./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:46:11,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:46:11,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:46:11,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:46:11,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:46:11,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:46:11,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:46:11,289 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:46:11,291 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:46:11,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:46:11,294 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:46:11,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:46:11,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:46:11,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:46:11,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:46:11,305 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:46:11,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:46:11,318 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:46:11,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:46:11,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:46:11,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:46:11,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:46:11,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:46:11,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:46:11,346 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:46:11,353 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:46:11,353 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:46:11,355 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:46:11,357 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:46:11,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:46:11,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:46:11,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:46:11,364 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:46:11,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:46:11,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:46:11,369 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:46:11,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:46:11,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:46:11,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:46:11,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:46:11,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:46:11,374 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-13 17:46:11,443 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:46:11,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:46:11,447 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:46:11,448 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:46:11,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:46:11,456 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:46:11,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:46:11,458 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:46:11,458 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:46:11,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:46:11,460 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:46:11,460 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 17:46:11,460 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:46:11,461 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:46:11,461 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:46:11,461 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 17:46:11,461 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 17:46:11,462 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 17:46:11,462 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:46:11,462 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 17:46:11,463 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:46:11,463 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:46:11,463 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:46:11,464 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:46:11,464 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:46:11,464 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:46:11,465 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:46:11,465 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:46:11,465 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:46:11,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:46:11,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:46:11,468 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_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 [2021-11-13 17:46:11,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:46:11,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:46:11,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:46:11,803 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:46:11,803 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:46:11,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/list-simple/sll2c_remove_all.i [2021-11-13 17:46:11,895 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/data/dd3004d49/09230b85d6054d4eacc8f83d2830e2d0/FLAG9c0d93238 [2021-11-13 17:46:12,522 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:46:12,522 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/sv-benchmarks/c/list-simple/sll2c_remove_all.i [2021-11-13 17:46:12,547 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/data/dd3004d49/09230b85d6054d4eacc8f83d2830e2d0/FLAG9c0d93238 [2021-11-13 17:46:12,819 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/data/dd3004d49/09230b85d6054d4eacc8f83d2830e2d0 [2021-11-13 17:46:12,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:46:12,822 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-13 17:46:12,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:46:12,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:46:12,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:46:12,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:46:12" (1/1) ... [2021-11-13 17:46:12,830 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ff11218 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:12, skipping insertion in model container [2021-11-13 17:46:12,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:46:12" (1/1) ... [2021-11-13 17:46:12,837 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:46:12,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:46:13,186 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_177f6e4e-cfb3-4fe5-9da6-56897a065325/sv-benchmarks/c/list-simple/sll2c_remove_all.i[24082,24095] [2021-11-13 17:46:13,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:46:13,196 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:46:13,245 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_177f6e4e-cfb3-4fe5-9da6-56897a065325/sv-benchmarks/c/list-simple/sll2c_remove_all.i[24082,24095] [2021-11-13 17:46:13,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:46:13,281 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:46:13,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:13 WrapperNode [2021-11-13 17:46:13,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:46:13,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:46:13,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:46:13,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:46:13,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:13" (1/1) ... [2021-11-13 17:46:13,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:13" (1/1) ... [2021-11-13 17:46:13,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:13" (1/1) ... [2021-11-13 17:46:13,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:13" (1/1) ... [2021-11-13 17:46:13,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:13" (1/1) ... [2021-11-13 17:46:13,347 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:13" (1/1) ... [2021-11-13 17:46:13,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:13" (1/1) ... [2021-11-13 17:46:13,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:46:13,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:46:13,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:46:13,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:46:13,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:13" (1/1) ... [2021-11-13 17:46:13,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:46:13,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:46:13,425 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:46:13,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:46:13,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-13 17:46:13,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:46:13,475 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-13 17:46:13,476 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-13 17:46:13,477 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-13 17:46:13,477 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-13 17:46:13,477 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-13 17:46:13,479 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2021-11-13 17:46:13,479 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_remove_first [2021-11-13 17:46:13,480 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-13 17:46:13,480 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-13 17:46:13,480 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-13 17:46:13,480 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-13 17:46:13,480 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-13 17:46:13,481 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-13 17:46:13,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:46:13,481 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-13 17:46:13,481 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-13 17:46:13,481 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-13 17:46:13,482 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-13 17:46:13,482 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-13 17:46:13,482 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-13 17:46:13,482 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-13 17:46:13,482 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-13 17:46:13,482 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-13 17:46:13,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-13 17:46:13,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-13 17:46:13,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-13 17:46:13,483 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-13 17:46:13,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-13 17:46:13,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-13 17:46:13,484 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-13 17:46:13,484 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-13 17:46:13,484 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-13 17:46:13,484 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-13 17:46:13,485 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-13 17:46:13,485 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-13 17:46:13,485 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-13 17:46:13,485 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-13 17:46:13,485 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-13 17:46:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-13 17:46:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-13 17:46:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-13 17:46:13,486 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-13 17:46:13,487 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-13 17:46:13,487 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-13 17:46:13,487 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-13 17:46:13,488 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-13 17:46:13,488 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-13 17:46:13,489 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-13 17:46:13,489 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-13 17:46:13,489 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-13 17:46:13,489 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-13 17:46:13,489 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-13 17:46:13,489 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-13 17:46:13,490 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-13 17:46:13,490 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-13 17:46:13,490 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-13 17:46:13,491 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-13 17:46:13,491 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-13 17:46:13,491 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-13 17:46:13,491 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-13 17:46:13,492 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-13 17:46:13,492 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-13 17:46:13,493 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-13 17:46:13,493 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-13 17:46:13,494 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-13 17:46:13,495 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-13 17:46:13,495 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-13 17:46:13,495 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-13 17:46:13,495 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-13 17:46:13,495 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-13 17:46:13,495 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-13 17:46:13,496 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-13 17:46:13,496 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-13 17:46:13,496 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-13 17:46:13,496 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-13 17:46:13,496 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-13 17:46:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-13 17:46:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-13 17:46:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-13 17:46:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-13 17:46:13,497 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-13 17:46:13,498 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-13 17:46:13,498 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-13 17:46:13,499 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-13 17:46:13,499 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-13 17:46:13,499 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-13 17:46:13,499 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-13 17:46:13,499 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-13 17:46:13,500 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-13 17:46:13,500 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-13 17:46:13,500 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-13 17:46:13,500 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-13 17:46:13,500 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-13 17:46:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-13 17:46:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-13 17:46:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-13 17:46:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-13 17:46:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-13 17:46:13,501 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-13 17:46:13,502 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-13 17:46:13,502 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-13 17:46:13,502 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-13 17:46:13,502 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-13 17:46:13,503 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-13 17:46:13,503 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-13 17:46:13,503 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-13 17:46:13,503 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-13 17:46:13,503 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-13 17:46:13,504 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-13 17:46:13,504 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-13 17:46:13,504 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-13 17:46:13,504 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-13 17:46:13,504 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-13 17:46:13,504 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-13 17:46:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-13 17:46:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-13 17:46:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-13 17:46:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-13 17:46:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-13 17:46:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-13 17:46:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 17:46:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 17:46:13,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 17:46:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2021-11-13 17:46:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_remove_first [2021-11-13 17:46:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 17:46:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 17:46:13,511 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-13 17:46:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 17:46:13,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-13 17:46:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:46:13,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:46:13,516 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 17:46:13,815 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-13 17:46:14,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:46:14,211 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 17:46:14,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:46:14 BoogieIcfgContainer [2021-11-13 17:46:14,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:46:14,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:46:14,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:46:14,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:46:14,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:46:12" (1/3) ... [2021-11-13 17:46:14,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1a6651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:46:14, skipping insertion in model container [2021-11-13 17:46:14,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:46:13" (2/3) ... [2021-11-13 17:46:14,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d1a6651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:46:14, skipping insertion in model container [2021-11-13 17:46:14,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:46:14" (3/3) ... [2021-11-13 17:46:14,223 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all.i [2021-11-13 17:46:14,229 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:46:14,229 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2021-11-13 17:46:14,283 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:46:14,291 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 17:46:14,291 INFO L340 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2021-11-13 17:46:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 95 states have internal predecessors, (104), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 17:46:14,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 17:46:14,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:14,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:14,323 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:14,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:14,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1395759788, now seen corresponding path program 1 times [2021-11-13 17:46:14,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:14,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792858929] [2021-11-13 17:46:14,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:14,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:14,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:14,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:14,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792858929] [2021-11-13 17:46:14,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792858929] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:14,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:14,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:46:14,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302255782] [2021-11-13 17:46:14,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:14,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:14,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:14,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:14,625 INFO L87 Difference]: Start difference. First operand has 108 states, 53 states have (on average 1.9622641509433962) internal successors, (104), 95 states have internal predecessors, (104), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:46:14,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:14,901 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2021-11-13 17:46:14,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:14,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-13 17:46:14,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:14,915 INFO L225 Difference]: With dead ends: 106 [2021-11-13 17:46:14,915 INFO L226 Difference]: Without dead ends: 100 [2021-11-13 17:46:14,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:14,922 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 58 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 186.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.73ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 227.69ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:14,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 103 Invalid, 170 Unknown, 0 Unchecked, 7.73ms Time], IncrementalHoareTripleChecker [7 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 227.69ms Time] [2021-11-13 17:46:14,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-13 17:46:14,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-11-13 17:46:14,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 50 states have (on average 1.86) internal successors, (93), 89 states have internal predecessors, (93), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 17:46:14,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-11-13 17:46:14,985 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 12 [2021-11-13 17:46:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:14,986 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-11-13 17:46:14,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:46:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-11-13 17:46:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 17:46:14,987 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:14,988 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:14,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:46:14,989 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:14,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1395759787, now seen corresponding path program 1 times [2021-11-13 17:46:14,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:14,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842537439] [2021-11-13 17:46:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:14,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:15,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:15,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:15,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:15,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:15,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842537439] [2021-11-13 17:46:15,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842537439] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:15,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:15,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:46:15,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491139962] [2021-11-13 17:46:15,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:15,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:46:15,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:15,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:46:15,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:15,134 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:46:15,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:15,338 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2021-11-13 17:46:15,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:46:15,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-13 17:46:15,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:15,344 INFO L225 Difference]: With dead ends: 98 [2021-11-13 17:46:15,344 INFO L226 Difference]: Without dead ends: 98 [2021-11-13 17:46:15,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:46:15,351 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 53 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 151.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.98ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 184.08ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:15,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 95 Invalid, 156 Unknown, 0 Unchecked, 6.98ms Time], IncrementalHoareTripleChecker [6 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 184.08ms Time] [2021-11-13 17:46:15,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-13 17:46:15,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-13 17:46:15,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 50 states have (on average 1.82) internal successors, (91), 87 states have internal predecessors, (91), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 17:46:15,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-11-13 17:46:15,381 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 12 [2021-11-13 17:46:15,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:15,383 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-11-13 17:46:15,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:46:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-11-13 17:46:15,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-13 17:46:15,384 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:15,384 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:15,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:46:15,385 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:15,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:15,387 INFO L85 PathProgramCache]: Analyzing trace with hash -799936565, now seen corresponding path program 1 times [2021-11-13 17:46:15,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:15,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956307748] [2021-11-13 17:46:15,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:15,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:15,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:15,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:46:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:15,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:15,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956307748] [2021-11-13 17:46:15,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956307748] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:15,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:15,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:46:15,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470138840] [2021-11-13 17:46:15,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:15,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:46:15,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:15,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:46:15,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:46:15,650 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 17:46:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:16,059 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2021-11-13 17:46:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:46:16,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-11-13 17:46:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:16,064 INFO L225 Difference]: With dead ends: 105 [2021-11-13 17:46:16,065 INFO L226 Difference]: Without dead ends: 105 [2021-11-13 17:46:16,065 INFO L932 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 [2021-11-13 17:46:16,074 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 123 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 220.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.02ms SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 273.62ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:16,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 183 Invalid, 315 Unknown, 0 Unchecked, 9.02ms Time], IncrementalHoareTripleChecker [17 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 273.62ms Time] [2021-11-13 17:46:16,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-13 17:46:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2021-11-13 17:46:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 51 states have (on average 1.803921568627451) internal successors, (92), 88 states have internal predecessors, (92), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 17:46:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2021-11-13 17:46:16,091 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 19 [2021-11-13 17:46:16,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:16,091 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2021-11-13 17:46:16,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-13 17:46:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2021-11-13 17:46:16,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 17:46:16,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:16,093 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:16,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:46:16,093 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_circular_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:16,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:16,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1837051173, now seen corresponding path program 1 times [2021-11-13 17:46:16,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:16,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167392063] [2021-11-13 17:46:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:16,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:16,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:16,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:46:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:16,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:46:16,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:16,315 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 17:46:16,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:16,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167392063] [2021-11-13 17:46:16,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167392063] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:16,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:16,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:46:16,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408209956] [2021-11-13 17:46:16,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:16,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:46:16,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:16,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:46:16,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:46:16,320 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:46:16,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:16,740 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-11-13 17:46:16,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:46:16,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-13 17:46:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:16,744 INFO L225 Difference]: With dead ends: 99 [2021-11-13 17:46:16,744 INFO L226 Difference]: Without dead ends: 99 [2021-11-13 17:46:16,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:46:16,745 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 101 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 293.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.80ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 361.75ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:16,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 171 Invalid, 444 Unknown, 0 Unchecked, 6.80ms Time], IncrementalHoareTripleChecker [11 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 361.75ms Time] [2021-11-13 17:46:16,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-13 17:46:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-11-13 17:46:16,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 87 states have internal predecessors, (91), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 17:46:16,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 102 transitions. [2021-11-13 17:46:16,754 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 102 transitions. Word has length 28 [2021-11-13 17:46:16,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:16,755 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 102 transitions. [2021-11-13 17:46:16,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:46:16,756 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 102 transitions. [2021-11-13 17:46:16,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 17:46:16,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:16,757 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:16,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 17:46:16,757 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_circular_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:16,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:16,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1837051174, now seen corresponding path program 1 times [2021-11-13 17:46:16,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:16,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316760494] [2021-11-13 17:46:16,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:16,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:16,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:16,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:16,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:46:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:16,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:46:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:16,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:46:16,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:16,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316760494] [2021-11-13 17:46:16,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316760494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:16,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:16,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:46:16,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119466996] [2021-11-13 17:46:16,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:16,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:46:16,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:16,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:46:16,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:46:16,920 INFO L87 Difference]: Start difference. First operand 98 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:46:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:17,273 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-11-13 17:46:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:46:17,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-11-13 17:46:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:17,275 INFO L225 Difference]: With dead ends: 98 [2021-11-13 17:46:17,275 INFO L226 Difference]: Without dead ends: 98 [2021-11-13 17:46:17,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:46:17,277 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 99 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 254.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.34ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 304.80ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:17,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 179 Invalid, 429 Unknown, 0 Unchecked, 5.34ms Time], IncrementalHoareTripleChecker [10 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 304.80ms Time] [2021-11-13 17:46:17,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-13 17:46:17,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-11-13 17:46:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 86 states have internal predecessors, (90), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 17:46:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2021-11-13 17:46:17,284 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 28 [2021-11-13 17:46:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:17,285 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2021-11-13 17:46:17,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 17:46:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2021-11-13 17:46:17,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 17:46:17,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:17,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:17,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 17:46:17,287 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:17,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:17,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1118258617, now seen corresponding path program 1 times [2021-11-13 17:46:17,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:17,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127912121] [2021-11-13 17:46:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:17,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:17,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:17,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:46:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:17,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:46:17,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 17:46:17,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:17,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127912121] [2021-11-13 17:46:17,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127912121] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:46:17,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253376510] [2021-11-13 17:46:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:17,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:46:17,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:46:17,498 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:46:17,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:46:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:17,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 17:46:17,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:46:17,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 17:46:17,884 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-13 17:46:17,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-13 17:46:17,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:46:17,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:46:17,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253376510] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:17,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:46:17,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 14 [2021-11-13 17:46:17,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531822068] [2021-11-13 17:46:17,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:17,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 17:46:17,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:17,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 17:46:17,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:46:17,966 INFO L87 Difference]: Start difference. First operand 97 states and 101 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) [2021-11-13 17:46:18,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:18,247 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-11-13 17:46:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 17:46:18,248 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 [2021-11-13 17:46:18,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:18,249 INFO L225 Difference]: With dead ends: 98 [2021-11-13 17:46:18,249 INFO L226 Difference]: Without dead ends: 98 [2021-11-13 17:46:18,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-11-13 17:46:18,250 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 63 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 182.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.22ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 241.21ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:18,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 370 Invalid, 391 Unknown, 0 Unchecked, 5.22ms Time], IncrementalHoareTripleChecker [9 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 241.21ms Time] [2021-11-13 17:46:18,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-13 17:46:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-11-13 17:46:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 85 states have internal predecessors, (89), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 17:46:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-11-13 17:46:18,265 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 31 [2021-11-13 17:46:18,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:18,266 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-11-13 17:46:18,266 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) [2021-11-13 17:46:18,266 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-11-13 17:46:18,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 17:46:18,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:18,267 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:18,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-13 17:46:18,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:46:18,488 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting sll_circular_createErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:18,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1118258618, now seen corresponding path program 1 times [2021-11-13 17:46:18,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:18,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970109615] [2021-11-13 17:46:18,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:18,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:18,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:18,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:46:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:18,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:46:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 17:46:18,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:18,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970109615] [2021-11-13 17:46:18,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970109615] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:46:18,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027957593] [2021-11-13 17:46:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:18,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:46:18,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:46:18,731 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:46:18,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:46:18,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:18,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 17:46:18,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:46:18,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 17:46:19,238 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-13 17:46:19,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 9 [2021-11-13 17:46:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:46:19,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:46:19,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027957593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:46:19,508 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:46:19,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-13 17:46:19,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419537020] [2021-11-13 17:46:19,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:46:19,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 17:46:19,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:19,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 17:46:19,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:46:19,510 INFO L87 Difference]: Start difference. First operand 96 states and 100 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) [2021-11-13 17:46:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:20,143 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-11-13 17:46:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 17:46:20,144 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 [2021-11-13 17:46:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:20,145 INFO L225 Difference]: With dead ends: 96 [2021-11-13 17:46:20,146 INFO L226 Difference]: Without dead ends: 96 [2021-11-13 17:46:20,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-11-13 17:46:20,147 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 106 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 409.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.56ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 489.62ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:20,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 193 Invalid, 630 Unknown, 0 Unchecked, 7.56ms Time], IncrementalHoareTripleChecker [16 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 489.62ms Time] [2021-11-13 17:46:20,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-13 17:46:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-11-13 17:46:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 84 states have internal predecessors, (88), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 17:46:20,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-11-13 17:46:20,163 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 31 [2021-11-13 17:46:20,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:20,163 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-11-13 17:46:20,163 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) [2021-11-13 17:46:20,164 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-11-13 17:46:20,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-13 17:46:20,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:20,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:20,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:46:20,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:46:20,367 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:20,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:20,367 INFO L85 PathProgramCache]: Analyzing trace with hash 376686718, now seen corresponding path program 1 times [2021-11-13 17:46:20,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:20,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832462464] [2021-11-13 17:46:20,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:20,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:20,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:20,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:20,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:20,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:20,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 17:46:20,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:20,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832462464] [2021-11-13 17:46:20,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832462464] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:20,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:20,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 17:46:20,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912889251] [2021-11-13 17:46:20,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:20,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:46:20,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:20,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:46:20,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:46:20,558 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 17:46:20,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:20,839 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-11-13 17:46:20,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:46:20,840 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2021-11-13 17:46:20,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:20,841 INFO L225 Difference]: With dead ends: 98 [2021-11-13 17:46:20,841 INFO L226 Difference]: Without dead ends: 98 [2021-11-13 17:46:20,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:46:20,842 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 100 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 179.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.47ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 232.98ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:20,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 151 Invalid, 238 Unknown, 0 Unchecked, 8.47ms Time], IncrementalHoareTripleChecker [12 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 232.98ms Time] [2021-11-13 17:46:20,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-13 17:46:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2021-11-13 17:46:20,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 85 states have internal predecessors, (89), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-13 17:46:20,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2021-11-13 17:46:20,864 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 37 [2021-11-13 17:46:20,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:20,864 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2021-11-13 17:46:20,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 17:46:20,865 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2021-11-13 17:46:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 17:46:20,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:20,870 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:20,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 17:46:20,871 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_circular_remove_firstErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:20,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:20,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1218858003, now seen corresponding path program 1 times [2021-11-13 17:46:20,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:20,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503877106] [2021-11-13 17:46:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:20,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:20,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:21,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:21,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:21,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 17:46:21,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:21,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503877106] [2021-11-13 17:46:21,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503877106] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:46:21,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385548520] [2021-11-13 17:46:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:21,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:46:21,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:46:21,587 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:46:21,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:46:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:21,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-13 17:46:21,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:46:21,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 17:46:21,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-13 17:46:22,459 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-13 17:46:22,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 24 [2021-11-13 17:46:22,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:46:22,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:46:26,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385548520] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:46:26,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:46:26,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-11-13 17:46:26,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842753068] [2021-11-13 17:46:26,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:46:26,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 17:46:26,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:26,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 17:46:26,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=469, Unknown=2, NotChecked=0, Total=552 [2021-11-13 17:46:26,906 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand has 23 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-13 17:46:27,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:27,682 INFO L93 Difference]: Finished difference Result 155 states and 164 transitions. [2021-11-13 17:46:27,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 17:46:27,683 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 39 [2021-11-13 17:46:27,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:27,685 INFO L225 Difference]: With dead ends: 155 [2021-11-13 17:46:27,685 INFO L226 Difference]: Without dead ends: 155 [2021-11-13 17:46:27,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=139, Invalid=789, Unknown=2, NotChecked=0, Total=930 [2021-11-13 17:46:27,687 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 166 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 421.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.74ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 437 IncrementalHoareTripleChecker+Unchecked, 507.46ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:27,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 493 Invalid, 1019 Unknown, 0 Unchecked, 8.74ms Time], IncrementalHoareTripleChecker [26 Valid, 556 Invalid, 0 Unknown, 437 Unchecked, 507.46ms Time] [2021-11-13 17:46:27,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-13 17:46:27,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 117. [2021-11-13 17:46:27,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.5277777777777777) internal successors, (110), 102 states have internal predecessors, (110), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-13 17:46:27,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 128 transitions. [2021-11-13 17:46:27,695 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 128 transitions. Word has length 39 [2021-11-13 17:46:27,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:27,696 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 128 transitions. [2021-11-13 17:46:27,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 18 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-13 17:46:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 128 transitions. [2021-11-13 17:46:27,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 17:46:27,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:27,698 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:27,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:46:27,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:46:27,914 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_circular_remove_firstErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:27,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:27,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1218858004, now seen corresponding path program 1 times [2021-11-13 17:46:27,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:27,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496635069] [2021-11-13 17:46:27,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:27,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:28,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:28,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:28,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:28,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:28,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:28,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 17:46:28,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:28,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496635069] [2021-11-13 17:46:28,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496635069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:46:28,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105212664] [2021-11-13 17:46:28,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:28,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:46:28,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:46:28,540 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:46:28,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:46:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:28,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 17:46:28,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:46:28,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 17:46:28,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-13 17:46:29,339 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-13 17:46:29,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-11-13 17:46:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 17:46:29,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:46:31,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105212664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:46:31,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:46:31,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-11-13 17:46:31,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674389036] [2021-11-13 17:46:31,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:46:31,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 17:46:31,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:31,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 17:46:31,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=420, Unknown=1, NotChecked=0, Total=506 [2021-11-13 17:46:31,870 INFO L87 Difference]: Start difference. First operand 117 states and 128 transitions. Second operand has 19 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-13 17:46:32,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:32,444 INFO L93 Difference]: Finished difference Result 154 states and 163 transitions. [2021-11-13 17:46:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 17:46:32,445 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 39 [2021-11-13 17:46:32,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:32,447 INFO L225 Difference]: With dead ends: 154 [2021-11-13 17:46:32,447 INFO L226 Difference]: Without dead ends: 154 [2021-11-13 17:46:32,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=93, Invalid=458, Unknown=1, NotChecked=0, Total=552 [2021-11-13 17:46:32,448 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 189 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 416.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.34ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 309 IncrementalHoareTripleChecker+Unchecked, 499.85ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:32,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 282 Invalid, 865 Unknown, 0 Unchecked, 7.34ms Time], IncrementalHoareTripleChecker [24 Valid, 532 Invalid, 0 Unknown, 309 Unchecked, 499.85ms Time] [2021-11-13 17:46:32,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-13 17:46:32,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 117. [2021-11-13 17:46:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.5138888888888888) internal successors, (109), 102 states have internal predecessors, (109), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-13 17:46:32,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2021-11-13 17:46:32,460 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 39 [2021-11-13 17:46:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:32,461 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2021-11-13 17:46:32,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-13 17:46:32,461 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2021-11-13 17:46:32,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-13 17:46:32,464 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:32,464 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:32,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:46:32,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:46:32,690 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sll_circular_remove_firstErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:32,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:32,690 INFO L85 PathProgramCache]: Analyzing trace with hash -870107508, now seen corresponding path program 1 times [2021-11-13 17:46:32,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:32,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099124198] [2021-11-13 17:46:32,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:32,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:32,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:32,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:32,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:32,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 17:46:32,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:32,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099124198] [2021-11-13 17:46:32,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099124198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:32,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:32,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-13 17:46:32,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350928916] [2021-11-13 17:46:32,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:32,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 17:46:32,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:32,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 17:46:32,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:46:32,988 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand has 15 states, 14 states have (on average 2.0) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:33,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:33,830 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2021-11-13 17:46:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 17:46:33,835 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-11-13 17:46:33,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:33,836 INFO L225 Difference]: With dead ends: 152 [2021-11-13 17:46:33,836 INFO L226 Difference]: Without dead ends: 152 [2021-11-13 17:46:33,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-11-13 17:46:33,837 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 232 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 525.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.07ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 627.41ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:33,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 311 Invalid, 948 Unknown, 0 Unchecked, 9.07ms Time], IncrementalHoareTripleChecker [14 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 627.41ms Time] [2021-11-13 17:46:33,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-13 17:46:33,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 121. [2021-11-13 17:46:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 75 states have (on average 1.52) internal successors, (114), 105 states have internal predecessors, (114), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-13 17:46:33,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 134 transitions. [2021-11-13 17:46:33,842 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 134 transitions. Word has length 40 [2021-11-13 17:46:33,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:33,843 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 134 transitions. [2021-11-13 17:46:33,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:33,843 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 134 transitions. [2021-11-13 17:46:33,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-13 17:46:33,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:33,846 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:33,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 17:46:33,846 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_circular_remove_firstErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:33,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:33,847 INFO L85 PathProgramCache]: Analyzing trace with hash -870107507, now seen corresponding path program 1 times [2021-11-13 17:46:33,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:33,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570030714] [2021-11-13 17:46:33,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:33,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:33,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:34,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:34,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:34,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:46:34,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:34,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570030714] [2021-11-13 17:46:34,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570030714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:34,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:34,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-13 17:46:34,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864686534] [2021-11-13 17:46:34,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:34,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 17:46:34,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:34,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 17:46:34,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:46:34,198 INFO L87 Difference]: Start difference. First operand 121 states and 134 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:35,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:35,125 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2021-11-13 17:46:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 17:46:35,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-11-13 17:46:35,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:35,127 INFO L225 Difference]: With dead ends: 154 [2021-11-13 17:46:35,127 INFO L226 Difference]: Without dead ends: 154 [2021-11-13 17:46:35,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-11-13 17:46:35,128 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 230 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 584.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.36ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 682.63ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:35,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 308 Invalid, 952 Unknown, 0 Unchecked, 9.36ms Time], IncrementalHoareTripleChecker [14 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 682.63ms Time] [2021-11-13 17:46:35,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-13 17:46:35,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 121. [2021-11-13 17:46:35,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 75 states have (on average 1.4933333333333334) internal successors, (112), 105 states have internal predecessors, (112), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-13 17:46:35,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2021-11-13 17:46:35,135 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 40 [2021-11-13 17:46:35,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:35,137 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2021-11-13 17:46:35,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:35,137 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2021-11-13 17:46:35,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 17:46:35,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:35,143 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:35,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 17:46:35,143 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_circular_remove_firstErr4REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:35,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1345309645, now seen corresponding path program 1 times [2021-11-13 17:46:35,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:35,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877586059] [2021-11-13 17:46:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:35,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:35,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:35,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:35,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:35,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:35,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 17:46:35,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:35,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877586059] [2021-11-13 17:46:35,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877586059] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:35,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:35,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:46:35,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723785738] [2021-11-13 17:46:35,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:35,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:46:35,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:35,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:46:35,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:46:35,227 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:35,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:35,440 INFO L93 Difference]: Finished difference Result 120 states and 131 transitions. [2021-11-13 17:46:35,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:46:35,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2021-11-13 17:46:35,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:35,442 INFO L225 Difference]: With dead ends: 120 [2021-11-13 17:46:35,442 INFO L226 Difference]: Without dead ends: 120 [2021-11-13 17:46:35,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:46:35,443 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 116 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 123.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.15ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 145.76ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:35,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 110 Invalid, 139 Unknown, 0 Unchecked, 2.15ms Time], IncrementalHoareTripleChecker [12 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 145.76ms Time] [2021-11-13 17:46:35,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-13 17:46:35,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2021-11-13 17:46:35,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 72 states have (on average 1.4861111111111112) internal successors, (107), 101 states have internal predecessors, (107), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-13 17:46:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2021-11-13 17:46:35,449 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 42 [2021-11-13 17:46:35,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:35,449 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2021-11-13 17:46:35,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2021-11-13 17:46:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 17:46:35,451 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:35,451 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:35,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 17:46:35,452 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_circular_remove_firstErr5REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:35,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:35,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1345309646, now seen corresponding path program 1 times [2021-11-13 17:46:35,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:35,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899067978] [2021-11-13 17:46:35,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:35,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:35,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:35,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:35,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:35,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:35,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 17:46:35,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:35,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899067978] [2021-11-13 17:46:35,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899067978] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:35,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:35,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:46:35,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939914375] [2021-11-13 17:46:35,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:35,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:46:35,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:35,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:46:35,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:46:35,572 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 17:46:35,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:35,883 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2021-11-13 17:46:35,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:46:35,883 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2021-11-13 17:46:35,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:35,884 INFO L225 Difference]: With dead ends: 110 [2021-11-13 17:46:35,884 INFO L226 Difference]: Without dead ends: 110 [2021-11-13 17:46:35,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:46:35,885 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 196 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.59ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 174.88ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:35,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 163 Invalid, 194 Unknown, 0 Unchecked, 2.59ms Time], IncrementalHoareTripleChecker [24 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 174.88ms Time] [2021-11-13 17:46:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-13 17:46:35,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-13 17:46:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 72 states have (on average 1.3888888888888888) internal successors, (100), 94 states have internal predecessors, (100), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 7 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-13 17:46:35,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2021-11-13 17:46:35,891 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 42 [2021-11-13 17:46:35,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:35,892 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2021-11-13 17:46:35,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 17:46:35,892 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2021-11-13 17:46:35,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 17:46:35,893 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:35,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:35,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 17:46:35,894 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_circular_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:35,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:35,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1779866749, now seen corresponding path program 1 times [2021-11-13 17:46:35,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:35,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104420803] [2021-11-13 17:46:35,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:35,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:35,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:36,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:36,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:36,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:36,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:36,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:36,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:46:36,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:36,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104420803] [2021-11-13 17:46:36,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104420803] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:36,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:36,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-13 17:46:36,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920727515] [2021-11-13 17:46:36,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:36,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 17:46:36,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:36,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 17:46:36,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:46:36,155 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 15 states, 14 states have (on average 2.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:36,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:36,930 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2021-11-13 17:46:36,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 17:46:36,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2021-11-13 17:46:36,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:36,932 INFO L225 Difference]: With dead ends: 155 [2021-11-13 17:46:36,932 INFO L226 Difference]: Without dead ends: 155 [2021-11-13 17:46:36,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-11-13 17:46:36,933 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 215 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 453.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.84ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 535.64ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:36,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 358 Invalid, 841 Unknown, 0 Unchecked, 7.84ms Time], IncrementalHoareTripleChecker [22 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 535.64ms Time] [2021-11-13 17:46:36,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-13 17:46:36,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 128. [2021-11-13 17:46:36,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 87 states have (on average 1.4252873563218391) internal successors, (124), 110 states have internal predecessors, (124), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (15), 8 states have call predecessors, (15), 10 states have call successors, (15) [2021-11-13 17:46:36,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2021-11-13 17:46:36,940 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 45 [2021-11-13 17:46:36,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:36,941 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2021-11-13 17:46:36,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:36,941 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2021-11-13 17:46:36,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 17:46:36,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:36,942 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:36,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 17:46:36,942 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting sll_circular_remove_firstErr15REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:36,942 INFO L85 PathProgramCache]: Analyzing trace with hash -658274541, now seen corresponding path program 1 times [2021-11-13 17:46:36,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:36,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809603087] [2021-11-13 17:46:36,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:36,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:36,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:37,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:37,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:37,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:37,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 17:46:37,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:37,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809603087] [2021-11-13 17:46:37,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809603087] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:37,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:37,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:46:37,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888101357] [2021-11-13 17:46:37,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:37,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:46:37,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:37,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:46:37,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:46:37,061 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:37,472 INFO L93 Difference]: Finished difference Result 128 states and 150 transitions. [2021-11-13 17:46:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:46:37,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2021-11-13 17:46:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:37,474 INFO L225 Difference]: With dead ends: 128 [2021-11-13 17:46:37,474 INFO L226 Difference]: Without dead ends: 128 [2021-11-13 17:46:37,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:46:37,475 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 105 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 174.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.05ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 207.13ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:37,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 199 Invalid, 283 Unknown, 0 Unchecked, 3.05ms Time], IncrementalHoareTripleChecker [16 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 207.13ms Time] [2021-11-13 17:46:37,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-13 17:46:37,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-11-13 17:46:37,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 88 states have (on average 1.4090909090909092) internal successors, (124), 109 states have internal predecessors, (124), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (15), 8 states have call predecessors, (15), 10 states have call successors, (15) [2021-11-13 17:46:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2021-11-13 17:46:37,481 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 46 [2021-11-13 17:46:37,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:37,481 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2021-11-13 17:46:37,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:37,482 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2021-11-13 17:46:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 17:46:37,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:37,483 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:37,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 17:46:37,483 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting sll_circular_remove_firstErr16REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:37,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:37,484 INFO L85 PathProgramCache]: Analyzing trace with hash -658274540, now seen corresponding path program 1 times [2021-11-13 17:46:37,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:37,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594972660] [2021-11-13 17:46:37,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:37,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:37,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:37,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:37,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:37,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:37,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:46:37,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:37,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594972660] [2021-11-13 17:46:37,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594972660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:37,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:37,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-13 17:46:37,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855630655] [2021-11-13 17:46:37,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:37,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 17:46:37,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 17:46:37,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2021-11-13 17:46:37,848 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:39,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:39,024 INFO L93 Difference]: Finished difference Result 169 states and 194 transitions. [2021-11-13 17:46:39,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-13 17:46:39,025 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2021-11-13 17:46:39,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:39,026 INFO L225 Difference]: With dead ends: 169 [2021-11-13 17:46:39,026 INFO L226 Difference]: Without dead ends: 169 [2021-11-13 17:46:39,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2021-11-13 17:46:39,027 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 219 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 657.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.39ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 779.01ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:39,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 363 Invalid, 990 Unknown, 0 Unchecked, 8.39ms Time], IncrementalHoareTripleChecker [23 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 779.01ms Time] [2021-11-13 17:46:39,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-13 17:46:39,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 144. [2021-11-13 17:46:39,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 104 states have (on average 1.4038461538461537) internal successors, (146), 126 states have internal predecessors, (146), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (17), 8 states have call predecessors, (17), 10 states have call successors, (17) [2021-11-13 17:46:39,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 174 transitions. [2021-11-13 17:46:39,039 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 174 transitions. Word has length 46 [2021-11-13 17:46:39,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:39,039 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 174 transitions. [2021-11-13 17:46:39,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:39,040 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 174 transitions. [2021-11-13 17:46:39,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 17:46:39,041 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:39,041 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:39,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 17:46:39,041 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_circular_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:39,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:39,042 INFO L85 PathProgramCache]: Analyzing trace with hash -658705490, now seen corresponding path program 1 times [2021-11-13 17:46:39,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:39,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576725300] [2021-11-13 17:46:39,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:39,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:39,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:39,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:39,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:39,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:39,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:39,279 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:46:39,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:39,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576725300] [2021-11-13 17:46:39,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576725300] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:39,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:39,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-11-13 17:46:39,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914198564] [2021-11-13 17:46:39,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:39,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 17:46:39,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:39,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 17:46:39,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:46:39,281 INFO L87 Difference]: Start difference. First operand 144 states and 174 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:40,035 INFO L93 Difference]: Finished difference Result 163 states and 192 transitions. [2021-11-13 17:46:40,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 17:46:40,035 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 46 [2021-11-13 17:46:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:40,036 INFO L225 Difference]: With dead ends: 163 [2021-11-13 17:46:40,037 INFO L226 Difference]: Without dead ends: 163 [2021-11-13 17:46:40,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-11-13 17:46:40,038 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 177 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 435.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.86ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 521.66ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:40,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 345 Invalid, 828 Unknown, 0 Unchecked, 5.86ms Time], IncrementalHoareTripleChecker [18 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 521.66ms Time] [2021-11-13 17:46:40,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-11-13 17:46:40,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 147. [2021-11-13 17:46:40,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 107 states have (on average 1.3925233644859814) internal successors, (149), 129 states have internal predecessors, (149), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (17), 8 states have call predecessors, (17), 10 states have call successors, (17) [2021-11-13 17:46:40,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions. [2021-11-13 17:46:40,045 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 46 [2021-11-13 17:46:40,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:40,046 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 177 transitions. [2021-11-13 17:46:40,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:40,046 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions. [2021-11-13 17:46:40,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-13 17:46:40,047 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:40,047 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:40,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 17:46:40,048 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting sll_circular_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:40,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:40,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1054966431, now seen corresponding path program 1 times [2021-11-13 17:46:40,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:40,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753410311] [2021-11-13 17:46:40,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:40,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:40,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:40,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:40,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:40,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:40,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:40,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 17:46:40,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:40,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753410311] [2021-11-13 17:46:40,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753410311] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:40,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:40,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 17:46:40,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023066055] [2021-11-13 17:46:40,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:40,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:46:40,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:40,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:46:40,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:46:40,141 INFO L87 Difference]: Start difference. First operand 147 states and 177 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:40,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:40,457 INFO L93 Difference]: Finished difference Result 146 states and 175 transitions. [2021-11-13 17:46:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:46:40,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2021-11-13 17:46:40,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:40,459 INFO L225 Difference]: With dead ends: 146 [2021-11-13 17:46:40,459 INFO L226 Difference]: Without dead ends: 146 [2021-11-13 17:46:40,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:46:40,460 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 87 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 149.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.47ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 185.48ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:40,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 169 Invalid, 230 Unknown, 0 Unchecked, 2.47ms Time], IncrementalHoareTripleChecker [9 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 185.48ms Time] [2021-11-13 17:46:40,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-13 17:46:40,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-11-13 17:46:40,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 107 states have (on average 1.3738317757009346) internal successors, (147), 128 states have internal predecessors, (147), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (17), 8 states have call predecessors, (17), 10 states have call successors, (17) [2021-11-13 17:46:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2021-11-13 17:46:40,468 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 47 [2021-11-13 17:46:40,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:40,468 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2021-11-13 17:46:40,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:40,469 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2021-11-13 17:46:40,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 17:46:40,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:40,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:40,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 17:46:40,470 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting sll_circular_remove_firstErr11REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:40,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:40,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1655778863, now seen corresponding path program 1 times [2021-11-13 17:46:40,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:40,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112162285] [2021-11-13 17:46:40,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:40,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:40,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:40,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:40,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:40,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:40,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:40,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:46:40,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:40,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112162285] [2021-11-13 17:46:40,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112162285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:40,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:40,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-13 17:46:40,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175077753] [2021-11-13 17:46:40,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:40,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 17:46:40,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:40,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 17:46:40,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-11-13 17:46:40,738 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand has 18 states, 16 states have (on average 2.375) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 17:46:41,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:41,620 INFO L93 Difference]: Finished difference Result 160 states and 188 transitions. [2021-11-13 17:46:41,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 17:46:41,620 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2021-11-13 17:46:41,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:41,622 INFO L225 Difference]: With dead ends: 160 [2021-11-13 17:46:41,622 INFO L226 Difference]: Without dead ends: 160 [2021-11-13 17:46:41,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2021-11-13 17:46:41,623 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 231 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 452.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.48ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 554.60ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:41,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 323 Invalid, 961 Unknown, 0 Unchecked, 5.48ms Time], IncrementalHoareTripleChecker [26 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 554.60ms Time] [2021-11-13 17:46:41,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-13 17:46:41,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 148. [2021-11-13 17:46:41,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 109 states have (on average 1.3669724770642202) internal successors, (149), 130 states have internal predecessors, (149), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (17), 8 states have call predecessors, (17), 10 states have call successors, (17) [2021-11-13 17:46:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 177 transitions. [2021-11-13 17:46:41,638 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 177 transitions. Word has length 48 [2021-11-13 17:46:41,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:41,639 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 177 transitions. [2021-11-13 17:46:41,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.375) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 17:46:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 177 transitions. [2021-11-13 17:46:41,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 17:46:41,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:41,641 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2021-11-13 17:46:41,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-13 17:46:41,641 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sll_circular_remove_firstErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:41,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:41,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1103929599, now seen corresponding path program 2 times [2021-11-13 17:46:41,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:41,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045976858] [2021-11-13 17:46:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:41,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:41,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:41,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:41,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:41,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:41,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 17:46:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:41,777 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 17:46:41,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:41,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045976858] [2021-11-13 17:46:41,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045976858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:46:41,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774459248] [2021-11-13 17:46:41,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:46:41,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:46:41,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:46:41,779 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:46:41,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:46:41,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:46:41,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:46:41,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 17:46:41,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:46:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 17:46:42,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:46:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 17:46:42,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774459248] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:46:42,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:46:42,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 12 [2021-11-13 17:46:42,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273703439] [2021-11-13 17:46:42,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:42,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:46:42,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:42,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:46:42,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:46:42,277 INFO L87 Difference]: Start difference. First operand 148 states and 177 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-13 17:46:42,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:42,300 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2021-11-13 17:46:42,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:46:42,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 51 [2021-11-13 17:46:42,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:42,302 INFO L225 Difference]: With dead ends: 143 [2021-11-13 17:46:42,303 INFO L226 Difference]: Without dead ends: 126 [2021-11-13 17:46:42,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:46:42,304 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 22 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.54ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.21ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:42,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 237 Invalid, 23 Unknown, 0 Unchecked, 0.54ms Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 20.21ms Time] [2021-11-13 17:46:42,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-13 17:46:42,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-11-13 17:46:42,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 92 states have (on average 1.391304347826087) internal successors, (128), 112 states have internal predecessors, (128), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-13 17:46:42,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 147 transitions. [2021-11-13 17:46:42,313 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 147 transitions. Word has length 51 [2021-11-13 17:46:42,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:42,313 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 147 transitions. [2021-11-13 17:46:42,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-13 17:46:42,314 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 147 transitions. [2021-11-13 17:46:42,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 17:46:42,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:42,315 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:42,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 17:46:42,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-13 17:46:42,526 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:42,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:42,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1386580709, now seen corresponding path program 1 times [2021-11-13 17:46:42,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:42,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783643176] [2021-11-13 17:46:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:42,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:42,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:42,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:42,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:42,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 17:46:42,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:42,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783643176] [2021-11-13 17:46:42,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783643176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:46:42,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:46:42,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-13 17:46:42,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586042972] [2021-11-13 17:46:42,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:46:42,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 17:46:42,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:42,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 17:46:42,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:46:42,758 INFO L87 Difference]: Start difference. First operand 126 states and 147 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:43,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:43,515 INFO L93 Difference]: Finished difference Result 124 states and 139 transitions. [2021-11-13 17:46:43,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 17:46:43,517 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2021-11-13 17:46:43,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:43,518 INFO L225 Difference]: With dead ends: 124 [2021-11-13 17:46:43,518 INFO L226 Difference]: Without dead ends: 124 [2021-11-13 17:46:43,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-11-13 17:46:43,519 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 110 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 275.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.14ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 330.15ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:43,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 333 Invalid, 523 Unknown, 0 Unchecked, 3.14ms Time], IncrementalHoareTripleChecker [27 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 330.15ms Time] [2021-11-13 17:46:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-13 17:46:43,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2021-11-13 17:46:43,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 87 states have (on average 1.3563218390804597) internal successors, (118), 106 states have internal predecessors, (118), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-13 17:46:43,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 136 transitions. [2021-11-13 17:46:43,525 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 136 transitions. Word has length 51 [2021-11-13 17:46:43,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:43,525 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 136 transitions. [2021-11-13 17:46:43,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:46:43,526 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 136 transitions. [2021-11-13 17:46:43,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 17:46:43,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:43,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:43,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-13 17:46:43,527 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting sll_circular_remove_firstErr15REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:43,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:43,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1386528094, now seen corresponding path program 1 times [2021-11-13 17:46:43,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:43,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116806132] [2021-11-13 17:46:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:43,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:43,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:43,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:43,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:43,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:43,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:46:43,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:43,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116806132] [2021-11-13 17:46:43,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116806132] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:46:43,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249365958] [2021-11-13 17:46:43,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:43,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:46:43,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:46:44,002 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:46:44,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 17:46:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:44,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-13 17:46:44,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:46:44,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 17:46:44,418 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 17:46:44,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 17:46:44,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 17:46:44,626 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 17:46:44,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-11-13 17:46:45,245 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 70 treesize of output 62 [2021-11-13 17:46:45,508 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-13 17:46:45,509 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 60 treesize of output 26 [2021-11-13 17:46:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:45,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:46:45,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-11-13 17:46:45,817 INFO L354 Elim1Store]: treesize reduction 77, result has 1.3 percent of original size [2021-11-13 17:46:45,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 776 treesize of output 1 [2021-11-13 17:46:45,991 INFO L354 Elim1Store]: treesize reduction 5, result has 84.4 percent of original size [2021-11-13 17:46:45,992 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 52 treesize of output 51 [2021-11-13 17:46:47,020 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_~#s~0.base| Int) (|v_main_~#s~0.offset_BEFORE_CALL_5| Int) (sll_circular_create_~last~0.offset Int)) (let ((.cse1 (store |c_#memory_$Pointer$.base| c_sll_circular_create_~last~0.base (store (select |c_#memory_$Pointer$.base| c_sll_circular_create_~last~0.base) sll_circular_create_~last~0.offset c_sll_circular_create_~head~0.base)))) (let ((.cse0 (select (select .cse1 |main_~#s~0.base|) |v_main_~#s~0.offset_BEFORE_CALL_5|))) (or (not (= c_sll_circular_create_~head~0.base .cse0)) (= (select (select .cse1 .cse0) c_sll_circular_create_~head~0.offset) c_sll_circular_create_~last~0.base))))) is different from false [2021-11-13 17:46:47,929 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_~#s~0.base| Int) (|v_main_~#s~0.offset_BEFORE_CALL_5| Int) (sll_circular_create_~last~0.offset Int)) (let ((.cse0 (store |c_#memory_$Pointer$.base| c_sll_circular_create_~last~0.base (store (select |c_#memory_$Pointer$.base| c_sll_circular_create_~last~0.base) sll_circular_create_~last~0.offset c_sll_circular_create_~new_head~0.base)))) (let ((.cse1 (select (select .cse0 |main_~#s~0.base|) |v_main_~#s~0.offset_BEFORE_CALL_5|))) (or (= (select (select .cse0 .cse1) c_sll_circular_create_~new_head~0.offset) c_sll_circular_create_~last~0.base) (not (= .cse1 c_sll_circular_create_~new_head~0.base)))))) is different from false [2021-11-13 17:46:47,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:46:47,953 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 314 treesize of output 308 [2021-11-13 17:46:48,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249365958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:46:48,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:46:48,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 40 [2021-11-13 17:46:48,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990766174] [2021-11-13 17:46:48,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:46:48,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-13 17:46:48,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:46:48,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-13 17:46:48,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1947, Unknown=2, NotChecked=178, Total=2256 [2021-11-13 17:46:48,903 INFO L87 Difference]: Start difference. First operand 120 states and 136 transitions. Second operand has 41 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 17:46:49,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:46:49,677 INFO L93 Difference]: Finished difference Result 123 states and 139 transitions. [2021-11-13 17:46:49,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 17:46:49,690 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2021-11-13 17:46:49,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:46:49,691 INFO L225 Difference]: With dead ends: 123 [2021-11-13 17:46:49,692 INFO L226 Difference]: Without dead ends: 123 [2021-11-13 17:46:49,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=183, Invalid=2685, Unknown=2, NotChecked=210, Total=3080 [2021-11-13 17:46:49,694 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 29 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 411.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1134 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.26ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 491.71ms IncrementalHoareTripleChecker+Time [2021-11-13 17:46:49,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1134 Invalid, 1171 Unknown, 0 Unchecked, 5.26ms Time], IncrementalHoareTripleChecker [14 Valid, 929 Invalid, 0 Unknown, 228 Unchecked, 491.71ms Time] [2021-11-13 17:46:49,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-13 17:46:49,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2021-11-13 17:46:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 89 states have (on average 1.3595505617977528) internal successors, (121), 108 states have internal predecessors, (121), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-13 17:46:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 139 transitions. [2021-11-13 17:46:49,702 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 139 transitions. Word has length 51 [2021-11-13 17:46:49,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:46:49,703 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 139 transitions. [2021-11-13 17:46:49,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 31 states have internal predecessors, (74), 5 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 17:46:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 139 transitions. [2021-11-13 17:46:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 17:46:49,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:46:49,704 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:46:49,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 17:46:49,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-13 17:46:49,918 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting sll_circular_remove_firstErr16REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:46:49,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:46:49,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1386528093, now seen corresponding path program 1 times [2021-11-13 17:46:49,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:46:49,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139796098] [2021-11-13 17:46:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:49,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:46:49,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:50,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:46:50,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:50,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:46:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:50,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:46:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:50,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:46:50,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:46:50,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:46:50,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139796098] [2021-11-13 17:46:50,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139796098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:46:50,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598327780] [2021-11-13 17:46:50,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:46:50,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:46:50,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:46:50,922 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:46:50,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 17:46:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:46:51,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-13 17:46:51,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:46:51,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 17:46:51,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 17:46:51,570 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 17:46:51,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 17:46:51,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-13 17:46:51,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 17:46:51,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 17:46:51,959 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-13 17:46:51,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-11-13 17:46:51,972 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 17:46:51,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-11-13 17:46:53,218 INFO L354 Elim1Store]: treesize reduction 61, result has 11.6 percent of original size [2021-11-13 17:46:53,218 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 121 treesize of output 66 [2021-11-13 17:46:53,233 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-11-13 17:46:53,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 37 [2021-11-13 17:46:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:46:53,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:46:54,410 INFO L354 Elim1Store]: treesize reduction 300, result has 0.3 percent of original size [2021-11-13 17:46:54,410 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 3498 treesize of output 1 [2021-11-13 17:46:56,246 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_~#s~0.base| Int) (|v_main_~#s~0.offset_BEFORE_CALL_8| Int)) (let ((.cse4 (store |c_#memory_$Pointer$.offset| c_sll_circular_create_~last~0.base (store (select |c_#memory_$Pointer$.offset| c_sll_circular_create_~last~0.base) c_sll_circular_create_~last~0.offset c_sll_circular_create_~head~0.offset))) (.cse3 (store |c_#memory_$Pointer$.base| c_sll_circular_create_~last~0.base (store (select |c_#memory_$Pointer$.base| c_sll_circular_create_~last~0.base) c_sll_circular_create_~last~0.offset c_sll_circular_create_~head~0.base)))) (let ((.cse1 (select (select .cse3 |main_~#s~0.base|) |v_main_~#s~0.offset_BEFORE_CALL_8|)) (.cse0 (select (select .cse4 |main_~#s~0.base|) |v_main_~#s~0.offset_BEFORE_CALL_8|))) (or (not (= .cse0 c_sll_circular_create_~head~0.offset)) (not (= .cse1 c_sll_circular_create_~head~0.base)) (let ((.cse2 (select (select .cse4 .cse1) .cse0))) (and (<= 0 .cse2) (<= (+ .cse2 4) (select |c_#length| (select (select .cse3 .cse1) .cse0))))))))) is different from false [2021-11-13 17:46:57,797 WARN L838 $PredicateComparison]: unable to prove that (forall ((|main_~#s~0.base| Int) (|v_main_~#s~0.offset_BEFORE_CALL_8| Int)) (let ((.cse4 (store |c_#memory_$Pointer$.offset| c_sll_circular_create_~last~0.base (store (select |c_#memory_$Pointer$.offset| c_sll_circular_create_~last~0.base) c_sll_circular_create_~last~0.offset c_sll_circular_create_~new_head~0.offset))) (.cse1 (store |c_#memory_$Pointer$.base| c_sll_circular_create_~last~0.base (store (select |c_#memory_$Pointer$.base| c_sll_circular_create_~last~0.base) c_sll_circular_create_~last~0.offset c_sll_circular_create_~new_head~0.base)))) (let ((.cse2 (select (select .cse1 |main_~#s~0.base|) |v_main_~#s~0.offset_BEFORE_CALL_8|)) (.cse3 (select (select .cse4 |main_~#s~0.base|) |v_main_~#s~0.offset_BEFORE_CALL_8|))) (or (let ((.cse0 (select (select .cse4 .cse2) .cse3))) (and (<= (+ .cse0 4) (select |c_#length| (select (select .cse1 .cse2) .cse3))) (<= 0 .cse0))) (not (= c_sll_circular_create_~new_head~0.base .cse2)) (not (= c_sll_circular_create_~new_head~0.offset .cse3)))))) is different from false [2021-11-13 17:46:57,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:46:57,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 6160 treesize of output 5881 [2021-11-13 17:46:58,447 INFO L354 Elim1Store]: treesize reduction 154, result has 56.6 percent of original size [2021-11-13 17:46:58,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 29723 treesize of output 26431 [2021-11-13 17:47:00,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-13 17:47:00,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:47:00,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-11-13 17:47:00,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626375044] [2021-11-13 17:47:00,344 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 17:47:00,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-13 17:47:00,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:00,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-13 17:47:00,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3236, Unknown=2, NotChecked=230, Total=3660 [2021-11-13 17:47:00,349 INFO L87 Difference]: Start difference. First operand 122 states and 139 transitions. Second operand has 29 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 23 states have internal predecessors, (41), 3 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 17:47:02,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:02,521 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2021-11-13 17:47:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 17:47:02,522 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 23 states have internal predecessors, (41), 3 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2021-11-13 17:47:02,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:02,526 INFO L225 Difference]: With dead ends: 148 [2021-11-13 17:47:02,526 INFO L226 Difference]: Without dead ends: 148 [2021-11-13 17:47:02,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1078 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=387, Invalid=5471, Unknown=2, NotChecked=302, Total=6162 [2021-11-13 17:47:02,529 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 222 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 869.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.47ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1013.03ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:02,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 509 Invalid, 1763 Unknown, 0 Unchecked, 8.47ms Time], IncrementalHoareTripleChecker [39 Valid, 1724 Invalid, 0 Unknown, 0 Unchecked, 1013.03ms Time] [2021-11-13 17:47:02,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-13 17:47:02,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 133. [2021-11-13 17:47:02,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 99 states have (on average 1.3636363636363635) internal successors, (135), 119 states have internal predecessors, (135), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-13 17:47:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2021-11-13 17:47:02,538 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 51 [2021-11-13 17:47:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:02,539 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2021-11-13 17:47:02,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 23 states have internal predecessors, (41), 3 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 17:47:02,539 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2021-11-13 17:47:02,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-13 17:47:02,540 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:02,540 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:02,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 17:47:02,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:02,762 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:47:02,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:02,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1807125059, now seen corresponding path program 1 times [2021-11-13 17:47:02,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:02,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103694537] [2021-11-13 17:47:02,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:02,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:02,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:47:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:02,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:47:02,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:02,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:02,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:47:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:02,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 17:47:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 17:47:02,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:02,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103694537] [2021-11-13 17:47:02,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103694537] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:47:02,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:47:02,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:47:02,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220886224] [2021-11-13 17:47:02,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:47:02,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:47:02,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:02,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:47:02,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:47:02,871 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 17:47:03,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:03,140 INFO L93 Difference]: Finished difference Result 131 states and 151 transitions. [2021-11-13 17:47:03,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 17:47:03,142 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 53 [2021-11-13 17:47:03,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:03,143 INFO L225 Difference]: With dead ends: 131 [2021-11-13 17:47:03,143 INFO L226 Difference]: Without dead ends: 131 [2021-11-13 17:47:03,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:47:03,144 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 156 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 127.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.67ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 155.86ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:03,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 153 Invalid, 212 Unknown, 0 Unchecked, 1.67ms Time], IncrementalHoareTripleChecker [22 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 155.86ms Time] [2021-11-13 17:47:03,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-13 17:47:03,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-13 17:47:03,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 99 states have (on average 1.3333333333333333) internal successors, (132), 117 states have internal predecessors, (132), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (11), 6 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-13 17:47:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 151 transitions. [2021-11-13 17:47:03,149 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 151 transitions. Word has length 53 [2021-11-13 17:47:03,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:03,150 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 151 transitions. [2021-11-13 17:47:03,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.142857142857143) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 17:47:03,150 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 151 transitions. [2021-11-13 17:47:03,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-13 17:47:03,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:03,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:03,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-13 17:47:03,152 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:47:03,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:03,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1807125058, now seen corresponding path program 1 times [2021-11-13 17:47:03,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:03,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371128453] [2021-11-13 17:47:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:03,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:03,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:47:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:03,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:47:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:03,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:03,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:47:03,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:03,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 17:47:03,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 17:47:03,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:03,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371128453] [2021-11-13 17:47:03,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371128453] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:47:03,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567992240] [2021-11-13 17:47:03,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:03,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:03,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:03,262 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:03,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 17:47:03,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:03,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 17:47:03,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 17:47:03,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:47:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 17:47:03,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567992240] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:47:03,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:47:03,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 13 [2021-11-13 17:47:03,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580991834] [2021-11-13 17:47:03,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:47:03,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 17:47:03,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:03,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 17:47:03,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:47:03,679 INFO L87 Difference]: Start difference. First operand 131 states and 151 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 6 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-13 17:47:03,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:03,929 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2021-11-13 17:47:03,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:47:03,930 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 6 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 53 [2021-11-13 17:47:03,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:03,931 INFO L225 Difference]: With dead ends: 135 [2021-11-13 17:47:03,932 INFO L226 Difference]: Without dead ends: 135 [2021-11-13 17:47:03,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:47:03,932 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 88 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 181.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.33ms SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 215.23ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:03,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 238 Invalid, 326 Unknown, 0 Unchecked, 2.33ms Time], IncrementalHoareTripleChecker [29 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 215.23ms Time] [2021-11-13 17:47:03,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-13 17:47:03,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-11-13 17:47:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 103 states have (on average 1.3203883495145632) internal successors, (136), 119 states have internal predecessors, (136), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2021-11-13 17:47:03,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 155 transitions. [2021-11-13 17:47:03,939 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 155 transitions. Word has length 53 [2021-11-13 17:47:03,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:03,939 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 155 transitions. [2021-11-13 17:47:03,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 10 states have internal predecessors, (49), 6 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-13 17:47:03,940 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 155 transitions. [2021-11-13 17:47:03,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 17:47:03,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:03,941 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:03,970 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-13 17:47:04,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:04,154 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting sll_circular_remove_firstErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:47:04,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:04,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1480219245, now seen corresponding path program 1 times [2021-11-13 17:47:04,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:04,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396552593] [2021-11-13 17:47:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:04,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:04,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:47:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:04,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:47:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:04,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:04,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:47:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:04,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 17:47:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:04,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 17:47:04,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:04,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396552593] [2021-11-13 17:47:04,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396552593] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:47:04,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523871365] [2021-11-13 17:47:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:04,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:04,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:04,346 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:04,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 17:47:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:04,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 17:47:04,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 17:47:04,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:47:04,716 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 17 treesize of output 13 [2021-11-13 17:47:04,766 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-13 17:47:04,767 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 10 [2021-11-13 17:47:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 17:47:04,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523871365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:47:04,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:47:04,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 14 [2021-11-13 17:47:04,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350689712] [2021-11-13 17:47:04,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:47:04,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 17:47:04,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:04,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 17:47:04,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:47:04,843 INFO L87 Difference]: Start difference. First operand 135 states and 155 transitions. Second operand has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 10 states have internal predecessors, (55), 4 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 17:47:05,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:05,552 INFO L93 Difference]: Finished difference Result 156 states and 174 transitions. [2021-11-13 17:47:05,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 17:47:05,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 10 states have internal predecessors, (55), 4 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2021-11-13 17:47:05,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:05,558 INFO L225 Difference]: With dead ends: 156 [2021-11-13 17:47:05,558 INFO L226 Difference]: Without dead ends: 156 [2021-11-13 17:47:05,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-11-13 17:47:05,559 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 325 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 315.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.15ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 369.26ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:05,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 275 Invalid, 483 Unknown, 0 Unchecked, 4.15ms Time], IncrementalHoareTripleChecker [40 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 369.26ms Time] [2021-11-13 17:47:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-13 17:47:05,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 141. [2021-11-13 17:47:05,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 110 states have (on average 1.3181818181818181) internal successors, (145), 125 states have internal predecessors, (145), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-13 17:47:05,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 163 transitions. [2021-11-13 17:47:05,569 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 163 transitions. Word has length 55 [2021-11-13 17:47:05,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:05,571 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 163 transitions. [2021-11-13 17:47:05,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 10 states have internal predecessors, (55), 4 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 17:47:05,571 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 163 transitions. [2021-11-13 17:47:05,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 17:47:05,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:05,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:05,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-13 17:47:05,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:05,802 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting sll_circular_remove_firstErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:47:05,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:05,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1357843693, now seen corresponding path program 1 times [2021-11-13 17:47:05,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:05,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613356640] [2021-11-13 17:47:05,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:05,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:05,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:47:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:05,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:47:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:06,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:06,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:47:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:06,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-13 17:47:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:06,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:47:06,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:06,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613356640] [2021-11-13 17:47:06,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613356640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:47:06,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066980972] [2021-11-13 17:47:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:06,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:06,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:06,560 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:06,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 17:47:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:06,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-13 17:47:06,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:06,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 17:47:06,986 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 17:47:06,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 17:47:07,090 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 18 treesize of output 14 [2021-11-13 17:47:07,272 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 17:47:07,273 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 34 treesize of output 28 [2021-11-13 17:47:07,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-11-13 17:47:08,027 INFO L354 Elim1Store]: treesize reduction 56, result has 1.8 percent of original size [2021-11-13 17:47:08,028 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 57 treesize of output 1 [2021-11-13 17:47:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:08,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:47:08,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-13 17:47:08,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-13 17:47:08,874 INFO L354 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2021-11-13 17:47:08,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 272 treesize of output 1 [2021-11-13 17:47:08,987 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 106 treesize of output 98 [2021-11-13 17:47:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:09,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066980972] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:47:09,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:47:09,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 26] total 67 [2021-11-13 17:47:09,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645437519] [2021-11-13 17:47:09,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:47:09,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-13 17:47:09,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:47:09,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-13 17:47:09,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=4158, Unknown=0, NotChecked=0, Total=4422 [2021-11-13 17:47:09,693 INFO L87 Difference]: Start difference. First operand 141 states and 163 transitions. Second operand has 67 states, 66 states have (on average 1.5454545454545454) internal successors, (102), 52 states have internal predecessors, (102), 8 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-13 17:47:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:47:11,396 INFO L93 Difference]: Finished difference Result 123 states and 137 transitions. [2021-11-13 17:47:11,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-13 17:47:11,397 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.5454545454545454) internal successors, (102), 52 states have internal predecessors, (102), 8 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) Word has length 56 [2021-11-13 17:47:11,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:47:11,398 INFO L225 Difference]: With dead ends: 123 [2021-11-13 17:47:11,398 INFO L226 Difference]: Without dead ends: 116 [2021-11-13 17:47:11,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1437 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=514, Invalid=6292, Unknown=0, NotChecked=0, Total=6806 [2021-11-13 17:47:11,401 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 174 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 724.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 2230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.32ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 863.50ms IncrementalHoareTripleChecker+Time [2021-11-13 17:47:11,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 727 Invalid, 2230 Unknown, 0 Unchecked, 16.32ms Time], IncrementalHoareTripleChecker [55 Valid, 1763 Invalid, 0 Unknown, 412 Unchecked, 863.50ms Time] [2021-11-13 17:47:11,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-13 17:47:11,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 114. [2021-11-13 17:47:11,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 87 states have (on average 1.3218390804597702) internal successors, (115), 101 states have internal predecessors, (115), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 17:47:11,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 128 transitions. [2021-11-13 17:47:11,406 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 128 transitions. Word has length 56 [2021-11-13 17:47:11,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:47:11,407 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 128 transitions. [2021-11-13 17:47:11,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.5454545454545454) internal successors, (102), 52 states have internal predecessors, (102), 8 states have call successors, (15), 9 states have call predecessors, (15), 9 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2021-11-13 17:47:11,407 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 128 transitions. [2021-11-13 17:47:11,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 17:47:11,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:47:11,408 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:47:11,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 17:47:11,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:11,621 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting sll_circular_remove_firstErr25ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:47:11,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:47:11,621 INFO L85 PathProgramCache]: Analyzing trace with hash 761567980, now seen corresponding path program 1 times [2021-11-13 17:47:11,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:47:11,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132064611] [2021-11-13 17:47:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:11,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:47:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:11,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:47:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:11,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:47:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:12,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:47:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:12,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:47:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:47:12,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:47:12,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132064611] [2021-11-13 17:47:12,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132064611] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:47:12,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512341569] [2021-11-13 17:47:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:47:12,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:47:12,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:47:12,390 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:47:12,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 17:47:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:47:12,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-13 17:47:12,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:47:12,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 17:47:12,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-11-13 17:47:12,925 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 17:47:12,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-13 17:47:13,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 17:47:13,149 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 17:47:13,150 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 35 treesize of output 25 [2021-11-13 17:47:13,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:47:13,974 INFO L354 Elim1Store]: treesize reduction 57, result has 12.3 percent of original size [2021-11-13 17:47:13,974 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 9 case distinctions, treesize of input 64 treesize of output 32 [2021-11-13 17:47:14,116 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 17:47:14,116 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 24 treesize of output 23 [2021-11-13 17:47:14,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-13 17:47:14,167 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:47:14,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:47:41,900 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_sll_circular_remove_first_~last~1.offset_14 Int) (sll_circular_remove_first_~temp~1.offset Int)) (= (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| c_sll_circular_remove_first_~head.base) c_sll_circular_remove_first_~head.offset)) (select (select |c_#memory_$Pointer$.offset| c_sll_circular_remove_first_~head.base) c_sll_circular_remove_first_~head.offset)))) (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) v_sll_circular_remove_first_~last~1.offset_14 sll_circular_remove_first_~temp~1.offset))) c_sll_circular_remove_first_~head.base) c_sll_circular_remove_first_~head.offset) 0)) is different from false [2021-11-13 17:47:57,683 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_sll_circular_remove_first_~last~1.offset_14 Int) (sll_circular_remove_first_~temp~1.offset Int)) (= (select (select (let ((.cse0 (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_main_~#s~0.base|) |c_main_~#s~0.offset|)) (select (select |c_#memory_$Pointer$.offset| |c_main_~#s~0.base|) |c_main_~#s~0.offset|)))) (store |c_#memory_$Pointer$.offset| .cse0 (store (select |c_#memory_$Pointer$.offset| .cse0) v_sll_circular_remove_first_~last~1.offset_14 sll_circular_remove_first_~temp~1.offset))) |c_main_~#s~0.base|) |c_main_~#s~0.offset|) 0)) is different from false [2021-11-13 17:47:57,696 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 60 treesize of output 44 [2021-11-13 17:47:57,942 INFO L354 Elim1Store]: treesize reduction 33, result has 43.1 percent of original size [2021-11-13 17:47:57,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 667 treesize of output 643 [2021-11-13 17:47:57,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:47:57,988 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 587 treesize of output 589 [2021-11-13 17:47:59,848 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_main_~#s~0.base_BEFORE_CALL_14| Int) (sll_circular_create_~last~0.offset Int) (|v_main_~#s~0.offset_BEFORE_CALL_20| Int)) (let ((.cse0 (store |c_#memory_$Pointer$.base| c_sll_circular_create_~last~0.base (store (select |c_#memory_$Pointer$.base| c_sll_circular_create_~last~0.base) sll_circular_create_~last~0.offset c_sll_circular_create_~head~0.base)))) (let ((.cse1 (select (select .cse0 |v_main_~#s~0.base_BEFORE_CALL_14|) |v_main_~#s~0.offset_BEFORE_CALL_20|))) (or (and (= c_sll_circular_create_~head~0.offset 0) (not (= |v_main_~#s~0.base_BEFORE_CALL_14| (select (select .cse0 .cse1) c_sll_circular_create_~head~0.offset)))) (< |v_main_~#s~0.base_BEFORE_CALL_14| |c_#StackHeapBarrier|) (not (= c_sll_circular_create_~head~0.base .cse1)))))) is different from false [2021-11-13 17:48:00,880 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_main_~#s~0.base_BEFORE_CALL_14| Int) (sll_circular_create_~last~0.offset Int) (|v_main_~#s~0.offset_BEFORE_CALL_20| Int)) (let ((.cse1 (store |c_#memory_$Pointer$.base| c_sll_circular_create_~last~0.base (store (select |c_#memory_$Pointer$.base| c_sll_circular_create_~last~0.base) sll_circular_create_~last~0.offset c_sll_circular_create_~new_head~0.base)))) (let ((.cse0 (select (select .cse1 |v_main_~#s~0.base_BEFORE_CALL_14|) |v_main_~#s~0.offset_BEFORE_CALL_20|))) (or (< |v_main_~#s~0.base_BEFORE_CALL_14| |c_#StackHeapBarrier|) (not (= .cse0 c_sll_circular_create_~new_head~0.base)) (and (= c_sll_circular_create_~new_head~0.offset 0) (not (= |v_main_~#s~0.base_BEFORE_CALL_14| (select (select .cse1 .cse0) c_sll_circular_create_~new_head~0.offset)))))))) is different from false [2021-11-13 17:48:00,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 17:48:00,908 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 687 treesize of output 641 [2021-11-13 17:48:01,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512341569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:48:01,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:48:01,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25] total 50 [2021-11-13 17:48:01,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348798716] [2021-11-13 17:48:01,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:48:01,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-13 17:48:01,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:48:01,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-13 17:48:01,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=3664, Unknown=65, NotChecked=500, Total=4422 [2021-11-13 17:48:01,834 INFO L87 Difference]: Start difference. First operand 114 states and 128 transitions. Second operand has 51 states, 48 states have (on average 1.8125) internal successors, (87), 41 states have internal predecessors, (87), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-13 17:48:05,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:48:05,408 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2021-11-13 17:48:05,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-13 17:48:05,408 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 48 states have (on average 1.8125) internal successors, (87), 41 states have internal predecessors, (87), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 56 [2021-11-13 17:48:05,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:48:05,409 INFO L225 Difference]: With dead ends: 129 [2021-11-13 17:48:05,409 INFO L226 Difference]: Without dead ends: 129 [2021-11-13 17:48:05,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 50.6s TimeCoverageRelationStatistics Valid=288, Invalid=5512, Unknown=68, NotChecked=612, Total=6480 [2021-11-13 17:48:05,412 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 80 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 460.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.30ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 557.80ms IncrementalHoareTripleChecker+Time [2021-11-13 17:48:05,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1396 Invalid, 1332 Unknown, 0 Unchecked, 5.30ms Time], IncrementalHoareTripleChecker [22 Valid, 1182 Invalid, 0 Unknown, 128 Unchecked, 557.80ms Time] [2021-11-13 17:48:05,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-13 17:48:05,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 116. [2021-11-13 17:48:05,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 89 states have (on average 1.3146067415730338) internal successors, (117), 103 states have internal predecessors, (117), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-13 17:48:05,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2021-11-13 17:48:05,417 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 56 [2021-11-13 17:48:05,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:48:05,418 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2021-11-13 17:48:05,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 48 states have (on average 1.8125) internal successors, (87), 41 states have internal predecessors, (87), 8 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-13 17:48:05,418 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2021-11-13 17:48:05,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 17:48:05,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:48:05,419 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:48:05,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 17:48:05,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-13 17:48:05,630 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting sll_circular_remove_firstErr15REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 38 more)] === [2021-11-13 17:48:05,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:48:05,630 INFO L85 PathProgramCache]: Analyzing trace with hash 761620595, now seen corresponding path program 2 times [2021-11-13 17:48:05,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:48:05,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618248461] [2021-11-13 17:48:05,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:48:05,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:48:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:48:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:05,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:48:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:06,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:48:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:06,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:48:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:48:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:48:06,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:48:06,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618248461] [2021-11-13 17:48:06,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618248461] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:48:06,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741583422] [2021-11-13 17:48:06,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:48:06,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:48:06,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:48:06,586 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:48:06,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_177f6e4e-cfb3-4fe5-9da6-56897a065325/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 17:48:06,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:48:06,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:48:06,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-13 17:48:06,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:48:06,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 17:48:07,125 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 17:48:07,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-13 17:48:07,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 17:48:07,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 17:48:07,435 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-13 17:48:07,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-11-13 17:48:07,445 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 17:48:07,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-11-13 17:48:08,356 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-11-13 17:48:08,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 87 [2021-11-13 17:48:08,572 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-13 17:48:08,572 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 73 treesize of output 31 [2021-11-13 17:48:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:48:08,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:48:09,375 INFO L354 Elim1Store]: treesize reduction 3238, result has 0.0 percent of original size [2021-11-13 17:48:09,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 17 new quantified variables, introduced 56 case distinctions, treesize of input 82724 treesize of output 1 [2021-11-13 17:48:13,565 INFO L354 Elim1Store]: treesize reduction 3002, result has 39.8 percent of original size [2021-11-13 17:48:13,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 18 new quantified variables, introduced 78 case distinctions, treesize of input 13481 treesize of output 12729 [2021-11-13 17:48:14,524 INFO L354 Elim1Store]: treesize reduction 154, result has 56.6 percent of original size [2021-11-13 17:48:14,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 104172 treesize of output 90680 [2021-11-13 17:48:21,214 WARN L227 SmtUtils]: Spent 6.68s on a formula simplification. DAG size of input: 1592 DAG size of output: 1560 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)