,259 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 9 states have internal predecessors, (41), 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 66 [2021-11-13 18:48:45,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:45,260 INFO L225 Difference]: With dead ends: 177 [2021-11-13 18:48:45,260 INFO L226 Difference]: Without dead ends: 177 [2021-11-13 18:48:45,261 INFO L932 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 [2021-11-13 18:48:45,261 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 81 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1272.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.47ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1375.87ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:45,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 499 Invalid, 538 Unknown, 0 Unchecked, 5.47ms Time], IncrementalHoareTripleChecker [13 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 1375.87ms Time] [2021-11-13 18:48:45,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-11-13 18:48:45,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 147. [2021-11-13 18:48:45,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 127 states have internal predecessors, (138), 12 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-13 18:48:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 164 transitions. [2021-11-13 18:48:45,270 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 164 transitions. Word has length 66 [2021-11-13 18:48:45,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:45,270 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 164 transitions. [2021-11-13 18:48:45,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 9 states have internal predecessors, (41), 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) [2021-11-13 18:48:45,270 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 164 transitions. [2021-11-13 18:48:45,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:48:45,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:45,272 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:45,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-13 18:48:45,272 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr8ASSERT_VIOLATIONMEMORY_LEAK === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:48:45,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:45,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1184173573, now seen corresponding path program 1 times [2021-11-13 18:48:45,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:45,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678711775] [2021-11-13 18:48:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:45,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:48:45,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:48:45,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:48:45,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:45,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:48:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:46,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:48:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:48:47,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:47,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678711775] [2021-11-13 18:48:47,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678711775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:47,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497432318] [2021-11-13 18:48:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:47,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:47,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:47,057 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:47,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:48:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:47,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-13 18:48:47,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:47,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 18:48:48,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 18:48:48,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-13 18:48:48,752 INFO L354 Elim1Store]: treesize reduction 29, result has 44.2 percent of original size [2021-11-13 18:48:48,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 34 [2021-11-13 18:48:49,208 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 42 treesize of output 30 [2021-11-13 18:48:49,215 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 27 treesize of output 19 [2021-11-13 18:48:49,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-13 18:48:49,718 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 18:48:49,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:48:49,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497432318] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:49,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:48:49,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [21] total 33 [2021-11-13 18:48:49,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442535873] [2021-11-13 18:48:49,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:49,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:48:49,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:49,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:48:49,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=982, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:48:49,721 INFO L87 Difference]: Start difference. First operand 147 states and 164 transitions. Second operand has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-13 18:48:52,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:52,061 INFO L93 Difference]: Finished difference Result 162 states and 181 transitions. [2021-11-13 18:48:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:48:52,062 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 67 [2021-11-13 18:48:52,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:52,064 INFO L225 Difference]: With dead ends: 162 [2021-11-13 18:48:52,064 INFO L226 Difference]: Without dead ends: 162 [2021-11-13 18:48:52,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2021-11-13 18:48:52,066 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 76 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1193.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.08ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1281.56ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:52,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 727 Invalid, 484 Unknown, 0 Unchecked, 5.08ms Time], IncrementalHoareTripleChecker [10 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 1281.56ms Time] [2021-11-13 18:48:52,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-13 18:48:52,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 147. [2021-11-13 18:48:52,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 111 states have (on average 1.2342342342342343) internal successors, (137), 127 states have internal predecessors, (137), 12 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-13 18:48:52,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2021-11-13 18:48:52,074 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 67 [2021-11-13 18:48:52,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:52,074 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2021-11-13 18:48:52,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-13 18:48:52,075 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2021-11-13 18:48:52,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:48:52,076 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:52,076 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:48:52,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:52,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:52,282 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting dll_appendErr6REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:48:52,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:52,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1220509284, now seen corresponding path program 2 times [2021-11-13 18:48:52,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:52,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88084344] [2021-11-13 18:48:52,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:52,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:53,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:48:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:53,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:48:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:48:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:55,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:48:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:56,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:48:56,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:48:58,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:58,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88084344] [2021-11-13 18:48:58,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88084344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:58,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814086790] [2021-11-13 18:48:58,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:48:58,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:58,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:58,838 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:58,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:48:58,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:48:58,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:48:58,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 141 conjunts are in the unsatisfiable core [2021-11-13 18:48:58,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:59,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:48:59,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 18:49:01,360 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:49:01,361 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 [2021-11-13 18:49:01,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-13 18:49:01,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-13 18:49:01,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-11-13 18:49:02,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-11-13 18:49:02,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:49:02,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:49:02,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-11-13 18:49:02,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:49:02,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:49:02,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2021-11-13 18:49:02,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:49:02,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:49:02,829 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 18:49:02,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 83 [2021-11-13 18:49:02,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:49:02,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:49:02,871 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-13 18:49:02,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 106 [2021-11-13 18:49:05,724 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 18:49:05,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 146 treesize of output 68 [2021-11-13 18:49:05,739 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-13 18:49:05,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 53 treesize of output 33 [2021-11-13 18:49:08,664 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int)) (let ((.cse0 (+ node_create_~temp~0.offset 4)) (.cse1 (+ node_create_~temp~0.offset 8))) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base) .cse0 0) .cse1 0) node_create_~temp~0.offset (select (select |c_#memory_$Pointer$.offset| node_create_~temp~0.base) node_create_~temp~0.offset)))) (= (select |c_old(#valid)| node_create_~temp~0.base) 0) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) .cse0 0) .cse1 0) node_create_~temp~0.offset (select (select |c_#memory_$Pointer$.base| node_create_~temp~0.base) node_create_~temp~0.offset))))))) is different from true [2021-11-13 18:49:09,192 INFO L354 Elim1Store]: treesize reduction 623, result has 8.0 percent of original size [2021-11-13 18:49:09,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 203 treesize of output 153 [2021-11-13 18:49:09,564 INFO L354 Elim1Store]: treesize reduction 935, result has 7.7 percent of original size [2021-11-13 18:49:09,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 17 case distinctions, treesize of input 196 treesize of output 204 [2021-11-13 18:49:09,628 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-13 18:49:09,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 189 treesize of output 191 [2021-11-13 18:49:14,506 INFO L354 Elim1Store]: treesize reduction 390, result has 1.8 percent of original size [2021-11-13 18:49:14,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 256 treesize of output 138 [2021-11-13 18:49:14,650 INFO L354 Elim1Store]: treesize reduction 334, result has 2.1 percent of original size [2021-11-13 18:49:14,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 11 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 61 [2021-11-13 18:49:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2021-11-13 18:49:14,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:22,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814086790] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:22,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:49:22,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38] total 65 [2021-11-13 18:49:22,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842777704] [2021-11-13 18:49:22,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:22,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-13 18:49:22,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:22,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-13 18:49:22,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4620, Unknown=3, NotChecked=136, Total=4970 [2021-11-13 18:49:22,704 INFO L87 Difference]: Start difference. First operand 147 states and 163 transitions. Second operand has 65 states, 59 states have (on average 1.728813559322034) internal successors, (102), 54 states have internal predecessors, (102), 9 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-13 18:49:38,113 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:49:45,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:45,539 INFO L93 Difference]: Finished difference Result 157 states and 171 transitions. [2021-11-13 18:49:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-13 18:49:45,539 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 59 states have (on average 1.728813559322034) internal successors, (102), 54 states have internal predecessors, (102), 9 states have call successors, (13), 6 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 69 [2021-11-13 18:49:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:45,541 INFO L225 Difference]: With dead ends: 157 [2021-11-13 18:49:45,541 INFO L226 Difference]: Without dead ends: 157 [2021-11-13 18:49:45,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=365, Invalid=7646, Unknown=3, NotChecked=176, Total=8190 [2021-11-13 18:49:45,545 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 114 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10037.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 2753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.03ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 10985.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:45,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 1399 Invalid, 2753 Unknown, 0 Unchecked, 24.03ms Time], IncrementalHoareTripleChecker [63 Valid, 2395 Invalid, 0 Unknown, 295 Unchecked, 10985.10ms Time] [2021-11-13 18:49:45,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-13 18:49:45,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 144. [2021-11-13 18:49:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 108 states have (on average 1.212962962962963) internal successors, (131), 124 states have internal predecessors, (131), 12 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-13 18:49:45,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 157 transitions. [2021-11-13 18:49:45,553 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 157 transitions. Word has length 69 [2021-11-13 18:49:45,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:45,554 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 157 transitions. [2021-11-13 18:49:45,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 59 states have (on average 1.728813559322034) internal successors, (102), 54 states have internal predecessors, (102), 9 states have call successors, (13), 6 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-13 18:49:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 157 transitions. [2021-11-13 18:49:45,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 18:49:45,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:45,580 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:45,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:45,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-13 18:49:45,789 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr2REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:49:45,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:45,790 INFO L85 PathProgramCache]: Analyzing trace with hash 482636739, now seen corresponding path program 1 times [2021-11-13 18:49:45,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:45,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155432062] [2021-11-13 18:49:45,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:45,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:46,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:46,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:49:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:46,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:46,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:49:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:46,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:49:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:48,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:49:48,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:48,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155432062] [2021-11-13 18:49:48,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155432062] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:48,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:48,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-11-13 18:49:48,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514108398] [2021-11-13 18:49:48,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:48,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-13 18:49:48,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:48,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-13 18:49:48,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=642, Unknown=0, NotChecked=0, Total=702 [2021-11-13 18:49:48,696 INFO L87 Difference]: Start difference. First operand 144 states and 157 transitions. Second operand has 27 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 21 states have internal predecessors, (56), 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) [2021-11-13 18:49:55,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:55,680 INFO L93 Difference]: Finished difference Result 192 states and 212 transitions. [2021-11-13 18:49:55,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-13 18:49:55,680 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 21 states have internal predecessors, (56), 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 70 [2021-11-13 18:49:55,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:55,682 INFO L225 Difference]: With dead ends: 192 [2021-11-13 18:49:55,682 INFO L226 Difference]: Without dead ends: 192 [2021-11-13 18:49:55,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=134, Invalid=1506, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 18:49:55,685 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 141 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 1831 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4706.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.90ms SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5027.96ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:55,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 642 Invalid, 1863 Unknown, 0 Unchecked, 13.90ms Time], IncrementalHoareTripleChecker [32 Valid, 1831 Invalid, 0 Unknown, 0 Unchecked, 5027.96ms Time] [2021-11-13 18:49:55,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-13 18:49:55,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 156. [2021-11-13 18:49:55,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 118 states have (on average 1.2118644067796611) internal successors, (143), 135 states have internal predecessors, (143), 12 states have call successors, (12), 8 states have call predecessors, (12), 12 states have return successors, (16), 12 states have call predecessors, (16), 11 states have call successors, (16) [2021-11-13 18:49:55,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 171 transitions. [2021-11-13 18:49:55,694 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 171 transitions. Word has length 70 [2021-11-13 18:49:55,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:55,695 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 171 transitions. [2021-11-13 18:49:55,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 21 states have internal predecessors, (56), 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) [2021-11-13 18:49:55,695 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 171 transitions. [2021-11-13 18:49:55,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-13 18:49:55,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:55,697 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:55,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-13 18:49:55,697 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr3REQUIRES_VIOLATION === [dll_destroyErr0REQUIRES_VIOLATION, dll_destroyErr1REQUIRES_VIOLATION, dll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, dll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 37 more)] === [2021-11-13 18:49:55,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:55,698 INFO L85 PathProgramCache]: Analyzing trace with hash 482636740, now seen corresponding path program 1 times [2021-11-13 18:49:55,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:55,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755998481] [2021-11-13 18:49:55,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:55,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:56,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:49:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:56,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:49:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:56,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:49:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:56,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:49:56,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:57,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:49:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:59,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:49:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:50:01,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:50:01,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755998481] [2021-11-13 18:50:01,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755998481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:50:01,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735566968] [2021-11-13 18:50:01,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:50:01,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:50:01,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:50:01,153 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:50:01,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e35f90cc-2680-4e83-9082-f076c097ca3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 18:50:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:50:01,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-13 18:50:01,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:50:03,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-11-13 18:50:03,379 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 [2021-11-13 18:50:51,086 WARN L860 $PredicateComparison]: unable to prove that (exists ((dll_append_~new_last~0.base Int) (v_DerPreprocessor_8 Int) (v_DerPreprocessor_7 Int) (dll_append_~last~0.offset Int) (node_create_~temp~0.offset Int) (dll_append_~new_last~0.offset Int)) (let ((.cse8 (+ node_create_~temp~0.offset 4)) (.cse9 (+ node_create_~temp~0.offset 8))) (let ((.cse5 (store |c_old(#memory_$Pointer$.base)| dll_append_~new_last~0.base (store (store (store (select |c_old(#memory_$Pointer$.base)| dll_append_~new_last~0.base) .cse8 0) .cse9 0) node_create_~temp~0.offset v_DerPreprocessor_7)))) (let ((.cse4 (select (select .cse5 |c_dll_append_#in~head.base|) |c_dll_append_#in~head.offset|))) (let ((.cse0 (select .cse5 .cse4)) (.cse3 (+ dll_append_~new_last~0.offset 8)) (.cse6 (store |c_old(#memory_$Pointer$.offset)| dll_append_~new_last~0.base (store (store (store (select |c_old(#memory_$Pointer$.offset)| dll_append_~new_last~0.base) .cse8 0) .cse9 0) node_create_~temp~0.offset v_DerPreprocessor_8))) (.cse1 (+ dll_append_~last~0.offset 4))) (and (= (select .cse0 .cse1) 0) (= |c_#memory_$Pointer$.base| (let ((.cse2 (store .cse5 .cse4 (store .cse0 .cse1 dll_append_~new_last~0.base)))) (store .cse2 dll_append_~new_last~0.base (store (select .cse2 dll_append_~new_last~0.base) .cse3 .cse4)))) (<= (select (select .cse6 |c_dll_append_#in~head.base|) |c_dll_append_#in~head.offset|) dll_append_~last~0.offset) (= |c_#memory_$Pointer$.offset| (let ((.cse7 (store .cse6 .cse4 (store (select .cse6 .cse4) .cse1 dll_append_~new_last~0.offset)))) (store .cse7 dll_append_~new_last~0.base (store (select .cse7 dll_append_~new_last~0.base) .cse3 dll_append_~last~0.offset)))) (< dll_append_~new_last~0.base |c_#StackHeapBarrier|) (<= (+ dll_append_~last~0.offset 8) (select |c_#length| .cse4)))))))) is different from true [2021-11-13 18:51:00,144 WARN L227 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 308 DAG size of output: 122 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 18:51:00,145 INFO L354 Elim1Store]: treesize reduction 2809, result has 14.8 percent of original size [2021-11-13 18:51:00,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 30 case distinctions, treesize of input 7895 treesize of output 6477 [2021-11-13 18:51:02,363 INFO L354 Elim1Store]: treesize reduction 2377, result has 17.8 percent of original size [2021-11-13 18:51:02,364 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 8766 treesize of output 6303