./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/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_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/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_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/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 b335af75f55d322161e6a270bf4669ab290ae0e9da4bc480724c7d5e3b79fdab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:37:15,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:37:15,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:37:15,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:37:15,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:37:15,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:37:15,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:37:15,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:37:15,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:37:15,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:37:15,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:37:15,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:37:15,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:37:15,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:37:15,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:37:15,277 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:37:15,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:37:15,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:37:15,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:37:15,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:37:15,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:37:15,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:37:15,302 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:37:15,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:37:15,307 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:37:15,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:37:15,308 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:37:15,311 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:37:15,311 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:37:15,313 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:37:15,314 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:37:15,315 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:37:15,316 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:37:15,318 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:37:15,319 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:37:15,319 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:37:15,320 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:37:15,320 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:37:15,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:37:15,321 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:37:15,322 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:37:15,323 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-13 17:37:15,365 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:37:15,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:37:15,368 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:37:15,368 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:37:15,369 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:37:15,369 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:37:15,370 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:37:15,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:37:15,370 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:37:15,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:37:15,371 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:37:15,372 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-13 17:37:15,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:37:15,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:37:15,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:37:15,372 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-13 17:37:15,372 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-13 17:37:15,373 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-13 17:37:15,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:37:15,373 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 17:37:15,373 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:37:15,373 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:37:15,374 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:37:15,374 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:37:15,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:37:15,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:37:15,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:37:15,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:37:15,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:37:15,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:37:15,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:37:15,375 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_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b335af75f55d322161e6a270bf4669ab290ae0e9da4bc480724c7d5e3b79fdab [2021-11-13 17:37:15,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:37:15,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:37:15,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:37:15,726 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:37:15,727 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:37:15,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/list-simple/sll2c_append_equal.i [2021-11-13 17:37:15,801 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/data/9e4347772/5161e13025a64084a5f258b9dc90a758/FLAG93655be54 [2021-11-13 17:37:16,445 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:37:16,448 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/sv-benchmarks/c/list-simple/sll2c_append_equal.i [2021-11-13 17:37:16,463 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/data/9e4347772/5161e13025a64084a5f258b9dc90a758/FLAG93655be54 [2021-11-13 17:37:16,722 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/data/9e4347772/5161e13025a64084a5f258b9dc90a758 [2021-11-13 17:37:16,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:37:16,725 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-13 17:37:16,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:37:16,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:37:16,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:37:16,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:37:16" (1/1) ... [2021-11-13 17:37:16,732 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4018d3f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:37:16, skipping insertion in model container [2021-11-13 17:37:16,732 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:37:16" (1/1) ... [2021-11-13 17:37:16,739 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:37:16,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:37:17,058 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_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/sv-benchmarks/c/list-simple/sll2c_append_equal.i[24433,24446] [2021-11-13 17:37:17,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:37:17,068 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:37:17,109 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_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/sv-benchmarks/c/list-simple/sll2c_append_equal.i[24433,24446] [2021-11-13 17:37:17,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:37:17,138 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:37:17,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:37:17 WrapperNode [2021-11-13 17:37:17,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:37:17,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:37:17,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:37:17,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:37:17,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:37:17" (1/1) ... [2021-11-13 17:37:17,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:37:17" (1/1) ... [2021-11-13 17:37:17,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:37:17" (1/1) ... [2021-11-13 17:37:17,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:37:17" (1/1) ... [2021-11-13 17:37:17,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:37:17" (1/1) ... [2021-11-13 17:37:17,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:37:17" (1/1) ... [2021-11-13 17:37:17,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:37:17" (1/1) ... [2021-11-13 17:37:17,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:37:17,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:37:17,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:37:17,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:37:17,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:37:17" (1/1) ... [2021-11-13 17:37:17,230 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:37:17,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:37:17,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:37:17,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:37:17,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-13 17:37:17,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:37:17,308 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-13 17:37:17,309 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-13 17:37:17,309 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-13 17:37:17,310 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-13 17:37:17,310 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-13 17:37:17,311 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2021-11-13 17:37:17,311 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_destroy [2021-11-13 17:37:17,311 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_append [2021-11-13 17:37:17,311 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-13 17:37:17,311 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-13 17:37:17,311 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-13 17:37:17,312 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-13 17:37:17,312 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-13 17:37:17,312 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-13 17:37:17,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:37:17,312 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-13 17:37:17,312 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-13 17:37:17,312 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-13 17:37:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-13 17:37:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-13 17:37:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-13 17:37:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-13 17:37:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-13 17:37:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-13 17:37:17,313 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-13 17:37:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-13 17:37:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-13 17:37:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-13 17:37:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-13 17:37:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-13 17:37:17,314 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-13 17:37:17,315 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-13 17:37:17,315 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-13 17:37:17,315 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-13 17:37:17,315 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-13 17:37:17,315 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-13 17:37:17,315 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-13 17:37:17,315 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-13 17:37:17,316 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-13 17:37:17,316 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-13 17:37:17,316 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-13 17:37:17,316 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-13 17:37:17,316 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-13 17:37:17,316 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-13 17:37:17,317 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-13 17:37:17,318 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-13 17:37:17,318 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-13 17:37:17,318 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-13 17:37:17,318 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-13 17:37:17,318 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-13 17:37:17,319 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-13 17:37:17,319 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-13 17:37:17,319 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-13 17:37:17,319 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-13 17:37:17,319 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-13 17:37:17,319 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-13 17:37:17,320 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-13 17:37:17,320 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-13 17:37:17,320 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-13 17:37:17,320 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-13 17:37:17,321 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-13 17:37:17,321 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-13 17:37:17,322 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-13 17:37:17,322 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-13 17:37:17,323 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-13 17:37:17,323 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-13 17:37:17,323 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-13 17:37:17,323 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-13 17:37:17,323 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-13 17:37:17,324 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-13 17:37:17,324 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-13 17:37:17,324 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-13 17:37:17,324 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-13 17:37:17,324 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-13 17:37:17,324 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-13 17:37:17,324 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-13 17:37:17,325 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-13 17:37:17,325 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-13 17:37:17,326 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-13 17:37:17,326 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-13 17:37:17,326 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-13 17:37:17,326 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-13 17:37:17,326 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-13 17:37:17,326 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-13 17:37:17,326 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-13 17:37:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-13 17:37:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-13 17:37:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-13 17:37:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-13 17:37:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-13 17:37:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-13 17:37:17,327 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-13 17:37:17,328 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-13 17:37:17,328 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-13 17:37:17,328 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-13 17:37:17,328 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-13 17:37:17,328 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-13 17:37:17,328 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-13 17:37:17,328 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-13 17:37:17,329 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-13 17:37:17,329 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-13 17:37:17,329 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-13 17:37:17,329 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-13 17:37:17,329 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-13 17:37:17,330 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-13 17:37:17,330 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-13 17:37:17,330 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-13 17:37:17,331 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-13 17:37:17,331 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-13 17:37:17,331 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-13 17:37:17,331 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-13 17:37:17,331 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-13 17:37:17,331 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-13 17:37:17,331 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-13 17:37:17,332 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-13 17:37:17,332 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-13 17:37:17,332 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-13 17:37:17,332 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-13 17:37:17,332 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-13 17:37:17,333 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-13 17:37:17,333 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-13 17:37:17,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 17:37:17,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 17:37:17,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 17:37:17,336 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2021-11-13 17:37:17,337 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_destroy [2021-11-13 17:37:17,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 17:37:17,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 17:37:17,339 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_append [2021-11-13 17:37:17,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-13 17:37:17,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 17:37:17,340 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 17:37:17,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-13 17:37:17,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:37:17,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:37:17,668 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-13 17:37:18,061 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:37:18,062 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-13 17:37:18,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:37:18 BoogieIcfgContainer [2021-11-13 17:37:18,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:37:18,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:37:18,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:37:18,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:37:18,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:37:16" (1/3) ... [2021-11-13 17:37:18,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d12fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:37:18, skipping insertion in model container [2021-11-13 17:37:18,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:37:17" (2/3) ... [2021-11-13 17:37:18,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14d12fcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:37:18, skipping insertion in model container [2021-11-13 17:37:18,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:37:18" (3/3) ... [2021-11-13 17:37:18,074 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_append_equal.i [2021-11-13 17:37:18,079 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:37:18,103 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2021-11-13 17:37:18,161 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:37:18,168 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 17:37:18,168 INFO L340 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2021-11-13 17:37:18,187 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 117 states have internal predecessors, (130), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-13 17:37:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 17:37:18,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:18,196 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:18,197 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:37:18,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:18,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1871421808, now seen corresponding path program 1 times [2021-11-13 17:37:18,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:18,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859208387] [2021-11-13 17:37:18,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:18,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:18,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:37:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:18,458 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 17:37:18,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:18,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859208387] [2021-11-13 17:37:18,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859208387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:18,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:37:18,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:37:18,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462336251] [2021-11-13 17:37:18,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:18,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:37:18,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:18,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:37:18,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:37:18,507 INFO L87 Difference]: Start difference. First operand has 133 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 117 states have internal predecessors, (130), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-13 17:37:18,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:18,885 INFO L93 Difference]: Finished difference Result 150 states and 160 transitions. [2021-11-13 17:37:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:37:18,888 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 17:37:18,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:18,908 INFO L225 Difference]: With dead ends: 150 [2021-11-13 17:37:18,908 INFO L226 Difference]: Without dead ends: 144 [2021-11-13 17:37:18,910 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 17:37:18,915 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 35 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 232.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.97ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 292.21ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:18,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 181 Invalid, 219 Unknown, 0 Unchecked, 19.97ms Time], IncrementalHoareTripleChecker [9 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 292.21ms Time] [2021-11-13 17:37:18,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-13 17:37:18,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 125. [2021-11-13 17:37:18,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 64 states have (on average 1.84375) internal successors, (118), 111 states have internal predecessors, (118), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 17:37:19,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 133 transitions. [2021-11-13 17:37:19,013 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 133 transitions. Word has length 12 [2021-11-13 17:37:19,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:19,013 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 133 transitions. [2021-11-13 17:37:19,014 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 17:37:19,014 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 133 transitions. [2021-11-13 17:37:19,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-13 17:37:19,015 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:19,015 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:19,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:37:19,015 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:37:19,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:19,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1871421807, now seen corresponding path program 1 times [2021-11-13 17:37:19,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:19,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091811903] [2021-11-13 17:37:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:19,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:19,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:37:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:19,197 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 17:37:19,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:19,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091811903] [2021-11-13 17:37:19,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091811903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:19,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:37:19,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:37:19,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610145348] [2021-11-13 17:37:19,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:19,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:37:19,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:19,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:37:19,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:37:19,204 INFO L87 Difference]: Start difference. First operand 125 states and 133 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 17:37:19,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:19,480 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2021-11-13 17:37:19,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:37:19,480 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 17:37:19,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:19,485 INFO L225 Difference]: With dead ends: 142 [2021-11-13 17:37:19,485 INFO L226 Difference]: Without dead ends: 142 [2021-11-13 17:37:19,490 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 17:37:19,493 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 30 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 177.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.66ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 228.11ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:19,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 173 Invalid, 205 Unknown, 0 Unchecked, 5.66ms Time], IncrementalHoareTripleChecker [8 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 228.11ms Time] [2021-11-13 17:37:19,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-13 17:37:19,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 123. [2021-11-13 17:37:19,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 64 states have (on average 1.8125) internal successors, (116), 109 states have internal predecessors, (116), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 17:37:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 131 transitions. [2021-11-13 17:37:19,518 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 131 transitions. Word has length 12 [2021-11-13 17:37:19,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:19,519 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 131 transitions. [2021-11-13 17:37:19,520 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 17:37:19,520 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 131 transitions. [2021-11-13 17:37:19,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-13 17:37:19,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:19,521 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 17:37:19,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:37:19,522 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:37:19,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:19,528 INFO L85 PathProgramCache]: Analyzing trace with hash -695211278, now seen corresponding path program 1 times [2021-11-13 17:37:19,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:19,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966108710] [2021-11-13 17:37:19,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:19,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:19,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:37:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:19,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:37:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:19,650 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 17:37:19,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:19,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966108710] [2021-11-13 17:37:19,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966108710] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:19,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:37:19,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:37:19,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709555614] [2021-11-13 17:37:19,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:19,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:37:19,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:19,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:37:19,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:37:19,653 INFO L87 Difference]: Start difference. First operand 123 states and 131 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 17:37:20,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:20,066 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2021-11-13 17:37:20,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:37:20,067 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 17:37:20,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:20,068 INFO L225 Difference]: With dead ends: 149 [2021-11-13 17:37:20,068 INFO L226 Difference]: Without dead ends: 149 [2021-11-13 17:37:20,069 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 17:37:20,070 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 103 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 246.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.33ms SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 298.21ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:20,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 388 Invalid, 337 Unknown, 0 Unchecked, 7.33ms Time], IncrementalHoareTripleChecker [20 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 298.21ms Time] [2021-11-13 17:37:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-13 17:37:20,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 124. [2021-11-13 17:37:20,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 65 states have (on average 1.8) internal successors, (117), 110 states have internal predecessors, (117), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 17:37:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2021-11-13 17:37:20,081 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 19 [2021-11-13 17:37:20,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:20,081 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2021-11-13 17:37:20,082 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 17:37:20,082 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2021-11-13 17:37:20,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 17:37:20,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:20,083 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 17:37:20,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:37:20,083 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_circular_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:37:20,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:20,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1707341137, now seen corresponding path program 1 times [2021-11-13 17:37:20,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:20,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030164621] [2021-11-13 17:37:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:20,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:20,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:37:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:20,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:37:20,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:20,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:37:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:20,206 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 17:37:20,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:20,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030164621] [2021-11-13 17:37:20,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030164621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:20,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:37:20,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:37:20,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421921233] [2021-11-13 17:37:20,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:20,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:37:20,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:20,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:37:20,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:37:20,209 INFO L87 Difference]: Start difference. First operand 124 states and 132 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 17:37:20,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:20,660 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2021-11-13 17:37:20,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:37:20,660 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 17:37:20,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:20,662 INFO L225 Difference]: With dead ends: 143 [2021-11-13 17:37:20,662 INFO L226 Difference]: Without dead ends: 143 [2021-11-13 17:37:20,662 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 17:37:20,664 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 65 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 328.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.30ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 399.89ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:20,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 337 Invalid, 551 Unknown, 0 Unchecked, 6.30ms Time], IncrementalHoareTripleChecker [14 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 399.89ms Time] [2021-11-13 17:37:20,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-13 17:37:20,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 123. [2021-11-13 17:37:20,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 65 states have (on average 1.7846153846153847) internal successors, (116), 109 states have internal predecessors, (116), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 17:37:20,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 131 transitions. [2021-11-13 17:37:20,675 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 131 transitions. Word has length 28 [2021-11-13 17:37:20,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:20,676 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 131 transitions. [2021-11-13 17:37:20,676 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 17:37:20,676 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 131 transitions. [2021-11-13 17:37:20,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 17:37:20,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:20,677 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 17:37:20,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 17:37:20,678 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_circular_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:37:20,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:20,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1707341138, now seen corresponding path program 1 times [2021-11-13 17:37:20,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:20,679 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032328356] [2021-11-13 17:37:20,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:20,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:20,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:37:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:20,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:37:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:20,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:37:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:20,896 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 17:37:20,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:20,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032328356] [2021-11-13 17:37:20,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032328356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:20,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:37:20,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:37:20,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392817557] [2021-11-13 17:37:20,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:20,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:37:20,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:20,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:37:20,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:37:20,899 INFO L87 Difference]: Start difference. First operand 123 states and 131 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 17:37:21,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:21,323 INFO L93 Difference]: Finished difference Result 142 states and 152 transitions. [2021-11-13 17:37:21,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:37:21,323 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 17:37:21,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:21,324 INFO L225 Difference]: With dead ends: 142 [2021-11-13 17:37:21,324 INFO L226 Difference]: Without dead ends: 142 [2021-11-13 17:37:21,325 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 17:37:21,326 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 63 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 297.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.93ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 364.72ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:21,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 345 Invalid, 536 Unknown, 0 Unchecked, 5.93ms Time], IncrementalHoareTripleChecker [13 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 364.72ms Time] [2021-11-13 17:37:21,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-13 17:37:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 122. [2021-11-13 17:37:21,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 65 states have (on average 1.7692307692307692) internal successors, (115), 108 states have internal predecessors, (115), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 17:37:21,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 130 transitions. [2021-11-13 17:37:21,333 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 130 transitions. Word has length 28 [2021-11-13 17:37:21,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:21,333 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 130 transitions. [2021-11-13 17:37:21,333 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 17:37:21,333 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 130 transitions. [2021-11-13 17:37:21,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 17:37:21,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:21,334 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 17:37:21,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 17:37:21,335 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:37:21,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:21,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1897710560, now seen corresponding path program 1 times [2021-11-13 17:37:21,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:21,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000851188] [2021-11-13 17:37:21,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:21,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:21,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:37:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:21,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:37:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:21,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:37:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:21,531 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 17:37:21,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:21,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000851188] [2021-11-13 17:37:21,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000851188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:37:21,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337433014] [2021-11-13 17:37:21,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:21,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:37:21,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:37:21,538 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:37:21,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:37:21,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:21,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 17:37:21,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:37:21,761 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 17:37:21,952 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-13 17:37:21,953 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 17:37:22,042 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 17:37:22,042 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:37:22,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337433014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:22,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:37:22,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9] total 14 [2021-11-13 17:37:22,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16002342] [2021-11-13 17:37:22,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:22,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 17:37:22,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:22,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 17:37:22,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:37:22,045 INFO L87 Difference]: Start difference. First operand 122 states and 130 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 17:37:22,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:22,290 INFO L93 Difference]: Finished difference Result 142 states and 152 transitions. [2021-11-13 17:37:22,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 17:37:22,291 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 17:37:22,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:22,292 INFO L225 Difference]: With dead ends: 142 [2021-11-13 17:37:22,292 INFO L226 Difference]: Without dead ends: 142 [2021-11-13 17:37:22,293 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 17:37:22,294 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 42 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 160.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.23ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 196.52ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:22,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 433 Invalid, 344 Unknown, 0 Unchecked, 4.23ms Time], IncrementalHoareTripleChecker [11 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 196.52ms Time] [2021-11-13 17:37:22,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-13 17:37:22,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 121. [2021-11-13 17:37:22,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 65 states have (on average 1.7538461538461538) internal successors, (114), 107 states have internal predecessors, (114), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 17:37:22,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 129 transitions. [2021-11-13 17:37:22,300 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 129 transitions. Word has length 31 [2021-11-13 17:37:22,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:22,300 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 129 transitions. [2021-11-13 17:37:22,300 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 17:37:22,301 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 129 transitions. [2021-11-13 17:37:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 17:37:22,302 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:22,302 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 17:37:22,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:37:22,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:37:22,521 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting sll_circular_createErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:37:22,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:22,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1897710559, now seen corresponding path program 1 times [2021-11-13 17:37:22,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:22,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381868021] [2021-11-13 17:37:22,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:22,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:22,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:37:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:22,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:37:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:22,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-11-13 17:37:22,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:22,743 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 17:37:22,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:22,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381868021] [2021-11-13 17:37:22,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381868021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:37:22,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055203188] [2021-11-13 17:37:22,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:22,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:37:22,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:37:22,749 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:37:22,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:37:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:22,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-13 17:37:22,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:37:22,937 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 17:37:23,161 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-11-13 17:37:23,162 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 17:37:23,224 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 17:37:23,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:37:23,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055203188] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:37:23,352 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:37:23,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-13 17:37:23,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311828556] [2021-11-13 17:37:23,352 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:37:23,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 17:37:23,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:23,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 17:37:23,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-13 17:37:23,353 INFO L87 Difference]: Start difference. First operand 121 states and 129 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 17:37:24,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:24,138 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2021-11-13 17:37:24,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 17:37:24,139 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 17:37:24,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:24,140 INFO L225 Difference]: With dead ends: 140 [2021-11-13 17:37:24,140 INFO L226 Difference]: Without dead ends: 140 [2021-11-13 17:37:24,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-11-13 17:37:24,142 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 121 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 524.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.05ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 625.76ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:24,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 500 Invalid, 783 Unknown, 0 Unchecked, 8.05ms Time], IncrementalHoareTripleChecker [23 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 625.76ms Time] [2021-11-13 17:37:24,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-13 17:37:24,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 120. [2021-11-13 17:37:24,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 65 states have (on average 1.7384615384615385) internal successors, (113), 106 states have internal predecessors, (113), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 17:37:24,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2021-11-13 17:37:24,149 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 31 [2021-11-13 17:37:24,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:24,150 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2021-11-13 17:37:24,150 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 17:37:24,150 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2021-11-13 17:37:24,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-13 17:37:24,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:24,153 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:24,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-13 17:37:24,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-13 17:37:24,373 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting sll_circular_appendErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:37:24,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:24,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1841249511, now seen corresponding path program 1 times [2021-11-13 17:37:24,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:24,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801487748] [2021-11-13 17:37:24,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:24,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:24,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:24,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:37:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:24,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:37:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:24,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:37:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:24,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:37:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:24,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 17:37:24,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:37:24,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:24,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801487748] [2021-11-13 17:37:24,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801487748] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:37:24,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94523226] [2021-11-13 17:37:24,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:24,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:37:24,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:37:24,957 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:37:24,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:37:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:25,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 17:37:25,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:37:25,120 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 17:37:25,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-13 17:37:25,671 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-13 17:37:25,671 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 17:37:25,901 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-13 17:37:25,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 27 [2021-11-13 17:37:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:37:25,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:37:36,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94523226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:37:36,343 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:37:36,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2021-11-13 17:37:36,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273335202] [2021-11-13 17:37:36,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:37:36,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-13 17:37:36,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:36,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-13 17:37:36,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=414, Unknown=2, NotChecked=0, Total=506 [2021-11-13 17:37:36,346 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 17 states have internal predecessors, (56), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-13 17:37:37,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:37,221 INFO L93 Difference]: Finished difference Result 191 states and 205 transitions. [2021-11-13 17:37:37,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 17:37:37,222 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 17 states have internal predecessors, (56), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 47 [2021-11-13 17:37:37,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:37,224 INFO L225 Difference]: With dead ends: 191 [2021-11-13 17:37:37,224 INFO L226 Difference]: Without dead ends: 191 [2021-11-13 17:37:37,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=171, Invalid=757, Unknown=2, NotChecked=0, Total=930 [2021-11-13 17:37:37,225 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 257 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 435.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.10ms SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 508.42ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:37,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 495 Invalid, 837 Unknown, 0 Unchecked, 8.10ms Time], IncrementalHoareTripleChecker [46 Valid, 539 Invalid, 0 Unknown, 252 Unchecked, 508.42ms Time] [2021-11-13 17:37:37,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-13 17:37:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 155. [2021-11-13 17:37:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 97 states have (on average 1.6391752577319587) internal successors, (159), 136 states have internal predecessors, (159), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 17:37:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2021-11-13 17:37:37,233 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 47 [2021-11-13 17:37:37,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:37,234 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2021-11-13 17:37:37,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 17 states have internal predecessors, (56), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-13 17:37:37,234 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2021-11-13 17:37:37,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-13 17:37:37,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:37,236 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:37,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-13 17:37:37,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:37:37,455 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_circular_appendErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:37:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:37,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1841249512, now seen corresponding path program 1 times [2021-11-13 17:37:37,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:37,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383957847] [2021-11-13 17:37:37,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:37,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:37,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:37:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:37,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:37:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:37,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:37:37,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:37,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:37:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:38,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 17:37:38,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:37:38,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:38,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383957847] [2021-11-13 17:37:38,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383957847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:37:38,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75664260] [2021-11-13 17:37:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:38,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:37:38,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:37:38,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:37:38,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:37:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:38,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-13 17:37:38,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:37:38,234 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 17:37:38,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-11-13 17:37:38,658 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-13 17:37:38,659 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 17:37:38,917 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-13 17:37:38,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 31 [2021-11-13 17:37:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:37:39,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:37:39,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75664260] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:37:39,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:37:39,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-11-13 17:37:39,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35938180] [2021-11-13 17:37:39,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:37:39,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 17:37:39,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:39,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 17:37:39,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-11-13 17:37:39,117 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand has 22 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-13 17:37:39,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:39,872 INFO L93 Difference]: Finished difference Result 189 states and 203 transitions. [2021-11-13 17:37:39,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-13 17:37:39,873 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 47 [2021-11-13 17:37:39,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:39,874 INFO L225 Difference]: With dead ends: 189 [2021-11-13 17:37:39,874 INFO L226 Difference]: Without dead ends: 189 [2021-11-13 17:37:39,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-11-13 17:37:39,876 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 154 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 533.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.99ms SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 626.52ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:39,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 683 Invalid, 1355 Unknown, 0 Unchecked, 9.99ms Time], IncrementalHoareTripleChecker [25 Valid, 670 Invalid, 0 Unknown, 660 Unchecked, 626.52ms Time] [2021-11-13 17:37:39,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-13 17:37:39,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 155. [2021-11-13 17:37:39,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 97 states have (on average 1.6288659793814433) internal successors, (158), 136 states have internal predecessors, (158), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 17:37:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 182 transitions. [2021-11-13 17:37:39,887 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 182 transitions. Word has length 47 [2021-11-13 17:37:39,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:39,887 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 182 transitions. [2021-11-13 17:37:39,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 9 states have call successors, (13), 6 states have call predecessors, (13), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-13 17:37:39,888 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 182 transitions. [2021-11-13 17:37:39,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-13 17:37:39,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:39,890 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:39,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:37:40,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:37:40,105 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_circular_appendErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:37:40,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:40,106 INFO L85 PathProgramCache]: Analyzing trace with hash -85745624, now seen corresponding path program 1 times [2021-11-13 17:37:40,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:40,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249981854] [2021-11-13 17:37:40,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:40,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:40,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:37:40,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:40,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:37:40,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:40,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:37:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:40,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:37:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:40,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 17:37:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 17:37:40,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:40,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249981854] [2021-11-13 17:37:40,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249981854] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:40,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:37:40,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:37:40,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137351309] [2021-11-13 17:37:40,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:40,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:37:40,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:40,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:37:40,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:37:40,245 INFO L87 Difference]: Start difference. First operand 155 states and 182 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 17:37:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:40,648 INFO L93 Difference]: Finished difference Result 172 states and 198 transitions. [2021-11-13 17:37:40,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:37:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2021-11-13 17:37:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:40,651 INFO L225 Difference]: With dead ends: 172 [2021-11-13 17:37:40,651 INFO L226 Difference]: Without dead ends: 172 [2021-11-13 17:37:40,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 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 17:37:40,652 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 87 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 295.37ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.05ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 358.76ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:40,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 289 Invalid, 493 Unknown, 0 Unchecked, 5.05ms Time], IncrementalHoareTripleChecker [13 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 358.76ms Time] [2021-11-13 17:37:40,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-13 17:37:40,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 153. [2021-11-13 17:37:40,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 97 states have (on average 1.5876288659793814) internal successors, (154), 134 states have internal predecessors, (154), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 17:37:40,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 178 transitions. [2021-11-13 17:37:40,661 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 178 transitions. Word has length 49 [2021-11-13 17:37:40,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:40,661 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 178 transitions. [2021-11-13 17:37:40,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 5 states have internal predecessors, (29), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 17:37:40,662 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 178 transitions. [2021-11-13 17:37:40,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-13 17:37:40,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:40,668 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:40,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 17:37:40,669 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sll_circular_appendErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:37:40,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:40,669 INFO L85 PathProgramCache]: Analyzing trace with hash -85745623, now seen corresponding path program 1 times [2021-11-13 17:37:40,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:40,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475149814] [2021-11-13 17:37:40,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:40,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:40,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:37:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:40,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:37:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:40,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:37:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:40,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:37:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:40,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 17:37:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 17:37:40,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:40,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475149814] [2021-11-13 17:37:40,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475149814] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:40,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:37:40,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:37:40,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343123003] [2021-11-13 17:37:40,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:40,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:37:40,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:40,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:37:40,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:37:40,862 INFO L87 Difference]: Start difference. First operand 153 states and 178 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 17:37:41,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:41,288 INFO L93 Difference]: Finished difference Result 170 states and 194 transitions. [2021-11-13 17:37:41,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:37:41,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2021-11-13 17:37:41,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:41,290 INFO L225 Difference]: With dead ends: 170 [2021-11-13 17:37:41,290 INFO L226 Difference]: Without dead ends: 170 [2021-11-13 17:37:41,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 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 17:37:41,291 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 84 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 297.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.93ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 376.42ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:41,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 281 Invalid, 488 Unknown, 0 Unchecked, 4.93ms Time], IncrementalHoareTripleChecker [12 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 376.42ms Time] [2021-11-13 17:37:41,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-13 17:37:41,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2021-11-13 17:37:41,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 97 states have (on average 1.5463917525773196) internal successors, (150), 132 states have internal predecessors, (150), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 17:37:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 174 transitions. [2021-11-13 17:37:41,298 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 174 transitions. Word has length 49 [2021-11-13 17:37:41,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:41,298 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 174 transitions. [2021-11-13 17:37:41,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 17:37:41,299 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 174 transitions. [2021-11-13 17:37:41,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-13 17:37:41,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:41,300 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:41,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 17:37:41,300 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_circular_appendErr6REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:37:41,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:41,300 INFO L85 PathProgramCache]: Analyzing trace with hash -85745368, now seen corresponding path program 1 times [2021-11-13 17:37:41,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:41,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519860651] [2021-11-13 17:37:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:41,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:41,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:37:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:41,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:37:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:41,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:37:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:41,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:37:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:41,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 17:37:41,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:41,386 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 17:37:41,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:41,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519860651] [2021-11-13 17:37:41,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519860651] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:41,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:37:41,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:37:41,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568237175] [2021-11-13 17:37:41,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:41,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:37:41,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:41,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:37:41,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:37:41,389 INFO L87 Difference]: Start difference. First operand 151 states and 174 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 17:37:41,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:41,636 INFO L93 Difference]: Finished difference Result 168 states and 192 transitions. [2021-11-13 17:37:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:37:41,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2021-11-13 17:37:41,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:41,639 INFO L225 Difference]: With dead ends: 168 [2021-11-13 17:37:41,639 INFO L226 Difference]: Without dead ends: 168 [2021-11-13 17:37:41,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:37:41,640 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 78 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 182.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.12ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 219.07ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:41,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 161 Invalid, 257 Unknown, 0 Unchecked, 2.12ms Time], IncrementalHoareTripleChecker [12 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 219.07ms Time] [2021-11-13 17:37:41,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-13 17:37:41,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2021-11-13 17:37:41,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 97 states have (on average 1.5257731958762886) internal successors, (148), 130 states have internal predecessors, (148), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 17:37:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 172 transitions. [2021-11-13 17:37:41,647 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 172 transitions. Word has length 49 [2021-11-13 17:37:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:41,648 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 172 transitions. [2021-11-13 17:37:41,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 17:37:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 172 transitions. [2021-11-13 17:37:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-13 17:37:41,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:41,649 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:41,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 17:37:41,649 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_circular_appendErr7REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:37:41,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:41,650 INFO L85 PathProgramCache]: Analyzing trace with hash -85745367, now seen corresponding path program 1 times [2021-11-13 17:37:41,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:41,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998920021] [2021-11-13 17:37:41,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:41,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:41,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:37:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:41,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:37:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:41,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:37:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:41,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:37:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:41,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 17:37:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 17:37:41,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:41,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998920021] [2021-11-13 17:37:41,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998920021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:41,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:37:41,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:37:41,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780355909] [2021-11-13 17:37:41,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:41,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:37:41,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:41,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:37:41,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:37:41,778 INFO L87 Difference]: Start difference. First operand 149 states and 172 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-13 17:37:42,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:42,140 INFO L93 Difference]: Finished difference Result 164 states and 184 transitions. [2021-11-13 17:37:42,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:37:42,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2021-11-13 17:37:42,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:42,143 INFO L225 Difference]: With dead ends: 164 [2021-11-13 17:37:42,143 INFO L226 Difference]: Without dead ends: 164 [2021-11-13 17:37:42,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:37:42,144 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 150 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 221.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.23ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 264.15ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:42,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 245 Invalid, 333 Unknown, 0 Unchecked, 4.23ms Time], IncrementalHoareTripleChecker [15 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 264.15ms Time] [2021-11-13 17:37:42,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-13 17:37:42,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 145. [2021-11-13 17:37:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 97 states have (on average 1.443298969072165) internal successors, (140), 126 states have internal predecessors, (140), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 17:37:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 164 transitions. [2021-11-13 17:37:42,163 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 164 transitions. Word has length 49 [2021-11-13 17:37:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:42,164 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 164 transitions. [2021-11-13 17:37:42,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-13 17:37:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 164 transitions. [2021-11-13 17:37:42,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 17:37:42,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:42,165 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:42,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 17:37:42,165 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_circular_appendErr8REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:37:42,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:42,166 INFO L85 PathProgramCache]: Analyzing trace with hash -796919379, now seen corresponding path program 1 times [2021-11-13 17:37:42,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:42,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840608912] [2021-11-13 17:37:42,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:42,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:42,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:37:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:42,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:37:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:42,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:37:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:42,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:37:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:42,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 17:37:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 17:37:42,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:42,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840608912] [2021-11-13 17:37:42,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840608912] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:37:42,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651718767] [2021-11-13 17:37:42,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:42,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:37:42,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:37:42,675 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:37:42,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:37:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:42,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-13 17:37:42,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:37:43,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-13 17:37:50,724 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-13 17:37:50,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 31 [2021-11-13 17:37:50,737 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:37:50,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-13 17:37:50,889 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:37:50,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-11-13 17:37:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 17:37:50,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:37:50,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651718767] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:37:50,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:37:50,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [20] total 30 [2021-11-13 17:37:50,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486889623] [2021-11-13 17:37:50,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:37:50,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 17:37:50,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:37:50,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 17:37:50,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=841, Unknown=7, NotChecked=0, Total=930 [2021-11-13 17:37:50,916 INFO L87 Difference]: Start difference. First operand 145 states and 164 transitions. Second operand has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-13 17:37:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:37:53,620 INFO L93 Difference]: Finished difference Result 169 states and 188 transitions. [2021-11-13 17:37:53,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 17:37:53,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 51 [2021-11-13 17:37:53,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:37:53,623 INFO L225 Difference]: With dead ends: 169 [2021-11-13 17:37:53,623 INFO L226 Difference]: Without dead ends: 169 [2021-11-13 17:37:53,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=108, Invalid=1073, Unknown=9, NotChecked=0, Total=1190 [2021-11-13 17:37:53,624 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 72 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 441.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.18ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 518.89ms IncrementalHoareTripleChecker+Time [2021-11-13 17:37:53,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 520 Invalid, 995 Unknown, 0 Unchecked, 6.18ms Time], IncrementalHoareTripleChecker [12 Valid, 789 Invalid, 0 Unknown, 194 Unchecked, 518.89ms Time] [2021-11-13 17:37:53,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-13 17:37:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 145. [2021-11-13 17:37:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 99 states have (on average 1.4141414141414141) internal successors, (140), 126 states have internal predecessors, (140), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 17:37:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 164 transitions. [2021-11-13 17:37:53,632 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 164 transitions. Word has length 51 [2021-11-13 17:37:53,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:37:53,632 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 164 transitions. [2021-11-13 17:37:53,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-13 17:37:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 164 transitions. [2021-11-13 17:37:53,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-13 17:37:53,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:37:53,633 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:37:53,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 17:37:53,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-13 17:37:53,854 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_circular_appendErr9REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:37:53,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:37:53,854 INFO L85 PathProgramCache]: Analyzing trace with hash -796919378, now seen corresponding path program 1 times [2021-11-13 17:37:53,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:37:53,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120079696] [2021-11-13 17:37:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:53,855 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:37:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:54,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:37:54,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:54,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:37:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:54,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:37:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:54,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:37:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:54,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 17:37:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:54,670 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 17:37:54,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:37:54,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120079696] [2021-11-13 17:37:54,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120079696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:37:54,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356960108] [2021-11-13 17:37:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:37:54,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:37:54,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:37:54,681 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:37:54,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 17:37:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:37:54,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-13 17:37:54,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:37:54,889 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 17:37:55,455 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 17:37:55,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-13 17:37:59,390 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-13 17:37:59,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 74 [2021-11-13 17:37:59,419 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-13 17:37:59,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 55 [2021-11-13 17:37:59,432 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-13 17:37:59,432 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 56 treesize of output 58 [2021-11-13 17:37:59,441 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-13 17:37:59,441 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 55 treesize of output 55 [2021-11-13 17:37:59,657 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:37:59,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 47 [2021-11-13 17:37:59,664 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:37:59,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-11-13 17:37:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:37:59,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:38:02,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356960108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:38:02,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:38:02,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2021-11-13 17:38:02,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188438011] [2021-11-13 17:38:02,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:38:02,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 17:38:02,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:38:02,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 17:38:02,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1439, Unknown=2, NotChecked=0, Total=1560 [2021-11-13 17:38:02,228 INFO L87 Difference]: Start difference. First operand 145 states and 164 transitions. Second operand has 36 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 7 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-13 17:38:07,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:38:07,733 INFO L93 Difference]: Finished difference Result 164 states and 182 transitions. [2021-11-13 17:38:07,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 17:38:07,733 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 7 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 51 [2021-11-13 17:38:07,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:38:07,736 INFO L225 Difference]: With dead ends: 164 [2021-11-13 17:38:07,736 INFO L226 Difference]: Without dead ends: 164 [2021-11-13 17:38:07,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=190, Invalid=2158, Unknown=4, NotChecked=0, Total=2352 [2021-11-13 17:38:07,738 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 136 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1458 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 889.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.94ms SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 1066.11ms IncrementalHoareTripleChecker+Time [2021-11-13 17:38:07,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 738 Invalid, 1577 Unknown, 0 Unchecked, 9.94ms Time], IncrementalHoareTripleChecker [27 Valid, 1458 Invalid, 0 Unknown, 92 Unchecked, 1066.11ms Time] [2021-11-13 17:38:07,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-13 17:38:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 145. [2021-11-13 17:38:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 99 states have (on average 1.393939393939394) internal successors, (138), 126 states have internal predecessors, (138), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 17:38:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 162 transitions. [2021-11-13 17:38:07,745 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 162 transitions. Word has length 51 [2021-11-13 17:38:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:38:07,745 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 162 transitions. [2021-11-13 17:38:07,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 7 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-13 17:38:07,746 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 162 transitions. [2021-11-13 17:38:07,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-13 17:38:07,746 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:38:07,747 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:38:07,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-13 17:38:07,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:38:07,965 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:38:07,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:38:07,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1571970601, now seen corresponding path program 1 times [2021-11-13 17:38:07,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:38:07,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561117044] [2021-11-13 17:38:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:38:07,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:38:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:08,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:38:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:08,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:38:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:08,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:38:08,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:08,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:38:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:08,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-13 17:38:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:08,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:38:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 17:38:08,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:38:08,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561117044] [2021-11-13 17:38:08,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561117044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:38:08,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:38:08,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:38:08,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954500958] [2021-11-13 17:38:08,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:38:08,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:38:08,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:38:08,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:38:08,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:38:08,101 INFO L87 Difference]: Start difference. First operand 145 states and 162 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 17:38:08,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:38:08,438 INFO L93 Difference]: Finished difference Result 164 states and 182 transitions. [2021-11-13 17:38:08,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:38:08,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2021-11-13 17:38:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:38:08,440 INFO L225 Difference]: With dead ends: 164 [2021-11-13 17:38:08,440 INFO L226 Difference]: Without dead ends: 164 [2021-11-13 17:38:08,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-13 17:38:08,441 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 135 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 239.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.18ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 287.42ms IncrementalHoareTripleChecker+Time [2021-11-13 17:38:08,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 207 Invalid, 360 Unknown, 0 Unchecked, 3.18ms Time], IncrementalHoareTripleChecker [13 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 287.42ms Time] [2021-11-13 17:38:08,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-13 17:38:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 144. [2021-11-13 17:38:08,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 99 states have (on average 1.3838383838383839) internal successors, (137), 125 states have internal predecessors, (137), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 17:38:08,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 161 transitions. [2021-11-13 17:38:08,447 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 161 transitions. Word has length 53 [2021-11-13 17:38:08,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:38:08,447 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 161 transitions. [2021-11-13 17:38:08,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 17:38:08,447 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 161 transitions. [2021-11-13 17:38:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-13 17:38:08,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:38:08,448 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:38:08,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 17:38:08,448 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:38:08,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:38:08,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1571970600, now seen corresponding path program 1 times [2021-11-13 17:38:08,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:38:08,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982608747] [2021-11-13 17:38:08,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:38:08,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:38:08,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:08,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:38:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:08,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:38:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:08,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:38:08,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:08,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:38:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:08,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-13 17:38:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:08,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:38:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 17:38:08,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:38:08,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982608747] [2021-11-13 17:38:08,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982608747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:38:08,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:38:08,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 17:38:08,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383324451] [2021-11-13 17:38:08,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:38:08,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 17:38:08,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:38:08,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 17:38:08,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:38:08,617 INFO L87 Difference]: Start difference. First operand 144 states and 161 transitions. Second operand has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 17:38:08,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:38:08,963 INFO L93 Difference]: Finished difference Result 160 states and 178 transitions. [2021-11-13 17:38:08,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:38:08,963 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 53 [2021-11-13 17:38:08,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:38:08,964 INFO L225 Difference]: With dead ends: 160 [2021-11-13 17:38:08,965 INFO L226 Difference]: Without dead ends: 160 [2021-11-13 17:38:08,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-13 17:38:08,966 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 150 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 239.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.26ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 285.57ms IncrementalHoareTripleChecker+Time [2021-11-13 17:38:08,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 210 Invalid, 344 Unknown, 0 Unchecked, 3.26ms Time], IncrementalHoareTripleChecker [16 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 285.57ms Time] [2021-11-13 17:38:08,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-13 17:38:08,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 141. [2021-11-13 17:38:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 99 states have (on average 1.3535353535353536) internal successors, (134), 122 states have internal predecessors, (134), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 17:38:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 158 transitions. [2021-11-13 17:38:09,000 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 158 transitions. Word has length 53 [2021-11-13 17:38:09,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:38:09,001 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 158 transitions. [2021-11-13 17:38:09,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-13 17:38:09,001 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 158 transitions. [2021-11-13 17:38:09,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-13 17:38:09,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:38:09,002 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:38:09,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 17:38:09,002 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_circular_appendErr13REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:38:09,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:38:09,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1554020529, now seen corresponding path program 1 times [2021-11-13 17:38:09,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:38:09,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303839824] [2021-11-13 17:38:09,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:38:09,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:38:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:09,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:38:09,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:09,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:38:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:09,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:38:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:09,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:38:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:09,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 17:38:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 17:38:09,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:38:09,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303839824] [2021-11-13 17:38:09,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303839824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:38:09,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:38:09,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:38:09,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064896062] [2021-11-13 17:38:09,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:38:09,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:38:09,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:38:09,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:38:09,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:38:09,121 INFO L87 Difference]: Start difference. First operand 141 states and 158 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 17:38:09,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:38:09,349 INFO L93 Difference]: Finished difference Result 162 states and 178 transitions. [2021-11-13 17:38:09,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:38:09,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 54 [2021-11-13 17:38:09,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:38:09,351 INFO L225 Difference]: With dead ends: 162 [2021-11-13 17:38:09,351 INFO L226 Difference]: Without dead ends: 162 [2021-11-13 17:38:09,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:38:09,352 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 59 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 170.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.79ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 201.51ms IncrementalHoareTripleChecker+Time [2021-11-13 17:38:09,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 169 Invalid, 227 Unknown, 0 Unchecked, 1.79ms Time], IncrementalHoareTripleChecker [12 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 201.51ms Time] [2021-11-13 17:38:09,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-13 17:38:09,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 139. [2021-11-13 17:38:09,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 99 states have (on average 1.3131313131313131) internal successors, (130), 120 states have internal predecessors, (130), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 17:38:09,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 154 transitions. [2021-11-13 17:38:09,358 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 154 transitions. Word has length 54 [2021-11-13 17:38:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:38:09,359 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 154 transitions. [2021-11-13 17:38:09,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 17:38:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 154 transitions. [2021-11-13 17:38:09,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 17:38:09,360 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:38:09,360 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:38:09,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 17:38:09,360 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:38:09,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:38:09,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1164742683, now seen corresponding path program 1 times [2021-11-13 17:38:09,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:38:09,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088585038] [2021-11-13 17:38:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:38:09,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:38:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:09,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:38:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:09,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:38:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:09,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:38:09,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:09,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:38:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:09,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-13 17:38:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:09,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:38:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:09,571 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 17:38:09,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:38:09,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088585038] [2021-11-13 17:38:09,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088585038] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:38:09,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:38:09,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-13 17:38:09,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177906189] [2021-11-13 17:38:09,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:38:09,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 17:38:09,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:38:09,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 17:38:09,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:38:09,573 INFO L87 Difference]: Start difference. First operand 139 states and 154 transitions. Second operand has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 17:38:10,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:38:10,153 INFO L93 Difference]: Finished difference Result 184 states and 202 transitions. [2021-11-13 17:38:10,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-13 17:38:10,154 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2021-11-13 17:38:10,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:38:10,155 INFO L225 Difference]: With dead ends: 184 [2021-11-13 17:38:10,155 INFO L226 Difference]: Without dead ends: 184 [2021-11-13 17:38:10,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-13 17:38:10,156 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 129 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 388.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.78ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 468.37ms IncrementalHoareTripleChecker+Time [2021-11-13 17:38:10,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 329 Invalid, 695 Unknown, 0 Unchecked, 5.78ms Time], IncrementalHoareTripleChecker [21 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 468.37ms Time] [2021-11-13 17:38:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-13 17:38:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 145. [2021-11-13 17:38:10,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 104 states have (on average 1.2980769230769231) internal successors, (135), 125 states have internal predecessors, (135), 12 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-13 17:38:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2021-11-13 17:38:10,166 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 55 [2021-11-13 17:38:10,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:38:10,167 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2021-11-13 17:38:10,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.090909090909091) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 17:38:10,167 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2021-11-13 17:38:10,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 17:38:10,168 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:38:10,169 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:38:10,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 17:38:10,169 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:38:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:38:10,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1164742684, now seen corresponding path program 1 times [2021-11-13 17:38:10,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:38:10,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480910917] [2021-11-13 17:38:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:38:10,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:38:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:10,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:38:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:10,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:38:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:10,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:38:10,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:10,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:38:10,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:10,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-13 17:38:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:10,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:38:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 17:38:10,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:38:10,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480910917] [2021-11-13 17:38:10,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480910917] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:38:10,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:38:10,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-13 17:38:10,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951795897] [2021-11-13 17:38:10,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:38:10,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 17:38:10,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:38:10,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 17:38:10,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:38:10,446 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 17:38:11,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:38:11,003 INFO L93 Difference]: Finished difference Result 184 states and 204 transitions. [2021-11-13 17:38:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 17:38:11,003 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2021-11-13 17:38:11,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:38:11,004 INFO L225 Difference]: With dead ends: 184 [2021-11-13 17:38:11,005 INFO L226 Difference]: Without dead ends: 184 [2021-11-13 17:38:11,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-13 17:38:11,005 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 124 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 357.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.05ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 426.40ms IncrementalHoareTripleChecker+Time [2021-11-13 17:38:11,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 343 Invalid, 680 Unknown, 0 Unchecked, 5.05ms Time], IncrementalHoareTripleChecker [16 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 426.40ms Time] [2021-11-13 17:38:11,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-13 17:38:11,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 147. [2021-11-13 17:38:11,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 106 states have (on average 1.2924528301886793) internal successors, (137), 127 states have internal predecessors, (137), 12 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-13 17:38:11,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 163 transitions. [2021-11-13 17:38:11,012 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 163 transitions. Word has length 55 [2021-11-13 17:38:11,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:38:11,012 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 163 transitions. [2021-11-13 17:38:11,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-13 17:38:11,013 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 163 transitions. [2021-11-13 17:38:11,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 17:38:11,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:38:11,014 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:38:11,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-13 17:38:11,014 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sll_circular_appendErr8REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:38:11,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:38:11,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1234890366, now seen corresponding path program 1 times [2021-11-13 17:38:11,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:38:11,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157174338] [2021-11-13 17:38:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:38:11,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:38:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:11,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:38:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:11,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:38:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:11,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:38:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:11,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:38:11,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:11,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 17:38:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 17:38:12,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:38:12,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157174338] [2021-11-13 17:38:12,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157174338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:38:12,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437054646] [2021-11-13 17:38:12,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:38:12,226 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:38:12,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:38:12,227 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:38:12,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-13 17:38:12,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:12,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-13 17:38:12,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:38:12,457 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 17:38:12,666 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 17:38:12,666 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 17:38:12,773 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 17:38:12,911 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 17:38:12,912 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 17:38:13,576 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-13 17:38:13,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 38 [2021-11-13 17:38:13,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-13 17:38:16,118 INFO L354 Elim1Store]: treesize reduction 256, result has 10.2 percent of original size [2021-11-13 17:38:16,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 125 treesize of output 97 [2021-11-13 17:38:16,156 INFO L354 Elim1Store]: treesize reduction 92, result has 14.0 percent of original size [2021-11-13 17:38:16,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 98 [2021-11-13 17:38:16,191 INFO L354 Elim1Store]: treesize reduction 92, result has 31.9 percent of original size [2021-11-13 17:38:16,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 118 [2021-11-13 17:38:16,565 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-13 17:38:16,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 111 [2021-11-13 17:38:17,269 INFO L354 Elim1Store]: treesize reduction 65, result has 5.8 percent of original size [2021-11-13 17:38:17,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 52 [2021-11-13 17:38:17,453 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:38:17,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:38:17,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437054646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:38:17,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:38:17,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 52 [2021-11-13 17:38:17,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997344399] [2021-11-13 17:38:17,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:38:17,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-13 17:38:17,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:38:17,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-13 17:38:17,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2702, Unknown=1, NotChecked=0, Total=2862 [2021-11-13 17:38:17,706 INFO L87 Difference]: Start difference. First operand 147 states and 163 transitions. Second operand has 53 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 42 states have internal predecessors, (82), 8 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-13 17:38:23,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:38:23,193 INFO L93 Difference]: Finished difference Result 173 states and 192 transitions. [2021-11-13 17:38:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-13 17:38:23,201 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 42 states have internal predecessors, (82), 8 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 56 [2021-11-13 17:38:23,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:38:23,202 INFO L225 Difference]: With dead ends: 173 [2021-11-13 17:38:23,203 INFO L226 Difference]: Without dead ends: 173 [2021-11-13 17:38:23,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=242, Invalid=4045, Unknown=3, NotChecked=0, Total=4290 [2021-11-13 17:38:23,205 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 65 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 707.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1374 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.20ms SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 554 IncrementalHoareTripleChecker+Unchecked, 882.98ms IncrementalHoareTripleChecker+Time [2021-11-13 17:38:23,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1374 Invalid, 1988 Unknown, 0 Unchecked, 8.20ms Time], IncrementalHoareTripleChecker [38 Valid, 1396 Invalid, 0 Unknown, 554 Unchecked, 882.98ms Time] [2021-11-13 17:38:23,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-13 17:38:23,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 152. [2021-11-13 17:38:23,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 111 states have (on average 1.2972972972972974) internal successors, (144), 132 states have internal predecessors, (144), 12 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-13 17:38:23,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 170 transitions. [2021-11-13 17:38:23,212 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 170 transitions. Word has length 56 [2021-11-13 17:38:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:38:23,213 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 170 transitions. [2021-11-13 17:38:23,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 42 states have internal predecessors, (82), 8 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-13 17:38:23,213 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 170 transitions. [2021-11-13 17:38:23,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 17:38:23,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:38:23,214 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:38:23,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-13 17:38:23,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:38:23,429 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting sll_circular_appendErr9REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:38:23,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:38:23,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1234890365, now seen corresponding path program 1 times [2021-11-13 17:38:23,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:38:23,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979446332] [2021-11-13 17:38:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:38:23,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:38:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:23,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:38:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:23,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:38:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:24,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:38:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:24,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:38:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:24,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 17:38:24,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 17:38:25,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:38:25,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979446332] [2021-11-13 17:38:25,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979446332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:38:25,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086133060] [2021-11-13 17:38:25,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:38:25,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:38:25,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:38:25,077 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:38:25,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-13 17:38:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:25,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-13 17:38:25,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:38:25,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 17:38:25,279 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 17:38:25,799 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-13 17:38:25,800 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 17:38:25,819 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 17:38:25,820 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 17:38:25,961 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 17:38:25,967 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 17:38:26,198 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-13 17:38:26,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 50 [2021-11-13 17:38:26,210 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 17:38:26,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 59 [2021-11-13 17:38:27,107 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-13 17:38:27,108 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 116 treesize of output 62 [2021-11-13 17:38:27,117 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 17:38:27,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 41 [2021-11-13 17:38:39,488 INFO L354 Elim1Store]: treesize reduction 356, result has 10.3 percent of original size [2021-11-13 17:38:39,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 173 treesize of output 167 [2021-11-13 17:38:39,552 INFO L354 Elim1Store]: treesize reduction 248, result has 10.5 percent of original size [2021-11-13 17:38:39,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 158 treesize of output 106 [2021-11-13 17:38:39,573 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-13 17:38:39,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 148 [2021-11-13 17:38:39,597 INFO L354 Elim1Store]: treesize reduction 84, result has 21.5 percent of original size [2021-11-13 17:38:39,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 139 treesize of output 144 [2021-11-13 17:38:41,236 INFO L354 Elim1Store]: treesize reduction 117, result has 6.4 percent of original size [2021-11-13 17:38:41,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 168 treesize of output 97 [2021-11-13 17:38:41,262 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-11-13 17:38:41,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 58 [2021-11-13 17:38:41,472 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:38:41,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:38:42,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086133060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:38:42,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:38:42,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 58 [2021-11-13 17:38:42,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982526743] [2021-11-13 17:38:42,464 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:38:42,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-13 17:38:42,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:38:42,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-13 17:38:42,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=4077, Unknown=5, NotChecked=0, Total=4290 [2021-11-13 17:38:42,466 INFO L87 Difference]: Start difference. First operand 152 states and 170 transitions. Second operand has 59 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 47 states have internal predecessors, (87), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-13 17:38:53,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:38:53,120 INFO L93 Difference]: Finished difference Result 172 states and 190 transitions. [2021-11-13 17:38:53,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 17:38:53,128 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 47 states have internal predecessors, (87), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 56 [2021-11-13 17:38:53,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:38:53,129 INFO L225 Difference]: With dead ends: 172 [2021-11-13 17:38:53,129 INFO L226 Difference]: Without dead ends: 172 [2021-11-13 17:38:53,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=328, Invalid=5827, Unknown=7, NotChecked=0, Total=6162 [2021-11-13 17:38:53,132 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 193 mSDsluCounter, 1267 mSDsCounter, 0 mSdLazyCounter, 2175 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1300.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1348 SdHoareTripleChecker+Invalid, 2542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.81ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 1518.49ms IncrementalHoareTripleChecker+Time [2021-11-13 17:38:53,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 1348 Invalid, 2542 Unknown, 0 Unchecked, 12.81ms Time], IncrementalHoareTripleChecker [69 Valid, 2175 Invalid, 0 Unknown, 298 Unchecked, 1518.49ms Time] [2021-11-13 17:38:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-13 17:38:53,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 152. [2021-11-13 17:38:53,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 111 states have (on average 1.2882882882882882) internal successors, (143), 132 states have internal predecessors, (143), 12 states have call successors, (12), 8 states have call predecessors, (12), 10 states have return successors, (14), 11 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-13 17:38:53,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 169 transitions. [2021-11-13 17:38:53,138 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 169 transitions. Word has length 56 [2021-11-13 17:38:53,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:38:53,138 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 169 transitions. [2021-11-13 17:38:53,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 47 states have internal predecessors, (87), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-13 17:38:53,139 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 169 transitions. [2021-11-13 17:38:53,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 17:38:53,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:38:53,140 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:38:53,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-13 17:38:53,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-13 17:38:53,353 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr10ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:38:53,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:38:53,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1668743529, now seen corresponding path program 1 times [2021-11-13 17:38:53,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:38:53,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153294924] [2021-11-13 17:38:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:38:53,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:38:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:53,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:38:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:53,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:38:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:53,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:38:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:53,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:38:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:53,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-13 17:38:53,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:53,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:38:53,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:53,910 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 17:38:53,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:38:53,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153294924] [2021-11-13 17:38:53,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153294924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:38:53,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158931041] [2021-11-13 17:38:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:38:53,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:38:53,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:38:53,912 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:38:53,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-13 17:38:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:38:54,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-13 17:38:54,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:38:54,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-11-13 17:38:56,401 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.offset Int) (node_create_~temp~0.base Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (let ((.cse0 (+ node_create_~temp~0.offset 4))) (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) node_create_~temp~0.offset 0) .cse0 (select (select |c_#memory_$Pointer$.base| node_create_~temp~0.base) .cse0))))))) is different from true [2021-11-13 17:39:07,836 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_7 Int) (node_create_~temp~0.offset Int) (node_create_~temp~0.base Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (= (select (select (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) node_create_~temp~0.offset 0) (+ node_create_~temp~0.offset 4) v_DerPreprocessor_7)) |c_sll_circular_append_#in~head.base|) |c_sll_circular_append_#in~head.offset|) |c_sll_circular_append_#t~mem12.base|))) is different from true [2021-11-13 17:39:09,851 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_DerPreprocessor_7 Int) (node_create_~temp~0.offset Int) (node_create_~temp~0.base Int)) (and (= (select (select (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) node_create_~temp~0.offset 0) (+ node_create_~temp~0.offset 4) v_DerPreprocessor_7)) |c_sll_circular_append_#in~head.base|) |c_sll_circular_append_#in~head.offset|) 0) (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|))) is different from true [2021-11-13 17:39:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2021-11-13 17:39:09,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:39:11,991 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_node_create_~temp~0.offset_39 Int) (v_DerPreprocessor_8 Int) (v_node_create_~temp~0.base_50 Int)) (or (not (= (select (select (store |c_#memory_$Pointer$.base| v_node_create_~temp~0.base_50 (store (store (select |c_#memory_$Pointer$.base| v_node_create_~temp~0.base_50) v_node_create_~temp~0.offset_39 0) (+ v_node_create_~temp~0.offset_39 4) v_DerPreprocessor_8)) |c_main_~#s~0.base|) |c_main_~#s~0.offset|) 0)) (<= |c_#StackHeapBarrier| v_node_create_~temp~0.base_50))) is different from false [2021-11-13 17:39:11,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158931041] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:39:11,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:39:11,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 32 [2021-11-13 17:39:11,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031846386] [2021-11-13 17:39:11,992 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:39:11,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-13 17:39:11,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:39:11,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-13 17:39:11,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=726, Unknown=9, NotChecked=228, Total=1056 [2021-11-13 17:39:11,994 INFO L87 Difference]: Start difference. First operand 152 states and 169 transitions. Second operand has 32 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 7 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-13 17:39:42,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:39:42,457 INFO L93 Difference]: Finished difference Result 166 states and 181 transitions. [2021-11-13 17:39:42,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-13 17:39:42,458 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 7 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 57 [2021-11-13 17:39:42,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:39:42,459 INFO L225 Difference]: With dead ends: 166 [2021-11-13 17:39:42,460 INFO L226 Difference]: Without dead ends: 158 [2021-11-13 17:39:42,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 47.9s TimeCoverageRelationStatistics Valid=171, Invalid=1552, Unknown=15, NotChecked=332, Total=2070 [2021-11-13 17:39:42,461 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 144 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 429.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.85ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 500.80ms IncrementalHoareTripleChecker+Time [2021-11-13 17:39:42,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 623 Invalid, 1215 Unknown, 0 Unchecked, 5.85ms Time], IncrementalHoareTripleChecker [35 Valid, 803 Invalid, 0 Unknown, 377 Unchecked, 500.80ms Time] [2021-11-13 17:39:42,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-13 17:39:42,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2021-11-13 17:39:42,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 100 states have (on average 1.29) internal successors, (129), 120 states have internal predecessors, (129), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-11-13 17:39:42,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 153 transitions. [2021-11-13 17:39:42,467 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 153 transitions. Word has length 57 [2021-11-13 17:39:42,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:39:42,468 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 153 transitions. [2021-11-13 17:39:42,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 26 states have internal predecessors, (62), 7 states have call successors, (13), 4 states have call predecessors, (13), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-13 17:39:42,468 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 153 transitions. [2021-11-13 17:39:42,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-13 17:39:42,469 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:39:42,469 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:39:42,500 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-13 17:39:42,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-13 17:39:42,697 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting sll_circular_appendErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:39:42,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:39:42,698 INFO L85 PathProgramCache]: Analyzing trace with hash -281404139, now seen corresponding path program 2 times [2021-11-13 17:39:42,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:39:42,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035694827] [2021-11-13 17:39:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:39:42,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:39:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:39:42,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:39:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:39:42,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:39:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:39:42,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:39:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:39:42,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:39:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:39:42,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-11-13 17:39:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:39:42,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-13 17:39:42,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:39:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 17:39:42,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:39:42,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035694827] [2021-11-13 17:39:42,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035694827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:39:42,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937897010] [2021-11-13 17:39:42,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:39:42,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:39:42,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:39:42,838 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:39:42,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-13 17:39:42,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:39:42,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:39:42,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 17:39:42,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:39:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 17:39:43,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:39:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-13 17:39:43,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937897010] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 17:39:43,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:39:43,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 12 [2021-11-13 17:39:43,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955094461] [2021-11-13 17:39:43,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:39:43,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:39:43,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:39:43,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:39:43,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:39:43,386 INFO L87 Difference]: Start difference. First operand 139 states and 153 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-13 17:39:43,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:39:43,419 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2021-11-13 17:39:43,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:39:43,419 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 59 [2021-11-13 17:39:43,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:39:43,420 INFO L225 Difference]: With dead ends: 116 [2021-11-13 17:39:43,420 INFO L226 Difference]: Without dead ends: 99 [2021-11-13 17:39:43,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 122 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 17:39:43,421 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 31 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.96ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.77ms IncrementalHoareTripleChecker+Time [2021-11-13 17:39:43,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 362 Invalid, 31 Unknown, 0 Unchecked, 0.96ms Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 28.77ms Time] [2021-11-13 17:39:43,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-13 17:39:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-13 17:39:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 69 states have (on average 1.318840579710145) internal successors, (91), 85 states have internal predecessors, (91), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 17:39:43,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2021-11-13 17:39:43,426 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 59 [2021-11-13 17:39:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:39:43,426 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2021-11-13 17:39:43,426 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, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-13 17:39:43,426 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2021-11-13 17:39:43,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 17:39:43,427 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:39:43,427 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:39:43,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-13 17:39:43,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-13 17:39:43,637 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting sll_circular_appendErr8REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:39:43,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:39:43,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1653511885, now seen corresponding path program 2 times [2021-11-13 17:39:43,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:39:43,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064478304] [2021-11-13 17:39:43,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:39:43,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:39:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:39:44,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:39:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:39:44,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:39:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:39:44,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:39:44,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:39:44,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:39:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:39:44,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 17:39:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:39:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 17:39:45,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:39:45,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064478304] [2021-11-13 17:39:45,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064478304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:39:45,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019580524] [2021-11-13 17:39:45,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:39:45,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:39:45,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:39:45,337 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:39:45,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-13 17:39:45,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:39:45,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:39:45,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-13 17:39:45,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:39:45,557 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 17:39:45,979 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-13 17:39:45,979 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 17:39:46,168 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 17:39:46,179 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 17:39:46,352 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-13 17:39:46,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 46 [2021-11-13 17:39:46,364 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-13 17:39:46,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 50 [2021-11-13 17:39:46,969 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-11-13 17:39:46,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 56 [2021-11-13 17:39:46,977 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-13 17:39:46,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 31 [2021-11-13 17:39:49,352 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.base Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base (store (store (select |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base) 0 0) 4 (select (select |c_#memory_$Pointer$.offset| node_create_~temp~0.base) 4)))) (= (select |c_old(#valid)| node_create_~temp~0.base) 0) (< node_create_~temp~0.base |c_#StackHeapBarrier|) (= (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) 0 0) 4 (select (select |c_#memory_$Pointer$.base| node_create_~temp~0.base) 4))) |c_#memory_$Pointer$.base|))) is different from true [2021-11-13 17:39:49,496 INFO L354 Elim1Store]: treesize reduction 122, result has 15.3 percent of original size [2021-11-13 17:39:49,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 105 [2021-11-13 17:39:49,526 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-13 17:39:49,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 133 [2021-11-13 17:39:49,596 INFO L354 Elim1Store]: treesize reduction 214, result has 13.7 percent of original size [2021-11-13 17:39:49,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 117 [2021-11-13 17:39:50,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:39:50,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:39:50,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:39:50,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 17:39:50,894 INFO L354 Elim1Store]: treesize reduction 82, result has 3.5 percent of original size [2021-11-13 17:39:50,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 127 treesize of output 84 [2021-11-13 17:39:51,822 INFO L354 Elim1Store]: treesize reduction 57, result has 6.6 percent of original size [2021-11-13 17:39:51,823 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 92 treesize of output 42 [2021-11-13 17:39:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-13 17:39:51,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:39:52,034 INFO L354 Elim1Store]: treesize reduction 5, result has 75.0 percent of original size [2021-11-13 17:39:52,034 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 24 treesize of output 23 [2021-11-13 17:39:52,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019580524] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:39:52,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:39:52,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 32] total 64 [2021-11-13 17:39:52,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208916337] [2021-11-13 17:39:52,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:39:52,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-13 17:39:52,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:39:52,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-13 17:39:52,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=4469, Unknown=1, NotChecked=134, Total=4830 [2021-11-13 17:39:52,981 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand has 65 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 53 states have internal predecessors, (95), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-13 17:40:09,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:40:09,613 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2021-11-13 17:40:09,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-13 17:40:09,614 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 53 states have internal predecessors, (95), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2021-11-13 17:40:09,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:40:09,614 INFO L225 Difference]: With dead ends: 126 [2021-11-13 17:40:09,614 INFO L226 Difference]: Without dead ends: 126 [2021-11-13 17:40:09,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=417, Invalid=7595, Unknown=2, NotChecked=176, Total=8190 [2021-11-13 17:40:09,617 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 189 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 2541 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4063.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 2833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.35ms SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 4404.53ms IncrementalHoareTripleChecker+Time [2021-11-13 17:40:09,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 1088 Invalid, 2833 Unknown, 0 Unchecked, 21.35ms Time], IncrementalHoareTripleChecker [57 Valid, 2541 Invalid, 0 Unknown, 235 Unchecked, 4404.53ms Time] [2021-11-13 17:40:09,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-13 17:40:09,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 104. [2021-11-13 17:40:09,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 90 states have internal predecessors, (98), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 17:40:09,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 113 transitions. [2021-11-13 17:40:09,621 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 113 transitions. Word has length 61 [2021-11-13 17:40:09,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:40:09,622 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 113 transitions. [2021-11-13 17:40:09,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 58 states have (on average 1.6379310344827587) internal successors, (95), 53 states have internal predecessors, (95), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-13 17:40:09,622 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 113 transitions. [2021-11-13 17:40:09,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 17:40:09,623 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:40:09,623 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:40:09,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-13 17:40:09,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-13 17:40:09,837 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting sll_circular_appendErr9REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:40:09,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:40:09,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1653511886, now seen corresponding path program 2 times [2021-11-13 17:40:09,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:40:09,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956097964] [2021-11-13 17:40:09,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:40:09,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:40:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:10,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:40:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:10,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:40:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:11,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:40:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:11,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:40:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:11,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-11-13 17:40:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 17:40:12,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:40:12,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956097964] [2021-11-13 17:40:12,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956097964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:40:12,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12406253] [2021-11-13 17:40:12,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:40:12,657 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:40:12,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:40:12,658 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:40:12,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-13 17:40:12,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:40:12,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:40:12,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-13 17:40:12,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:40:12,940 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 17:40:13,836 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 17:40:13,836 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 17:40:14,136 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 17:40:14,149 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 17:40:14,529 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-13 17:40:14,530 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 17:40:14,552 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-13 17:40:14,552 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 17:40:15,831 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-13 17:40:15,831 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 94 treesize of output 52 [2021-11-13 17:40:15,839 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 17:40:15,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 31 [2021-11-13 17:40:18,457 WARN L860 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.base Int)) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base (store (store (select |c_old(#memory_$Pointer$.offset)| node_create_~temp~0.base) 0 0) 4 (select (select |c_#memory_$Pointer$.offset| node_create_~temp~0.base) 4)))) (= (select |c_old(#valid)| node_create_~temp~0.base) 0) (< node_create_~temp~0.base |c_#StackHeapBarrier|) (= (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base (store (store (select |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base) 0 0) 4 (select (select |c_#memory_$Pointer$.base| node_create_~temp~0.base) 4))) |c_#memory_$Pointer$.base|))) is different from true [2021-11-13 17:40:18,578 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-11-13 17:40:18,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 101 [2021-11-13 17:40:18,645 INFO L354 Elim1Store]: treesize reduction 132, result has 20.5 percent of original size [2021-11-13 17:40:18,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 126 treesize of output 124 [2021-11-13 17:40:18,701 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-13 17:40:18,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 117 [2021-11-13 17:40:20,917 INFO L354 Elim1Store]: treesize reduction 162, result has 6.4 percent of original size [2021-11-13 17:40:20,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 184 treesize of output 110 [2021-11-13 17:40:20,977 INFO L354 Elim1Store]: treesize reduction 142, result has 4.7 percent of original size [2021-11-13 17:40:20,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 75 treesize of output 55 [2021-11-13 17:40:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2021-11-13 17:40:21,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:40:30,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12406253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:40:30,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 17:40:30,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2021-11-13 17:40:30,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494497206] [2021-11-13 17:40:30,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 17:40:30,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-13 17:40:30,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:40:30,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-13 17:40:30,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3473, Unknown=4, NotChecked=118, Total=3782 [2021-11-13 17:40:30,311 INFO L87 Difference]: Start difference. First operand 104 states and 113 transitions. Second operand has 61 states, 55 states have (on average 1.709090909090909) internal successors, (94), 49 states have internal predecessors, (94), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-13 17:40:44,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:40:44,433 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2021-11-13 17:40:44,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-13 17:40:44,434 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 55 states have (on average 1.709090909090909) internal successors, (94), 49 states have internal predecessors, (94), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 61 [2021-11-13 17:40:44,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:40:44,435 INFO L225 Difference]: With dead ends: 114 [2021-11-13 17:40:44,435 INFO L226 Difference]: Without dead ends: 114 [2021-11-13 17:40:44,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=304, Invalid=5245, Unknown=5, NotChecked=146, Total=5700 [2021-11-13 17:40:44,438 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 137 mSDsluCounter, 975 mSDsCounter, 0 mSdLazyCounter, 2066 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3558.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 2213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.33ms SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 3847.96ms IncrementalHoareTripleChecker+Time [2021-11-13 17:40:44,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 1032 Invalid, 2213 Unknown, 0 Unchecked, 15.33ms Time], IncrementalHoareTripleChecker [44 Valid, 2066 Invalid, 0 Unknown, 103 Unchecked, 3847.96ms Time] [2021-11-13 17:40:44,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-13 17:40:44,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2021-11-13 17:40:44,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.2878787878787878) internal successors, (85), 80 states have internal predecessors, (85), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-13 17:40:44,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2021-11-13 17:40:44,442 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 61 [2021-11-13 17:40:44,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:40:44,442 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2021-11-13 17:40:44,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 55 states have (on average 1.709090909090909) internal successors, (94), 49 states have internal predecessors, (94), 9 states have call successors, (13), 7 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-13 17:40:44,443 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2021-11-13 17:40:44,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 17:40:44,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:40:44,444 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:40:44,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-13 17:40:44,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-13 17:40:44,653 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 46 more)] === [2021-11-13 17:40:44,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:40:44,654 INFO L85 PathProgramCache]: Analyzing trace with hash 194108871, now seen corresponding path program 1 times [2021-11-13 17:40:44,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:40:44,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630680822] [2021-11-13 17:40:44,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:40:44,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:40:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:44,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-13 17:40:44,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:44,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 17:40:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:45,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:40:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:45,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-11-13 17:40:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:45,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-13 17:40:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:46,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:40:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:47,118 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 17:40:47,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:40:47,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630680822] [2021-11-13 17:40:47,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630680822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:40:47,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583573618] [2021-11-13 17:40:47,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:40:47,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:40:47,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:40:47,120 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:40:47,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d08346c-d2dd-4e37-91f7-0360f97f5cf8/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-13 17:40:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:40:47,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-13 17:40:47,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:40:48,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-11-13 17:40:48,457 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 17:41:20,156 INFO L354 Elim1Store]: treesize reduction 834, result has 20.6 percent of original size [2021-11-13 17:41:20,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 840 treesize of output 432 [2021-11-13 17:41:20,265 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-13 17:41:20,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 447 treesize of output 455 [2021-11-13 17:43:03,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:43:03,864 INFO L354 Elim1Store]: treesize reduction 24, result has 88.1 percent of original size [2021-11-13 17:43:03,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 17 case distinctions, treesize of input 444 treesize of output 531