./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX --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 e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 08:40:50,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:40:50,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:40:50,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:40:50,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:40:50,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:40:50,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:40:50,247 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:40:50,249 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:40:50,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:40:50,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:40:50,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:40:50,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:40:50,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:40:50,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:40:50,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:40:50,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:40:50,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:40:50,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:40:50,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:40:50,275 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:40:50,277 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:40:50,279 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:40:50,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:40:50,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:40:50,287 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:40:50,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:40:50,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:40:50,290 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:40:50,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:40:50,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:40:50,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:40:50,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:40:50,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:40:50,298 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:40:50,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:40:50,299 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:40:50,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:40:50,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:40:50,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:40:50,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:40:50,304 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 08:40:50,334 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:40:50,335 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:40:50,335 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:40:50,336 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:40:50,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:40:50,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:40:50,338 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:40:50,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:40:50,338 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 08:40:50,339 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 08:40:50,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:40:50,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 08:40:50,340 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:40:50,340 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 08:40:50,340 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 08:40:50,341 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 08:40:50,341 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 08:40:50,341 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 08:40:50,341 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 08:40:50,342 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:40:50,342 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:40:50,342 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:40:50,343 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 08:40:50,343 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:40:50,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:40:50,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 08:40:50,344 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:40:50,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 08:40:50,345 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:40:50,345 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_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4cb0386e6b22b9d67dd4f4c4c33eb167dcf1836f99794e4424c5e73e6fc14d4 [2021-11-09 08:40:50,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:40:50,627 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:40:50,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:40:50,633 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:40:50,634 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:40:50,635 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2021-11-09 08:40:50,732 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/data/ee8592a8c/c2f1ccfa534441dd858a262042a14dcb/FLAGac6e9d991 [2021-11-09 08:40:51,292 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:40:51,293 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i [2021-11-09 08:40:51,314 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/data/ee8592a8c/c2f1ccfa534441dd858a262042a14dcb/FLAGac6e9d991 [2021-11-09 08:40:51,615 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/data/ee8592a8c/c2f1ccfa534441dd858a262042a14dcb [2021-11-09 08:40:51,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:40:51,619 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 08:40:51,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:40:51,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:40:51,631 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:40:51,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:40:51" (1/1) ... [2021-11-09 08:40:51,633 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b15e9cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:40:51, skipping insertion in model container [2021-11-09 08:40:51,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:40:51" (1/1) ... [2021-11-09 08:40:51,644 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:40:51,726 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:40:52,095 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_32b71704-1b2f-4a75-a10c-af97004013df/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i[24076,24089] [2021-11-09 08:40:52,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:40:52,108 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:40:52,157 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_32b71704-1b2f-4a75-a10c-af97004013df/sv-benchmarks/c/list-simple/sll2n_prepend_equal.i[24076,24089] [2021-11-09 08:40:52,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:40:52,200 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:40:52,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:40:52 WrapperNode [2021-11-09 08:40:52,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:40:52,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:40:52,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:40:52,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:40:52,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:40:52" (1/1) ... [2021-11-09 08:40:52,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:40:52" (1/1) ... [2021-11-09 08:40:52,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:40:52" (1/1) ... [2021-11-09 08:40:52,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:40:52" (1/1) ... [2021-11-09 08:40:52,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:40:52" (1/1) ... [2021-11-09 08:40:52,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:40:52" (1/1) ... [2021-11-09 08:40:52,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:40:52" (1/1) ... [2021-11-09 08:40:52,297 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:40:52,299 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:40:52,299 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:40:52,299 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:40:52,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:40:52" (1/1) ... [2021-11-09 08:40:52,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 08:40:52,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:52,338 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 08:40:52,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 08:40:52,385 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 08:40:52,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:40:52,386 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 08:40:52,386 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 08:40:52,386 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 08:40:52,387 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-09 08:40:52,387 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-11-09 08:40:52,387 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-11-09 08:40:52,387 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2021-11-09 08:40:52,388 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_prepend [2021-11-09 08:40:52,388 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 08:40:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 08:40:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 08:40:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 08:40:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 08:40:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 08:40:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 08:40:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 08:40:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 08:40:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 08:40:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 08:40:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 08:40:52,391 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 08:40:52,391 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 08:40:52,391 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 08:40:52,391 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 08:40:52,392 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 08:40:52,392 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 08:40:52,392 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 08:40:52,392 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 08:40:52,393 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 08:40:52,393 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 08:40:52,393 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 08:40:52,393 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 08:40:52,393 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 08:40:52,394 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 08:40:52,394 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 08:40:52,394 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 08:40:52,394 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 08:40:52,395 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 08:40:52,395 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 08:40:52,395 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 08:40:52,395 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 08:40:52,395 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 08:40:52,396 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 08:40:52,396 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 08:40:52,396 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 08:40:52,396 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 08:40:52,397 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 08:40:52,397 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 08:40:52,397 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 08:40:52,397 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 08:40:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 08:40:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 08:40:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 08:40:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 08:40:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 08:40:52,399 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 08:40:52,399 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 08:40:52,399 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 08:40:52,399 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 08:40:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 08:40:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 08:40:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 08:40:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 08:40:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 08:40:52,401 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 08:40:52,401 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 08:40:52,401 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 08:40:52,401 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 08:40:52,402 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 08:40:52,402 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 08:40:52,402 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 08:40:52,402 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-09 08:40:52,403 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 08:40:52,403 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 08:40:52,403 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 08:40:52,403 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 08:40:52,403 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 08:40:52,404 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 08:40:52,404 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 08:40:52,404 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 08:40:52,405 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 08:40:52,405 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 08:40:52,406 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 08:40:52,406 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 08:40:52,406 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 08:40:52,406 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 08:40:52,406 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 08:40:52,407 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 08:40:52,407 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 08:40:52,407 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 08:40:52,407 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 08:40:52,407 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 08:40:52,408 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 08:40:52,408 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 08:40:52,408 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 08:40:52,408 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 08:40:52,408 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 08:40:52,409 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 08:40:52,409 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 08:40:52,409 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 08:40:52,409 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 08:40:52,409 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 08:40:52,410 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 08:40:52,410 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 08:40:52,410 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 08:40:52,411 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 08:40:52,411 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 08:40:52,412 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 08:40:52,412 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 08:40:52,412 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 08:40:52,412 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 08:40:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 08:40:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 08:40:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 08:40:52,413 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 08:40:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 08:40:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 08:40:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 08:40:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 08:40:52,414 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-09 08:40:52,415 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-11-09 08:40:52,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 08:40:52,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 08:40:52,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 08:40:52,417 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-11-09 08:40:52,418 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2021-11-09 08:40:52,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 08:40:52,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 08:40:52,422 INFO L130 BoogieDeclarations]: Found specification of procedure sll_prepend [2021-11-09 08:40:52,425 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 08:40:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-09 08:40:52,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 08:40:52,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 08:40:52,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 08:40:52,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:40:52,822 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-09 08:40:53,071 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:40:53,072 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-09 08:40:53,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:40:53 BoogieIcfgContainer [2021-11-09 08:40:53,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:40:53,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 08:40:53,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 08:40:53,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 08:40:53,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 08:40:51" (1/3) ... [2021-11-09 08:40:53,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4367e6d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:40:53, skipping insertion in model container [2021-11-09 08:40:53,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:40:52" (2/3) ... [2021-11-09 08:40:53,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4367e6d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 08:40:53, skipping insertion in model container [2021-11-09 08:40:53,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:40:53" (3/3) ... [2021-11-09 08:40:53,088 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_equal.i [2021-11-09 08:40:53,100 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 08:40:53,100 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2021-11-09 08:40:53,182 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 08:40:53,200 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 [2021-11-09 08:40:53,201 INFO L340 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2021-11-09 08:40:53,223 INFO L276 IsEmpty]: Start isEmpty. Operand has 90 states, 48 states have (on average 1.75) internal successors, (84), 75 states have internal predecessors, (84), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-09 08:40:53,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 08:40:53,250 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:53,251 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:53,252 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:40:53,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:53,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1910806041, now seen corresponding path program 1 times [2021-11-09 08:40:53,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:53,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601593463] [2021-11-09 08:40:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:53,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:53,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:53,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:40:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:40:53,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:53,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601593463] [2021-11-09 08:40:53,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601593463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:40:53,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:40:53,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:40:53,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411885260] [2021-11-09 08:40:53,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:40:53,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:53,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:40:53,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:40:53,589 INFO L87 Difference]: Start difference. First operand has 90 states, 48 states have (on average 1.75) internal successors, (84), 75 states have internal predecessors, (84), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:40:53,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:53,885 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2021-11-09 08:40:53,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:40:53,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-09 08:40:53,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:53,900 INFO L225 Difference]: With dead ends: 106 [2021-11-09 08:40:53,900 INFO L226 Difference]: Without dead ends: 100 [2021-11-09 08:40:53,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:40:53,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-09 08:40:53,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2021-11-09 08:40:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 45 states have (on average 1.6222222222222222) internal successors, (73), 69 states have internal predecessors, (73), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-09 08:40:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2021-11-09 08:40:53,953 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 13 [2021-11-09 08:40:53,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:53,953 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2021-11-09 08:40:53,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:40:53,954 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2021-11-09 08:40:53,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 08:40:53,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:53,955 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:53,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 08:40:53,956 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:40:53,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:53,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1910806042, now seen corresponding path program 1 times [2021-11-09 08:40:53,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:53,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694381075] [2021-11-09 08:40:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:53,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:53,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:54,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:40:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:40:54,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:54,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694381075] [2021-11-09 08:40:54,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694381075] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:40:54,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:40:54,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 08:40:54,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047053785] [2021-11-09 08:40:54,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 08:40:54,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:54,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:40:54,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:40:54,143 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:40:54,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:54,387 INFO L93 Difference]: Finished difference Result 98 states and 105 transitions. [2021-11-09 08:40:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:40:54,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-09 08:40:54,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:54,394 INFO L225 Difference]: With dead ends: 98 [2021-11-09 08:40:54,394 INFO L226 Difference]: Without dead ends: 98 [2021-11-09 08:40:54,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:40:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-09 08:40:54,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-11-09 08:40:54,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 67 states have internal predecessors, (71), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-09 08:40:54,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-11-09 08:40:54,424 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 13 [2021-11-09 08:40:54,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:54,425 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-11-09 08:40:54,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 08:40:54,425 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-11-09 08:40:54,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 08:40:54,427 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:54,427 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:54,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 08:40:54,428 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:40:54,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:54,430 INFO L85 PathProgramCache]: Analyzing trace with hash -795820574, now seen corresponding path program 1 times [2021-11-09 08:40:54,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:54,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442042473] [2021-11-09 08:40:54,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:54,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:54,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:40:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:54,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-09 08:40:54,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:54,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:40:54,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:54,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442042473] [2021-11-09 08:40:54,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442042473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:40:54,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:40:54,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:40:54,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177860150] [2021-11-09 08:40:54,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:40:54,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:54,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:40:54,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:40:54,717 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 08:40:55,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:55,115 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2021-11-09 08:40:55,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:40:55,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-09 08:40:55,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:55,117 INFO L225 Difference]: With dead ends: 97 [2021-11-09 08:40:55,117 INFO L226 Difference]: Without dead ends: 97 [2021-11-09 08:40:55,117 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:40:55,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-09 08:40:55,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2021-11-09 08:40:55,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 66 states have internal predecessors, (70), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-09 08:40:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-11-09 08:40:55,132 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 19 [2021-11-09 08:40:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:55,133 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-11-09 08:40:55,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 08:40:55,134 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-11-09 08:40:55,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 08:40:55,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:55,135 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:55,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 08:40:55,135 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:40:55,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:55,136 INFO L85 PathProgramCache]: Analyzing trace with hash -795820573, now seen corresponding path program 1 times [2021-11-09 08:40:55,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:55,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693877840] [2021-11-09 08:40:55,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:55,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:55,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:40:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:55,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-11-09 08:40:55,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:40:55,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:55,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693877840] [2021-11-09 08:40:55,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693877840] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:40:55,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:40:55,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:40:55,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477644929] [2021-11-09 08:40:55,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:40:55,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:55,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:40:55,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:40:55,378 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 08:40:55,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:55,732 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2021-11-09 08:40:55,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:40:55,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-11-09 08:40:55,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:55,739 INFO L225 Difference]: With dead ends: 96 [2021-11-09 08:40:55,739 INFO L226 Difference]: Without dead ends: 96 [2021-11-09 08:40:55,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:40:55,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-09 08:40:55,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2021-11-09 08:40:55,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 65 states have internal predecessors, (69), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-09 08:40:55,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-11-09 08:40:55,767 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 19 [2021-11-09 08:40:55,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:55,768 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-11-09 08:40:55,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 08:40:55,769 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-11-09 08:40:55,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 08:40:55,770 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:55,771 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:55,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 08:40:55,771 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_prependErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:40:55,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:55,772 INFO L85 PathProgramCache]: Analyzing trace with hash 809259300, now seen corresponding path program 1 times [2021-11-09 08:40:55,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:55,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388922612] [2021-11-09 08:40:55,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:55,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:55,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:40:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:55,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:40:55,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:55,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:40:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:40:55,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:55,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388922612] [2021-11-09 08:40:55,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388922612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:40:55,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:40:55,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:40:55,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546733296] [2021-11-09 08:40:55,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 08:40:55,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:55,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 08:40:55,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 08:40:55,927 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 08:40:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:56,255 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-11-09 08:40:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:40:56,256 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 25 [2021-11-09 08:40:56,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:56,258 INFO L225 Difference]: With dead ends: 100 [2021-11-09 08:40:56,258 INFO L226 Difference]: Without dead ends: 97 [2021-11-09 08:40:56,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:40:56,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-09 08:40:56,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2021-11-09 08:40:56,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 66 states have internal predecessors, (70), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-09 08:40:56,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-11-09 08:40:56,271 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 25 [2021-11-09 08:40:56,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:56,271 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-11-09 08:40:56,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 08:40:56,272 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-11-09 08:40:56,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 08:40:56,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:56,273 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:56,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 08:40:56,274 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sll_prependErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:40:56,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:56,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1979930234, now seen corresponding path program 1 times [2021-11-09 08:40:56,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:56,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913334896] [2021-11-09 08:40:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:56,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:56,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:40:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:56,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:40:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:56,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:40:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:56,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 08:40:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 08:40:56,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:56,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913334896] [2021-11-09 08:40:56,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913334896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:56,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068834723] [2021-11-09 08:40:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:56,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:56,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:56,469 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:56,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 08:40:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:56,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 08:40:56,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:40:56,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068834723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:56,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:56,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-11-09 08:40:56,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135153870] [2021-11-09 08:40:56,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 08:40:56,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:56,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 08:40:56,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:40:56,901 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 10 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-09 08:40:57,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:40:57,271 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2021-11-09 08:40:57,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 08:40:57,272 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) Word has length 38 [2021-11-09 08:40:57,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:40:57,273 INFO L225 Difference]: With dead ends: 106 [2021-11-09 08:40:57,274 INFO L226 Difference]: Without dead ends: 103 [2021-11-09 08:40:57,274 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:40:57,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-09 08:40:57,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 85. [2021-11-09 08:40:57,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 51 states have (on average 1.4705882352941178) internal successors, (75), 71 states have internal predecessors, (75), 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) [2021-11-09 08:40:57,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2021-11-09 08:40:57,282 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 38 [2021-11-09 08:40:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:40:57,282 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2021-11-09 08:40:57,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 6 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-09 08:40:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2021-11-09 08:40:57,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 08:40:57,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:40:57,285 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:40:57,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:40:57,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:57,505 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting sll_prependErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:40:57,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:40:57,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1133346716, now seen corresponding path program 2 times [2021-11-09 08:40:57,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:40:57,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856720808] [2021-11-09 08:40:57,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:40:57,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:40:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:57,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:40:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:57,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:40:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:58,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:40:58,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:58,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:40:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:58,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-09 08:40:58,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:40:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:40:58,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:40:58,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856720808] [2021-11-09 08:40:58,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856720808] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:58,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286124413] [2021-11-09 08:40:58,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:40:58,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:40:58,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:40:58,433 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:40:58,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 08:40:58,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:40:58,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:40:58,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 08:40:58,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:40:58,712 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 [2021-11-09 08:40:58,752 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 [2021-11-09 08:40:59,326 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-09 08:40:59,327 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 18 treesize of output 22 [2021-11-09 08:40:59,597 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:40:59,598 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 19 treesize of output 15 [2021-11-09 08:40:59,735 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-09 08:40:59,735 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 27 treesize of output 32 [2021-11-09 08:40:59,819 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:40:59,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286124413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:40:59,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:40:59,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-11-09 08:40:59,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13214026] [2021-11-09 08:40:59,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 08:40:59,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:40:59,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 08:40:59,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-11-09 08:40:59,823 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand has 22 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 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) [2021-11-09 08:41:01,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:01,269 INFO L93 Difference]: Finished difference Result 157 states and 171 transitions. [2021-11-09 08:41:01,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:41:01,270 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 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 51 [2021-11-09 08:41:01,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:01,272 INFO L225 Difference]: With dead ends: 157 [2021-11-09 08:41:01,272 INFO L226 Difference]: Without dead ends: 157 [2021-11-09 08:41:01,273 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-11-09 08:41:01,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-09 08:41:01,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 104. [2021-11-09 08:41:01,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 67 states have (on average 1.4179104477611941) internal successors, (95), 85 states have internal predecessors, (95), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-09 08:41:01,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2021-11-09 08:41:01,282 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 51 [2021-11-09 08:41:01,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:01,283 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2021-11-09 08:41:01,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 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) [2021-11-09 08:41:01,283 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2021-11-09 08:41:01,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 08:41:01,285 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:01,286 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:01,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:01,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:01,517 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting sll_prependErr1REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:41:01,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:01,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1133346715, now seen corresponding path program 1 times [2021-11-09 08:41:01,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:01,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306002037] [2021-11-09 08:41:01,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:01,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:01,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:01,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:41:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:01,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:41:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:01,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:41:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:02,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-09 08:41:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 08:41:02,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:02,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306002037] [2021-11-09 08:41:02,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306002037] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:02,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431260398] [2021-11-09 08:41:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:02,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:02,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:02,123 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:02,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 08:41:02,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:02,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 08:41:02,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:02,368 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 [2021-11-09 08:41:02,401 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 [2021-11-09 08:41:02,985 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-11-09 08:41:02,986 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 21 treesize of output 25 [2021-11-09 08:41:03,221 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:41:03,222 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 19 treesize of output 15 [2021-11-09 08:41:03,326 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-09 08:41:03,327 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 27 treesize of output 32 [2021-11-09 08:41:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-09 08:41:03,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431260398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:03,409 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:03,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2021-11-09 08:41:03,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450708525] [2021-11-09 08:41:03,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 08:41:03,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:03,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 08:41:03,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-09 08:41:03,411 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 21 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-09 08:41:04,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:04,582 INFO L93 Difference]: Finished difference Result 165 states and 179 transitions. [2021-11-09 08:41:04,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:41:04,597 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 51 [2021-11-09 08:41:04,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:04,600 INFO L225 Difference]: With dead ends: 165 [2021-11-09 08:41:04,600 INFO L226 Difference]: Without dead ends: 165 [2021-11-09 08:41:04,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=156, Invalid=600, Unknown=0, NotChecked=0, Total=756 [2021-11-09 08:41:04,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-09 08:41:04,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 112. [2021-11-09 08:41:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 93 states have internal predecessors, (107), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-09 08:41:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 129 transitions. [2021-11-09 08:41:04,611 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 129 transitions. Word has length 51 [2021-11-09 08:41:04,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:04,612 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 129 transitions. [2021-11-09 08:41:04,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 9 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-09 08:41:04,612 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 129 transitions. [2021-11-09 08:41:04,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 08:41:04,618 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:04,618 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:04,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:04,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:04,819 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_prependErr2REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:41:04,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash -774009728, now seen corresponding path program 1 times [2021-11-09 08:41:04,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:04,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073181824] [2021-11-09 08:41:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:04,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:04,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:04,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:41:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:04,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:41:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:04,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:41:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:04,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-09 08:41:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-09 08:41:04,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:04,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073181824] [2021-11-09 08:41:04,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073181824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:04,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:04,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:41:04,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203310875] [2021-11-09 08:41:04,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:41:04,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:04,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:41:04,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:41:04,983 INFO L87 Difference]: Start difference. First operand 112 states and 129 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-09 08:41:05,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:05,287 INFO L93 Difference]: Finished difference Result 124 states and 141 transitions. [2021-11-09 08:41:05,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:41:05,288 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2021-11-09 08:41:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:05,291 INFO L225 Difference]: With dead ends: 124 [2021-11-09 08:41:05,291 INFO L226 Difference]: Without dead ends: 124 [2021-11-09 08:41:05,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:41:05,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-09 08:41:05,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 111. [2021-11-09 08:41:05,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 75 states have (on average 1.4) internal successors, (105), 92 states have internal predecessors, (105), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-09 08:41:05,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 127 transitions. [2021-11-09 08:41:05,300 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 127 transitions. Word has length 52 [2021-11-09 08:41:05,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:05,300 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 127 transitions. [2021-11-09 08:41:05,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-09 08:41:05,301 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 127 transitions. [2021-11-09 08:41:05,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-09 08:41:05,302 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:05,302 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:05,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 08:41:05,303 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_prependErr3REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:41:05,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:05,304 INFO L85 PathProgramCache]: Analyzing trace with hash -774009727, now seen corresponding path program 1 times [2021-11-09 08:41:05,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:05,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473853944] [2021-11-09 08:41:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:05,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:05,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:05,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:41:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:05,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:41:05,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:05,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:41:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:05,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-09 08:41:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 08:41:05,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:05,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473853944] [2021-11-09 08:41:05,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473853944] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:05,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:05,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 08:41:05,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228628859] [2021-11-09 08:41:05,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 08:41:05,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:05,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 08:41:05,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 08:41:05,478 INFO L87 Difference]: Start difference. First operand 111 states and 127 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-09 08:41:05,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:05,786 INFO L93 Difference]: Finished difference Result 123 states and 139 transitions. [2021-11-09 08:41:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 08:41:05,787 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2021-11-09 08:41:05,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:05,789 INFO L225 Difference]: With dead ends: 123 [2021-11-09 08:41:05,789 INFO L226 Difference]: Without dead ends: 123 [2021-11-09 08:41:05,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 08:41:05,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-09 08:41:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 110. [2021-11-09 08:41:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 91 states have internal predecessors, (103), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-09 08:41:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2021-11-09 08:41:05,796 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 52 [2021-11-09 08:41:05,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:05,796 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2021-11-09 08:41:05,796 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, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-09 08:41:05,797 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2021-11-09 08:41:05,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 08:41:05,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:05,798 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:05,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 08:41:05,799 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr2REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:41:05,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:05,799 INFO L85 PathProgramCache]: Analyzing trace with hash 976500050, now seen corresponding path program 1 times [2021-11-09 08:41:05,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:05,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207455277] [2021-11-09 08:41:05,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:05,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:05,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:05,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:05,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:41:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:05,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:41:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:05,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:41:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:05,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-09 08:41:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:05,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:41:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-09 08:41:06,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:06,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207455277] [2021-11-09 08:41:06,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207455277] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:06,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:06,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-09 08:41:06,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026346343] [2021-11-09 08:41:06,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:41:06,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:06,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:41:06,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:41:06,031 INFO L87 Difference]: Start difference. First operand 110 states and 125 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, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-09 08:41:06,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:06,547 INFO L93 Difference]: Finished difference Result 137 states and 158 transitions. [2021-11-09 08:41:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:41:06,548 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, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 60 [2021-11-09 08:41:06,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:06,550 INFO L225 Difference]: With dead ends: 137 [2021-11-09 08:41:06,550 INFO L226 Difference]: Without dead ends: 137 [2021-11-09 08:41:06,551 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:41:06,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-09 08:41:06,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 113. [2021-11-09 08:41:06,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 79 states have (on average 1.379746835443038) internal successors, (109), 94 states have internal predecessors, (109), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-09 08:41:06,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 131 transitions. [2021-11-09 08:41:06,559 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 131 transitions. Word has length 60 [2021-11-09 08:41:06,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:06,559 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 131 transitions. [2021-11-09 08:41:06,560 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, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-09 08:41:06,560 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 131 transitions. [2021-11-09 08:41:06,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-09 08:41:06,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:06,562 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:06,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 08:41:06,562 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:41:06,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:06,563 INFO L85 PathProgramCache]: Analyzing trace with hash 976500051, now seen corresponding path program 1 times [2021-11-09 08:41:06,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:06,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35638794] [2021-11-09 08:41:06,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:06,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:06,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:06,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:06,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:41:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:06,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:41:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:06,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:41:06,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:06,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-09 08:41:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:06,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:41:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 08:41:06,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:06,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35638794] [2021-11-09 08:41:06,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35638794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:06,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:06,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-09 08:41:06,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992631472] [2021-11-09 08:41:06,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:41:06,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:06,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:41:06,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:41:06,898 INFO L87 Difference]: Start difference. First operand 113 states and 131 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, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-09 08:41:07,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:07,430 INFO L93 Difference]: Finished difference Result 143 states and 164 transitions. [2021-11-09 08:41:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 08:41:07,431 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, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 60 [2021-11-09 08:41:07,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:07,433 INFO L225 Difference]: With dead ends: 143 [2021-11-09 08:41:07,434 INFO L226 Difference]: Without dead ends: 143 [2021-11-09 08:41:07,434 INFO L786 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 [2021-11-09 08:41:07,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-09 08:41:07,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 117. [2021-11-09 08:41:07,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 83 states have (on average 1.3373493975903614) internal successors, (111), 98 states have internal predecessors, (111), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-09 08:41:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 133 transitions. [2021-11-09 08:41:07,445 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 133 transitions. Word has length 60 [2021-11-09 08:41:07,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:07,446 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 133 transitions. [2021-11-09 08:41:07,446 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, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-09 08:41:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 133 transitions. [2021-11-09 08:41:07,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 08:41:07,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:07,448 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:07,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 08:41:07,451 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr8ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:41:07,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:07,452 INFO L85 PathProgramCache]: Analyzing trace with hash 206729172, now seen corresponding path program 1 times [2021-11-09 08:41:07,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:07,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287086624] [2021-11-09 08:41:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:07,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:07,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:07,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:41:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:07,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:41:07,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:07,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:41:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:07,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-09 08:41:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:07,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:41:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 08:41:07,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:07,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287086624] [2021-11-09 08:41:07,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287086624] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:07,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:07,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-09 08:41:07,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623584069] [2021-11-09 08:41:07,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 08:41:07,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:07,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 08:41:07,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-11-09 08:41:07,753 INFO L87 Difference]: Start difference. First operand 117 states and 133 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-09 08:41:08,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:08,184 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2021-11-09 08:41:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 08:41:08,185 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-11-09 08:41:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:08,186 INFO L225 Difference]: With dead ends: 134 [2021-11-09 08:41:08,187 INFO L226 Difference]: Without dead ends: 134 [2021-11-09 08:41:08,187 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-11-09 08:41:08,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-09 08:41:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 117. [2021-11-09 08:41:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 98 states have internal predecessors, (109), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-11-09 08:41:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 131 transitions. [2021-11-09 08:41:08,195 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 131 transitions. Word has length 61 [2021-11-09 08:41:08,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:08,195 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 131 transitions. [2021-11-09 08:41:08,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-09 08:41:08,196 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 131 transitions. [2021-11-09 08:41:08,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 08:41:08,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:08,197 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 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] [2021-11-09 08:41:08,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 08:41:08,198 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_prependErr0REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:41:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:08,199 INFO L85 PathProgramCache]: Analyzing trace with hash 889012806, now seen corresponding path program 3 times [2021-11-09 08:41:08,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:08,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994326337] [2021-11-09 08:41:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:08,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:08,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:08,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:08,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:41:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:08,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:41:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:08,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:41:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:08,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 08:41:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:08,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 08:41:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-09 08:41:08,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:08,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994326337] [2021-11-09 08:41:08,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994326337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:08,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132287961] [2021-11-09 08:41:08,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:41:08,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:08,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:08,377 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:08,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 08:41:08,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:41:08,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:41:08,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 08:41:08,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-09 08:41:09,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132287961] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:09,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:09,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2021-11-09 08:41:09,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005729651] [2021-11-09 08:41:09,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 08:41:09,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:09,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 08:41:09,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-09 08:41:09,003 INFO L87 Difference]: Start difference. First operand 117 states and 131 transitions. Second operand has 11 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-09 08:41:09,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:09,309 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2021-11-09 08:41:09,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 08:41:09,310 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) Word has length 64 [2021-11-09 08:41:09,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:09,311 INFO L225 Difference]: With dead ends: 100 [2021-11-09 08:41:09,311 INFO L226 Difference]: Without dead ends: 91 [2021-11-09 08:41:09,312 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-09 08:41:09,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-09 08:41:09,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2021-11-09 08:41:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 64 states have internal predecessors, (67), 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) [2021-11-09 08:41:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-11-09 08:41:09,316 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 64 [2021-11-09 08:41:09,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:09,316 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-11-09 08:41:09,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 8 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (9), 6 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-09 08:41:09,318 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-11-09 08:41:09,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 08:41:09,319 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:09,319 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:09,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:41:09,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 08:41:09,529 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr8ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:41:09,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:09,529 INFO L85 PathProgramCache]: Analyzing trace with hash -273337886, now seen corresponding path program 1 times [2021-11-09 08:41:09,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:09,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338470143] [2021-11-09 08:41:09,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:09,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:09,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:09,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:41:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:09,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:41:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:09,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:41:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:09,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-09 08:41:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:09,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:41:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-09 08:41:09,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:09,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338470143] [2021-11-09 08:41:09,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338470143] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:41:09,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:41:09,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-09 08:41:09,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714659756] [2021-11-09 08:41:09,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 08:41:09,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:09,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 08:41:09,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2021-11-09 08:41:09,952 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-09 08:41:10,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:10,626 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2021-11-09 08:41:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 08:41:10,627 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 64 [2021-11-09 08:41:10,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:10,628 INFO L225 Difference]: With dead ends: 92 [2021-11-09 08:41:10,628 INFO L226 Difference]: Without dead ends: 92 [2021-11-09 08:41:10,629 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-11-09 08:41:10,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-09 08:41:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2021-11-09 08:41:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 65 states have internal predecessors, (68), 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) [2021-11-09 08:41:10,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-11-09 08:41:10,634 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 64 [2021-11-09 08:41:10,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:10,634 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-11-09 08:41:10,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 12 states have internal predecessors, (40), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-11-09 08:41:10,635 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-11-09 08:41:10,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 08:41:10,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:10,635 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:10,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 08:41:10,636 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr2REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:41:10,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:10,637 INFO L85 PathProgramCache]: Analyzing trace with hash 116461338, now seen corresponding path program 1 times [2021-11-09 08:41:10,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:10,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672010970] [2021-11-09 08:41:10,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:10,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:10,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:10,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:41:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:10,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:41:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:10,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:41:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:11,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-09 08:41:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:11,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:41:11,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 08:41:12,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:12,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672010970] [2021-11-09 08:41:12,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672010970] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:12,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081938169] [2021-11-09 08:41:12,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:12,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:12,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:12,010 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:12,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 08:41:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:12,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-09 08:41:12,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:12,398 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 [2021-11-09 08:41:12,579 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 [2021-11-09 08:41:16,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 08:41:16,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:16,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:16,334 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-09 08:41:16,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 122 treesize of output 80 [2021-11-09 08:41:16,356 INFO L354 Elim1Store]: treesize reduction 50, result has 37.5 percent of original size [2021-11-09 08:41:16,357 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 115 treesize of output 127 [2021-11-09 08:41:16,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:16,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2021-11-09 08:41:16,506 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 69 treesize of output 61 [2021-11-09 08:41:16,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:16,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:41:16,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 29 [2021-11-09 08:41:17,082 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:41:17,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081938169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:17,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:17,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 48 [2021-11-09 08:41:17,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743406673] [2021-11-09 08:41:17,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 08:41:17,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:17,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 08:41:17,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2212, Unknown=2, NotChecked=0, Total=2352 [2021-11-09 08:41:17,086 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 49 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 39 states have internal predecessors, (78), 7 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-09 08:41:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:41:21,423 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2021-11-09 08:41:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 08:41:21,424 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 39 states have internal predecessors, (78), 7 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 65 [2021-11-09 08:41:21,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:41:21,425 INFO L225 Difference]: With dead ends: 105 [2021-11-09 08:41:21,425 INFO L226 Difference]: Without dead ends: 105 [2021-11-09 08:41:21,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=299, Invalid=3859, Unknown=2, NotChecked=0, Total=4160 [2021-11-09 08:41:21,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-09 08:41:21,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 81. [2021-11-09 08:41:21,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 67 states have internal predecessors, (72), 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) [2021-11-09 08:41:21,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2021-11-09 08:41:21,433 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 65 [2021-11-09 08:41:21,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:41:21,434 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2021-11-09 08:41:21,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 39 states have internal predecessors, (78), 7 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-09 08:41:21,434 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2021-11-09 08:41:21,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-09 08:41:21,435 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:41:21,435 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:41:21,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-09 08:41:21,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 08:41:21,649 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr3REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:41:21,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:41:21,649 INFO L85 PathProgramCache]: Analyzing trace with hash 116461339, now seen corresponding path program 1 times [2021-11-09 08:41:21,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:41:21,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66192388] [2021-11-09 08:41:21,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:21,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:41:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:21,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:41:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:21,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:41:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:22,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:41:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:22,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:41:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:22,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-09 08:41:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:22,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:41:23,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:41:23,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:41:23,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66192388] [2021-11-09 08:41:23,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66192388] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:23,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365527681] [2021-11-09 08:41:23,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:41:23,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:41:23,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:41:23,543 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:41:23,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 08:41:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:41:23,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-09 08:41:23,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:41:23,991 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 [2021-11-09 08:41:24,766 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 37 treesize of output 29 [2021-11-09 08:41:24,771 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 [2021-11-09 08:41:48,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:48,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:48,177 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-09 08:41:48,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 215 treesize of output 169 [2021-11-09 08:41:48,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:48,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:41:48,218 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-09 08:41:48,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 198 treesize of output 152 [2021-11-09 08:41:48,248 INFO L354 Elim1Store]: treesize reduction 47, result has 21.7 percent of original size [2021-11-09 08:41:48,249 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 227 treesize of output 229 [2021-11-09 08:41:48,271 INFO L354 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-11-09 08:41:48,272 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 226 treesize of output 226 [2021-11-09 08:41:48,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:48,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2021-11-09 08:41:48,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:41:48,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2021-11-09 08:41:49,032 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-09 08:41:49,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 67 [2021-11-09 08:41:49,045 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-09 08:41:49,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 39 [2021-11-09 08:41:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:41:49,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365527681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:41:49,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:41:49,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 57 [2021-11-09 08:41:49,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096592086] [2021-11-09 08:41:49,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-09 08:41:49,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:41:49,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-09 08:41:49,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3146, Unknown=10, NotChecked=0, Total=3306 [2021-11-09 08:41:49,732 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand has 58 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 47 states have internal predecessors, (91), 7 states have call successors, (11), 4 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-09 08:42:20,375 WARN L207 SmtUtils]: Spent 7.16 s on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-11-09 08:42:28,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:28,008 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2021-11-09 08:42:28,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 08:42:28,008 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 47 states have internal predecessors, (91), 7 states have call successors, (11), 4 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) Word has length 65 [2021-11-09 08:42:28,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:28,010 INFO L225 Difference]: With dead ends: 109 [2021-11-09 08:42:28,010 INFO L226 Difference]: Without dead ends: 109 [2021-11-09 08:42:28,013 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=380, Invalid=6416, Unknown=10, NotChecked=0, Total=6806 [2021-11-09 08:42:28,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-09 08:42:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 83. [2021-11-09 08:42:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 69 states have internal predecessors, (73), 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) [2021-11-09 08:42:28,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2021-11-09 08:42:28,018 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 65 [2021-11-09 08:42:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:28,018 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2021-11-09 08:42:28,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 47 states have internal predecessors, (91), 7 states have call successors, (11), 4 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-11-09 08:42:28,019 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2021-11-09 08:42:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-09 08:42:28,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:28,020 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:28,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:42:28,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 08:42:28,226 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr8ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:42:28,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:28,226 INFO L85 PathProgramCache]: Analyzing trace with hash -684667124, now seen corresponding path program 1 times [2021-11-09 08:42:28,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:28,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412353437] [2021-11-09 08:42:28,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:28,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:28,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:28,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:42:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:28,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:42:28,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:28,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:42:28,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:28,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-09 08:42:28,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:29,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:42:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:29,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:42:29,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:29,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412353437] [2021-11-09 08:42:29,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412353437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:29,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280366553] [2021-11-09 08:42:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:29,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:29,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:29,555 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:29,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 08:42:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:29,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 08:42:29,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:30,448 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 21 treesize of output 13 [2021-11-09 08:42:35,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 08:42:37,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:37,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:37,602 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-09 08:42:37,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 119 treesize of output 73 [2021-11-09 08:42:37,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:37,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2021-11-09 08:42:37,743 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 56 treesize of output 48 [2021-11-09 08:42:38,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:38,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:42:38,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:42:38,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 24 [2021-11-09 08:42:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:42:38,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280366553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:38,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:42:38,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 45 [2021-11-09 08:42:38,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598295096] [2021-11-09 08:42:38,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 08:42:38,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:42:38,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 08:42:38,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1860, Unknown=2, NotChecked=0, Total=1980 [2021-11-09 08:42:38,212 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand has 45 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 35 states have internal predecessors, (74), 7 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-09 08:42:50,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:42:50,592 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-11-09 08:42:50,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 08:42:50,593 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 35 states have internal predecessors, (74), 7 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 66 [2021-11-09 08:42:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:42:50,594 INFO L225 Difference]: With dead ends: 99 [2021-11-09 08:42:50,594 INFO L226 Difference]: Without dead ends: 99 [2021-11-09 08:42:50,596 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=269, Invalid=3761, Unknown=2, NotChecked=0, Total=4032 [2021-11-09 08:42:50,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-09 08:42:50,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-11-09 08:42:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 60 states have (on average 1.2) internal successors, (72), 69 states have internal predecessors, (72), 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) [2021-11-09 08:42:50,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2021-11-09 08:42:50,601 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 66 [2021-11-09 08:42:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:42:50,601 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2021-11-09 08:42:50,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 35 states have internal predecessors, (74), 7 states have call successors, (11), 4 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-09 08:42:50,602 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2021-11-09 08:42:50,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 08:42:50,603 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:42:50,603 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:42:50,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-09 08:42:50,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 08:42:50,829 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr8ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:42:50,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:42:50,829 INFO L85 PathProgramCache]: Analyzing trace with hash -77600854, now seen corresponding path program 1 times [2021-11-09 08:42:50,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:42:50,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581164284] [2021-11-09 08:42:50,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:50,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:42:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:51,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:42:51,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:51,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:42:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:51,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:42:51,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:51,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:42:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:51,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-09 08:42:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:53,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:42:53,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 08:42:54,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:42:54,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581164284] [2021-11-09 08:42:54,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581164284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:42:54,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356857760] [2021-11-09 08:42:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:42:54,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:42:54,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:42:54,304 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:42:54,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 08:42:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:42:54,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 121 conjunts are in the unsatisfiable core [2021-11-09 08:42:54,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:42:54,969 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 [2021-11-09 08:42:55,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 08:42:55,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:42:55,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 08:42:55,721 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 40 treesize of output 28 [2021-11-09 08:42:55,725 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 28 treesize of output 24 [2021-11-09 08:42:55,732 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 21 treesize of output 17 [2021-11-09 08:42:55,737 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 [2021-11-09 08:43:17,429 WARN L207 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 62 [2021-11-09 08:43:34,176 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-11-09 08:43:34,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 216 treesize of output 190 [2021-11-09 08:43:34,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:34,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:34,198 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 08:43:34,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 149 [2021-11-09 08:43:34,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:34,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:43:34,228 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-09 08:43:34,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 174 treesize of output 124 [2021-11-09 08:43:34,253 INFO L354 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-11-09 08:43:34,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 191 [2021-11-09 08:43:34,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:43:34,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 22 [2021-11-09 08:43:34,979 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-09 08:43:34,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 61 [2021-11-09 08:43:34,992 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-09 08:43:34,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 37 [2021-11-09 08:43:35,518 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-09 08:43:35,518 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 21 treesize of output 16 [2021-11-09 08:43:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:43:35,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356857760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:43:35,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:43:35,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 56 [2021-11-09 08:43:35,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347859076] [2021-11-09 08:43:35,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-09 08:43:35,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:43:35,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-09 08:43:35,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2934, Unknown=11, NotChecked=0, Total=3080 [2021-11-09 08:43:35,634 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 56 states, 50 states have (on average 1.84) internal successors, (92), 46 states have internal predecessors, (92), 8 states have call successors, (11), 4 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-09 08:44:40,369 WARN L207 SmtUtils]: Spent 12.21 s on a formula simplification. DAG size of input: 109 DAG size of output: 82 [2021-11-09 08:44:56,733 WARN L207 SmtUtils]: Spent 12.16 s on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2021-11-09 08:45:02,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:02,119 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2021-11-09 08:45:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 08:45:02,120 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 50 states have (on average 1.84) internal successors, (92), 46 states have internal predecessors, (92), 8 states have call successors, (11), 4 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 69 [2021-11-09 08:45:02,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:02,121 INFO L225 Difference]: With dead ends: 97 [2021-11-09 08:45:02,122 INFO L226 Difference]: Without dead ends: 97 [2021-11-09 08:45:02,124 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 92.9s TimeCoverageRelationStatistics Valid=329, Invalid=6131, Unknown=20, NotChecked=0, Total=6480 [2021-11-09 08:45:02,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-09 08:45:02,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 84. [2021-11-09 08:45:02,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 70 states have internal predecessors, (73), 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) [2021-11-09 08:45:02,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-11-09 08:45:02,129 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 69 [2021-11-09 08:45:02,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:02,130 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-11-09 08:45:02,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 50 states have (on average 1.84) internal successors, (92), 46 states have internal predecessors, (92), 8 states have call successors, (11), 4 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-09 08:45:02,130 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-11-09 08:45:02,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-09 08:45:02,131 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:02,131 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:02,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:45:02,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:02,341 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr2REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:45:02,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:02,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1889342034, now seen corresponding path program 2 times [2021-11-09 08:45:02,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:02,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504957976] [2021-11-09 08:45:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:02,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:02,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:45:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:02,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:45:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:03,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:45:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:03,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:45:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:03,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-09 08:45:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:04,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:45:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:05,460 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:45:05,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:05,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504957976] [2021-11-09 08:45:05,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504957976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:05,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739396699] [2021-11-09 08:45:05,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:45:05,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:05,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:45:05,462 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:45:05,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 08:45:06,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:45:06,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:45:06,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-09 08:45:06,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:45:06,134 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 [2021-11-09 08:45:06,555 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-11-09 08:45:06,556 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 19 treesize of output 16 [2021-11-09 08:45:06,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-09 08:45:07,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:45:07,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 33 [2021-11-09 08:45:07,424 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:45:07,425 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 30 treesize of output 26 [2021-11-09 08:45:07,430 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 [2021-11-09 08:45:36,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:36,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:36,890 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-09 08:45:36,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 236 treesize of output 194 [2021-11-09 08:45:36,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:36,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:36,938 INFO L354 Elim1Store]: treesize reduction 64, result has 31.2 percent of original size [2021-11-09 08:45:36,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 219 treesize of output 170 [2021-11-09 08:45:36,979 INFO L354 Elim1Store]: treesize reduction 156, result has 24.6 percent of original size [2021-11-09 08:45:36,980 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 283 treesize of output 302 [2021-11-09 08:45:37,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:37,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2021-11-09 08:45:37,108 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:45:37,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 193 treesize of output 91 [2021-11-09 08:45:37,805 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-09 08:45:37,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 134 [2021-11-09 08:45:38,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:45:38,633 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-09 08:45:38,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 50 [2021-11-09 08:45:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 29 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:45:39,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739396699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:39,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:45:39,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 70 [2021-11-09 08:45:39,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629071808] [2021-11-09 08:45:39,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-09 08:45:39,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:45:39,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-09 08:45:39,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=4721, Unknown=12, NotChecked=0, Total=4970 [2021-11-09 08:45:39,586 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 71 states, 64 states have (on average 1.59375) internal successors, (102), 58 states have internal predecessors, (102), 8 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-09 08:45:48,975 WARN L207 SmtUtils]: Spent 7.55 s on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-11-09 08:45:51,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:45:51,929 INFO L93 Difference]: Finished difference Result 110 states and 117 transitions. [2021-11-09 08:45:51,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 08:45:51,930 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 64 states have (on average 1.59375) internal successors, (102), 58 states have internal predecessors, (102), 8 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) Word has length 70 [2021-11-09 08:45:51,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:45:51,931 INFO L225 Difference]: With dead ends: 110 [2021-11-09 08:45:51,931 INFO L226 Difference]: Without dead ends: 110 [2021-11-09 08:45:51,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 42.9s TimeCoverageRelationStatistics Valid=511, Invalid=7667, Unknown=12, NotChecked=0, Total=8190 [2021-11-09 08:45:51,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-09 08:45:51,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 86. [2021-11-09 08:45:51,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 72 states have internal predecessors, (77), 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) [2021-11-09 08:45:51,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2021-11-09 08:45:51,941 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 70 [2021-11-09 08:45:51,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:45:51,941 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2021-11-09 08:45:51,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 64 states have (on average 1.59375) internal successors, (102), 58 states have internal predecessors, (102), 8 states have call successors, (13), 5 states have call predecessors, (13), 10 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2021-11-09 08:45:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2021-11-09 08:45:51,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-09 08:45:51,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:45:51,943 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:45:51,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:45:52,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:52,165 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr3REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:45:52,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:45:52,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1889342035, now seen corresponding path program 2 times [2021-11-09 08:45:52,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:45:52,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460503865] [2021-11-09 08:45:52,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:45:52,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:45:52,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:52,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:45:52,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:52,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:45:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:53,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:45:53,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:53,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:45:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:53,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-09 08:45:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:56,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:45:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:45:56,921 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:45:56,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:45:56,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460503865] [2021-11-09 08:45:56,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460503865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:45:56,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382534439] [2021-11-09 08:45:56,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:45:56,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:45:56,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:45:56,922 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:45:56,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 08:45:57,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:45:57,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:45:57,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 155 conjunts are in the unsatisfiable core [2021-11-09 08:45:57,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:45:57,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:45:57,674 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 [2021-11-09 08:45:57,752 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 [2021-11-09 08:45:58,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:45:58,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2021-11-09 08:45:59,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-11-09 08:45:59,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2021-11-09 08:45:59,547 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 08:45:59,548 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 19 treesize of output 19 [2021-11-09 08:45:59,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:45:59,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 57 [2021-11-09 08:45:59,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:45:59,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42 [2021-11-09 08:46:25,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:46:25,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:25,589 INFO L354 Elim1Store]: treesize reduction 88, result has 29.6 percent of original size [2021-11-09 08:46:25,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 280 treesize of output 244 [2021-11-09 08:46:25,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:46:25,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:46:25,639 INFO L354 Elim1Store]: treesize reduction 64, result has 31.2 percent of original size [2021-11-09 08:46:25,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 282 treesize of output 205 [2021-11-09 08:46:25,669 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 08:46:25,669 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 370 treesize of output 354 [2021-11-09 08:46:25,702 INFO L354 Elim1Store]: treesize reduction 132, result has 19.0 percent of original size [2021-11-09 08:46:25,703 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 348 treesize of output 339 [2021-11-09 08:46:25,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:46:25,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:46:25,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 33 [2021-11-09 08:46:25,862 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:46:25,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 204 treesize of output 126 [2021-11-09 08:46:30,467 INFO L354 Elim1Store]: treesize reduction 110, result has 9.1 percent of original size [2021-11-09 08:46:30,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 198 treesize of output 103 [2021-11-09 08:46:30,489 INFO L354 Elim1Store]: treesize reduction 86, result has 7.5 percent of original size [2021-11-09 08:46:30,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 64 [2021-11-09 08:46:33,170 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:46:33,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382534439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:46:33,171 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:46:33,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 42] total 78 [2021-11-09 08:46:33,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541843420] [2021-11-09 08:46:33,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-09 08:46:33,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:46:33,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-09 08:46:33,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=5923, Unknown=10, NotChecked=0, Total=6162 [2021-11-09 08:46:33,174 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 79 states, 73 states have (on average 1.5342465753424657) internal successors, (112), 65 states have internal predecessors, (112), 9 states have call successors, (13), 6 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2021-11-09 08:47:04,785 WARN L207 SmtUtils]: Spent 7.81 s on a formula simplification. DAG size of input: 87 DAG size of output: 62 [2021-11-09 08:47:11,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:47:11,972 INFO L93 Difference]: Finished difference Result 114 states and 121 transitions. [2021-11-09 08:47:11,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 08:47:11,973 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 73 states have (on average 1.5342465753424657) internal successors, (112), 65 states have internal predecessors, (112), 9 states have call successors, (13), 6 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) Word has length 70 [2021-11-09 08:47:11,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:47:11,975 INFO L225 Difference]: With dead ends: 114 [2021-11-09 08:47:11,975 INFO L226 Difference]: Without dead ends: 114 [2021-11-09 08:47:11,979 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2571 ImplicationChecksByTransitivity, 48.3s TimeCoverageRelationStatistics Valid=572, Invalid=11190, Unknown=10, NotChecked=0, Total=11772 [2021-11-09 08:47:11,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-09 08:47:11,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 88. [2021-11-09 08:47:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.2) internal successors, (78), 74 states have internal predecessors, (78), 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) [2021-11-09 08:47:11,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2021-11-09 08:47:11,983 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 70 [2021-11-09 08:47:11,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:47:11,984 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2021-11-09 08:47:11,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 73 states have (on average 1.5342465753424657) internal successors, (112), 65 states have internal predecessors, (112), 9 states have call successors, (13), 6 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 9 states have call successors, (11) [2021-11-09 08:47:11,984 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2021-11-09 08:47:11,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 08:47:11,985 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:47:11,985 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:47:12,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:47:12,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-09 08:47:12,201 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr8ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:47:12,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:47:12,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1559940396, now seen corresponding path program 2 times [2021-11-09 08:47:12,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:47:12,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850487685] [2021-11-09 08:47:12,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:47:12,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:47:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:12,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:47:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:12,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:47:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:13,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:47:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:13,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:47:13,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:13,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-09 08:47:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:14,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:47:14,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:47:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:47:15,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:47:15,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850487685] [2021-11-09 08:47:15,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850487685] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:15,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75338413] [2021-11-09 08:47:15,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:47:15,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:47:15,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:47:15,437 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:47:15,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 08:47:16,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:47:16,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:47:16,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-09 08:47:16,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:47:16,437 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 [2021-11-09 08:47:16,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-09 08:47:16,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:47:16,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 28 [2021-11-09 08:47:16,912 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 21 treesize of output 17 [2021-11-09 08:47:16,916 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 [2021-11-09 08:47:49,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:49,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:47:49,119 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-09 08:47:49,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 213 treesize of output 171 [2021-11-09 08:47:49,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:49,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:47:49,189 INFO L354 Elim1Store]: treesize reduction 64, result has 31.2 percent of original size [2021-11-09 08:47:49,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 196 treesize of output 159 [2021-11-09 08:47:49,221 INFO L354 Elim1Store]: treesize reduction 4, result has 80.0 percent of original size [2021-11-09 08:47:49,221 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 248 treesize of output 248 [2021-11-09 08:47:49,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:49,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2021-11-09 08:47:49,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:49,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:49,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 37 [2021-11-09 08:47:50,050 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-09 08:47:50,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 85 [2021-11-09 08:47:50,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:47:50,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:47:50,686 INFO L354 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2021-11-09 08:47:50,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 31 [2021-11-09 08:47:50,714 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:47:50,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75338413] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:47:50,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:47:50,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 38] total 59 [2021-11-09 08:47:50,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435794961] [2021-11-09 08:47:50,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-09 08:47:50,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:47:50,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-09 08:47:50,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3254, Unknown=13, NotChecked=0, Total=3422 [2021-11-09 08:47:50,718 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 59 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 48 states have internal predecessors, (87), 8 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-09 08:48:05,364 WARN L207 SmtUtils]: Spent 8.13 s on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2021-11-09 08:48:08,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:48:08,345 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-11-09 08:48:08,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-09 08:48:08,346 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 48 states have internal predecessors, (87), 8 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 71 [2021-11-09 08:48:08,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:48:08,348 INFO L225 Difference]: With dead ends: 104 [2021-11-09 08:48:08,348 INFO L226 Difference]: Without dead ends: 104 [2021-11-09 08:48:08,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 45.8s TimeCoverageRelationStatistics Valid=399, Invalid=6560, Unknown=13, NotChecked=0, Total=6972 [2021-11-09 08:48:08,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-09 08:48:08,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 88. [2021-11-09 08:48:08,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 74 states have internal predecessors, (77), 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) [2021-11-09 08:48:08,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-11-09 08:48:08,353 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 71 [2021-11-09 08:48:08,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:48:08,354 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-11-09 08:48:08,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 48 states have internal predecessors, (87), 8 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-09 08:48:08,355 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-11-09 08:48:08,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-09 08:48:08,356 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:48:08,356 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:48:08,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:48:08,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 08:48:08,564 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr8ASSERT_VIOLATIONMEMORY_LEAK === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:48:08,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:48:08,565 INFO L85 PathProgramCache]: Analyzing trace with hash -597192990, now seen corresponding path program 2 times [2021-11-09 08:48:08,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:48:08,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939244135] [2021-11-09 08:48:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:48:08,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:48:08,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:09,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:48:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:09,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:48:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:10,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:48:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:10,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:48:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:11,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-09 08:48:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:13,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:48:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:48:15,079 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 2 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:48:15,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:48:15,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939244135] [2021-11-09 08:48:15,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939244135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:48:15,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030213292] [2021-11-09 08:48:15,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 08:48:15,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:48:15,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:48:15,081 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:48:15,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 08:48:16,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 08:48:16,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:48:16,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 174 conjunts are in the unsatisfiable core [2021-11-09 08:48:16,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:48:16,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 08:48:16,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 08:48:17,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:17,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 08:48:17,217 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 [2021-11-09 08:48:24,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:24,445 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-09 08:48:24,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 31 [2021-11-09 08:48:24,472 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:48:24,473 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 [2021-11-09 08:48:24,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 08:48:24,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2021-11-09 08:48:24,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:48:24,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 47 [2021-11-09 08:48:26,162 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:48:26,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 48 [2021-11-09 08:48:26,172 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:48:26,173 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 45 treesize of output 41 [2021-11-09 08:48:26,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 08:48:26,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 27 [2021-11-09 08:48:26,188 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 [2021-11-09 08:48:51,271 WARN L207 SmtUtils]: Spent 6.03 s on a formula simplification that was a NOOP. DAG size: 57 [2021-11-09 08:49:12,702 INFO L354 Elim1Store]: treesize reduction 114, result has 16.8 percent of original size [2021-11-09 08:49:12,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 285 treesize of output 259 [2021-11-09 08:49:12,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:12,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:49:12,779 INFO L354 Elim1Store]: treesize reduction 88, result has 29.6 percent of original size [2021-11-09 08:49:12,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 269 treesize of output 241 [2021-11-09 08:49:12,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:12,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:49:12,838 INFO L354 Elim1Store]: treesize reduction 64, result has 31.2 percent of original size [2021-11-09 08:49:12,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 271 treesize of output 194 [2021-11-09 08:49:12,876 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-11-09 08:49:12,876 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 351 treesize of output 341 [2021-11-09 08:49:12,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:12,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:12,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:49:12,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 33 [2021-11-09 08:49:13,016 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-09 08:49:13,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 205 treesize of output 131 [2021-11-09 08:49:16,586 INFO L354 Elim1Store]: treesize reduction 110, result has 9.1 percent of original size [2021-11-09 08:49:16,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 199 treesize of output 96 [2021-11-09 08:49:16,621 INFO L354 Elim1Store]: treesize reduction 86, result has 7.5 percent of original size [2021-11-09 08:49:16,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 61 [2021-11-09 08:49:17,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 08:49:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 3 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:49:17,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030213292] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:49:17,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:49:17,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 89 [2021-11-09 08:49:17,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218072942] [2021-11-09 08:49:17,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-09 08:49:17,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:49:17,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-09 08:49:17,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=7617, Unknown=16, NotChecked=0, Total=7832 [2021-11-09 08:49:17,719 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 89 states, 83 states have (on average 1.4457831325301205) internal successors, (120), 75 states have internal predecessors, (120), 11 states have call successors, (13), 5 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-09 08:51:06,616 WARN L207 SmtUtils]: Spent 12.32 s on a formula simplification. DAG size of input: 127 DAG size of output: 80 [2021-11-09 08:51:24,263 WARN L207 SmtUtils]: Spent 12.30 s on a formula simplification. DAG size of input: 121 DAG size of output: 72 [2021-11-09 08:51:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:51:42,435 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2021-11-09 08:51:42,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 08:51:42,436 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 83 states have (on average 1.4457831325301205) internal successors, (120), 75 states have internal predecessors, (120), 11 states have call successors, (13), 5 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 74 [2021-11-09 08:51:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 08:51:42,437 INFO L225 Difference]: With dead ends: 103 [2021-11-09 08:51:42,438 INFO L226 Difference]: Without dead ends: 103 [2021-11-09 08:51:42,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 154.2s TimeCoverageRelationStatistics Valid=548, Invalid=14921, Unknown=31, NotChecked=0, Total=15500 [2021-11-09 08:51:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-09 08:51:42,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 89. [2021-11-09 08:51:42,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 75 states have internal predecessors, (78), 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) [2021-11-09 08:51:42,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-11-09 08:51:42,444 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 74 [2021-11-09 08:51:42,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 08:51:42,445 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-11-09 08:51:42,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 83 states have (on average 1.4457831325301205) internal successors, (120), 75 states have internal predecessors, (120), 11 states have call successors, (13), 5 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-09 08:51:42,446 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-11-09 08:51:42,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-09 08:51:42,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 08:51:42,447 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 08:51:42,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-09 08:51:42,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 08:51:42,655 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr2REQUIRES_VIOLATION === [sll_destroyErr0REQUIRES_VIOLATION, sll_destroyErr1REQUIRES_VIOLATION, sll_destroyErr2ASSERT_VIOLATIONMEMORY_FREE, sll_destroyErr3ASSERT_VIOLATIONMEMORY_FREE (and 23 more)] === [2021-11-09 08:51:42,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:51:42,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1333112294, now seen corresponding path program 3 times [2021-11-09 08:51:42,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:51:42,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76779043] [2021-11-09 08:51:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:51:42,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:51:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:44,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 08:51:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:44,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-09 08:51:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:45,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-09 08:51:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:46,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-11-09 08:51:46,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:47,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-09 08:51:47,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:52,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-09 08:51:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:51:53,120 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 08:51:53,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:51:53,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76779043] [2021-11-09 08:51:53,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76779043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:51:53,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446027660] [2021-11-09 08:51:53,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 08:51:53,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 08:51:53,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:51:53,122 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 08:51:53,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32b71704-1b2f-4a75-a10c-af97004013df/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 08:51:54,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 08:51:54,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 08:51:54,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 172 conjunts are in the unsatisfiable core [2021-11-09 08:51:54,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:51:55,051 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 [2021-11-09 08:51:55,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 08:51:55,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-09 08:51:56,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-09 08:51:56,166 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 16 treesize of output 14 [2021-11-09 08:51:56,170 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 [2021-11-09 08:51:57,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:51:57,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:51:57,419 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-09 08:51:57,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 22 [2021-11-09 08:51:57,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:51:57,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:51:57,446 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-09 08:51:57,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 22 [2021-11-09 08:51:57,479 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 08:51:57,480 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 [2021-11-09 08:51:58,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:51:58,031 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-09 08:51:58,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 64 [2021-11-09 08:51:58,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 08:51:58,051 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-09 08:51:58,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 72 [2021-11-09 08:51:59,452 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-09 08:51:59,452 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 108 treesize of output 54 [2021-11-09 08:51:59,465 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-09 08:51:59,466 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 45 treesize of output 33 [2021-11-09 08:51:59,483 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 08:51:59,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 08:52:50,866 INFO L354 Elim1Store]: treesize reduction 452, result has 15.8 percent of original size [2021-11-09 08:52:50,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 406 treesize of output 305 [2021-11-09 08:52:51,186 INFO L354 Elim1Store]: treesize reduction 1032, result has 14.1 percent of original size [2021-11-09 08:52:51,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1073 treesize of output 798 [2021-11-09 08:52:51,246 INFO L354 Elim1Store]: treesize reduction 53, result has 27.4 percent of original size [2021-11-09 08:52:51,247 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 826 treesize of output 816 [2021-11-09 08:52:51,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:52:51,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:52:51,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:52:51,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:52:51,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 40 [2021-11-09 08:52:51,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:52:51,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:52:51,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:52:51,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:52:51,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 36 [2021-11-09 08:52:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:52:51,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:52:51,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:52:51,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 08:52:51,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 36 [2021-11-09 08:52:51,566 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-09 08:52:51,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 243 treesize of output 160 [2021-11-09 08:53:03,758 INFO L354 Elim1Store]: treesize reduction 271, result has 4.9 percent of original size [2021-11-09 08:53:03,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 13 new quantified variables, introduced 21 case distinctions, treesize of input 278 treesize of output 129 [2021-11-09 08:53:03,829 INFO L354 Elim1Store]: treesize reduction 231, result has 4.1 percent of original size [2021-11-09 08:53:03,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 87 treesize of output 68 [2021-11-09 08:53:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-09 08:53:04,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446027660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 08:53:04,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 08:53:04,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 90 [2021-11-09 08:53:04,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476797012] [2021-11-09 08:53:04,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-09 08:53:04,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:53:04,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-09 08:53:04,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=7758, Unknown=21, NotChecked=0, Total=8010 [2021-11-09 08:53:04,295 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 90 states, 84 states have (on average 1.4285714285714286) internal successors, (120), 77 states have internal predecessors, (120), 11 states have call successors, (13), 4 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-09 08:54:24,509 WARN L207 SmtUtils]: Spent 9.33 s on a formula simplification. DAG size of input: 152 DAG size of output: 69