./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:45:13,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:45:13,299 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:45:13,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:45:13,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:45:13,357 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:45:13,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:45:13,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:45:13,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:45:13,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:45:13,365 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:45:13,366 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:45:13,367 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:45:13,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:45:13,375 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:45:13,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:45:13,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:45:13,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:45:13,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:45:13,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:45:13,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:45:13,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:45:13,402 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:45:13,403 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:45:13,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:45:13,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:45:13,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:45:13,413 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:45:13,414 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:45:13,415 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:45:13,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:45:13,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:45:13,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:45:13,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:45:13,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:45:13,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:45:13,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:45:13,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:45:13,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:45:13,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:45:13,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:45:13,425 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:45:13,447 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:45:13,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:45:13,448 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:45:13,448 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:45:13,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:45:13,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:45:13,450 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:45:13,450 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:45:13,450 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:45:13,451 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:45:13,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:45:13,451 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:45:13,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:45:13,452 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:45:13,452 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:45:13,452 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:45:13,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:45:13,453 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:45:13,453 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:45:13,453 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:45:13,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:45:13,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:45:13,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:45:13,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:45:13,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:45:13,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:45:13,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:45:13,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:45:13,455 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:45:13,456 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_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 [2021-11-02 22:45:13,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:45:13,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:45:13,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:45:13,735 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:45:13,737 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:45:13,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2021-11-02 22:45:13,816 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/data/3873628d2/435fb6d0e29244be8e2e36455cc8c756/FLAG01de6e8b1 [2021-11-02 22:45:14,373 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:45:14,374 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2021-11-02 22:45:14,387 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/data/3873628d2/435fb6d0e29244be8e2e36455cc8c756/FLAG01de6e8b1 [2021-11-02 22:45:14,694 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/data/3873628d2/435fb6d0e29244be8e2e36455cc8c756 [2021-11-02 22:45:14,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:45:14,698 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:45:14,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:45:14,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:45:14,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:45:14,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:45:14" (1/1) ... [2021-11-02 22:45:14,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@115adde5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:45:14, skipping insertion in model container [2021-11-02 22:45:14,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:45:14" (1/1) ... [2021-11-02 22:45:14,723 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:45:14,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:45:15,160 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_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/sv-benchmarks/c/list-simple/sll2c_append_unequal.i[24587,24600] [2021-11-02 22:45:15,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:45:15,177 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:45:15,219 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_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/sv-benchmarks/c/list-simple/sll2c_append_unequal.i[24587,24600] [2021-11-02 22:45:15,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:45:15,250 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:45:15,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:45:15 WrapperNode [2021-11-02 22:45:15,250 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:45:15,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:45:15,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:45:15,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:45:15,269 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:45:15" (1/1) ... [2021-11-02 22:45:15,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:45:15" (1/1) ... [2021-11-02 22:45:15,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:45:15" (1/1) ... [2021-11-02 22:45:15,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:45:15" (1/1) ... [2021-11-02 22:45:15,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:45:15" (1/1) ... [2021-11-02 22:45:15,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:45:15" (1/1) ... [2021-11-02 22:45:15,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:45:15" (1/1) ... [2021-11-02 22:45:15,349 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:45:15,350 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:45:15,350 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:45:15,350 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:45:15,351 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:45:15" (1/1) ... [2021-11-02 22:45:15,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:45:15,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:45:15,403 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:45:15,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:45:15,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:45:15,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:45:15,444 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:45:15,444 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:45:15,444 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:45:15,444 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-02 22:45:15,445 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-02 22:45:15,445 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2021-11-02 22:45:15,445 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_destroy [2021-11-02 22:45:15,445 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_append [2021-11-02 22:45:15,445 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:45:15,445 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:45:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:45:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:45:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:45:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:45:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:45:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:45:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:45:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:45:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:45:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:45:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:45:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:45:15,448 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:45:15,448 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:45:15,448 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:45:15,448 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:45:15,448 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:45:15,448 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:45:15,449 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:45:15,449 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:45:15,449 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:45:15,449 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:45:15,449 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:45:15,449 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:45:15,450 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:45:15,450 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:45:15,450 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:45:15,450 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:45:15,450 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:45:15,450 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:45:15,451 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:45:15,451 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:45:15,451 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:45:15,451 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:45:15,451 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:45:15,452 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:45:15,452 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:45:15,452 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:45:15,452 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:45:15,452 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:45:15,452 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:45:15,453 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:45:15,453 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:45:15,453 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:45:15,453 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:45:15,453 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:45:15,453 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:45:15,454 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:45:15,454 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:45:15,454 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:45:15,454 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:45:15,454 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:45:15,454 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:45:15,455 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:45:15,455 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:45:15,455 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:45:15,455 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:45:15,455 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:45:15,455 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:45:15,456 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:45:15,456 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:45:15,456 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-02 22:45:15,456 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:45:15,456 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:45:15,456 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:45:15,457 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:45:15,457 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:45:15,457 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:45:15,457 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:45:15,457 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:45:15,457 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:45:15,458 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:45:15,458 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:45:15,458 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:45:15,458 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:45:15,458 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:45:15,458 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:45:15,459 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:45:15,459 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:45:15,459 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:45:15,459 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:45:15,459 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:45:15,460 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:45:15,460 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:45:15,460 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:45:15,460 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:45:15,460 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:45:15,460 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:45:15,461 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:45:15,461 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:45:15,461 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:45:15,461 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:45:15,461 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:45:15,461 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:45:15,462 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:45:15,462 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:45:15,462 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:45:15,462 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:45:15,462 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:45:15,463 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:45:15,463 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:45:15,463 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:45:15,463 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:45:15,463 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:45:15,463 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:45:15,464 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:45:15,464 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:45:15,464 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:45:15,464 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:45:15,464 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-02 22:45:15,464 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-02 22:45:15,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:45:15,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:45:15,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:45:15,465 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2021-11-02 22:45:15,465 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_destroy [2021-11-02 22:45:15,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:45:15,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:45:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_append [2021-11-02 22:45:15,477 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:45:15,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 22:45:15,477 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:45:15,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:45:15,477 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:45:15,477 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:45:15,843 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-02 22:45:16,214 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:45:16,214 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-02 22:45:16,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:45:16 BoogieIcfgContainer [2021-11-02 22:45:16,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:45:16,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:45:16,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:45:16,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:45:16,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:45:14" (1/3) ... [2021-11-02 22:45:16,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295221e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:45:16, skipping insertion in model container [2021-11-02 22:45:16,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:45:15" (2/3) ... [2021-11-02 22:45:16,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@295221e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:45:16, skipping insertion in model container [2021-11-02 22:45:16,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:45:16" (3/3) ... [2021-11-02 22:45:16,226 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_append_unequal.i [2021-11-02 22:45:16,232 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:45:16,232 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 58 error locations. [2021-11-02 22:45:16,281 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:45:16,288 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:45:16,288 INFO L340 AbstractCegarLoop]: Starting to check reachability of 58 error locations. [2021-11-02 22:45:16,309 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 133 states have internal predecessors, (149), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-02 22:45:16,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 22:45:16,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:45:16,320 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:45:16,321 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:45:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:16,329 INFO L85 PathProgramCache]: Analyzing trace with hash 949209812, now seen corresponding path program 1 times [2021-11-02 22:45:16,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:16,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114148027] [2021-11-02 22:45:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:16,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:16,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:16,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:45:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:45:16,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:16,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114148027] [2021-11-02 22:45:16,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114148027] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:45:16,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:45:16,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:45:16,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196648271] [2021-11-02 22:45:16,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:45:16,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:16,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:45:16,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:45:16,622 INFO L87 Difference]: Start difference. First operand has 149 states, 75 states have (on average 1.9866666666666666) internal successors, (149), 133 states have internal predecessors, (149), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 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) [2021-11-02 22:45:16,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:16,966 INFO L93 Difference]: Finished difference Result 166 states and 178 transitions. [2021-11-02 22:45:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:45:16,968 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 [2021-11-02 22:45:16,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:16,984 INFO L225 Difference]: With dead ends: 166 [2021-11-02 22:45:16,985 INFO L226 Difference]: Without dead ends: 160 [2021-11-02 22:45:16,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:45:17,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-02 22:45:17,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 141. [2021-11-02 22:45:17,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 72 states have (on average 1.8888888888888888) internal successors, (136), 127 states have internal predecessors, (136), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:45:17,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 151 transitions. [2021-11-02 22:45:17,061 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 151 transitions. Word has length 12 [2021-11-02 22:45:17,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:17,062 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 151 transitions. [2021-11-02 22:45:17,063 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) [2021-11-02 22:45:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 151 transitions. [2021-11-02 22:45:17,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 22:45:17,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:45:17,064 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:45:17,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:45:17,065 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:45:17,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:17,069 INFO L85 PathProgramCache]: Analyzing trace with hash 949209813, now seen corresponding path program 1 times [2021-11-02 22:45:17,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:17,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415797932] [2021-11-02 22:45:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:17,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:17,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:45:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:17,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:45:17,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:17,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415797932] [2021-11-02 22:45:17,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415797932] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:45:17,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:45:17,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:45:17,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415596486] [2021-11-02 22:45:17,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:45:17,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:17,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:45:17,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:45:17,223 INFO L87 Difference]: Start difference. First operand 141 states and 151 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) [2021-11-02 22:45:17,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:17,519 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2021-11-02 22:45:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:45:17,519 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 [2021-11-02 22:45:17,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:17,525 INFO L225 Difference]: With dead ends: 158 [2021-11-02 22:45:17,525 INFO L226 Difference]: Without dead ends: 158 [2021-11-02 22:45:17,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:45:17,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-02 22:45:17,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2021-11-02 22:45:17,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 72 states have (on average 1.8611111111111112) internal successors, (134), 125 states have internal predecessors, (134), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:45:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 149 transitions. [2021-11-02 22:45:17,559 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 149 transitions. Word has length 12 [2021-11-02 22:45:17,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:17,560 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 149 transitions. [2021-11-02 22:45:17,560 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) [2021-11-02 22:45:17,560 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 149 transitions. [2021-11-02 22:45:17,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:45:17,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:45:17,562 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:45:17,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:45:17,563 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:45:17,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:17,565 INFO L85 PathProgramCache]: Analyzing trace with hash 878510510, now seen corresponding path program 1 times [2021-11-02 22:45:17,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:17,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345604351] [2021-11-02 22:45:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:17,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:17,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:45:17,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:17,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-02 22:45:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:45:17,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:17,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345604351] [2021-11-02 22:45:17,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345604351] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:45:17,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:45:17,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:45:17,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246904244] [2021-11-02 22:45:17,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:45:17,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:17,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:45:17,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:45:17,723 INFO L87 Difference]: Start difference. First operand 139 states and 149 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) [2021-11-02 22:45:18,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:18,157 INFO L93 Difference]: Finished difference Result 165 states and 177 transitions. [2021-11-02 22:45:18,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:45:18,157 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 [2021-11-02 22:45:18,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:18,159 INFO L225 Difference]: With dead ends: 165 [2021-11-02 22:45:18,159 INFO L226 Difference]: Without dead ends: 165 [2021-11-02 22:45:18,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:45:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-02 22:45:18,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 140. [2021-11-02 22:45:18,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 73 states have (on average 1.8493150684931507) internal successors, (135), 126 states have internal predecessors, (135), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:45:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 150 transitions. [2021-11-02 22:45:18,169 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 150 transitions. Word has length 19 [2021-11-02 22:45:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:18,170 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 150 transitions. [2021-11-02 22:45:18,170 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) [2021-11-02 22:45:18,171 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 150 transitions. [2021-11-02 22:45:18,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:45:18,172 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:45:18,172 INFO L513 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] [2021-11-02 22:45:18,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:45:18,172 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_circular_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:45:18,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:18,173 INFO L85 PathProgramCache]: Analyzing trace with hash -197187980, now seen corresponding path program 1 times [2021-11-02 22:45:18,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:18,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906933265] [2021-11-02 22:45:18,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:18,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:18,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:45:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:18,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-02 22:45:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:18,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-02 22:45:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:45:18,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:18,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906933265] [2021-11-02 22:45:18,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906933265] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:45:18,373 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:45:18,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:45:18,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827900631] [2021-11-02 22:45:18,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:45:18,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:18,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:45:18,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:45:18,375 INFO L87 Difference]: Start difference. First operand 140 states and 150 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) [2021-11-02 22:45:18,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:18,867 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2021-11-02 22:45:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:45:18,868 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 [2021-11-02 22:45:18,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:18,869 INFO L225 Difference]: With dead ends: 159 [2021-11-02 22:45:18,870 INFO L226 Difference]: Without dead ends: 159 [2021-11-02 22:45:18,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:45:18,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-02 22:45:18,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 139. [2021-11-02 22:45:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 73 states have (on average 1.8356164383561644) internal successors, (134), 125 states have internal predecessors, (134), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:45:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 149 transitions. [2021-11-02 22:45:18,882 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 149 transitions. Word has length 28 [2021-11-02 22:45:18,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:18,883 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 149 transitions. [2021-11-02 22:45:18,883 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) [2021-11-02 22:45:18,883 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 149 transitions. [2021-11-02 22:45:18,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:45:18,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:45:18,885 INFO L513 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] [2021-11-02 22:45:18,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:45:18,885 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_circular_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:45:18,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:18,886 INFO L85 PathProgramCache]: Analyzing trace with hash -197187981, now seen corresponding path program 1 times [2021-11-02 22:45:18,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:18,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498308589] [2021-11-02 22:45:18,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:18,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:18,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:45:18,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:18,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-02 22:45:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:18,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-02 22:45:18,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:45:18,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:18,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498308589] [2021-11-02 22:45:18,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498308589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:45:18,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:45:18,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:45:18,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579929858] [2021-11-02 22:45:18,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:45:18,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:18,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:45:18,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:45:18,998 INFO L87 Difference]: Start difference. First operand 139 states and 149 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) [2021-11-02 22:45:19,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:19,465 INFO L93 Difference]: Finished difference Result 158 states and 170 transitions. [2021-11-02 22:45:19,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:45:19,466 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 [2021-11-02 22:45:19,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:19,468 INFO L225 Difference]: With dead ends: 158 [2021-11-02 22:45:19,468 INFO L226 Difference]: Without dead ends: 158 [2021-11-02 22:45:19,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:45:19,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-02 22:45:19,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 138. [2021-11-02 22:45:19,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 73 states have (on average 1.821917808219178) internal successors, (133), 124 states have internal predecessors, (133), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:45:19,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 148 transitions. [2021-11-02 22:45:19,475 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 148 transitions. Word has length 28 [2021-11-02 22:45:19,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:19,476 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 148 transitions. [2021-11-02 22:45:19,476 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) [2021-11-02 22:45:19,476 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 148 transitions. [2021-11-02 22:45:19,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 22:45:19,478 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:45:19,478 INFO L513 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] [2021-11-02 22:45:19,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:45:19,479 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:45:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:19,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1088312348, now seen corresponding path program 1 times [2021-11-02 22:45:19,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:19,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521001404] [2021-11-02 22:45:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:19,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:19,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:45:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:19,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-02 22:45:19,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:19,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-02 22:45:19,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:19,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:45:19,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:19,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521001404] [2021-11-02 22:45:19,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521001404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:45:19,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007889863] [2021-11-02 22:45:19,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:19,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:45:19,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:45:19,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:45:19,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:45:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:19,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:45:19,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:45:19,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:45:20,123 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:45:20,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-02 22:45:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:45:20,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007889863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:45:20,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:45:20,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 14 [2021-11-02 22:45:20,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875405312] [2021-11-02 22:45:20,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:45:20,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:20,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:45:20,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:45:20,217 INFO L87 Difference]: Start difference. First operand 138 states and 148 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:45:20,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:20,596 INFO L93 Difference]: Finished difference Result 158 states and 170 transitions. [2021-11-02 22:45:20,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:45:20,597 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2021-11-02 22:45:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:20,598 INFO L225 Difference]: With dead ends: 158 [2021-11-02 22:45:20,598 INFO L226 Difference]: Without dead ends: 158 [2021-11-02 22:45:20,599 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:45:20,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-02 22:45:20,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 137. [2021-11-02 22:45:20,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 73 states have (on average 1.8082191780821917) internal successors, (132), 123 states have internal predecessors, (132), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:45:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 147 transitions. [2021-11-02 22:45:20,605 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 147 transitions. Word has length 31 [2021-11-02 22:45:20,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:20,605 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 147 transitions. [2021-11-02 22:45:20,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-02 22:45:20,606 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 147 transitions. [2021-11-02 22:45:20,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 22:45:20,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:45:20,607 INFO L513 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] [2021-11-02 22:45:20,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:45:20,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-02 22:45:20,825 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting sll_circular_createErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:45:20,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:20,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1088312349, now seen corresponding path program 1 times [2021-11-02 22:45:20,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:20,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195442584] [2021-11-02 22:45:20,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:20,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:20,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:45:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:20,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-02 22:45:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:21,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-02 22:45:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 22:45:21,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:21,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195442584] [2021-11-02 22:45:21,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195442584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:45:21,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928857677] [2021-11-02 22:45:21,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:21,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:45:21,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:45:21,101 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:45:21,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:45:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:21,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 22:45:21,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:45:21,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:45:21,633 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-02 22:45:21,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 9 [2021-11-02 22:45:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:45:21,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928857677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:45:21,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:45:21,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-02 22:45:21,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000992531] [2021-11-02 22:45:21,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:45:21,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:21,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:45:21,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:45:21,718 INFO L87 Difference]: Start difference. First operand 137 states and 147 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 8 states have internal predecessors, (29), 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) [2021-11-02 22:45:22,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:22,474 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2021-11-02 22:45:22,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:45:22,474 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 8 states have internal predecessors, (29), 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 [2021-11-02 22:45:22,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:22,476 INFO L225 Difference]: With dead ends: 156 [2021-11-02 22:45:22,476 INFO L226 Difference]: Without dead ends: 156 [2021-11-02 22:45:22,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:45:22,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-02 22:45:22,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 136. [2021-11-02 22:45:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 73 states have (on average 1.7945205479452055) internal successors, (131), 122 states have internal predecessors, (131), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:45:22,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2021-11-02 22:45:22,481 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 31 [2021-11-02 22:45:22,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:22,482 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2021-11-02 22:45:22,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 8 states have internal predecessors, (29), 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) [2021-11-02 22:45:22,482 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2021-11-02 22:45:22,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 22:45:22,484 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:45:22,484 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:45:22,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:45:22,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 22:45:22,685 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting sll_circular_appendErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:45:22,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:22,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1780221095, now seen corresponding path program 1 times [2021-11-02 22:45:22,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:22,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802194839] [2021-11-02 22:45:22,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:22,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:22,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:45:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:22,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:45:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:23,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:45:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:23,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:45:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:23,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-02 22:45:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:45:23,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:23,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802194839] [2021-11-02 22:45:23,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802194839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:45:23,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965043436] [2021-11-02 22:45:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:23,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:45:23,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:45:23,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:45:23,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:45:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:23,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 22:45:23,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:45:23,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:45:23,933 INFO L354 Elim1Store]: treesize reduction 50, result has 9.1 percent of original size [2021-11-02 22:45:23,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 19 [2021-11-02 22:45:24,055 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:45:24,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-02 22:45:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:45:24,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965043436] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:45:24,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:45:24,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-11-02 22:45:24,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074085161] [2021-11-02 22:45:24,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 22:45:24,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:24,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 22:45:24,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:45:24,074 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand has 24 states, 22 states have (on average 2.409090909090909) internal successors, (53), 19 states have internal predecessors, (53), 7 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:45:25,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:25,815 INFO L93 Difference]: Finished difference Result 233 states and 256 transitions. [2021-11-02 22:45:25,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:45:25,815 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.409090909090909) internal successors, (53), 19 states have internal predecessors, (53), 7 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 47 [2021-11-02 22:45:25,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:25,817 INFO L225 Difference]: With dead ends: 233 [2021-11-02 22:45:25,817 INFO L226 Difference]: Without dead ends: 233 [2021-11-02 22:45:25,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:45:25,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-11-02 22:45:25,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2021-11-02 22:45:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 100 states have (on average 1.7) internal successors, (170), 142 states have internal predecessors, (170), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:45:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 192 transitions. [2021-11-02 22:45:25,826 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 192 transitions. Word has length 47 [2021-11-02 22:45:25,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:25,827 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 192 transitions. [2021-11-02 22:45:25,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.409090909090909) internal successors, (53), 19 states have internal predecessors, (53), 7 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:45:25,827 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 192 transitions. [2021-11-02 22:45:25,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 22:45:25,829 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:45:25,829 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:45:25,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:45:26,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:45:26,041 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_circular_appendErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:45:26,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:26,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1780221096, now seen corresponding path program 1 times [2021-11-02 22:45:26,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:26,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28174863] [2021-11-02 22:45:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:26,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:26,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:45:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:26,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:45:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:26,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:45:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:26,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:45:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:26,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-02 22:45:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:45:26,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:26,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28174863] [2021-11-02 22:45:26,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28174863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:45:26,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007648453] [2021-11-02 22:45:26,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:26,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:45:26,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:45:26,689 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:45:26,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:45:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:26,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 22:45:26,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:45:26,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:45:26,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-02 22:45:27,459 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-02 22:45:27,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-11-02 22:45:27,757 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-02 22:45:27,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 31 [2021-11-02 22:45:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 22:45:27,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007648453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:45:27,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:45:27,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-11-02 22:45:27,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454812167] [2021-11-02 22:45:27,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 22:45:27,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:27,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 22:45:27,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:45:27,879 INFO L87 Difference]: Start difference. First operand 161 states and 192 transitions. Second operand has 22 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-02 22:45:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:29,592 INFO L93 Difference]: Finished difference Result 269 states and 293 transitions. [2021-11-02 22:45:29,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:45:29,593 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 47 [2021-11-02 22:45:29,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:29,595 INFO L225 Difference]: With dead ends: 269 [2021-11-02 22:45:29,595 INFO L226 Difference]: Without dead ends: 269 [2021-11-02 22:45:29,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:45:29,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-02 22:45:29,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 178. [2021-11-02 22:45:29,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 117 states have (on average 1.6752136752136753) internal successors, (196), 159 states have internal predecessors, (196), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:45:29,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 218 transitions. [2021-11-02 22:45:29,605 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 218 transitions. Word has length 47 [2021-11-02 22:45:29,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:29,605 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 218 transitions. [2021-11-02 22:45:29,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-02 22:45:29,606 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 218 transitions. [2021-11-02 22:45:29,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 22:45:29,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:45:29,608 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:45:29,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:45:29,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:45:29,821 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_circular_appendErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:45:29,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:29,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1395488744, now seen corresponding path program 1 times [2021-11-02 22:45:29,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:29,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555899275] [2021-11-02 22:45:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:29,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:29,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:45:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:29,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:45:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:29,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:45:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:29,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:45:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:29,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-02 22:45:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:29,954 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-02 22:45:29,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:29,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555899275] [2021-11-02 22:45:29,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555899275] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:45:29,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:45:29,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:45:29,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460316008] [2021-11-02 22:45:29,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:45:29,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:29,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:45:29,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:45:29,958 INFO L87 Difference]: Start difference. First operand 178 states and 218 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-02 22:45:30,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:30,381 INFO L93 Difference]: Finished difference Result 195 states and 234 transitions. [2021-11-02 22:45:30,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:45:30,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2021-11-02 22:45:30,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:30,385 INFO L225 Difference]: With dead ends: 195 [2021-11-02 22:45:30,385 INFO L226 Difference]: Without dead ends: 195 [2021-11-02 22:45:30,385 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:45:30,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-02 22:45:30,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 176. [2021-11-02 22:45:30,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 117 states have (on average 1.641025641025641) internal successors, (192), 157 states have internal predecessors, (192), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:45:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 214 transitions. [2021-11-02 22:45:30,398 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 214 transitions. Word has length 49 [2021-11-02 22:45:30,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:30,398 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 214 transitions. [2021-11-02 22:45:30,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-02 22:45:30,399 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 214 transitions. [2021-11-02 22:45:30,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 22:45:30,406 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:45:30,406 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:45:30,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:45:30,407 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sll_circular_appendErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:45:30,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:30,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1395488745, now seen corresponding path program 1 times [2021-11-02 22:45:30,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:30,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263543743] [2021-11-02 22:45:30,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:30,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:30,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:30,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:45:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:30,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:45:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:30,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:45:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:30,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:45:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:30,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-02 22:45:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:45:30,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:30,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263543743] [2021-11-02 22:45:30,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263543743] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:45:30,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:45:30,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:45:30,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14048504] [2021-11-02 22:45:30,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:45:30,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:30,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:45:30,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:45:30,584 INFO L87 Difference]: Start difference. First operand 176 states and 214 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-02 22:45:31,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:45:31,031 INFO L93 Difference]: Finished difference Result 193 states and 230 transitions. [2021-11-02 22:45:31,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:45:31,032 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2021-11-02 22:45:31,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:45:31,033 INFO L225 Difference]: With dead ends: 193 [2021-11-02 22:45:31,034 INFO L226 Difference]: Without dead ends: 193 [2021-11-02 22:45:31,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:45:31,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-02 22:45:31,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 174. [2021-11-02 22:45:31,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 117 states have (on average 1.606837606837607) internal successors, (188), 155 states have internal predecessors, (188), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:45:31,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 210 transitions. [2021-11-02 22:45:31,053 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 210 transitions. Word has length 49 [2021-11-02 22:45:31,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:45:31,054 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 210 transitions. [2021-11-02 22:45:31,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-02 22:45:31,054 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 210 transitions. [2021-11-02 22:45:31,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:45:31,055 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:45:31,055 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:45:31,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:45:31,055 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_circular_appendErr8REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:45:31,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:45:31,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1035133293, now seen corresponding path program 1 times [2021-11-02 22:45:31,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:45:31,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569154775] [2021-11-02 22:45:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:31,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:45:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:31,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:45:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:31,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:45:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:31,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:45:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:31,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:45:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:31,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-02 22:45:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:31,552 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-02 22:45:31,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:45:31,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569154775] [2021-11-02 22:45:31,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569154775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:45:31,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801052853] [2021-11-02 22:45:31,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:45:31,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:45:31,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:45:31,557 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:45:31,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:45:31,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:45:31,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 22:45:31,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:45:32,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:45:39,589 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-02 22:45:39,590 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 2 case distinctions, treesize of input 43 treesize of output 31 [2021-11-02 22:45:39,600 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-02 22:45:39,600 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 28 treesize of output 30 [2021-11-02 22:45:41,065 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:45:41,066 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 34 treesize of output 22 [2021-11-02 22:45:41,086 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 22:45:41,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801052853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:45:41,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:45:41,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [20] total 30 [2021-11-02 22:45:41,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672802902] [2021-11-02 22:45:41,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:45:41,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:45:41,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:45:41,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=842, Unknown=6, NotChecked=0, Total=930 [2021-11-02 22:45:41,089 INFO L87 Difference]: Start difference. First operand 174 states and 210 transitions. Second operand has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-02 22:46:13,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:46:13,254 INFO L93 Difference]: Finished difference Result 198 states and 234 transitions. [2021-11-02 22:46:13,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 22:46:13,255 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 51 [2021-11-02 22:46:13,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:46:13,256 INFO L225 Difference]: With dead ends: 198 [2021-11-02 22:46:13,256 INFO L226 Difference]: Without dead ends: 198 [2021-11-02 22:46:13,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=150, Invalid=1323, Unknown=9, NotChecked=0, Total=1482 [2021-11-02 22:46:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-02 22:46:13,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 174. [2021-11-02 22:46:13,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 119 states have (on average 1.5798319327731092) internal successors, (188), 155 states have internal predecessors, (188), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:46:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 210 transitions. [2021-11-02 22:46:13,265 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 210 transitions. Word has length 51 [2021-11-02 22:46:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:46:13,266 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 210 transitions. [2021-11-02 22:46:13,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-02 22:46:13,266 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 210 transitions. [2021-11-02 22:46:13,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:46:13,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:46:13,267 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:46:13,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:46:13,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-02 22:46:13,489 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_circular_appendErr9REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:46:13,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:46:13,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1035133294, now seen corresponding path program 1 times [2021-11-02 22:46:13,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:46:13,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899462297] [2021-11-02 22:46:13,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:13,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:46:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:13,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:46:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:13,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:46:13,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:13,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:46:13,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:13,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:46:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:13,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-02 22:46:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:46:14,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:46:14,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899462297] [2021-11-02 22:46:14,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899462297] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:14,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994223548] [2021-11-02 22:46:14,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:14,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:46:14,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:46:14,382 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:46:14,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:46:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:14,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-02 22:46:14,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:46:14,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:46:15,354 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 [2021-11-02 22:46:15,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:46:23,248 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-02 22:46:23,248 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 2 case distinctions, treesize of input 86 treesize of output 74 [2021-11-02 22:46:23,278 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-02 22:46:23,279 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 2 case distinctions, treesize of input 71 treesize of output 55 [2021-11-02 22:46:23,288 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-02 22:46:23,289 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 56 treesize of output 56 [2021-11-02 22:46:23,302 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-02 22:46:23,303 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 50 treesize of output 52 [2021-11-02 22:46:23,556 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:46:23,556 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 63 treesize of output 47 [2021-11-02 22:46:23,563 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:46:23,563 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-11-02 22:46:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:46:23,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994223548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:23,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:46:23,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2021-11-02 22:46:23,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607890598] [2021-11-02 22:46:23,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 22:46:23,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:46:23,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 22:46:23,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1158, Unknown=1, NotChecked=0, Total=1260 [2021-11-02 22:46:23,713 INFO L87 Difference]: Start difference. First operand 174 states and 210 transitions. Second operand has 36 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 7 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-02 22:46:36,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:46:36,929 INFO L93 Difference]: Finished difference Result 215 states and 252 transitions. [2021-11-02 22:46:36,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 22:46:36,930 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 7 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 51 [2021-11-02 22:46:36,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:46:36,932 INFO L225 Difference]: With dead ends: 215 [2021-11-02 22:46:36,932 INFO L226 Difference]: Without dead ends: 215 [2021-11-02 22:46:36,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=223, Invalid=2324, Unknown=3, NotChecked=0, Total=2550 [2021-11-02 22:46:36,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-02 22:46:36,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 182. [2021-11-02 22:46:36,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 127 states have (on average 1.5511811023622046) internal successors, (197), 163 states have internal predecessors, (197), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:46:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 219 transitions. [2021-11-02 22:46:36,942 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 219 transitions. Word has length 51 [2021-11-02 22:46:36,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:46:36,942 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 219 transitions. [2021-11-02 22:46:36,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 7 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-02 22:46:36,943 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 219 transitions. [2021-11-02 22:46:36,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:46:36,944 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:46:36,944 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:46:36,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:46:37,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 22:46:37,169 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_circular_appendErr8REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:46:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:46:37,169 INFO L85 PathProgramCache]: Analyzing trace with hash 797770178, now seen corresponding path program 1 times [2021-11-02 22:46:37,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:46:37,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043398163] [2021-11-02 22:46:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:37,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:46:37,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:37,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:46:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:37,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:46:37,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:37,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:46:37,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:37,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:46:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:38,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-02 22:46:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:38,627 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:46:38,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:46:38,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043398163] [2021-11-02 22:46:38,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043398163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:38,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162197608] [2021-11-02 22:46:38,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:46:38,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:46:38,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:46:38,634 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:46:38,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:46:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:46:38,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-02 22:46:38,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:46:39,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:46:39,293 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:46:39,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 22:46:39,414 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 [2021-11-02 22:46:39,588 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:46:39,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-11-02 22:46:40,336 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-02 22:46:40,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 38 [2021-11-02 22:46:40,344 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 25 [2021-11-02 22:46:45,045 INFO L354 Elim1Store]: treesize reduction 256, result has 10.2 percent of original size [2021-11-02 22:46:45,045 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 7 case distinctions, treesize of input 125 treesize of output 97 [2021-11-02 22:46:45,093 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-02 22:46:45,093 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 2 case distinctions, treesize of input 110 treesize of output 98 [2021-11-02 22:46:45,139 INFO L354 Elim1Store]: treesize reduction 92, result has 31.9 percent of original size [2021-11-02 22:46:45,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 118 [2021-11-02 22:46:45,581 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:46:45,581 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 123 treesize of output 111 [2021-11-02 22:46:46,431 INFO L354 Elim1Store]: treesize reduction 65, result has 5.8 percent of original size [2021-11-02 22:46:46,432 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 106 treesize of output 52 [2021-11-02 22:46:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:46:46,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162197608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:46:46,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:46:46,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 52 [2021-11-02 22:46:46,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739243871] [2021-11-02 22:46:46,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-02 22:46:46,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:46:46,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-02 22:46:46,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2599, Unknown=2, NotChecked=0, Total=2756 [2021-11-02 22:46:46,728 INFO L87 Difference]: Start difference. First operand 182 states and 219 transitions. Second operand has 53 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 42 states have internal predecessors, (82), 8 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-02 22:47:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:04,857 INFO L93 Difference]: Finished difference Result 216 states and 251 transitions. [2021-11-02 22:47:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 22:47:04,858 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 42 states have internal predecessors, (82), 8 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 56 [2021-11-02 22:47:04,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:04,860 INFO L225 Difference]: With dead ends: 216 [2021-11-02 22:47:04,860 INFO L226 Difference]: Without dead ends: 216 [2021-11-02 22:47:04,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=392, Invalid=5456, Unknown=4, NotChecked=0, Total=5852 [2021-11-02 22:47:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-02 22:47:04,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 184. [2021-11-02 22:47:04,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 129 states have (on average 1.550387596899225) internal successors, (200), 165 states have internal predecessors, (200), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:47:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 222 transitions. [2021-11-02 22:47:04,871 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 222 transitions. Word has length 56 [2021-11-02 22:47:04,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:04,872 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 222 transitions. [2021-11-02 22:47:04,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 42 states have internal predecessors, (82), 8 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-02 22:47:04,872 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 222 transitions. [2021-11-02 22:47:04,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 22:47:04,873 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:04,874 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:47:04,905 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-02 22:47:05,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:47:05,089 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_circular_appendErr9REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:47:05,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:05,089 INFO L85 PathProgramCache]: Analyzing trace with hash 797770179, now seen corresponding path program 1 times [2021-11-02 22:47:05,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:05,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474205038] [2021-11-02 22:47:05,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:05,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:05,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:47:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:05,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:47:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:05,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:47:05,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:06,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:47:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:06,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-02 22:47:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:47:07,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:07,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474205038] [2021-11-02 22:47:07,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474205038] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:47:07,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420888076] [2021-11-02 22:47:07,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:07,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:47:07,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:47:07,025 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:47:07,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:47:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:07,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-02 22:47:07,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:47:07,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:47:07,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:47:08,060 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-02 22:47:08,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-02 22:47:08,100 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:47:08,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 22:47:08,309 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 [2021-11-02 22:47:08,328 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 [2021-11-02 22:47:08,653 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-02 22:47:08,653 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 72 treesize of output 50 [2021-11-02 22:47:08,668 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:47:08,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 59 [2021-11-02 22:47:09,764 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-02 22:47:09,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 66 [2021-11-02 22:47:09,779 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-11-02 22:47:09,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 49 [2021-11-02 22:47:09,790 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:47:09,790 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 46 treesize of output 42 [2021-11-02 22:47:09,800 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:47:09,800 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 36 treesize of output 32 [2021-11-02 22:47:18,375 INFO L354 Elim1Store]: treesize reduction 248, result has 10.5 percent of original size [2021-11-02 22:47:18,376 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 7 case distinctions, treesize of input 185 treesize of output 125 [2021-11-02 22:47:18,437 INFO L354 Elim1Store]: treesize reduction 356, result has 10.3 percent of original size [2021-11-02 22:47:18,438 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 3 new quantified variables, introduced 7 case distinctions, treesize of input 170 treesize of output 152 [2021-11-02 22:47:18,454 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-02 22:47:18,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 157 [2021-11-02 22:47:18,476 INFO L354 Elim1Store]: treesize reduction 84, result has 21.5 percent of original size [2021-11-02 22:47:18,477 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 148 treesize of output 153 [2021-11-02 22:47:20,278 INFO L354 Elim1Store]: treesize reduction 113, result has 6.6 percent of original size [2021-11-02 22:47:20,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 184 treesize of output 105 [2021-11-02 22:47:20,306 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-11-02 22:47:20,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 87 treesize of output 61 [2021-11-02 22:47:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:47:20,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420888076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:47:20,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:47:20,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 59 [2021-11-02 22:47:20,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604905320] [2021-11-02 22:47:20,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-02 22:47:20,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:20,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-02 22:47:20,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3373, Unknown=4, NotChecked=0, Total=3540 [2021-11-02 22:47:20,644 INFO L87 Difference]: Start difference. First operand 184 states and 222 transitions. Second operand has 60 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 48 states have internal predecessors, (87), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:47:57,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:57,097 INFO L93 Difference]: Finished difference Result 218 states and 254 transitions. [2021-11-02 22:47:57,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:47:57,098 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 48 states have internal predecessors, (87), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 56 [2021-11-02 22:47:57,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:57,100 INFO L225 Difference]: With dead ends: 218 [2021-11-02 22:47:57,100 INFO L226 Difference]: Without dead ends: 218 [2021-11-02 22:47:57,103 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=380, Invalid=6420, Unknown=6, NotChecked=0, Total=6806 [2021-11-02 22:47:57,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-02 22:47:57,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 187. [2021-11-02 22:47:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 132 states have (on average 1.5378787878787878) internal successors, (203), 168 states have internal predecessors, (203), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-02 22:47:57,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 225 transitions. [2021-11-02 22:47:57,114 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 225 transitions. Word has length 56 [2021-11-02 22:47:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:57,114 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 225 transitions. [2021-11-02 22:47:57,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 48 states have internal predecessors, (87), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:47:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 225 transitions. [2021-11-02 22:47:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 22:47:57,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:57,117 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:47:57,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:47:57,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:47:57,325 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr4REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:47:57,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:57,325 INFO L85 PathProgramCache]: Analyzing trace with hash 2073062655, now seen corresponding path program 1 times [2021-11-02 22:47:57,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:57,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186162514] [2021-11-02 22:47:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:57,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:57,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:57,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:47:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:57,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:47:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:57,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:47:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:57,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:47:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:57,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-02 22:47:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:57,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:47:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-02 22:47:57,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:57,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186162514] [2021-11-02 22:47:57,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186162514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:57,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:57,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-02 22:47:57,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412793095] [2021-11-02 22:47:57,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:47:57,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:57,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:47:57,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:47:57,642 INFO L87 Difference]: Start difference. First operand 187 states and 225 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-02 22:47:58,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:47:58,535 INFO L93 Difference]: Finished difference Result 267 states and 326 transitions. [2021-11-02 22:47:58,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:47:58,537 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2021-11-02 22:47:58,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:47:58,540 INFO L225 Difference]: With dead ends: 267 [2021-11-02 22:47:58,540 INFO L226 Difference]: Without dead ends: 267 [2021-11-02 22:47:58,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:47:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-02 22:47:58,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 200. [2021-11-02 22:47:58,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 144 states have (on average 1.5138888888888888) internal successors, (218), 179 states have internal predecessors, (218), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-02 22:47:58,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 242 transitions. [2021-11-02 22:47:58,552 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 242 transitions. Word has length 57 [2021-11-02 22:47:58,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:47:58,552 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 242 transitions. [2021-11-02 22:47:58,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-02 22:47:58,553 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 242 transitions. [2021-11-02 22:47:58,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-02 22:47:58,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:47:58,555 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:47:58,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:47:58,555 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr5REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:47:58,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:47:58,556 INFO L85 PathProgramCache]: Analyzing trace with hash 2073062656, now seen corresponding path program 1 times [2021-11-02 22:47:58,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:47:58,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000501411] [2021-11-02 22:47:58,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:47:58,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:47:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:58,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:47:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:58,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:47:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:58,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:47:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:58,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:47:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:58,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-02 22:47:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:58,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:47:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:47:58,930 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:47:58,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:47:58,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000501411] [2021-11-02 22:47:58,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000501411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:47:58,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:47:58,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-02 22:47:58,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740197829] [2021-11-02 22:47:58,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:47:58,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:47:58,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:47:58,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:47:58,932 INFO L87 Difference]: Start difference. First operand 200 states and 242 transitions. Second operand has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-02 22:48:00,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:00,163 INFO L93 Difference]: Finished difference Result 305 states and 379 transitions. [2021-11-02 22:48:00,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:48:00,163 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 57 [2021-11-02 22:48:00,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:00,166 INFO L225 Difference]: With dead ends: 305 [2021-11-02 22:48:00,166 INFO L226 Difference]: Without dead ends: 305 [2021-11-02 22:48:00,167 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:48:00,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-11-02 22:48:00,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 206. [2021-11-02 22:48:00,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 150 states have (on average 1.5) internal successors, (225), 185 states have internal predecessors, (225), 11 states have call successors, (11), 7 states have call predecessors, (11), 9 states have return successors, (13), 13 states have call predecessors, (13), 10 states have call successors, (13) [2021-11-02 22:48:00,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 249 transitions. [2021-11-02 22:48:00,178 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 249 transitions. Word has length 57 [2021-11-02 22:48:00,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:00,178 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 249 transitions. [2021-11-02 22:48:00,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-02 22:48:00,179 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 249 transitions. [2021-11-02 22:48:00,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-02 22:48:00,180 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:00,180 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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] [2021-11-02 22:48:00,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:48:00,181 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_circular_appendErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:48:00,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:00,181 INFO L85 PathProgramCache]: Analyzing trace with hash -224229867, now seen corresponding path program 2 times [2021-11-02 22:48:00,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:00,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731344196] [2021-11-02 22:48:00,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:00,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:00,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:48:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:00,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:48:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:00,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:48:00,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:00,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:48:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:00,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-02 22:48:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:00,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-02 22:48:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-02 22:48:00,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:00,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731344196] [2021-11-02 22:48:00,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731344196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:00,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143412860] [2021-11-02 22:48:00,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:48:00,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:00,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:00,371 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:00,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:48:00,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:48:00,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:00,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:48:00,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:01,121 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 22:48:01,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143412860] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:01,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:01,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-11-02 22:48:01,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219286071] [2021-11-02 22:48:01,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:48:01,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:01,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:48:01,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:48:01,123 INFO L87 Difference]: Start difference. First operand 206 states and 249 transitions. Second operand has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 7 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-02 22:48:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:01,526 INFO L93 Difference]: Finished difference Result 159 states and 174 transitions. [2021-11-02 22:48:01,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:48:01,527 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 7 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 59 [2021-11-02 22:48:01,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:01,528 INFO L225 Difference]: With dead ends: 159 [2021-11-02 22:48:01,529 INFO L226 Difference]: Without dead ends: 150 [2021-11-02 22:48:01,529 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:48:01,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-02 22:48:01,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 131. [2021-11-02 22:48:01,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 92 states have (on average 1.3804347826086956) internal successors, (127), 116 states have internal predecessors, (127), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-02 22:48:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2021-11-02 22:48:01,535 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 59 [2021-11-02 22:48:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:01,536 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2021-11-02 22:48:01,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 7 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-02 22:48:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2021-11-02 22:48:01,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 22:48:01,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:01,538 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:01,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:48:01,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 22:48:01,761 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr10REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:48:01,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:01,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1274881561, now seen corresponding path program 1 times [2021-11-02 22:48:01,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:01,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974492481] [2021-11-02 22:48:01,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:01,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:01,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:48:01,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:01,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:48:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:01,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:48:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:01,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:48:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:01,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-02 22:48:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:01,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:48:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 22:48:01,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:01,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974492481] [2021-11-02 22:48:01,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974492481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:01,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:01,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:48:01,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031966223] [2021-11-02 22:48:01,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:48:01,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:01,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:48:01,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:48:01,930 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand has 9 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-02 22:48:02,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:02,627 INFO L93 Difference]: Finished difference Result 176 states and 189 transitions. [2021-11-02 22:48:02,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:48:02,628 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 60 [2021-11-02 22:48:02,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:02,630 INFO L225 Difference]: With dead ends: 176 [2021-11-02 22:48:02,630 INFO L226 Difference]: Without dead ends: 176 [2021-11-02 22:48:02,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:48:02,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-02 22:48:02,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 131. [2021-11-02 22:48:02,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 93 states have (on average 1.3763440860215055) internal successors, (128), 116 states have internal predecessors, (128), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-02 22:48:02,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2021-11-02 22:48:02,638 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 60 [2021-11-02 22:48:02,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:02,638 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2021-11-02 22:48:02,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-02 22:48:02,639 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2021-11-02 22:48:02,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 22:48:02,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:02,640 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:48:02,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:48:02,640 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr11REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:48:02,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:02,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1274881562, now seen corresponding path program 1 times [2021-11-02 22:48:02,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:02,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327925176] [2021-11-02 22:48:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:02,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:02,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:48:02,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:02,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:48:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:02,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:48:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:02,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:48:02,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:02,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-02 22:48:02,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:03,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:48:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:03,204 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:48:03,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:03,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327925176] [2021-11-02 22:48:03,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327925176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:48:03,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:48:03,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-02 22:48:03,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030870560] [2021-11-02 22:48:03,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:48:03,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:03,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:48:03,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:48:03,206 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-02 22:48:04,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:48:04,233 INFO L93 Difference]: Finished difference Result 189 states and 209 transitions. [2021-11-02 22:48:04,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:48:04,233 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2021-11-02 22:48:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:48:04,235 INFO L225 Difference]: With dead ends: 189 [2021-11-02 22:48:04,235 INFO L226 Difference]: Without dead ends: 189 [2021-11-02 22:48:04,235 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:48:04,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-02 22:48:04,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 139. [2021-11-02 22:48:04,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 101 states have (on average 1.396039603960396) internal successors, (141), 124 states have internal predecessors, (141), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-02 22:48:04,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 157 transitions. [2021-11-02 22:48:04,242 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 157 transitions. Word has length 60 [2021-11-02 22:48:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:48:04,242 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 157 transitions. [2021-11-02 22:48:04,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 12 states have internal predecessors, (41), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-02 22:48:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 157 transitions. [2021-11-02 22:48:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 22:48:04,244 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:48:04,244 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:48:04,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:48:04,244 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sll_circular_appendErr8REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:48:04,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:48:04,245 INFO L85 PathProgramCache]: Analyzing trace with hash -2112696691, now seen corresponding path program 2 times [2021-11-02 22:48:04,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:48:04,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085201216] [2021-11-02 22:48:04,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:48:04,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:48:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:04,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:48:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:04,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:48:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:05,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:48:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:05,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:48:05,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:05,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-02 22:48:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:48:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:48:06,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:48:06,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085201216] [2021-11-02 22:48:06,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085201216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:06,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495589792] [2021-11-02 22:48:06,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:48:06,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:48:06,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:48:06,288 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:48:06,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:48:06,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:48:06,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:48:06,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-02 22:48:06,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:48:06,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:48:07,253 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:48:07,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 22:48:07,397 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 [2021-11-02 22:48:07,402 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 [2021-11-02 22:48:07,634 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-02 22:48:07,635 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 [2021-11-02 22:48:07,649 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:48:07,649 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 [2021-11-02 22:48:10,913 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.base Int)) (and (= (store |c_old(#valid)| node_create_~temp~0.base 1) |c_#valid|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base (store (store (select |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base) 0 0) 4 (select (select |c_#memory_$Pointer$.offset| node_create_~temp~0.base) 4)))) (= (select |c_old(#valid)| node_create_~temp~0.base) 0) (= (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) 0 0) 4 (select (select |c_#memory_$Pointer$.base| node_create_~temp~0.base) 4))) |c_#memory_$Pointer$.base|))) is different from true [2021-11-02 22:48:11,091 INFO L354 Elim1Store]: treesize reduction 68, result has 27.7 percent of original size [2021-11-02 22:48:11,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 150 treesize of output 110 [2021-11-02 22:48:11,172 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-02 22:48:11,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 114 treesize of output 129 [2021-11-02 22:48:11,247 INFO L354 Elim1Store]: treesize reduction 88, result has 25.4 percent of original size [2021-11-02 22:48:11,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 118 [2021-11-02 22:48:18,759 INFO L354 Elim1Store]: treesize reduction 126, result has 2.3 percent of original size [2021-11-02 22:48:18,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 146 treesize of output 108 [2021-11-02 22:48:20,184 INFO L354 Elim1Store]: treesize reduction 122, result has 13.5 percent of original size [2021-11-02 22:48:20,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 73 [2021-11-02 22:48:20,732 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-02 22:48:20,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495589792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:48:20,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:48:20,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 63 [2021-11-02 22:48:20,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964763156] [2021-11-02 22:48:20,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-02 22:48:20,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:48:20,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-02 22:48:20,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3715, Unknown=1, NotChecked=122, Total=4032 [2021-11-02 22:48:20,735 INFO L87 Difference]: Start difference. First operand 139 states and 157 transitions. Second operand has 64 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 53 states have internal predecessors, (91), 8 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-02 22:49:13,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:49:13,225 INFO L93 Difference]: Finished difference Result 174 states and 194 transitions. [2021-11-02 22:49:13,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 22:49:13,226 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 53 states have internal predecessors, (91), 8 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 61 [2021-11-02 22:49:13,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:49:13,228 INFO L225 Difference]: With dead ends: 174 [2021-11-02 22:49:13,228 INFO L226 Difference]: Without dead ends: 174 [2021-11-02 22:49:13,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 94 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1821 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=574, Invalid=8358, Unknown=2, NotChecked=186, Total=9120 [2021-11-02 22:49:13,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-02 22:49:13,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 141. [2021-11-02 22:49:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 103 states have (on average 1.3980582524271845) internal successors, (144), 126 states have internal predecessors, (144), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-02 22:49:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2021-11-02 22:49:13,240 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 61 [2021-11-02 22:49:13,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:49:13,240 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2021-11-02 22:49:13,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 57 states have (on average 1.5964912280701755) internal successors, (91), 53 states have internal predecessors, (91), 8 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-02 22:49:13,241 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2021-11-02 22:49:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-02 22:49:13,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:49:13,242 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-02 22:49:13,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:49:13,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:49:13,465 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting sll_circular_appendErr9REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:49:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:49:13,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2112696690, now seen corresponding path program 2 times [2021-11-02 22:49:13,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:49:13,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453142808] [2021-11-02 22:49:13,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:49:13,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:49:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:14,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:49:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:14,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:49:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:15,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:49:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:15,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:49:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:16,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-02 22:49:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:49:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:49:17,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:49:17,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453142808] [2021-11-02 22:49:17,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453142808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:17,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111912238] [2021-11-02 22:49:17,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:49:17,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:49:17,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:49:17,076 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:49:17,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:49:17,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:49:17,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:49:17,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-02 22:49:17,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:49:18,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-02 22:49:18,695 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:49:18,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-02 22:49:19,036 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 [2021-11-02 22:49:19,056 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 [2021-11-02 22:49:19,553 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-02 22:49:19,553 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 64 treesize of output 46 [2021-11-02 22:49:19,586 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-02 22:49:19,586 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 56 treesize of output 50 [2021-11-02 22:49:21,227 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-02 22:49:21,228 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 6 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 56 [2021-11-02 22:49:21,242 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-02 22:49:21,243 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 40 treesize of output 31 [2021-11-02 22:49:28,368 INFO L354 Elim1Store]: treesize reduction 364, result has 10.1 percent of original size [2021-11-02 22:49:28,368 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 7 case distinctions, treesize of input 150 treesize of output 139 [2021-11-02 22:49:28,524 INFO L354 Elim1Store]: treesize reduction 256, result has 10.2 percent of original size [2021-11-02 22:49:28,525 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 6 new quantified variables, introduced 7 case distinctions, treesize of input 135 treesize of output 94 [2021-11-02 22:49:28,568 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-02 22:49:28,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 120 treesize of output 122 [2021-11-02 22:49:31,385 INFO L354 Elim1Store]: treesize reduction 182, result has 5.7 percent of original size [2021-11-02 22:49:31,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 189 treesize of output 114 [2021-11-02 22:49:31,471 INFO L354 Elim1Store]: treesize reduction 162, result has 4.1 percent of original size [2021-11-02 22:49:31,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 55 [2021-11-02 22:49:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:49:31,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111912238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:49:31,683 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:49:31,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 56 [2021-11-02 22:49:31,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022733492] [2021-11-02 22:49:31,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-02 22:49:31,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:49:31,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-02 22:49:31,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2913, Unknown=3, NotChecked=0, Total=3080 [2021-11-02 22:49:31,687 INFO L87 Difference]: Start difference. First operand 141 states and 160 transitions. Second operand has 56 states, 50 states have (on average 1.76) internal successors, (88), 45 states have internal predecessors, (88), 8 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-02 22:50:01,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:01,860 INFO L93 Difference]: Finished difference Result 148 states and 165 transitions. [2021-11-02 22:50:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:50:01,861 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 50 states have (on average 1.76) internal successors, (88), 45 states have internal predecessors, (88), 8 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 61 [2021-11-02 22:50:01,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:01,862 INFO L225 Difference]: With dead ends: 148 [2021-11-02 22:50:01,862 INFO L226 Difference]: Without dead ends: 148 [2021-11-02 22:50:01,864 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=367, Invalid=5789, Unknown=6, NotChecked=0, Total=6162 [2021-11-02 22:50:01,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-02 22:50:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 128. [2021-11-02 22:50:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 94 states have (on average 1.3617021276595744) internal successors, (128), 113 states have internal predecessors, (128), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-02 22:50:01,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 144 transitions. [2021-11-02 22:50:01,871 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 144 transitions. Word has length 61 [2021-11-02 22:50:01,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:01,871 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 144 transitions. [2021-11-02 22:50:01,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 50 states have (on average 1.76) internal successors, (88), 45 states have internal predecessors, (88), 8 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-02 22:50:01,872 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 144 transitions. [2021-11-02 22:50:01,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:50:01,873 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:01,873 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:01,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:50:02,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 22:50:02,080 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr4REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:50:02,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:02,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1095554464, now seen corresponding path program 1 times [2021-11-02 22:50:02,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:02,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787201478] [2021-11-02 22:50:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:02,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:02,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:50:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:02,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:50:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:02,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:50:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:02,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:50:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:03,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-02 22:50:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:04,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:50:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:50:04,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:04,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787201478] [2021-11-02 22:50:04,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787201478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:04,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372466803] [2021-11-02 22:50:04,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:04,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:04,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:50:04,725 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:50:04,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:50:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:05,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 22:50:05,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:50:06,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:50:06,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-02 22:50:06,590 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:50:06,591 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 37 treesize of output 36 [2021-11-02 22:50:06,623 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-02 22:50:06,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-02 22:50:07,918 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-11-02 22:50:07,919 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 69 treesize of output 48 [2021-11-02 22:50:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-02 22:50:08,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372466803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:50:08,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:50:08,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [27] total 40 [2021-11-02 22:50:08,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77672329] [2021-11-02 22:50:08,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:50:08,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:08,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:50:08,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 22:50:08,161 INFO L87 Difference]: Start difference. First operand 128 states and 144 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-02 22:50:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:09,132 INFO L93 Difference]: Finished difference Result 140 states and 155 transitions. [2021-11-02 22:50:09,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:50:09,133 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 62 [2021-11-02 22:50:09,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:09,134 INFO L225 Difference]: With dead ends: 140 [2021-11-02 22:50:09,134 INFO L226 Difference]: Without dead ends: 140 [2021-11-02 22:50:09,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=121, Invalid=1685, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 22:50:09,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-02 22:50:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 122. [2021-11-02 22:50:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 88 states have (on average 1.3295454545454546) internal successors, (117), 107 states have internal predecessors, (117), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2021-11-02 22:50:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 133 transitions. [2021-11-02 22:50:09,141 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 133 transitions. Word has length 62 [2021-11-02 22:50:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:09,142 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 133 transitions. [2021-11-02 22:50:09,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 3 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-02 22:50:09,142 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 133 transitions. [2021-11-02 22:50:09,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-02 22:50:09,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:09,144 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:09,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:50:09,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:09,358 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr18ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:50:09,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:09,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1095503930, now seen corresponding path program 1 times [2021-11-02 22:50:09,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:09,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159086785] [2021-11-02 22:50:09,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:09,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:09,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:50:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:09,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:50:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:09,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:50:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:09,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:50:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:10,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-02 22:50:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:10,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:50:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:50:11,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:11,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159086785] [2021-11-02 22:50:11,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159086785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:11,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968640528] [2021-11-02 22:50:11,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:11,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:11,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:50:11,076 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:50:11,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:50:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:11,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 22:50:11,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:50:12,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-02 22:50:14,800 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (let ((.cse0 (+ node_create_~temp~0.offset 4))) (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) node_create_~temp~0.offset 0) .cse0 (select (select |c_#memory_$Pointer$.base| node_create_~temp~0.base) .cse0))))))) is different from true [2021-11-02 22:50:27,003 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int) (v_DerPreprocessor_1 Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= (select (select (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) node_create_~temp~0.offset 0) (+ node_create_~temp~0.offset 4) v_DerPreprocessor_1)) |c_sll_circular_append_#in~head.base|) |c_sll_circular_append_#in~head.offset|) |c_sll_circular_append_#t~mem12.base|))) is different from true [2021-11-02 22:50:29,029 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int) (v_DerPreprocessor_1 Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= (select (select (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) node_create_~temp~0.offset 0) (+ node_create_~temp~0.offset 4) v_DerPreprocessor_1)) |c_sll_circular_append_#in~head.base|) |c_sll_circular_append_#in~head.offset|) 0))) is different from true [2021-11-02 22:50:29,148 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2021-11-02 22:50:29,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968640528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:29,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:50:29,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 32 [2021-11-02 22:50:29,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222779920] [2021-11-02 22:50:29,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 22:50:29,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:50:29,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 22:50:29,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=725, Unknown=8, NotChecked=168, Total=992 [2021-11-02 22:50:29,151 INFO L87 Difference]: Start difference. First operand 122 states and 133 transitions. Second operand has 32 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 7 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:50:56,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:50:56,277 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2021-11-02 22:50:56,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:50:56,278 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 7 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 62 [2021-11-02 22:50:56,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:50:56,280 INFO L225 Difference]: With dead ends: 131 [2021-11-02 22:50:56,280 INFO L226 Difference]: Without dead ends: 127 [2021-11-02 22:50:56,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=168, Invalid=1472, Unknown=12, NotChecked=240, Total=1892 [2021-11-02 22:50:56,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-02 22:50:56,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 108. [2021-11-02 22:50:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 75 states have (on average 1.36) internal successors, (102), 94 states have internal predecessors, (102), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-02 22:50:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2021-11-02 22:50:56,287 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 62 [2021-11-02 22:50:56,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:50:56,288 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2021-11-02 22:50:56,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 states have internal predecessors, (67), 7 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-02 22:50:56,289 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2021-11-02 22:50:56,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-02 22:50:56,289 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:50:56,290 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:50:56,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:50:56,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 22:50:56,505 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr4REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 54 more)] === [2021-11-02 22:50:56,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:50:56,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1024890923, now seen corresponding path program 1 times [2021-11-02 22:50:56,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:50:56,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79578744] [2021-11-02 22:50:56,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:56,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:50:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:56,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:50:56,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:56,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-02 22:50:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:57,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:50:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:57,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-02 22:50:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:57,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-02 22:50:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:59,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-02 22:50:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:50:59,763 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 22:50:59,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:50:59,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79578744] [2021-11-02 22:50:59,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79578744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:50:59,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103882921] [2021-11-02 22:50:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:50:59,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:50:59,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:50:59,771 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:50:59,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef089fbe-cc8f-45b7-9d52-a92864f4a56b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:51:00,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:51:00,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-02 22:51:00,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:51:02,274 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 22 treesize of output 14 [2021-11-02 22:51:02,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-02 22:51:35,853 INFO L354 Elim1Store]: treesize reduction 834, result has 20.6 percent of original size [2021-11-02 22:51:35,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 840 treesize of output 432 [2021-11-02 22:51:35,940 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-02 22:51:35,941 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 447 treesize of output 455 [2021-11-02 22:54:35,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:54:35,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:54:37,037 INFO L354 Elim1Store]: treesize reduction 24, result has 91.6 percent of original size [2021-11-02 22:54:37,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 499 treesize of output 687