./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_update_all.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_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/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_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/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_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/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 e86102617f1813255879beda7bab492587801800e6506c4c5cd56fb9179f8713 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:00:53,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:00:53,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:00:53,458 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:00:53,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:00:53,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:00:53,463 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:00:53,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:00:53,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:00:53,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:00:53,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:00:53,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:00:53,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:00:53,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:00:53,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:00:53,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:00:53,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:00:53,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:00:53,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:00:53,511 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:00:53,513 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:00:53,515 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:00:53,516 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:00:53,517 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:00:53,521 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:00:53,522 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:00:53,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:00:53,527 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:00:53,529 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:00:53,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:00:53,532 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:00:53,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:00:53,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:00:53,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:00:53,539 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:00:53,539 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:00:53,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:00:53,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:00:53,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:00:53,542 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:00:53,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:00:53,544 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-13 18:00:53,599 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:00:53,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:00:53,602 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:00:53,603 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:00:53,611 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:00:53,611 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:00:53,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:00:53,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:00:53,612 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:00:53,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:00:53,614 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:00:53,614 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 18:00:53,614 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:00:53,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:00:53,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:00:53,615 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 18:00:53,615 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 18:00:53,616 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 18:00:53,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:00:53,616 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 18:00:53,616 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:00:53,616 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:00:53,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:00:53,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:00:53,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:00:53,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:00:53,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:00:53,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:00:53,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:00:53,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:00:53,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:00:53,620 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_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e86102617f1813255879beda7bab492587801800e6506c4c5cd56fb9179f8713 [2021-11-13 18:00:53,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:00:53,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:00:53,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:00:53,951 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:00:53,952 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:00:53,954 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/list-simple/sll2c_update_all.i [2021-11-13 18:00:54,048 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/data/f22492dfa/672ceab3e03f4d69afea3f9531092052/FLAGe5fab88ae [2021-11-13 18:00:54,697 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:00:54,703 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/sv-benchmarks/c/list-simple/sll2c_update_all.i [2021-11-13 18:00:54,733 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/data/f22492dfa/672ceab3e03f4d69afea3f9531092052/FLAGe5fab88ae [2021-11-13 18:00:54,908 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/data/f22492dfa/672ceab3e03f4d69afea3f9531092052 [2021-11-13 18:00:54,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:00:54,912 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-13 18:00:54,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:00:54,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:00:54,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:00:54,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:00:54" (1/1) ... [2021-11-13 18:00:54,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@396c6656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:54, skipping insertion in model container [2021-11-13 18:00:54,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:00:54" (1/1) ... [2021-11-13 18:00:54,930 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:00:54,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:00:55,354 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_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/sv-benchmarks/c/list-simple/sll2c_update_all.i[24418,24431] [2021-11-13 18:00:55,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:00:55,366 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:00:55,413 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_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/sv-benchmarks/c/list-simple/sll2c_update_all.i[24418,24431] [2021-11-13 18:00:55,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:00:55,467 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:00:55,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:55 WrapperNode [2021-11-13 18:00:55,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:00:55,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:00:55,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:00:55,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:00:55,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:55" (1/1) ... [2021-11-13 18:00:55,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:55" (1/1) ... [2021-11-13 18:00:55,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:55" (1/1) ... [2021-11-13 18:00:55,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:55" (1/1) ... [2021-11-13 18:00:55,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:55" (1/1) ... [2021-11-13 18:00:55,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:55" (1/1) ... [2021-11-13 18:00:55,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:55" (1/1) ... [2021-11-13 18:00:55,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:00:55,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:00:55,546 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:00:55,546 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:00:55,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:55" (1/1) ... [2021-11-13 18:00:55,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:00:55,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:00:55,593 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:00:55,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:00:55,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-13 18:00:55,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:00:55,636 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-13 18:00:55,636 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-13 18:00:55,636 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-13 18:00:55,637 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-13 18:00:55,637 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-13 18:00:55,637 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2021-11-13 18:00:55,637 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_destroy [2021-11-13 18:00:55,637 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_get_data_at [2021-11-13 18:00:55,638 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_update_at [2021-11-13 18:00:55,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-13 18:00:55,638 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-13 18:00:55,638 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-13 18:00:55,638 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-13 18:00:55,639 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-13 18:00:55,639 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-13 18:00:55,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:00:55,639 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-13 18:00:55,639 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-13 18:00:55,640 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-13 18:00:55,640 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-13 18:00:55,640 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-13 18:00:55,640 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-13 18:00:55,640 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-13 18:00:55,641 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-13 18:00:55,641 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-13 18:00:55,641 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-13 18:00:55,641 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-13 18:00:55,641 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-13 18:00:55,641 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-13 18:00:55,642 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-13 18:00:55,642 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-13 18:00:55,642 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-13 18:00:55,642 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-13 18:00:55,642 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-13 18:00:55,643 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-13 18:00:55,643 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-13 18:00:55,643 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-13 18:00:55,643 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-13 18:00:55,643 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-13 18:00:55,643 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-13 18:00:55,644 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-13 18:00:55,644 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-13 18:00:55,644 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-13 18:00:55,644 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-13 18:00:55,644 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-13 18:00:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-13 18:00:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-13 18:00:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-13 18:00:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-13 18:00:55,645 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-13 18:00:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-13 18:00:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-13 18:00:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-13 18:00:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-13 18:00:55,646 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-13 18:00:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-13 18:00:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-13 18:00:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-13 18:00:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-13 18:00:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-13 18:00:55,647 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-13 18:00:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-13 18:00:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-13 18:00:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-13 18:00:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-13 18:00:55,648 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-13 18:00:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-13 18:00:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-13 18:00:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-13 18:00:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-13 18:00:55,649 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-13 18:00:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-13 18:00:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-13 18:00:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-13 18:00:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-13 18:00:55,650 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-13 18:00:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-13 18:00:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-13 18:00:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-13 18:00:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-13 18:00:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-13 18:00:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-13 18:00:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-13 18:00:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-13 18:00:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-13 18:00:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-13 18:00:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-13 18:00:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-13 18:00:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-13 18:00:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-13 18:00:55,653 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-13 18:00:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-13 18:00:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-13 18:00:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-13 18:00:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-13 18:00:55,654 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-13 18:00:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-13 18:00:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-13 18:00:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-13 18:00:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-13 18:00:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-13 18:00:55,655 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-13 18:00:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-13 18:00:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-13 18:00:55,656 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-13 18:00:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-13 18:00:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-13 18:00:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-13 18:00:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-13 18:00:55,657 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-13 18:00:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-13 18:00:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-13 18:00:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-13 18:00:55,658 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-13 18:00:55,659 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-13 18:00:55,659 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-13 18:00:55,659 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-13 18:00:55,659 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-13 18:00:55,659 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-13 18:00:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-13 18:00:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-13 18:00:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-13 18:00:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:00:55,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:00:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:00:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2021-11-13 18:00:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_destroy [2021-11-13 18:00:55,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:00:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:00:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_get_data_at [2021-11-13 18:00:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:00:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_update_at [2021-11-13 18:00:55,662 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-13 18:00:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-13 18:00:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:00:55,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:00:56,018 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-13 18:00:56,293 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:00:56,294 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-13 18:00:56,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:00:56 BoogieIcfgContainer [2021-11-13 18:00:56,296 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:00:56,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:00:56,299 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:00:56,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:00:56,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:00:54" (1/3) ... [2021-11-13 18:00:56,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7067b6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:00:56, skipping insertion in model container [2021-11-13 18:00:56,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:00:55" (2/3) ... [2021-11-13 18:00:56,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7067b6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:00:56, skipping insertion in model container [2021-11-13 18:00:56,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:00:56" (3/3) ... [2021-11-13 18:00:56,312 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_update_all.i [2021-11-13 18:00:56,325 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:00:56,325 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-11-13 18:00:56,425 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:00:56,433 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 18:00:56,434 INFO L340 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2021-11-13 18:00:56,453 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 59 states have (on average 1.728813559322034) internal successors, (102), 87 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:00:56,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:00:56,466 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:56,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:56,467 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:00:56,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:56,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1445934727, now seen corresponding path program 1 times [2021-11-13 18:00:56,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:56,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925656859] [2021-11-13 18:00:56,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:56,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:56,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:00:56,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:56,800 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 18:00:56,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:56,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925656859] [2021-11-13 18:00:56,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925656859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:00:56,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:00:56,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:00:56,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286057144] [2021-11-13 18:00:56,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:00:56,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:00:56,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:56,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:00:56,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:00:56,880 INFO L87 Difference]: Start difference. First operand has 104 states, 59 states have (on average 1.728813559322034) internal successors, (102), 87 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 18:00:57,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:57,211 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-11-13 18:00:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:00:57,214 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 12 [2021-11-13 18:00:57,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:57,224 INFO L225 Difference]: With dead ends: 121 [2021-11-13 18:00:57,224 INFO L226 Difference]: Without dead ends: 115 [2021-11-13 18:00:57,226 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 18:00:57,230 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 58 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 220.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.03ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 267.97ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:57,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 116 Invalid, 171 Unknown, 0 Unchecked, 13.03ms Time], IncrementalHoareTripleChecker [9 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 267.97ms Time] [2021-11-13 18:00:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-13 18:00:57,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2021-11-13 18:00:57,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 56 states have (on average 1.5714285714285714) internal successors, (88), 81 states have internal predecessors, (88), 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 18:00:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2021-11-13 18:00:57,284 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 12 [2021-11-13 18:00:57,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:57,284 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2021-11-13 18:00:57,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 18:00:57,285 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2021-11-13 18:00:57,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 18:00:57,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:57,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:57,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:00:57,286 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:00:57,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:57,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1445934728, now seen corresponding path program 1 times [2021-11-13 18:00:57,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:57,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156710568] [2021-11-13 18:00:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:57,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:57,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:57,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:00:57,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:00:57,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:57,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156710568] [2021-11-13 18:00:57,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156710568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:00:57,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:00:57,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:00:57,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37126118] [2021-11-13 18:00:57,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:00:57,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:00:57,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:57,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:00:57,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:00:57,439 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 18:00:57,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:57,699 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2021-11-13 18:00:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:00:57,701 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 12 [2021-11-13 18:00:57,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:57,711 INFO L225 Difference]: With dead ends: 113 [2021-11-13 18:00:57,711 INFO L226 Difference]: Without dead ends: 113 [2021-11-13 18:00:57,716 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 18:00:57,719 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 53 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 189.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.65ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 228.07ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:57,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 107 Invalid, 158 Unknown, 0 Unchecked, 7.65ms Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 228.07ms Time] [2021-11-13 18:00:57,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-13 18:00:57,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 94. [2021-11-13 18:00:57,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 79 states have internal predecessors, (86), 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 18:00:57,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-11-13 18:00:57,748 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 12 [2021-11-13 18:00:57,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:57,750 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-11-13 18:00:57,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 18:00:57,750 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-11-13 18:00:57,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-13 18:00:57,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:57,752 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:57,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:00:57,753 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:00:57,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:57,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1652501893, now seen corresponding path program 1 times [2021-11-13 18:00:57,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:57,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067427311] [2021-11-13 18:00:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:57,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:57,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:00:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:57,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:00:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:57,960 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 18:00:57,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:57,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067427311] [2021-11-13 18:00:57,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067427311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:00:57,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:00:57,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:00:57,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535450651] [2021-11-13 18:00:57,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:00:57,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:00:57,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:57,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:00:57,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:00:57,964 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 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 18:00:58,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:58,478 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2021-11-13 18:00:58,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:00:58,481 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 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 19 [2021-11-13 18:00:58,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:58,487 INFO L225 Difference]: With dead ends: 120 [2021-11-13 18:00:58,488 INFO L226 Difference]: Without dead ends: 120 [2021-11-13 18:00:58,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:00:58,490 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 133 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 263.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.71ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 336.13ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:58,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 188 Invalid, 327 Unknown, 0 Unchecked, 10.71ms Time], IncrementalHoareTripleChecker [22 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 336.13ms Time] [2021-11-13 18:00:58,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-13 18:00:58,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2021-11-13 18:00:58,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 80 states have internal predecessors, (87), 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 18:00:58,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-11-13 18:00:58,515 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 19 [2021-11-13 18:00:58,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:58,516 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-11-13 18:00:58,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 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 18:00:58,516 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-11-13 18:00:58,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 18:00:58,518 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:58,518 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:58,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:00:58,520 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_circular_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:00:58,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:58,521 INFO L85 PathProgramCache]: Analyzing trace with hash 173693975, now seen corresponding path program 1 times [2021-11-13 18:00:58,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:58,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13966708] [2021-11-13 18:00:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:58,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:58,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:58,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:00:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:58,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:00:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:58,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:00:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:00:58,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:58,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13966708] [2021-11-13 18:00:58,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13966708] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:00:58,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:00:58,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:00:58,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776367436] [2021-11-13 18:00:58,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:00:58,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:00:58,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:58,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:00:58,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:00:58,788 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:00:59,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:59,216 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2021-11-13 18:00:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:00:59,217 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-13 18:00:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:59,218 INFO L225 Difference]: With dead ends: 114 [2021-11-13 18:00:59,218 INFO L226 Difference]: Without dead ends: 114 [2021-11-13 18:00:59,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 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 18:00:59,220 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 108 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 294.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.96ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 366.93ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:59,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 201 Invalid, 434 Unknown, 0 Unchecked, 7.96ms Time], IncrementalHoareTripleChecker [15 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 366.93ms Time] [2021-11-13 18:00:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-13 18:00:59,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2021-11-13 18:00:59,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 79 states have internal predecessors, (86), 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 18:00:59,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-11-13 18:00:59,235 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 28 [2021-11-13 18:00:59,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:59,236 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-11-13 18:00:59,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:00:59,236 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-11-13 18:00:59,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 18:00:59,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:59,238 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:00:59,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:00:59,238 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_circular_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:00:59,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:59,239 INFO L85 PathProgramCache]: Analyzing trace with hash 173693976, now seen corresponding path program 1 times [2021-11-13 18:00:59,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:59,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803755525] [2021-11-13 18:00:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:59,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:59,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:00:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:59,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:00:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:59,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:00:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:59,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:00:59,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:00:59,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803755525] [2021-11-13 18:00:59,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803755525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:00:59,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:00:59,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:00:59,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523827385] [2021-11-13 18:00:59,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:00:59,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:00:59,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:00:59,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:00:59,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:00:59,468 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:00:59,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:00:59,882 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2021-11-13 18:00:59,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:00:59,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-13 18:00:59,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:00:59,884 INFO L225 Difference]: With dead ends: 113 [2021-11-13 18:00:59,884 INFO L226 Difference]: Without dead ends: 113 [2021-11-13 18:00:59,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 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 18:00:59,886 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 106 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 288.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.97ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 341.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:00:59,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 205 Invalid, 423 Unknown, 0 Unchecked, 7.97ms Time], IncrementalHoareTripleChecker [14 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 341.28ms Time] [2021-11-13 18:00:59,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-13 18:00:59,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2021-11-13 18:00:59,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 78 states have internal predecessors, (85), 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 18:00:59,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2021-11-13 18:00:59,896 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 28 [2021-11-13 18:00:59,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:00:59,897 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2021-11-13 18:00:59,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:00:59,897 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2021-11-13 18:00:59,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 18:00:59,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:00:59,899 INFO L514 BasicCegarLoop]: trace histogram [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 18:00:59,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:00:59,899 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:00:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:00:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash -918257581, now seen corresponding path program 1 times [2021-11-13 18:00:59,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:00:59,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682340896] [2021-11-13 18:00:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:00:59,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:00:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:59,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:00:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:00:59,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:01:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:00,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:01:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:01:00,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:00,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682340896] [2021-11-13 18:01:00,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682340896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:00,123 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662458602] [2021-11-13 18:01:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:00,124 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:00,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:00,126 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:00,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:01:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:00,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:01:00,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:00,444 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 18:01:00,738 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 18:01:00,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-13 18:01:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:00,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:00,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662458602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:00,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:01:00,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-11-13 18:01:00,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334162478] [2021-11-13 18:01:00,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:00,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:01:00,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:00,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:01:00,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:01:00,982 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:01:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:01,514 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2021-11-13 18:01:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:01:01,515 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-11-13 18:01:01,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:01,516 INFO L225 Difference]: With dead ends: 113 [2021-11-13 18:01:01,516 INFO L226 Difference]: Without dead ends: 113 [2021-11-13 18:01:01,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:01:01,518 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 104 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 309.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.90ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 373.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:01,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 295 Invalid, 603 Unknown, 0 Unchecked, 8.90ms Time], IncrementalHoareTripleChecker [19 Valid, 443 Invalid, 0 Unknown, 141 Unchecked, 373.58ms Time] [2021-11-13 18:01:01,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-13 18:01:01,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2021-11-13 18:01:01,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.4736842105263157) internal successors, (84), 77 states have internal predecessors, (84), 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 18:01:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2021-11-13 18:01:01,548 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 31 [2021-11-13 18:01:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:01,549 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2021-11-13 18:01:01,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:01:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2021-11-13 18:01:01,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 18:01:01,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:01,552 INFO L514 BasicCegarLoop]: trace histogram [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 18:01:01,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:01,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:01,754 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting sll_circular_createErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:01,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:01,754 INFO L85 PathProgramCache]: Analyzing trace with hash -918257580, now seen corresponding path program 1 times [2021-11-13 18:01:01,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:01,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411699911] [2021-11-13 18:01:01,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:01,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:01,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:01,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:01:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:01,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 18:01:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:01:02,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:02,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411699911] [2021-11-13 18:01:02,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411699911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:02,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569250909] [2021-11-13 18:01:02,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:02,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:02,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:02,043 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:02,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:01:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:02,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 18:01:02,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:02,238 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 18:01:02,243 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 18:01:02,586 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-13 18:01:02,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-13 18:01:02,596 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:01:02,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-13 18:01:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:02,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:02,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569250909] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:02,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:01:02,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-11-13 18:01:02,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368701923] [2021-11-13 18:01:02,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:02,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:01:02,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:02,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:01:02,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:01:02,882 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-13 18:01:03,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:03,369 INFO L93 Difference]: Finished difference Result 118 states and 129 transitions. [2021-11-13 18:01:03,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:01:03,370 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 31 [2021-11-13 18:01:03,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:03,371 INFO L225 Difference]: With dead ends: 118 [2021-11-13 18:01:03,371 INFO L226 Difference]: Without dead ends: 118 [2021-11-13 18:01:03,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:01:03,373 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 115 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 316.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.38ms SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 388.63ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:03,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 337 Invalid, 710 Unknown, 0 Unchecked, 10.38ms Time], IncrementalHoareTripleChecker [19 Valid, 548 Invalid, 0 Unknown, 143 Unchecked, 388.63ms Time] [2021-11-13 18:01:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-13 18:01:03,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 91. [2021-11-13 18:01:03,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 57 states have (on average 1.456140350877193) internal successors, (83), 76 states have internal predecessors, (83), 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 18:01:03,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2021-11-13 18:01:03,389 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 31 [2021-11-13 18:01:03,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:03,390 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2021-11-13 18:01:03,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-13 18:01:03,390 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2021-11-13 18:01:03,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-13 18:01:03,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:03,392 INFO L514 BasicCegarLoop]: trace histogram [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 18:01:03,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:03,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 18:01:03,607 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:03,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:03,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1835388011, now seen corresponding path program 1 times [2021-11-13 18:01:03,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:03,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082389699] [2021-11-13 18:01:03,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:03,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:03,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:03,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:01:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:03,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:03,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:03,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:01:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:01:03,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:03,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082389699] [2021-11-13 18:01:03,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082389699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:01:03,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:01:03,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-13 18:01:03,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568107963] [2021-11-13 18:01:03,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:01:03,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:01:03,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:03,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:01:03,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:01:03,848 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:01:04,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:04,592 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2021-11-13 18:01:04,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:01:04,593 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-11-13 18:01:04,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:04,594 INFO L225 Difference]: With dead ends: 119 [2021-11-13 18:01:04,594 INFO L226 Difference]: Without dead ends: 119 [2021-11-13 18:01:04,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:01:04,596 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 149 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 471.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.04ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 564.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:04,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 291 Invalid, 894 Unknown, 0 Unchecked, 12.04ms Time], IncrementalHoareTripleChecker [22 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 564.90ms Time] [2021-11-13 18:01:04,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-13 18:01:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2021-11-13 18:01:04,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 79 states have internal predecessors, (89), 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 18:01:04,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-11-13 18:01:04,603 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 40 [2021-11-13 18:01:04,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:04,603 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-11-13 18:01:04,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:01:04,604 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-11-13 18:01:04,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-13 18:01:04,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:04,605 INFO L514 BasicCegarLoop]: trace histogram [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 18:01:04,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:01:04,605 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_circular_update_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:04,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:04,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1835388012, now seen corresponding path program 1 times [2021-11-13 18:01:04,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:04,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016712732] [2021-11-13 18:01:04,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:04,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:04,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:04,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:04,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:04,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:01:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:04,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:04,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:04,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:01:04,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:01:04,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:04,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016712732] [2021-11-13 18:01:04,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016712732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:01:04,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:01:04,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-13 18:01:04,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303635348] [2021-11-13 18:01:04,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:01:04,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:01:04,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:04,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:01:04,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:01:04,915 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:01:05,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:05,778 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2021-11-13 18:01:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:01:05,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-11-13 18:01:05,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:05,781 INFO L225 Difference]: With dead ends: 117 [2021-11-13 18:01:05,781 INFO L226 Difference]: Without dead ends: 117 [2021-11-13 18:01:05,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:01:05,782 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 145 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 523.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.21ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 626.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:05,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 300 Invalid, 881 Unknown, 0 Unchecked, 10.21ms Time], IncrementalHoareTripleChecker [18 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 626.58ms Time] [2021-11-13 18:01:05,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-13 18:01:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 94. [2021-11-13 18:01:05,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 60 states have (on average 1.45) internal successors, (87), 79 states have internal predecessors, (87), 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 18:01:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2021-11-13 18:01:05,789 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 40 [2021-11-13 18:01:05,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:05,789 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2021-11-13 18:01:05,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:01:05,790 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2021-11-13 18:01:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 18:01:05,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:05,796 INFO L514 BasicCegarLoop]: trace histogram [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 18:01:05,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:01:05,796 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_circular_destroyErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:05,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:05,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1224058359, now seen corresponding path program 1 times [2021-11-13 18:01:05,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:05,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109914157] [2021-11-13 18:01:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:05,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:05,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:05,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:01:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:05,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:05,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:01:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:01:05,931 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:05,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109914157] [2021-11-13 18:01:05,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109914157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:01:05,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:01:05,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:01:05,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930944165] [2021-11-13 18:01:05,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:01:05,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:01:05,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:05,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:01:05,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:01:05,934 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:01:06,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:06,215 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2021-11-13 18:01:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:01:06,216 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2021-11-13 18:01:06,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:06,217 INFO L225 Difference]: With dead ends: 123 [2021-11-13 18:01:06,218 INFO L226 Difference]: Without dead ends: 123 [2021-11-13 18:01:06,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:01:06,219 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 121 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 188.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.23ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 228.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:06,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 123 Invalid, 214 Unknown, 0 Unchecked, 4.23ms Time], IncrementalHoareTripleChecker [23 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 228.04ms Time] [2021-11-13 18:01:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-13 18:01:06,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-11-13 18:01:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.435483870967742) internal successors, (89), 81 states have internal predecessors, (89), 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 18:01:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2021-11-13 18:01:06,225 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 42 [2021-11-13 18:01:06,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:06,225 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2021-11-13 18:01:06,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:01:06,226 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2021-11-13 18:01:06,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 18:01:06,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:06,230 INFO L514 BasicCegarLoop]: trace histogram [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 18:01:06,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:01:06,231 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:06,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:06,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1182712765, now seen corresponding path program 1 times [2021-11-13 18:01:06,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:06,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17144231] [2021-11-13 18:01:06,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:06,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:06,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:06,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:01:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:06,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:06,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:06,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:01:06,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:01:06,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:06,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17144231] [2021-11-13 18:01:06,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17144231] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:01:06,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:01:06,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:01:06,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316506010] [2021-11-13 18:01:06,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:01:06,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:01:06,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:06,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:01:06,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:01:06,346 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 4 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 18:01:06,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:06,717 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2021-11-13 18:01:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:01:06,718 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 4 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 43 [2021-11-13 18:01:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:06,719 INFO L225 Difference]: With dead ends: 128 [2021-11-13 18:01:06,719 INFO L226 Difference]: Without dead ends: 128 [2021-11-13 18:01:06,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:01:06,720 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 110 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 224.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.08ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 266.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:06,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 209 Invalid, 324 Unknown, 0 Unchecked, 5.08ms Time], IncrementalHoareTripleChecker [21 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 266.33ms Time] [2021-11-13 18:01:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-13 18:01:06,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2021-11-13 18:01:06,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 86 states have internal predecessors, (93), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:01:06,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-11-13 18:01:06,726 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 43 [2021-11-13 18:01:06,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:06,727 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-11-13 18:01:06,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 4 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 18:01:06,727 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-11-13 18:01:06,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 18:01:06,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:06,728 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-11-13 18:01:06,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:01:06,729 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:06,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:06,729 INFO L85 PathProgramCache]: Analyzing trace with hash 27146876, now seen corresponding path program 1 times [2021-11-13 18:01:06,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:06,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638350317] [2021-11-13 18:01:06,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:06,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:06,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:06,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:01:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:06,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:06,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:01:06,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:06,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:01:06,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:01:06,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:06,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638350317] [2021-11-13 18:01:06,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638350317] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:01:06,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:01:06,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-13 18:01:06,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099498266] [2021-11-13 18:01:06,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:01:06,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:01:06,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:06,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:01:06,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:01:06,970 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:01:07,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:07,650 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2021-11-13 18:01:07,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:01:07,651 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2021-11-13 18:01:07,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:07,652 INFO L225 Difference]: With dead ends: 130 [2021-11-13 18:01:07,652 INFO L226 Difference]: Without dead ends: 130 [2021-11-13 18:01:07,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:01:07,653 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 173 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 439.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.80ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 520.64ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:07,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 299 Invalid, 925 Unknown, 0 Unchecked, 8.80ms Time], IncrementalHoareTripleChecker [25 Valid, 900 Invalid, 0 Unknown, 0 Unchecked, 520.64ms Time] [2021-11-13 18:01:07,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-13 18:01:07,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2021-11-13 18:01:07,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 69 states have (on average 1.434782608695652) internal successors, (99), 89 states have internal predecessors, (99), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 18:01:07,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2021-11-13 18:01:07,659 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 50 [2021-11-13 18:01:07,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:07,659 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2021-11-13 18:01:07,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:01:07,660 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2021-11-13 18:01:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-13 18:01:07,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:07,661 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-11-13 18:01:07,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:01:07,662 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_circular_get_data_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:07,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:07,662 INFO L85 PathProgramCache]: Analyzing trace with hash 27146877, now seen corresponding path program 1 times [2021-11-13 18:01:07,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:07,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468902409] [2021-11-13 18:01:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:07,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:07,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:07,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:01:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:07,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:07,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:01:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:07,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:01:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:07,815 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 18:01:07,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:07,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468902409] [2021-11-13 18:01:07,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468902409] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:07,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549997273] [2021-11-13 18:01:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:07,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:07,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:07,823 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:07,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:01:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:07,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:01:07,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:08,101 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 18:01:08,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:08,260 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 18:01:08,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549997273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:08,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:08,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2021-11-13 18:01:08,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696237047] [2021-11-13 18:01:08,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:08,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:01:08,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:08,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:01:08,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:01:08,268 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 7 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-13 18:01:08,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:08,642 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2021-11-13 18:01:08,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:01:08,643 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 7 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 50 [2021-11-13 18:01:08,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:08,644 INFO L225 Difference]: With dead ends: 133 [2021-11-13 18:01:08,644 INFO L226 Difference]: Without dead ends: 133 [2021-11-13 18:01:08,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:01:08,646 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 141 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 253.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.35ms SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 319.57ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:08,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 214 Invalid, 431 Unknown, 0 Unchecked, 5.35ms Time], IncrementalHoareTripleChecker [41 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 319.57ms Time] [2021-11-13 18:01:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-13 18:01:08,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 112. [2021-11-13 18:01:08,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 94 states have internal predecessors, (106), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:01:08,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2021-11-13 18:01:08,652 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 50 [2021-11-13 18:01:08,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:08,653 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2021-11-13 18:01:08,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 10 states have internal predecessors, (45), 7 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-13 18:01:08,653 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2021-11-13 18:01:08,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 18:01:08,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:08,655 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-11-13 18:01:08,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:08,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:08,855 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:08,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:08,856 INFO L85 PathProgramCache]: Analyzing trace with hash 310228175, now seen corresponding path program 1 times [2021-11-13 18:01:08,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:08,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049587333] [2021-11-13 18:01:08,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:08,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:08,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:09,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:01:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:09,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:09,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:01:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:09,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:01:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:01:09,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:09,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049587333] [2021-11-13 18:01:09,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049587333] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:09,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735496471] [2021-11-13 18:01:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:09,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:09,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:09,479 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:09,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:01:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:09,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-13 18:01:09,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:09,659 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 18:01:09,871 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:01:09,871 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 18:01:09,923 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 11 treesize of output 7 [2021-11-13 18:01:10,005 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 18:01:10,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-11-13 18:01:10,333 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:01:10,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-11-13 18:01:25,193 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-11-13 18:01:25,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 39 [2021-11-13 18:01:25,826 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-13 18:01:25,827 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 28 [2021-11-13 18:01:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:01:25,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:27,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735496471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:27,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:01:27,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2021-11-13 18:01:27,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590588977] [2021-11-13 18:01:27,423 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:27,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-13 18:01:27,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:27,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-13 18:01:27,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1599, Unknown=18, NotChecked=0, Total=1722 [2021-11-13 18:01:27,425 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand has 38 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 27 states have internal predecessors, (61), 6 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-13 18:01:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:29,197 INFO L93 Difference]: Finished difference Result 164 states and 185 transitions. [2021-11-13 18:01:29,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-13 18:01:29,197 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 27 states have internal predecessors, (61), 6 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 51 [2021-11-13 18:01:29,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:29,199 INFO L225 Difference]: With dead ends: 164 [2021-11-13 18:01:29,199 INFO L226 Difference]: Without dead ends: 164 [2021-11-13 18:01:29,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=212, Invalid=3076, Unknown=18, NotChecked=0, Total=3306 [2021-11-13 18:01:29,202 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 248 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 759.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 2527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.51ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 868 IncrementalHoareTripleChecker+Unchecked, 900.51ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:29,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 842 Invalid, 2527 Unknown, 0 Unchecked, 13.51ms Time], IncrementalHoareTripleChecker [53 Valid, 1606 Invalid, 0 Unknown, 868 Unchecked, 900.51ms Time] [2021-11-13 18:01:29,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-13 18:01:29,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 139. [2021-11-13 18:01:29,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 97 states have (on average 1.3711340206185567) internal successors, (133), 116 states have internal predecessors, (133), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-11-13 18:01:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 159 transitions. [2021-11-13 18:01:29,210 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 159 transitions. Word has length 51 [2021-11-13 18:01:29,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:29,211 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 159 transitions. [2021-11-13 18:01:29,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 27 states have internal predecessors, (61), 6 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2021-11-13 18:01:29,211 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 159 transitions. [2021-11-13 18:01:29,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 18:01:29,212 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:29,212 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-11-13 18:01:29,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:29,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-13 18:01:29,423 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_circular_update_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:29,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:29,424 INFO L85 PathProgramCache]: Analyzing trace with hash 310228176, now seen corresponding path program 1 times [2021-11-13 18:01:29,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:29,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971446230] [2021-11-13 18:01:29,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:29,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:29,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:29,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:01:29,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:29,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:30,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:01:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:30,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:01:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:01:30,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:30,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971446230] [2021-11-13 18:01:30,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971446230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:30,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584789546] [2021-11-13 18:01:30,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:30,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:30,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:30,480 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:30,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:01:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:30,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-13 18:01:30,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:30,633 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 18:01:30,637 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 18:01:31,145 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:01:31,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 18:01:31,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-13 18:01:31,312 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 11 treesize of output 7 [2021-11-13 18:01:31,322 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 11 treesize of output 7 [2021-11-13 18:01:31,518 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 18:01:31,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-11-13 18:01:31,532 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-13 18:01:31,533 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 55 treesize of output 50 [2021-11-13 18:01:32,047 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:01:32,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 35 [2021-11-13 18:01:32,056 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:01:32,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-11-13 18:01:36,360 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-13 18:01:36,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 66 [2021-11-13 18:01:36,385 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-13 18:01:36,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 69 treesize of output 56 [2021-11-13 18:01:36,826 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:01:36,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-11-13 18:01:36,833 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:01:36,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 24 [2021-11-13 18:01:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:01:37,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:39,454 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_sll_circular_update_at_~head.offset_19 Int)) (or (and (forall ((v_DerPreprocessor_3 Int)) (<= 0 (+ (select (store (select |c_#memory_$Pointer$.offset| c_main_~s~0.base) (+ v_sll_circular_update_at_~head.offset_19 4) v_DerPreprocessor_3) c_main_~s~0.offset) 4))) (forall ((v_DerPreprocessor_3 Int) (v_DerPreprocessor_2 Int)) (let ((.cse0 (+ v_sll_circular_update_at_~head.offset_19 4))) (<= (+ (select (store (select |c_#memory_$Pointer$.offset| c_main_~s~0.base) .cse0 v_DerPreprocessor_3) c_main_~s~0.offset) 8) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| c_main_~s~0.base) .cse0 v_DerPreprocessor_2) c_main_~s~0.offset)))))) (< v_sll_circular_update_at_~head.offset_19 c_main_~s~0.offset))) is different from false [2021-11-13 18:01:39,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584789546] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:39,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:01:39,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 48 [2021-11-13 18:01:39,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720729183] [2021-11-13 18:01:39,457 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:39,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-13 18:01:39,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:39,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-13 18:01:39,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2706, Unknown=3, NotChecked=104, Total=2970 [2021-11-13 18:01:39,460 INFO L87 Difference]: Start difference. First operand 139 states and 159 transitions. Second operand has 49 states, 48 states have (on average 1.5625) internal successors, (75), 36 states have internal predecessors, (75), 6 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-13 18:01:41,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:41,289 INFO L93 Difference]: Finished difference Result 178 states and 208 transitions. [2021-11-13 18:01:41,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 18:01:41,289 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.5625) internal successors, (75), 36 states have internal predecessors, (75), 6 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) Word has length 51 [2021-11-13 18:01:41,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:41,292 INFO L225 Difference]: With dead ends: 178 [2021-11-13 18:01:41,292 INFO L226 Difference]: Without dead ends: 178 [2021-11-13 18:01:41,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=278, Invalid=4415, Unknown=3, NotChecked=134, Total=4830 [2021-11-13 18:01:41,295 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 133 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 1785 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 871.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.93ms SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 1029.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:41,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 943 Invalid, 2202 Unknown, 0 Unchecked, 10.93ms Time], IncrementalHoareTripleChecker [42 Valid, 1785 Invalid, 0 Unknown, 375 Unchecked, 1029.75ms Time] [2021-11-13 18:01:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-13 18:01:41,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 153. [2021-11-13 18:01:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 108 states have (on average 1.3611111111111112) internal successors, (147), 128 states have internal predecessors, (147), 14 states have call successors, (14), 11 states have call predecessors, (14), 11 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2021-11-13 18:01:41,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 178 transitions. [2021-11-13 18:01:41,305 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 178 transitions. Word has length 51 [2021-11-13 18:01:41,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:41,305 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 178 transitions. [2021-11-13 18:01:41,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.5625) internal successors, (75), 36 states have internal predecessors, (75), 6 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-13 18:01:41,306 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 178 transitions. [2021-11-13 18:01:41,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 18:01:41,307 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:41,307 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-11-13 18:01:41,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:41,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-13 18:01:41,523 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting sll_circular_update_atErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:41,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:41,523 INFO L85 PathProgramCache]: Analyzing trace with hash 310228231, now seen corresponding path program 1 times [2021-11-13 18:01:41,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:41,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299533057] [2021-11-13 18:01:41,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:41,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:41,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:41,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:41,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:01:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:41,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:41,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:01:41,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:41,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:01:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:41,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:01:41,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:41,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299533057] [2021-11-13 18:01:41,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299533057] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:41,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314226427] [2021-11-13 18:01:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:41,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:41,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:41,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:41,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:01:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:41,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:01:41,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:01:41,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:01:42,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314226427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:42,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:42,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 11 [2021-11-13 18:01:42,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616479413] [2021-11-13 18:01:42,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:42,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:01:42,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:42,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:01:42,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:01:42,051 INFO L87 Difference]: Start difference. First operand 153 states and 178 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 18:01:42,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:42,512 INFO L93 Difference]: Finished difference Result 198 states and 222 transitions. [2021-11-13 18:01:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:01:42,513 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2021-11-13 18:01:42,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:42,514 INFO L225 Difference]: With dead ends: 198 [2021-11-13 18:01:42,515 INFO L226 Difference]: Without dead ends: 198 [2021-11-13 18:01:42,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:01:42,516 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 207 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 232.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.38ms SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 282.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:42,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 237 Invalid, 445 Unknown, 0 Unchecked, 3.38ms Time], IncrementalHoareTripleChecker [56 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 282.26ms Time] [2021-11-13 18:01:42,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-13 18:01:42,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 167. [2021-11-13 18:01:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 118 states have (on average 1.3389830508474576) internal successors, (158), 141 states have internal predecessors, (158), 15 states have call successors, (15), 12 states have call predecessors, (15), 14 states have return successors, (19), 13 states have call predecessors, (19), 14 states have call successors, (19) [2021-11-13 18:01:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 192 transitions. [2021-11-13 18:01:42,526 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 192 transitions. Word has length 51 [2021-11-13 18:01:42,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:42,526 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 192 transitions. [2021-11-13 18:01:42,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 7 states have internal predecessors, (40), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 18:01:42,527 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 192 transitions. [2021-11-13 18:01:42,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 18:01:42,528 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:42,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:42,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-13 18:01:42,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 18:01:42,735 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting sll_circular_get_data_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:42,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:42,735 INFO L85 PathProgramCache]: Analyzing trace with hash 827280497, now seen corresponding path program 2 times [2021-11-13 18:01:42,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:42,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575833794] [2021-11-13 18:01:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:42,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:42,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:42,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:01:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:42,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:42,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:42,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:01:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:42,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:01:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:42,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:01:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 18:01:42,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:42,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575833794] [2021-11-13 18:01:42,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575833794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:42,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122375461] [2021-11-13 18:01:42,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:01:42,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:42,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:42,861 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:42,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 18:01:42,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-13 18:01:42,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:42,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-13 18:01:42,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:43,041 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 18:01:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 18:01:43,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:01:43,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122375461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:01:43,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:01:43,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 20 [2021-11-13 18:01:43,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701511067] [2021-11-13 18:01:43,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:01:43,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:01:43,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:43,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:01:43,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:01:43,512 INFO L87 Difference]: Start difference. First operand 167 states and 192 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:01:43,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:43,707 INFO L93 Difference]: Finished difference Result 198 states and 228 transitions. [2021-11-13 18:01:43,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:01:43,709 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2021-11-13 18:01:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:43,711 INFO L225 Difference]: With dead ends: 198 [2021-11-13 18:01:43,711 INFO L226 Difference]: Without dead ends: 198 [2021-11-13 18:01:43,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:01:43,712 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 72 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.84ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 111.83ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:43,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 374 Invalid, 180 Unknown, 0 Unchecked, 1.84ms Time], IncrementalHoareTripleChecker [1 Valid, 155 Invalid, 0 Unknown, 24 Unchecked, 111.83ms Time] [2021-11-13 18:01:43,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-13 18:01:43,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 189. [2021-11-13 18:01:43,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 136 states have (on average 1.3529411764705883) internal successors, (184), 160 states have internal predecessors, (184), 17 states have call successors, (17), 14 states have call predecessors, (17), 16 states have return successors, (22), 14 states have call predecessors, (22), 16 states have call successors, (22) [2021-11-13 18:01:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 223 transitions. [2021-11-13 18:01:43,729 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 223 transitions. Word has length 58 [2021-11-13 18:01:43,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:43,730 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 223 transitions. [2021-11-13 18:01:43,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:01:43,731 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 223 transitions. [2021-11-13 18:01:43,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-13 18:01:43,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:43,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1] [2021-11-13 18:01:43,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-13 18:01:43,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:43,955 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:43,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:43,955 INFO L85 PathProgramCache]: Analyzing trace with hash -655433381, now seen corresponding path program 2 times [2021-11-13 18:01:43,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:43,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396654031] [2021-11-13 18:01:43,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:43,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:44,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:44,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:01:44,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:44,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:44,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:44,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:01:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:44,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:01:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:44,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:01:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:01:44,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:44,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396654031] [2021-11-13 18:01:44,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396654031] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:44,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131030551] [2021-11-13 18:01:44,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:01:44,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:44,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:44,097 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:44,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 18:01:44,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:01:44,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:44,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:01:44,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:01:44,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:01:44,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131030551] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:01:44,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:01:44,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-11-13 18:01:44,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387529785] [2021-11-13 18:01:44,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:01:44,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:01:44,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:44,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:01:44,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:01:44,417 INFO L87 Difference]: Start difference. First operand 189 states and 223 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 18:01:44,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:44,472 INFO L93 Difference]: Finished difference Result 158 states and 174 transitions. [2021-11-13 18:01:44,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:01:44,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 59 [2021-11-13 18:01:44,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:44,474 INFO L225 Difference]: With dead ends: 158 [2021-11-13 18:01:44,474 INFO L226 Difference]: Without dead ends: 149 [2021-11-13 18:01:44,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:01:44,476 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 23 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.15ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:44,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 363 Invalid, 61 Unknown, 0 Unchecked, 1.15ms Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 40.04ms Time] [2021-11-13 18:01:44,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-13 18:01:44,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2021-11-13 18:01:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 102 states have (on average 1.3235294117647058) internal successors, (135), 122 states have internal predecessors, (135), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-11-13 18:01:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 163 transitions. [2021-11-13 18:01:44,487 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 163 transitions. Word has length 59 [2021-11-13 18:01:44,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:44,487 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 163 transitions. [2021-11-13 18:01:44,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 18:01:44,488 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 163 transitions. [2021-11-13 18:01:44,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 18:01:44,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:44,493 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:44,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:44,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-13 18:01:44,707 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting sll_circular_get_data_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:44,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:44,707 INFO L85 PathProgramCache]: Analyzing trace with hash -515246623, now seen corresponding path program 1 times [2021-11-13 18:01:44,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:44,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490124517] [2021-11-13 18:01:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:44,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:44,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:44,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:44,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:01:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:44,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:44,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:01:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:44,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:01:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:44,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:01:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-13 18:01:44,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:44,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490124517] [2021-11-13 18:01:44,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490124517] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:01:44,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:01:44,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-13 18:01:44,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562629499] [2021-11-13 18:01:44,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:01:44,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:01:44,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:44,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:01:44,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:01:44,993 INFO L87 Difference]: Start difference. First operand 146 states and 163 transitions. Second operand has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:01:45,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:45,662 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2021-11-13 18:01:45,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:01:45,662 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-11-13 18:01:45,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:45,664 INFO L225 Difference]: With dead ends: 169 [2021-11-13 18:01:45,664 INFO L226 Difference]: Without dead ends: 169 [2021-11-13 18:01:45,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:01:45,665 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 173 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 415.76ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.04ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 507.36ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:45,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 309 Invalid, 912 Unknown, 0 Unchecked, 5.04ms Time], IncrementalHoareTripleChecker [21 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 507.36ms Time] [2021-11-13 18:01:45,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-13 18:01:45,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 146. [2021-11-13 18:01:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 102 states have (on average 1.303921568627451) internal successors, (133), 122 states have internal predecessors, (133), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2021-11-13 18:01:45,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2021-11-13 18:01:45,673 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 61 [2021-11-13 18:01:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:45,674 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2021-11-13 18:01:45,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 9 states have internal predecessors, (41), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 18:01:45,674 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2021-11-13 18:01:45,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 18:01:45,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:45,675 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:45,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 18:01:45,676 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:45,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:45,676 INFO L85 PathProgramCache]: Analyzing trace with hash 675898859, now seen corresponding path program 3 times [2021-11-13 18:01:45,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:45,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538689937] [2021-11-13 18:01:45,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:45,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:45,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:45,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:01:45,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:45,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:45,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:01:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:45,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:01:45,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:45,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:01:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:01:45,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:45,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538689937] [2021-11-13 18:01:45,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538689937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:45,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019329965] [2021-11-13 18:01:45,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:01:45,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:45,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:45,819 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:45,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 18:01:46,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:01:46,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:46,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:01:46,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:01:46,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:01:46,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019329965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:46,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:46,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2021-11-13 18:01:46,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401046339] [2021-11-13 18:01:46,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:46,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:01:46,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:46,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:01:46,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:01:46,494 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 12 states have internal predecessors, (59), 6 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-13 18:01:47,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:47,155 INFO L93 Difference]: Finished difference Result 155 states and 165 transitions. [2021-11-13 18:01:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 18:01:47,155 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 12 states have internal predecessors, (59), 6 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) Word has length 62 [2021-11-13 18:01:47,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:47,156 INFO L225 Difference]: With dead ends: 155 [2021-11-13 18:01:47,156 INFO L226 Difference]: Without dead ends: 155 [2021-11-13 18:01:47,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:01:47,158 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 157 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 388.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.44ms SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 464.66ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:47,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 386 Invalid, 746 Unknown, 0 Unchecked, 5.44ms Time], IncrementalHoareTripleChecker [47 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 464.66ms Time] [2021-11-13 18:01:47,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-13 18:01:47,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 134. [2021-11-13 18:01:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 94 states have (on average 1.2553191489361701) internal successors, (118), 111 states have internal predecessors, (118), 13 states have call successors, (13), 10 states have call predecessors, (13), 9 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-11-13 18:01:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 144 transitions. [2021-11-13 18:01:47,164 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 144 transitions. Word has length 62 [2021-11-13 18:01:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:47,165 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 144 transitions. [2021-11-13 18:01:47,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 12 states have internal predecessors, (59), 6 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2021-11-13 18:01:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 144 transitions. [2021-11-13 18:01:47,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 18:01:47,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:47,166 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-13 18:01:47,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:47,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:47,367 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:47,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:47,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2095820899, now seen corresponding path program 4 times [2021-11-13 18:01:47,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:47,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719449946] [2021-11-13 18:01:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:47,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:47,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:47,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:47,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:01:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:47,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:47,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:01:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:47,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 18:01:47,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:47,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-13 18:01:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 18:01:47,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:47,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719449946] [2021-11-13 18:01:47,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719449946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:47,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601591701] [2021-11-13 18:01:47,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:01:47,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:47,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:47,542 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:47,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 18:01:47,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:01:47,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:01:47,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:01:47,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 18:01:47,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:48,081 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 18:01:48,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601591701] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:48,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:01:48,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9, 6] total 13 [2021-11-13 18:01:48,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481325770] [2021-11-13 18:01:48,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:01:48,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:01:48,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:48,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:01:48,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:01:48,084 INFO L87 Difference]: Start difference. First operand 134 states and 144 transitions. Second operand has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-13 18:01:48,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:48,115 INFO L93 Difference]: Finished difference Result 115 states and 123 transitions. [2021-11-13 18:01:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:01:48,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 63 [2021-11-13 18:01:48,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:48,119 INFO L225 Difference]: With dead ends: 115 [2021-11-13 18:01:48,119 INFO L226 Difference]: Without dead ends: 106 [2021-11-13 18:01:48,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:01:48,120 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 21 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.99ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.89ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:48,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 334 Invalid, 33 Unknown, 0 Unchecked, 0.89ms Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 24.77ms Time] [2021-11-13 18:01:48,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-13 18:01:48,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-11-13 18:01:48,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 73 states have (on average 1.273972602739726) internal successors, (93), 88 states have internal predecessors, (93), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:01:48,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 112 transitions. [2021-11-13 18:01:48,127 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 112 transitions. Word has length 63 [2021-11-13 18:01:48,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:48,128 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 112 transitions. [2021-11-13 18:01:48,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.2) internal successors, (36), 6 states have internal predecessors, (36), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-13 18:01:48,128 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 112 transitions. [2021-11-13 18:01:48,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 18:01:48,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:48,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:48,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:48,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-13 18:01:48,343 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:48,343 INFO L85 PathProgramCache]: Analyzing trace with hash 502725607, now seen corresponding path program 1 times [2021-11-13 18:01:48,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:48,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964854660] [2021-11-13 18:01:48,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:48,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:48,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:48,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:01:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:48,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:48,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:01:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:48,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:01:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:48,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:01:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:48,479 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 18:01:48,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:48,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964854660] [2021-11-13 18:01:48,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964854660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:01:48,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:01:48,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:01:48,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540447630] [2021-11-13 18:01:48,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:01:48,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:01:48,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:48,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:01:48,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:01:48,483 INFO L87 Difference]: Start difference. First operand 106 states and 112 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:01:48,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:48,844 INFO L93 Difference]: Finished difference Result 133 states and 138 transitions. [2021-11-13 18:01:48,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:01:48,847 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 64 [2021-11-13 18:01:48,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:48,849 INFO L225 Difference]: With dead ends: 133 [2021-11-13 18:01:48,849 INFO L226 Difference]: Without dead ends: 133 [2021-11-13 18:01:48,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:01:48,850 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 132 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 232.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.40ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 278.71ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:48,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 222 Invalid, 337 Unknown, 0 Unchecked, 3.40ms Time], IncrementalHoareTripleChecker [25 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 278.71ms Time] [2021-11-13 18:01:48,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-13 18:01:48,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 112. [2021-11-13 18:01:48,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 93 states have internal predecessors, (98), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:01:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2021-11-13 18:01:48,857 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 64 [2021-11-13 18:01:48,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:48,858 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2021-11-13 18:01:48,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:01:48,858 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2021-11-13 18:01:48,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:01:48,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:48,860 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:48,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-13 18:01:48,860 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:01:48,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:48,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1206656096, now seen corresponding path program 1 times [2021-11-13 18:01:48,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:48,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313127895] [2021-11-13 18:01:48,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:48,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:49,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:01:49,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:49,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:01:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:49,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:49,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:01:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:49,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:01:49,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:49,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:01:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:49,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:01:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:01:50,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:50,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313127895] [2021-11-13 18:01:50,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313127895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:01:50,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059507342] [2021-11-13 18:01:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:50,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:50,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:01:50,103 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:01:50,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 18:01:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:50,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-13 18:01:50,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:50,319 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 18:01:50,533 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:01:50,534 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 18:01:50,665 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 11 treesize of output 7 [2021-11-13 18:01:50,811 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 18:01:50,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-11-13 18:01:51,440 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 18:01:51,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:01:51,548 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-11-13 18:01:51,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 25 [2021-11-13 18:01:52,919 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int) (sll_circular_update_at_~data Int)) (= |c_#memory_int| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_int)| .cse0 (store (select |c_old(#memory_int)| .cse0) (+ sll_circular_update_at_~head.offset 4) sll_circular_update_at_~data))))) is different from true [2021-11-13 18:01:52,943 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:01:52,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 33 [2021-11-13 18:01:52,958 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-13 18:01:52,959 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 27 treesize of output 26 [2021-11-13 18:01:53,655 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-11-13 18:01:53,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-11-13 18:01:53,722 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-13 18:01:53,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:02:23,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059507342] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:02:23,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:02:23,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 63 [2021-11-13 18:02:23,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674723303] [2021-11-13 18:02:23,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:02:23,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-13 18:02:23,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:02:23,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-13 18:02:23,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=4451, Unknown=18, NotChecked=134, Total=4830 [2021-11-13 18:02:23,591 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand has 63 states, 58 states have (on average 1.603448275862069) internal successors, (93), 50 states have internal predecessors, (93), 10 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-13 18:02:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:02:32,664 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2021-11-13 18:02:32,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-13 18:02:32,665 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 58 states have (on average 1.603448275862069) internal successors, (93), 50 states have internal predecessors, (93), 10 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) Word has length 67 [2021-11-13 18:02:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:02:32,666 INFO L225 Difference]: With dead ends: 135 [2021-11-13 18:02:32,666 INFO L226 Difference]: Without dead ends: 135 [2021-11-13 18:02:32,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 41.0s TimeCoverageRelationStatistics Valid=415, Invalid=7218, Unknown=27, NotChecked=172, Total=7832 [2021-11-13 18:02:32,669 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 252 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 984.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 2944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.54ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 1171.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:02:32,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 718 Invalid, 2944 Unknown, 0 Unchecked, 11.54ms Time], IncrementalHoareTripleChecker [53 Valid, 2231 Invalid, 0 Unknown, 660 Unchecked, 1171.91ms Time] [2021-11-13 18:02:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-13 18:02:32,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2021-11-13 18:02:32,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 93 states have internal predecessors, (97), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:02:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-11-13 18:02:32,674 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 67 [2021-11-13 18:02:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:02:32,674 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-11-13 18:02:32,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 58 states have (on average 1.603448275862069) internal successors, (93), 50 states have internal predecessors, (93), 10 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-13 18:02:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-11-13 18:02:32,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-13 18:02:32,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:02:32,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:02:32,707 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-13 18:02:32,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-13 18:02:32,891 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:02:32,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:02:32,891 INFO L85 PathProgramCache]: Analyzing trace with hash -2112045542, now seen corresponding path program 1 times [2021-11-13 18:02:32,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:02:32,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419800367] [2021-11-13 18:02:32,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:32,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:02:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:33,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:02:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:33,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:02:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:33,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:02:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:33,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:02:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:33,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:02:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:33,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:02:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:33,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:02:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:02:33,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:02:33,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419800367] [2021-11-13 18:02:33,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419800367] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:02:33,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599384719] [2021-11-13 18:02:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:02:33,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:02:33,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:02:33,691 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:02:33,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 18:02:33,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:02:33,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-13 18:02:33,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:02:33,885 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 18:02:34,029 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:02:34,029 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 18:02:34,099 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 11 treesize of output 7 [2021-11-13 18:02:34,188 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 18:02:34,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-11-13 18:02:34,469 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:02:34,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-11-13 18:02:52,474 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-13 18:02:52,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 33 [2021-11-13 18:02:52,563 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:02:52,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-11-13 18:03:21,393 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-11-13 18:03:21,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 51 [2021-11-13 18:03:25,373 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 25 treesize of output 13 [2021-11-13 18:03:25,380 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:03:25,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:54,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599384719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:03:54,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:03:54,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 50 [2021-11-13 18:03:54,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383235824] [2021-11-13 18:03:54,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:03:54,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-13 18:03:54,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:54,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-13 18:03:54,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2438, Unknown=54, NotChecked=0, Total=2652 [2021-11-13 18:03:54,118 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 51 states, 50 states have (on average 2.06) internal successors, (103), 39 states have internal predecessors, (103), 6 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-13 18:04:07,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:07,933 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2021-11-13 18:04:07,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-13 18:04:07,934 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.06) internal successors, (103), 39 states have internal predecessors, (103), 6 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) Word has length 75 [2021-11-13 18:04:07,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:07,935 INFO L225 Difference]: With dead ends: 143 [2021-11-13 18:04:07,935 INFO L226 Difference]: Without dead ends: 143 [2021-11-13 18:04:07,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 85 SyntacticMatches, 11 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 92.8s TimeCoverageRelationStatistics Valid=349, Invalid=4421, Unknown=60, NotChecked=0, Total=4830 [2021-11-13 18:04:07,937 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 270 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 941.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 2652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.28ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 761 IncrementalHoareTripleChecker+Unchecked, 1118.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:07,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 866 Invalid, 2652 Unknown, 0 Unchecked, 15.28ms Time], IncrementalHoareTripleChecker [35 Valid, 1856 Invalid, 0 Unknown, 761 Unchecked, 1118.86ms Time] [2021-11-13 18:04:07,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-13 18:04:07,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 116. [2021-11-13 18:04:07,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 97 states have internal predecessors, (104), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:04:07,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2021-11-13 18:04:07,944 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 75 [2021-11-13 18:04:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:07,944 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2021-11-13 18:04:07,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.06) internal successors, (103), 39 states have internal predecessors, (103), 6 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-13 18:04:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2021-11-13 18:04:07,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-13 18:04:07,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:07,946 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:07,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:08,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-13 18:04:08,163 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting sll_circular_get_data_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:04:08,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:08,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2112045541, now seen corresponding path program 1 times [2021-11-13 18:04:08,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:04:08,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236714174] [2021-11-13 18:04:08,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:08,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:04:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:08,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:04:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:08,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:04:08,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:08,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:04:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:08,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:04:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:09,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:04:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:09,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:04:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:09,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:04:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 18:04:09,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:04:09,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236714174] [2021-11-13 18:04:09,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236714174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:04:09,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073307689] [2021-11-13 18:04:09,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:09,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:09,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:04:09,417 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:04:09,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 18:04:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:09,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-13 18:04:09,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:09,563 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 18:04:09,568 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 18:04:10,043 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:04:10,044 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 18:04:10,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-13 18:04:10,193 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 11 treesize of output 7 [2021-11-13 18:04:10,200 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 11 treesize of output 7 [2021-11-13 18:04:10,372 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 18:04:10,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-11-13 18:04:10,390 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-13 18:04:10,390 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 55 treesize of output 50 [2021-11-13 18:04:10,873 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:04:10,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 35 [2021-11-13 18:04:10,878 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:04:10,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-11-13 18:04:16,883 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-13 18:04:16,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 66 [2021-11-13 18:04:16,925 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-13 18:04:16,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 69 treesize of output 56 [2021-11-13 18:04:17,121 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:04:17,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 35 [2021-11-13 18:04:17,129 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:04:17,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-11-13 18:04:27,857 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-11-13 18:04:27,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 84 [2021-11-13 18:04:27,893 INFO L354 Elim1Store]: treesize reduction 90, result has 21.7 percent of original size [2021-11-13 18:04:27,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 84 treesize of output 65 [2021-11-13 18:04:28,673 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 44 treesize of output 32 [2021-11-13 18:04:28,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-13 18:04:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:04:28,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:31,470 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_DerPreprocessor_5 Int) (v_sll_circular_update_at_~head.offset_52 Int)) (<= 0 (+ (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~s~0.base) c_main_~s~0.offset))) (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) (+ v_sll_circular_update_at_~head.offset_52 4) v_DerPreprocessor_5))) c_main_~s~0.base) c_main_~s~0.offset) 4))) (forall ((v_DerPreprocessor_6 Int) (v_DerPreprocessor_5 Int) (v_sll_circular_update_at_~head.offset_52 Int)) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| c_main_~s~0.base) c_main_~s~0.offset)) (.cse2 (+ v_sll_circular_update_at_~head.offset_52 4))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$.offset| .cse1 (store (select |c_#memory_$Pointer$.offset| .cse1) .cse2 v_DerPreprocessor_5)) c_main_~s~0.base) c_main_~s~0.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse1 (store (select |c_#memory_$Pointer$.base| .cse1) .cse2 v_DerPreprocessor_6)) c_main_~s~0.base) c_main_~s~0.offset)))))) is different from false [2021-11-13 18:04:31,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073307689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:04:31,472 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:04:31,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 59 [2021-11-13 18:04:31,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51067374] [2021-11-13 18:04:31,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:31,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-13 18:04:31,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:04:31,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-13 18:04:31,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=3941, Unknown=7, NotChecked=126, Total=4290 [2021-11-13 18:04:31,477 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 47 states have internal predecessors, (113), 8 states have call successors, (16), 9 states have call predecessors, (16), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-11-13 18:04:34,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:34,041 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2021-11-13 18:04:34,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 18:04:34,042 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 47 states have internal predecessors, (113), 8 states have call successors, (16), 9 states have call predecessors, (16), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) Word has length 75 [2021-11-13 18:04:34,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:34,043 INFO L225 Difference]: With dead ends: 142 [2021-11-13 18:04:34,043 INFO L226 Difference]: Without dead ends: 142 [2021-11-13 18:04:34,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=352, Invalid=6125, Unknown=7, NotChecked=158, Total=6642 [2021-11-13 18:04:34,046 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 200 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1760 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1113.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.97ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 1291.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:34,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 952 Invalid, 2269 Unknown, 0 Unchecked, 10.97ms Time], IncrementalHoareTripleChecker [29 Valid, 1760 Invalid, 0 Unknown, 480 Unchecked, 1291.29ms Time] [2021-11-13 18:04:34,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-13 18:04:34,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 115. [2021-11-13 18:04:34,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 96 states have internal predecessors, (101), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:04:34,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2021-11-13 18:04:34,052 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 75 [2021-11-13 18:04:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:34,053 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2021-11-13 18:04:34,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 47 states have internal predecessors, (113), 8 states have call successors, (16), 9 states have call predecessors, (16), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-11-13 18:04:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2021-11-13 18:04:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-13 18:04:34,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:34,055 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:34,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:34,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:34,275 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:04:34,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:34,275 INFO L85 PathProgramCache]: Analyzing trace with hash -32108403, now seen corresponding path program 1 times [2021-11-13 18:04:34,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:04:34,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62781185] [2021-11-13 18:04:34,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:34,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:04:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:34,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:04:34,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:34,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:04:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:34,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:04:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:34,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:04:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:34,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:04:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:34,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:04:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:34,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:04:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:34,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:04:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 18:04:34,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:04:34,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62781185] [2021-11-13 18:04:34,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62781185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:04:34,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585010072] [2021-11-13 18:04:34,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:34,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:34,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:04:34,447 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:04:34,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-13 18:04:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:34,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:04:34,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 18:04:34,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:04:34,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585010072] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:34,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:04:34,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-11-13 18:04:34,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104246606] [2021-11-13 18:04:34,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:34,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:04:34,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:04:34,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:04:34,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:04:34,813 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-13 18:04:34,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:34,894 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2021-11-13 18:04:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:04:34,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 78 [2021-11-13 18:04:34,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:34,896 INFO L225 Difference]: With dead ends: 119 [2021-11-13 18:04:34,896 INFO L226 Difference]: Without dead ends: 115 [2021-11-13 18:04:34,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:04:34,897 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 22 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.09ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.65ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:34,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 339 Invalid, 61 Unknown, 0 Unchecked, 1.09ms Time], IncrementalHoareTripleChecker [6 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 58.65ms Time] [2021-11-13 18:04:34,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-13 18:04:34,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-11-13 18:04:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 96 states have internal predecessors, (100), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:04:34,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2021-11-13 18:04:34,902 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 78 [2021-11-13 18:04:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:34,905 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2021-11-13 18:04:34,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-13 18:04:34,906 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2021-11-13 18:04:34,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-13 18:04:34,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:34,909 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:34,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:35,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-13 18:04:35,122 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:04:35,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:35,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1323929965, now seen corresponding path program 2 times [2021-11-13 18:04:35,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:04:35,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966705591] [2021-11-13 18:04:35,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:35,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:04:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:35,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:04:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:35,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:04:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:35,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:04:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:35,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:04:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:35,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:04:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:35,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:04:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:35,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:04:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 18:04:35,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:04:35,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966705591] [2021-11-13 18:04:35,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966705591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:04:35,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82708792] [2021-11-13 18:04:35,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:04:35,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:35,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:04:35,319 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:04:35,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-13 18:04:35,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:04:35,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:04:35,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:04:35,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 18:04:35,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 18:04:35,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82708792] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:35,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:04:35,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 11 [2021-11-13 18:04:35,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863338670] [2021-11-13 18:04:35,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:35,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:04:35,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:04:35,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:04:35,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:04:35,863 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:04:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:36,353 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2021-11-13 18:04:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:04:36,354 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 78 [2021-11-13 18:04:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:36,355 INFO L225 Difference]: With dead ends: 125 [2021-11-13 18:04:36,356 INFO L226 Difference]: Without dead ends: 125 [2021-11-13 18:04:36,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:04:36,357 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 122 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 279.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.29ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 334.70ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:36,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 265 Invalid, 435 Unknown, 0 Unchecked, 3.29ms Time], IncrementalHoareTripleChecker [38 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 334.70ms Time] [2021-11-13 18:04:36,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-13 18:04:36,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 106. [2021-11-13 18:04:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 87 states have internal predecessors, (89), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:04:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-11-13 18:04:36,362 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 78 [2021-11-13 18:04:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:36,363 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-11-13 18:04:36,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:04:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-11-13 18:04:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-13 18:04:36,365 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:36,365 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:36,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-11-13 18:04:36,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:36,583 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:04:36,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:36,583 INFO L85 PathProgramCache]: Analyzing trace with hash -841344934, now seen corresponding path program 1 times [2021-11-13 18:04:36,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:04:36,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765150376] [2021-11-13 18:04:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:36,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:04:36,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:36,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:04:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:36,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:04:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:37,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:04:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:37,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:04:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:37,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:04:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:37,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:04:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:38,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:04:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:38,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:04:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:04:38,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:04:38,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765150376] [2021-11-13 18:04:38,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765150376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:04:38,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877097528] [2021-11-13 18:04:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:38,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:38,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:04:38,630 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:04:38,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-13 18:04:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:38,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-13 18:04:38,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:38,798 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 18:04:39,199 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:04:39,199 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 18:04:39,324 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 11 treesize of output 7 [2021-11-13 18:04:39,477 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 18:04:39,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-11-13 18:04:41,183 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base| (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_sll_circular_update_at_#in~head.base|) .cse0))))) (<= |c_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset))) is different from true [2021-11-13 18:04:41,220 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-13 18:04:41,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 28 [2021-11-13 18:04:41,733 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 25 treesize of output 17 [2021-11-13 18:04:41,902 INFO L354 Elim1Store]: treesize reduction 86, result has 22.5 percent of original size [2021-11-13 18:04:41,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 100 [2021-11-13 18:04:41,919 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-13 18:04:41,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 74 [2021-11-13 18:04:44,186 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~s~0.base_BEFORE_CALL_24 Int) (v_main_~s~0.offset_BEFORE_CALL_24 Int)) (not (= v_main_~s~0.base_BEFORE_CALL_24 (select (select |c_#memory_$Pointer$.base| v_main_~s~0.base_BEFORE_CALL_24) v_main_~s~0.offset_BEFORE_CALL_24)))) is different from true [2021-11-13 18:04:46,565 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~s~0.offset_BEFORE_CALL_25 Int) (v_main_~s~0.base_BEFORE_CALL_25 Int)) (not (= v_main_~s~0.base_BEFORE_CALL_25 (select (select |c_#memory_$Pointer$.base| v_main_~s~0.base_BEFORE_CALL_25) v_main_~s~0.offset_BEFORE_CALL_25)))) is different from true [2021-11-13 18:05:01,255 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:05:01,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2021-11-13 18:05:01,259 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 47 treesize of output 39 [2021-11-13 18:05:01,262 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 39 treesize of output 27 [2021-11-13 18:05:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-11-13 18:05:01,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:06,675 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 246 treesize of output 218 [2021-11-13 18:05:06,721 INFO L354 Elim1Store]: treesize reduction 52, result has 29.7 percent of original size [2021-11-13 18:05:06,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 266 treesize of output 222 [2021-11-13 18:05:06,727 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 202 treesize of output 182 [2021-11-13 18:05:07,253 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 166 treesize of output 138 [2021-11-13 18:05:10,906 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_sll_circular_update_at_~head.offset_68 Int)) (or (and (< c_main_~i~0 1) (<= 0 c_main_~i~0) (forall ((v_DerPreprocessor_10 Int)) (not (= (select (store (select |c_#memory_$Pointer$.base| c_main_~s~0.base) (+ v_sll_circular_update_at_~head.offset_68 4) v_DerPreprocessor_10) c_main_~s~0.offset) c_main_~s~0.base)))) (< v_sll_circular_update_at_~head.offset_68 c_main_~s~0.offset))) is different from false [2021-11-13 18:05:10,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877097528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:05:10,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:05:10,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 73 [2021-11-13 18:05:10,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480701382] [2021-11-13 18:05:10,908 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:05:10,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-13 18:05:10,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:10,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-13 18:05:10,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=7223, Unknown=8, NotChecked=692, Total=8190 [2021-11-13 18:05:10,913 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 73 states, 69 states have (on average 1.7536231884057971) internal successors, (121), 59 states have internal predecessors, (121), 11 states have call successors, (17), 9 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2021-11-13 18:05:44,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:44,530 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2021-11-13 18:05:44,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-13 18:05:44,531 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 69 states have (on average 1.7536231884057971) internal successors, (121), 59 states have internal predecessors, (121), 11 states have call successors, (17), 9 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) Word has length 81 [2021-11-13 18:05:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:44,534 INFO L225 Difference]: With dead ends: 123 [2021-11-13 18:05:44,535 INFO L226 Difference]: Without dead ends: 123 [2021-11-13 18:05:44,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 118 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 2207 ImplicationChecksByTransitivity, 63.7s TimeCoverageRelationStatistics Valid=532, Invalid=12811, Unknown=13, NotChecked=924, Total=14280 [2021-11-13 18:05:44,538 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 160 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 2879 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1599.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 4313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.80ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1386 IncrementalHoareTripleChecker+Unchecked, 1848.82ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:44,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 1007 Invalid, 4313 Unknown, 0 Unchecked, 18.80ms Time], IncrementalHoareTripleChecker [48 Valid, 2879 Invalid, 0 Unknown, 1386 Unchecked, 1848.82ms Time] [2021-11-13 18:05:44,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-13 18:05:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2021-11-13 18:05:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 75 states have (on average 1.16) internal successors, (87), 85 states have internal predecessors, (87), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:05:44,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2021-11-13 18:05:44,545 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 81 [2021-11-13 18:05:44,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:44,545 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2021-11-13 18:05:44,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 69 states have (on average 1.7536231884057971) internal successors, (121), 59 states have internal predecessors, (121), 11 states have call successors, (17), 9 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2021-11-13 18:05:44,546 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2021-11-13 18:05:44,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-13 18:05:44,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:44,547 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:44,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:44,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-13 18:05:44,767 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting sll_circular_destroyErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:05:44,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:44,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1153762942, now seen corresponding path program 1 times [2021-11-13 18:05:44,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:44,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871247343] [2021-11-13 18:05:44,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:44,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:44,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:05:44,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:44,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:44,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:44,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:05:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:44,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:05:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:44,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:05:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:44,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:05:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:44,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:05:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:44,916 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 18:05:44,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:44,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871247343] [2021-11-13 18:05:44,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871247343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:05:44,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942286097] [2021-11-13 18:05:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:44,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:44,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:05:44,922 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:05:44,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-13 18:05:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 18:05:45,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:45,102 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 18:05:45,520 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 18:05:45,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:05:45,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942286097] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:45,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:05:45,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 17 [2021-11-13 18:05:45,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766660344] [2021-11-13 18:05:45,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:45,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:05:45,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:45,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:05:45,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:05:45,522 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:05:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:45,765 INFO L93 Difference]: Finished difference Result 121 states and 124 transitions. [2021-11-13 18:05:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 18:05:45,766 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 86 [2021-11-13 18:05:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:45,767 INFO L225 Difference]: With dead ends: 121 [2021-11-13 18:05:45,767 INFO L226 Difference]: Without dead ends: 121 [2021-11-13 18:05:45,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:05:45,768 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 64 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 156.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.96ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 183.15ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:45,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 470 Invalid, 327 Unknown, 0 Unchecked, 1.96ms Time], IncrementalHoareTripleChecker [1 Valid, 304 Invalid, 0 Unknown, 22 Unchecked, 183.15ms Time] [2021-11-13 18:05:45,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-13 18:05:45,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 107. [2021-11-13 18:05:45,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 88 states have internal predecessors, (93), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:05:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-11-13 18:05:45,772 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 86 [2021-11-13 18:05:45,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:45,772 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-11-13 18:05:45,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:05:45,773 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-11-13 18:05:45,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-13 18:05:45,773 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:45,775 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:45,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:45,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-13 18:05:45,983 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting sll_circular_destroyErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:05:45,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:45,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1153762941, now seen corresponding path program 1 times [2021-11-13 18:05:45,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:45,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756709200] [2021-11-13 18:05:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:45,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:46,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:05:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:46,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:46,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:46,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:05:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:46,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:05:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:46,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:05:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:46,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:05:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:46,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:05:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 18:05:46,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:46,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756709200] [2021-11-13 18:05:46,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756709200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:46,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:46,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-13 18:05:46,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510380733] [2021-11-13 18:05:46,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:46,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:05:46,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:46,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:05:46,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:05:46,312 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:05:47,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:47,076 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2021-11-13 18:05:47,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:05:47,077 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 86 [2021-11-13 18:05:47,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:47,078 INFO L225 Difference]: With dead ends: 118 [2021-11-13 18:05:47,078 INFO L226 Difference]: Without dead ends: 118 [2021-11-13 18:05:47,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:05:47,079 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 211 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 456.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.41ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 528.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:47,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 248 Invalid, 730 Unknown, 0 Unchecked, 4.41ms Time], IncrementalHoareTripleChecker [30 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 528.22ms Time] [2021-11-13 18:05:47,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-13 18:05:47,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2021-11-13 18:05:47,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 79 states have (on average 1.139240506329114) internal successors, (90), 86 states have internal predecessors, (90), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:05:47,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-11-13 18:05:47,083 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 86 [2021-11-13 18:05:47,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:47,083 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-11-13 18:05:47,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:05:47,083 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-11-13 18:05:47,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-13 18:05:47,084 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:47,084 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:47,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-13 18:05:47,085 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting sll_circular_destroyErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:05:47,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:47,085 INFO L85 PathProgramCache]: Analyzing trace with hash 871538537, now seen corresponding path program 1 times [2021-11-13 18:05:47,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:47,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135728138] [2021-11-13 18:05:47,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:47,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:05:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:47,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:05:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:05:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:05:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:05:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:05:47,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 18:05:47,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:47,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135728138] [2021-11-13 18:05:47,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135728138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:05:47,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720969908] [2021-11-13 18:05:47,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:47,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:47,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:05:47,319 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:05:47,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-13 18:05:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-13 18:05:47,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:47,898 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 23 treesize of output 15 [2021-11-13 18:05:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:05:47,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:48,139 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-13 18:05:48,139 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 16 treesize of output 15 [2021-11-13 18:05:48,222 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-13 18:05:48,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 18:05:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 18:05:48,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720969908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:05:48,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:05:48,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 10] total 31 [2021-11-13 18:05:48,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130877819] [2021-11-13 18:05:48,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:05:48,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-13 18:05:48,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:48,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-13 18:05:48,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2021-11-13 18:05:48,517 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 24 states have internal predecessors, (106), 5 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (13), 7 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 18:05:49,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:49,679 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2021-11-13 18:05:49,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-13 18:05:49,680 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 24 states have internal predecessors, (106), 5 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (13), 7 states have call predecessors, (13), 2 states have call successors, (13) Word has length 89 [2021-11-13 18:05:49,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:49,680 INFO L225 Difference]: With dead ends: 118 [2021-11-13 18:05:49,681 INFO L226 Difference]: Without dead ends: 118 [2021-11-13 18:05:49,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=194, Invalid=1876, Unknown=0, NotChecked=0, Total=2070 [2021-11-13 18:05:49,681 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 166 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 618.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.83ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 731.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:49,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 687 Invalid, 1486 Unknown, 0 Unchecked, 5.83ms Time], IncrementalHoareTripleChecker [34 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 731.90ms Time] [2021-11-13 18:05:49,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-13 18:05:49,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2021-11-13 18:05:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.1375) internal successors, (91), 86 states have internal predecessors, (91), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:05:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2021-11-13 18:05:49,685 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 89 [2021-11-13 18:05:49,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:49,686 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2021-11-13 18:05:49,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 24 states have internal predecessors, (106), 5 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (13), 7 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 18:05:49,686 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2021-11-13 18:05:49,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-13 18:05:49,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:49,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:49,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:49,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-13 18:05:49,899 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting sll_circular_destroyErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:05:49,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:49,899 INFO L85 PathProgramCache]: Analyzing trace with hash 871538538, now seen corresponding path program 1 times [2021-11-13 18:05:49,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:49,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810901374] [2021-11-13 18:05:49,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:49,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:05:50,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:05:50,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:05:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:05:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:51,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:05:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:51,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:05:51,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:05:51,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:51,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810901374] [2021-11-13 18:05:51,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810901374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:05:51,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861625934] [2021-11-13 18:05:51,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:51,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:51,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:05:51,242 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:05:51,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-13 18:05:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:51,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-13 18:05:51,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:51,410 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 18:05:51,778 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:05:51,778 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 18:05:51,940 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 11 treesize of output 7 [2021-11-13 18:05:51,947 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 11 treesize of output 7 [2021-11-13 18:05:52,148 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 18:05:52,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 49 [2021-11-13 18:05:52,159 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-13 18:05:52,159 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 55 treesize of output 50 [2021-11-13 18:05:55,361 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.offset| |c_sll_circular_update_at_#in~head.base|) .cse0)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_sll_circular_update_at_#in~head.base|) .cse0)))) (<= |c_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset)))) is different from true [2021-11-13 18:05:55,413 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-11-13 18:05:55,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 80 [2021-11-13 18:05:55,436 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-11-13 18:05:55,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 74 treesize of output 63 [2021-11-13 18:05:57,529 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (= |c_#memory_$Pointer$.offset| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_$Pointer$.offset)| .cse0 (let ((.cse1 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$Pointer$.offset)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1))))))) is different from true [2021-11-13 18:05:57,568 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-11-13 18:05:57,569 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 84 treesize of output 72 [2021-11-13 18:05:57,607 INFO L354 Elim1Store]: treesize reduction 60, result has 36.8 percent of original size [2021-11-13 18:05:57,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 69 treesize of output 72 [2021-11-13 18:06:02,784 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 81 treesize of output 73 [2021-11-13 18:06:02,798 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-11-13 18:06:02,798 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 73 treesize of output 56 [2021-11-13 18:06:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2021-11-13 18:06:02,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:03,438 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 11 [2021-11-13 18:06:03,440 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 18:06:03,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:06:03,629 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 23 treesize of output 27 [2021-11-13 18:06:03,877 INFO L354 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-11-13 18:06:03,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-13 18:06:04,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861625934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:06:04,186 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:06:04,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 65 [2021-11-13 18:06:04,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969998843] [2021-11-13 18:06:04,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:06:04,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-13 18:06:04,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:06:04,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-13 18:06:04,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=5324, Unknown=3, NotChecked=294, Total=5852 [2021-11-13 18:06:04,188 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand has 66 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 53 states have internal predecessors, (125), 11 states have call successors, (17), 8 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-13 18:06:12,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:12,632 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2021-11-13 18:06:12,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-13 18:06:12,633 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 53 states have internal predecessors, (125), 11 states have call successors, (17), 8 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) Word has length 89 [2021-11-13 18:06:12,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:12,634 INFO L225 Difference]: With dead ends: 114 [2021-11-13 18:06:12,634 INFO L226 Difference]: Without dead ends: 114 [2021-11-13 18:06:12,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=476, Invalid=9629, Unknown=3, NotChecked=398, Total=10506 [2021-11-13 18:06:12,636 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 255 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 2112 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 894.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1194 SdHoareTripleChecker+Invalid, 3071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.75ms SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 2112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 880 IncrementalHoareTripleChecker+Unchecked, 1041.61ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:12,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 1194 Invalid, 3071 Unknown, 0 Unchecked, 8.75ms Time], IncrementalHoareTripleChecker [79 Valid, 2112 Invalid, 0 Unknown, 880 Unchecked, 1041.61ms Time] [2021-11-13 18:06:12,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-13 18:06:12,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2021-11-13 18:06:12,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 88 states have internal predecessors, (92), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:06:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2021-11-13 18:06:12,641 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 89 [2021-11-13 18:06:12,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:12,641 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2021-11-13 18:06:12,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 53 states have internal predecessors, (125), 11 states have call successors, (17), 8 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) [2021-11-13 18:06:12,642 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2021-11-13 18:06:12,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-13 18:06:12,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:12,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:12,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-13 18:06:12,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-13 18:06:12,871 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:06:12,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:12,871 INFO L85 PathProgramCache]: Analyzing trace with hash 904070889, now seen corresponding path program 1 times [2021-11-13 18:06:12,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:06:12,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240120966] [2021-11-13 18:06:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:12,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:06:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:12,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:06:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:12,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:06:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:12,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:06:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:12,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:06:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:13,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:06:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:13,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:06:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:13,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:06:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:13,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:06:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:13,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 18:06:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 18:06:13,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:06:13,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240120966] [2021-11-13 18:06:13,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240120966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:06:13,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:06:13,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-13 18:06:13,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980862104] [2021-11-13 18:06:13,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:06:13,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:06:13,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:06:13,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:06:13,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:06:13,110 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 10 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:06:13,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:13,572 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2021-11-13 18:06:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:06:13,572 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 10 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2021-11-13 18:06:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:13,573 INFO L225 Difference]: With dead ends: 113 [2021-11-13 18:06:13,574 INFO L226 Difference]: Without dead ends: 111 [2021-11-13 18:06:13,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:06:13,574 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 126 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 267.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.92ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 314.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:13,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 381 Invalid, 638 Unknown, 0 Unchecked, 2.92ms Time], IncrementalHoareTripleChecker [26 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 314.59ms Time] [2021-11-13 18:06:13,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-13 18:06:13,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-11-13 18:06:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 88 states have internal predecessors, (91), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:06:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2021-11-13 18:06:13,579 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 89 [2021-11-13 18:06:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:13,579 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2021-11-13 18:06:13,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 10 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 18:06:13,580 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2021-11-13 18:06:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-13 18:06:13,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:13,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:13,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-13 18:06:13,581 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:06:13,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:13,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1247889481, now seen corresponding path program 1 times [2021-11-13 18:06:13,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:06:13,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248923679] [2021-11-13 18:06:13,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:13,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:06:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:13,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:06:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:13,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:06:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:13,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:06:13,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:13,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:06:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:13,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:06:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:13,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:06:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:13,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:06:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:13,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:06:13,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 18:06:13,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:06:13,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248923679] [2021-11-13 18:06:13,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248923679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:06:13,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:06:13,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-13 18:06:13,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702003137] [2021-11-13 18:06:13,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:06:13,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:06:13,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:06:13,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:06:13,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:06:13,837 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:06:14,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:14,456 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2021-11-13 18:06:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:06:14,457 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2021-11-13 18:06:14,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:14,458 INFO L225 Difference]: With dead ends: 109 [2021-11-13 18:06:14,458 INFO L226 Difference]: Without dead ends: 109 [2021-11-13 18:06:14,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:06:14,459 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 164 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 384.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.88ms SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 446.38ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:14,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 273 Invalid, 672 Unknown, 0 Unchecked, 3.88ms Time], IncrementalHoareTripleChecker [28 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 446.38ms Time] [2021-11-13 18:06:14,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-13 18:06:14,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2021-11-13 18:06:14,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 87 states have internal predecessors, (89), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:06:14,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-11-13 18:06:14,463 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 90 [2021-11-13 18:06:14,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:14,464 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-11-13 18:06:14,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 18:06:14,464 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-11-13 18:06:14,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-13 18:06:14,465 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:14,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:14,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-13 18:06:14,465 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:06:14,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:14,465 INFO L85 PathProgramCache]: Analyzing trace with hash 927337902, now seen corresponding path program 1 times [2021-11-13 18:06:14,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:06:14,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203870259] [2021-11-13 18:06:14,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:14,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:06:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:14,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:06:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:14,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:06:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:14,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:06:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:15,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:06:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:15,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:06:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:15,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:06:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:15,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:06:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:15,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:06:15,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-13 18:06:15,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:06:15,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203870259] [2021-11-13 18:06:15,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203870259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:06:15,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904404816] [2021-11-13 18:06:15,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:15,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:06:15,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:06:15,491 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:06:15,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-13 18:06:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:15,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-13 18:06:15,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:15,662 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 18:06:15,745 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 18:06:15,863 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:06:15,863 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 18:06:15,903 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 11 treesize of output 7 [2021-11-13 18:06:16,006 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 18:06:16,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-11-13 18:06:16,258 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:06:16,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-11-13 18:06:17,255 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base| (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_sll_circular_update_at_#in~head.base|) .cse0))))) (<= |c_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset))) is different from true [2021-11-13 18:06:17,287 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-13 18:06:17,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 33 [2021-11-13 18:06:17,327 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:06:17,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-11-13 18:06:18,903 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (= |c_#memory_$Pointer$.base| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_$Pointer$.base)| .cse0 (let ((.cse1 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$Pointer$.base)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.base| .cse0) .cse1))))))) is different from true [2021-11-13 18:06:18,946 INFO L354 Elim1Store]: treesize reduction 127, result has 15.9 percent of original size [2021-11-13 18:06:18,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 57 [2021-11-13 18:06:19,389 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 25 treesize of output 13 [2021-11-13 18:06:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 2 not checked. [2021-11-13 18:06:19,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:38,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904404816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:06:38,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:06:38,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 45 [2021-11-13 18:06:38,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944517886] [2021-11-13 18:06:38,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:06:38,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-13 18:06:38,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:06:38,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-13 18:06:38,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1912, Unknown=10, NotChecked=178, Total=2256 [2021-11-13 18:06:38,185 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 35 states have internal predecessors, (109), 6 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-13 18:06:43,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:43,946 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2021-11-13 18:06:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-13 18:06:43,947 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 35 states have internal predecessors, (109), 6 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) Word has length 92 [2021-11-13 18:06:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:43,948 INFO L225 Difference]: With dead ends: 110 [2021-11-13 18:06:43,948 INFO L226 Difference]: Without dead ends: 110 [2021-11-13 18:06:43,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 119 SyntacticMatches, 10 SemanticMatches, 65 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=412, Invalid=3746, Unknown=10, NotChecked=254, Total=4422 [2021-11-13 18:06:43,949 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 319 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 541.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.46ms SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 407 IncrementalHoareTripleChecker+Unchecked, 637.15ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:43,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 474 Invalid, 1362 Unknown, 0 Unchecked, 5.46ms Time], IncrementalHoareTripleChecker [82 Valid, 873 Invalid, 0 Unknown, 407 Unchecked, 637.15ms Time] [2021-11-13 18:06:43,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-13 18:06:43,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-11-13 18:06:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 88 states have internal predecessors, (90), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:06:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2021-11-13 18:06:43,953 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 92 [2021-11-13 18:06:43,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:43,953 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2021-11-13 18:06:43,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 35 states have internal predecessors, (109), 6 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2021-11-13 18:06:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2021-11-13 18:06:43,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-13 18:06:43,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:43,961 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:43,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-13 18:06:44,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-13 18:06:44,171 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting sll_circular_destroyErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:06:44,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:44,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1093942222, now seen corresponding path program 1 times [2021-11-13 18:06:44,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:06:44,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616604265] [2021-11-13 18:06:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:44,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:06:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:44,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:06:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:44,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:06:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:44,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:06:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:45,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:06:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:45,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:06:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:45,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:06:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:45,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:06:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:45,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:06:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 18:06:45,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:06:45,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616604265] [2021-11-13 18:06:45,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616604265] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:06:45,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744372662] [2021-11-13 18:06:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:45,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:06:45,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:06:45,739 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:06:45,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-13 18:06:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:45,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-13 18:06:45,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:45,926 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 18:06:46,181 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:06:46,181 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 18:06:46,323 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 11 treesize of output 7 [2021-11-13 18:06:46,330 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 11 treesize of output 7 [2021-11-13 18:06:46,471 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-13 18:06:46,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-11-13 18:06:46,492 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-13 18:06:46,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 41 [2021-11-13 18:06:48,275 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.offset| |c_sll_circular_update_at_#in~head.base|) .cse0)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_sll_circular_update_at_#in~head.base|) .cse0)))) (<= |c_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset)))) is different from true [2021-11-13 18:06:48,313 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-13 18:06:48,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 66 [2021-11-13 18:06:48,349 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-13 18:06:48,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 43 [2021-11-13 18:06:50,437 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|)) (.cse1 (+ sll_circular_update_at_~head.offset 4))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| .cse0 (store (select |c_old(#memory_$Pointer$.base)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.base| .cse0) .cse1)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| .cse0 (store (select |c_old(#memory_$Pointer$.offset)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1)))) (<= (select (select |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|) sll_circular_update_at_~head.offset)))) is different from true [2021-11-13 18:06:50,487 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-11-13 18:06:50,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 87 [2021-11-13 18:06:50,512 INFO L354 Elim1Store]: treesize reduction 165, result has 11.8 percent of original size [2021-11-13 18:06:50,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 50 [2021-11-13 18:06:55,201 INFO L354 Elim1Store]: treesize reduction 69, result has 9.2 percent of original size [2021-11-13 18:06:55,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 48 [2021-11-13 18:06:55,216 INFO L354 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2021-11-13 18:06:55,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 26 [2021-11-13 18:06:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 2 not checked. [2021-11-13 18:06:55,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:07:04,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744372662] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:07:04,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:07:04,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 62 [2021-11-13 18:07:04,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073926200] [2021-11-13 18:07:04,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:07:04,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-13 18:07:04,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:07:04,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-13 18:07:04,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=4328, Unknown=7, NotChecked=266, Total=4830 [2021-11-13 18:07:04,945 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 49 states have internal predecessors, (124), 7 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-13 18:07:17,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:17,881 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-11-13 18:07:17,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-13 18:07:17,881 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 49 states have internal predecessors, (124), 7 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) Word has length 95 [2021-11-13 18:07:17,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:17,882 INFO L225 Difference]: With dead ends: 96 [2021-11-13 18:07:17,882 INFO L226 Difference]: Without dead ends: 96 [2021-11-13 18:07:17,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 91 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1444 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=533, Invalid=7657, Unknown=8, NotChecked=358, Total=8556 [2021-11-13 18:07:17,884 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 257 mSDsluCounter, 711 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 878.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 1873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.20ms SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 991.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:17,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 752 Invalid, 1873 Unknown, 0 Unchecked, 7.20ms Time], IncrementalHoareTripleChecker [96 Valid, 1410 Invalid, 0 Unknown, 367 Unchecked, 991.89ms Time] [2021-11-13 18:07:17,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-13 18:07:17,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-11-13 18:07:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.013157894736842) internal successors, (77), 77 states have internal predecessors, (77), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:07:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-11-13 18:07:17,896 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 95 [2021-11-13 18:07:17,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:17,896 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-11-13 18:07:17,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 49 states have internal predecessors, (124), 7 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-13 18:07:17,897 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-11-13 18:07:17,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-13 18:07:17,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:17,898 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:17,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-13 18:07:18,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:07:18,111 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:07:18,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:18,111 INFO L85 PathProgramCache]: Analyzing trace with hash -988555106, now seen corresponding path program 1 times [2021-11-13 18:07:18,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:07:18,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224714853] [2021-11-13 18:07:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:07:18,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:07:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:18,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:07:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:18,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:07:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:18,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:07:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:18,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:07:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:18,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:07:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:18,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:07:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:19,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:07:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:19,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:07:19,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 18:07:19,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:07:19,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224714853] [2021-11-13 18:07:19,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224714853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:07:19,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239599333] [2021-11-13 18:07:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:07:19,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:07:19,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:07:19,131 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:07:19,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-13 18:07:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:19,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:07:19,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:07:19,668 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-13 18:07:19,669 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 20 treesize of output 26 [2021-11-13 18:07:19,853 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 18:07:19,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:07:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 18:07:20,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239599333] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:07:20,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:07:20,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 7, 7] total 40 [2021-11-13 18:07:20,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892811676] [2021-11-13 18:07:20,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:07:20,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-13 18:07:20,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:07:20,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-13 18:07:20,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1509, Unknown=0, NotChecked=0, Total=1640 [2021-11-13 18:07:20,344 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 41 states, 40 states have (on average 3.125) internal successors, (125), 34 states have internal predecessors, (125), 4 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 18:07:22,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:22,083 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2021-11-13 18:07:22,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 18:07:22,084 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.125) internal successors, (125), 34 states have internal predecessors, (125), 4 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 97 [2021-11-13 18:07:22,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:22,084 INFO L225 Difference]: With dead ends: 95 [2021-11-13 18:07:22,085 INFO L226 Difference]: Without dead ends: 95 [2021-11-13 18:07:22,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=333, Invalid=3207, Unknown=0, NotChecked=0, Total=3540 [2021-11-13 18:07:22,085 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 122 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 700.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.01ms SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 799.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:22,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 461 Invalid, 1267 Unknown, 0 Unchecked, 6.01ms Time], IncrementalHoareTripleChecker [49 Valid, 1160 Invalid, 0 Unknown, 58 Unchecked, 799.00ms Time] [2021-11-13 18:07:22,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-11-13 18:07:22,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-11-13 18:07:22,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 76 states have (on average 1.0) internal successors, (76), 76 states have internal predecessors, (76), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-13 18:07:22,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-11-13 18:07:22,089 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 97 [2021-11-13 18:07:22,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:22,089 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-11-13 18:07:22,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.125) internal successors, (125), 34 states have internal predecessors, (125), 4 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-11-13 18:07:22,090 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-11-13 18:07:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 18:07:22,090 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:22,091 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:22,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-13 18:07:22,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-13 18:07:22,311 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-11-13 18:07:22,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:22,311 INFO L85 PathProgramCache]: Analyzing trace with hash -261539966, now seen corresponding path program 1 times [2021-11-13 18:07:22,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:07:22,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019962252] [2021-11-13 18:07:22,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:07:22,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:07:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:22,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 18:07:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:22,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:07:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:22,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:07:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:22,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 18:07:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:23,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 18:07:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:23,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 18:07:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:23,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:07:23,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:23,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-11-13 18:07:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:23,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 18:07:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 18:07:23,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:07:23,876 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019962252] [2021-11-13 18:07:23,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019962252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:07:23,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350792818] [2021-11-13 18:07:23,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:07:23,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:07:23,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:07:23,879 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:07:23,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-13 18:07:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:24,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-13 18:07:24,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:07:24,424 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-13 18:07:24,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-11-13 18:07:24,604 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 11 treesize of output 7 [2021-11-13 18:07:24,781 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 18:07:24,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 32 [2021-11-13 18:07:25,249 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:07:25,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-11-13 18:07:25,259 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 18:07:25,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-11-13 18:07:37,338 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-11-13 18:07:37,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 44 [2021-11-13 18:07:37,639 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:07:37,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 40 [2021-11-13 18:07:37,644 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 18:07:37,645 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 37 treesize of output 33 [2021-11-13 18:07:38,480 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-11-13 18:07:38,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 77 [2021-11-13 18:07:38,672 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:07:38,672 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 37 treesize of output 29 [2021-11-13 18:07:39,000 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:07:39,000 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 37 treesize of output 29 [2021-11-13 18:07:39,353 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:07:39,354 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 37 treesize of output 29 [2021-11-13 18:07:39,359 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 18:07:39,359 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 23 treesize of output 15 [2021-11-13 18:08:08,283 INFO L354 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2021-11-13 18:08:08,284 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 64 treesize of output 55 [2021-11-13 18:08:08,297 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-13 18:08:08,297 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 46 treesize of output 43 [2021-11-13 18:08:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-13 18:08:08,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:08:08,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350792818] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:08:08,667 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:08:08,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 61 [2021-11-13 18:08:08,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987669745] [2021-11-13 18:08:08,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:08:08,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-13 18:08:08,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:08,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-13 18:08:08,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=3698, Unknown=15, NotChecked=0, Total=3906 [2021-11-13 18:08:08,670 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 62 states, 61 states have (on average 2.262295081967213) internal successors, (138), 52 states have internal predecessors, (138), 8 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-13 18:08:28,944 WARN L227 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 33 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-13 18:08:39,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:39,250 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-11-13 18:08:39,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-13 18:08:39,251 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.262295081967213) internal successors, (138), 52 states have internal predecessors, (138), 8 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) Word has length 101 [2021-11-13 18:08:39,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:39,251 INFO L225 Difference]: With dead ends: 94 [2021-11-13 18:08:39,251 INFO L226 Difference]: Without dead ends: 0 [2021-11-13 18:08:39,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 73.8s TimeCoverageRelationStatistics Valid=407, Invalid=7765, Unknown=18, NotChecked=0, Total=8190 [2021-11-13 18:08:39,252 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 66 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 404.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.33ms SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 789 IncrementalHoareTripleChecker+Unchecked, 458.68ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:39,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 657 Invalid, 1421 Unknown, 0 Unchecked, 4.33ms Time], IncrementalHoareTripleChecker [37 Valid, 595 Invalid, 0 Unknown, 789 Unchecked, 458.68ms Time] [2021-11-13 18:08:39,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-13 18:08:39,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-13 18:08:39,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:08:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-13 18:08:39,253 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 101 [2021-11-13 18:08:39,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:39,253 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-13 18:08:39,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.262295081967213) internal successors, (138), 52 states have internal predecessors, (138), 8 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-13 18:08:39,253 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-13 18:08:39,253 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-13 18:08:39,255 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION (27 of 28 remaining) [2021-11-13 18:08:39,255 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION (26 of 28 remaining) [2021-11-13 18:08:39,256 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION (25 of 28 remaining) [2021-11-13 18:08:39,256 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION (24 of 28 remaining) [2021-11-13 18:08:39,256 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK (23 of 28 remaining) [2021-11-13 18:08:39,256 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK (22 of 28 remaining) [2021-11-13 18:08:39,256 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr0REQUIRES_VIOLATION (21 of 28 remaining) [2021-11-13 18:08:39,256 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr1REQUIRES_VIOLATION (20 of 28 remaining) [2021-11-13 18:08:39,256 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr2REQUIRES_VIOLATION (19 of 28 remaining) [2021-11-13 18:08:39,256 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr3REQUIRES_VIOLATION (18 of 28 remaining) [2021-11-13 18:08:39,256 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr0REQUIRES_VIOLATION (17 of 28 remaining) [2021-11-13 18:08:39,256 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr1REQUIRES_VIOLATION (16 of 28 remaining) [2021-11-13 18:08:39,256 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr2REQUIRES_VIOLATION (15 of 28 remaining) [2021-11-13 18:08:39,256 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr3REQUIRES_VIOLATION (14 of 28 remaining) [2021-11-13 18:08:39,257 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE (13 of 28 remaining) [2021-11-13 18:08:39,257 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE (12 of 28 remaining) [2021-11-13 18:08:39,257 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE (11 of 28 remaining) [2021-11-13 18:08:39,257 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE (10 of 28 remaining) [2021-11-13 18:08:39,257 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE (9 of 28 remaining) [2021-11-13 18:08:39,257 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE (8 of 28 remaining) [2021-11-13 18:08:39,257 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr0REQUIRES_VIOLATION (7 of 28 remaining) [2021-11-13 18:08:39,257 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr1REQUIRES_VIOLATION (6 of 28 remaining) [2021-11-13 18:08:39,257 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr2REQUIRES_VIOLATION (5 of 28 remaining) [2021-11-13 18:08:39,257 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr3REQUIRES_VIOLATION (4 of 28 remaining) [2021-11-13 18:08:39,258 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr0REQUIRES_VIOLATION (3 of 28 remaining) [2021-11-13 18:08:39,258 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr1REQUIRES_VIOLATION (2 of 28 remaining) [2021-11-13 18:08:39,258 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr2REQUIRES_VIOLATION (1 of 28 remaining) [2021-11-13 18:08:39,258 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr3REQUIRES_VIOLATION (0 of 28 remaining) [2021-11-13 18:08:39,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-13 18:08:39,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:08:39,467 INFO L732 BasicCegarLoop]: Path program histogram: [4, 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 18:08:39,469 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:08:39,471 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 06:08:39 BoogieIcfgContainer [2021-11-13 18:08:39,472 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 18:08:39,472 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 18:08:39,472 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 18:08:39,472 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 18:08:39,473 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:00:56" (3/4) ... [2021-11-13 18:08:39,475 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-13 18:08:39,480 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-11-13 18:08:39,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-11-13 18:08:39,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-11-13 18:08:39,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_get_data_at [2021-11-13 18:08:39,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-11-13 18:08:39,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-11-13 18:08:39,481 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_create [2021-11-13 18:08:39,482 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_destroy [2021-11-13 18:08:39,482 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-11-13 18:08:39,482 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_update_at [2021-11-13 18:08:39,482 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-11-13 18:08:39,488 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2021-11-13 18:08:39,489 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-13 18:08:39,489 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-13 18:08:39,490 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-13 18:08:39,532 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/witness.graphml [2021-11-13 18:08:39,532 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 18:08:39,533 INFO L158 Benchmark]: Toolchain (without parser) took 464620.54ms. Allocated memory was 130.0MB in the beginning and 167.8MB in the end (delta: 37.7MB). Free memory was 94.0MB in the beginning and 109.2MB in the end (delta: -15.2MB). Peak memory consumption was 24.6MB. Max. memory is 16.1GB. [2021-11-13 18:08:39,533 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 83.9MB. Free memory was 58.4MB in the beginning and 58.4MB in the end (delta: 27.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:08:39,533 INFO L158 Benchmark]: CACSL2BoogieTranslator took 553.76ms. Allocated memory is still 130.0MB. Free memory was 94.0MB in the beginning and 97.5MB in the end (delta: -3.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 18:08:39,533 INFO L158 Benchmark]: Boogie Preprocessor took 75.48ms. Allocated memory is still 130.0MB. Free memory was 97.5MB in the beginning and 94.6MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:08:39,534 INFO L158 Benchmark]: RCFGBuilder took 750.51ms. Allocated memory is still 130.0MB. Free memory was 94.6MB in the beginning and 71.1MB in the end (delta: 23.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2021-11-13 18:08:39,534 INFO L158 Benchmark]: TraceAbstraction took 463172.81ms. Allocated memory was 130.0MB in the beginning and 167.8MB in the end (delta: 37.7MB). Free memory was 70.2MB in the beginning and 113.2MB in the end (delta: -42.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:08:39,534 INFO L158 Benchmark]: Witness Printer took 60.10ms. Allocated memory is still 167.8MB. Free memory was 113.2MB in the beginning and 109.2MB in the end (delta: 4.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-13 18:08:39,535 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 83.9MB. Free memory was 58.4MB in the beginning and 58.4MB in the end (delta: 27.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 553.76ms. Allocated memory is still 130.0MB. Free memory was 94.0MB in the beginning and 97.5MB in the end (delta: -3.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 75.48ms. Allocated memory is still 130.0MB. Free memory was 97.5MB in the beginning and 94.6MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 750.51ms. Allocated memory is still 130.0MB. Free memory was 94.6MB in the beginning and 71.1MB in the end (delta: 23.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 463172.81ms. Allocated memory was 130.0MB in the beginning and 167.8MB in the end (delta: 37.7MB). Free memory was 70.2MB in the beginning and 113.2MB in the end (delta: -42.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 60.10ms. Allocated memory is still 167.8MB. Free memory was 113.2MB in the beginning and 109.2MB in the end (delta: 4.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 637]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 620]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 615]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 615]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 618]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 618]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 597]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 597]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 599]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 599]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 588]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 588]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 608]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 608]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 611]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 611]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 114 locations, 28 error locations. Started 1 CEGAR loops. OverallTime: 463.0s, OverallIterations: 38, TraceHistogramMax: 3, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.1s, AutomataDifference: 135.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5519 SdHoareTripleChecker+Valid, 20425.35ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5458 mSDsluCounter, 16639 SdHoareTripleChecker+Invalid, 17307.23ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 7361 IncrementalHoareTripleChecker+Unchecked, 14216 mSDsCounter, 1180 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 30918 IncrementalHoareTripleChecker+Invalid, 39459 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1180 mSolverCounterUnsat, 2423 mSDtfsCounter, 30918 mSolverCounterSat, 269.61ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3676 GetRequests, 2307 SyntacticMatches, 70 SemanticMatches, 1299 ConstructedPredicates, 13 IntricatePredicates, 0 DeprecatedPredicates, 14359 ImplicationChecksByTransitivity, 401.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=189occurred in iteration=17, InterpolantAutomatonStates: 657, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 38 MinimizatonAttempts, 628 StatesRemovedByMinimization, 33 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 317.7s InterpolantComputationTime, 3924 NumberOfCodeBlocks, 3897 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 4346 ConstructedInterpolants, 340 QuantifiedInterpolants, 38833 SizeOfPredicates, 300 NumberOfNonLiveVariables, 8343 ConjunctsInSsa, 1142 ConjunctsInUnsatCore, 68 InterpolantComputations, 20 PerfectInterpolantSequences, 1196/1607 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 28 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-13 18:08:39,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ecc82527-9aef-47d0-9ada-6ab5c1f295fd/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE