./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt --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 5b8a3c71378af91196ed2f84e64deb923f93cbb4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:48:11,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:48:11,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:48:11,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:48:11,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:48:11,173 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:48:11,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:48:11,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:48:11,183 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:48:11,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:48:11,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:48:11,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:48:11,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:48:11,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:48:11,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:48:11,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:48:11,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:48:11,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:48:11,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:48:11,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:48:11,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:48:11,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:48:11,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:48:11,235 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:48:11,240 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:48:11,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:48:11,241 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:48:11,242 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:48:11,243 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:48:11,244 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:48:11,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:48:11,245 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:48:11,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:48:11,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:48:11,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:48:11,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:48:11,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:48:11,255 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:48:11,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:48:11,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:48:11,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:48:11,258 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-13 00:48:11,307 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:48:11,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:48:11,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:48:11,308 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:48:11,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:48:11,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:48:11,309 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:48:11,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:48:11,310 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:48:11,310 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:48:11,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:48:11,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:48:11,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:48:11,311 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 00:48:11,311 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 00:48:11,311 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 00:48:11,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:48:11,311 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 00:48:11,312 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:48:11,312 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:48:11,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:48:11,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:48:11,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:48:11,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:48:11,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:48:11,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:48:11,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:48:11,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:48:11,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:48:11,313 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_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b8a3c71378af91196ed2f84e64deb923f93cbb4 [2021-10-13 00:48:11,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:48:11,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:48:11,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:48:11,665 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:48:11,666 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:48:11,667 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/list-simple/sll2c_update_all.i [2021-10-13 00:48:11,747 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/data/6f84d5c6b/a93801a5ab8045a98e9a64114a1d11c7/FLAG492774d30 [2021-10-13 00:48:12,404 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:48:12,405 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/sv-benchmarks/c/list-simple/sll2c_update_all.i [2021-10-13 00:48:12,421 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/data/6f84d5c6b/a93801a5ab8045a98e9a64114a1d11c7/FLAG492774d30 [2021-10-13 00:48:12,665 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/data/6f84d5c6b/a93801a5ab8045a98e9a64114a1d11c7 [2021-10-13 00:48:12,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:48:12,672 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 00:48:12,676 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:48:12,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:48:12,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:48:12,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:48:12" (1/1) ... [2021-10-13 00:48:12,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cc409d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:48:12, skipping insertion in model container [2021-10-13 00:48:12,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:48:12" (1/1) ... [2021-10-13 00:48:12,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:48:12,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:48:13,039 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_63962906-f9de-47c9-8aeb-8d0e6986d229/sv-benchmarks/c/list-simple/sll2c_update_all.i[24418,24431] [2021-10-13 00:48:13,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:48:13,050 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:48:13,126 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_63962906-f9de-47c9-8aeb-8d0e6986d229/sv-benchmarks/c/list-simple/sll2c_update_all.i[24418,24431] [2021-10-13 00:48:13,127 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:48:13,166 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:48:13,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:48:13 WrapperNode [2021-10-13 00:48:13,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:48:13,169 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:48:13,169 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:48:13,169 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:48:13,181 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:48:13" (1/1) ... [2021-10-13 00:48:13,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:48:13" (1/1) ... [2021-10-13 00:48:13,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:48:13" (1/1) ... [2021-10-13 00:48:13,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:48:13" (1/1) ... [2021-10-13 00:48:13,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:48:13" (1/1) ... [2021-10-13 00:48:13,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:48:13" (1/1) ... [2021-10-13 00:48:13,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:48:13" (1/1) ... [2021-10-13 00:48:13,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:48:13,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:48:13,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:48:13,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:48:13,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:48:13" (1/1) ... [2021-10-13 00:48:13,303 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:48:13,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:48:13,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:48:13,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:48:13,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 00:48:13,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:48:13,393 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 00:48:13,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 00:48:13,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 00:48:13,399 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-13 00:48:13,399 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-10-13 00:48:13,399 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2021-10-13 00:48:13,400 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_destroy [2021-10-13 00:48:13,400 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_get_data_at [2021-10-13 00:48:13,401 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_update_at [2021-10-13 00:48:13,401 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 00:48:13,401 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 00:48:13,401 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 00:48:13,401 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 00:48:13,401 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 00:48:13,402 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 00:48:13,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:48:13,402 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 00:48:13,402 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 00:48:13,402 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 00:48:13,402 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 00:48:13,403 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 00:48:13,403 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 00:48:13,403 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 00:48:13,403 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 00:48:13,403 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 00:48:13,403 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 00:48:13,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 00:48:13,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 00:48:13,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 00:48:13,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 00:48:13,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 00:48:13,404 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 00:48:13,405 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 00:48:13,405 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 00:48:13,405 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 00:48:13,405 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 00:48:13,405 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 00:48:13,405 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 00:48:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 00:48:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 00:48:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 00:48:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 00:48:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 00:48:13,406 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 00:48:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 00:48:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 00:48:13,407 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 00:48:13,408 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 00:48:13,408 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 00:48:13,409 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 00:48:13,409 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 00:48:13,409 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 00:48:13,409 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 00:48:13,410 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 00:48:13,410 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 00:48:13,410 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 00:48:13,410 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 00:48:13,410 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 00:48:13,410 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 00:48:13,411 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 00:48:13,411 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 00:48:13,411 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 00:48:13,411 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 00:48:13,411 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 00:48:13,413 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 00:48:13,413 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 00:48:13,414 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 00:48:13,414 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 00:48:13,414 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 00:48:13,414 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 00:48:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 00:48:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 00:48:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-13 00:48:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 00:48:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 00:48:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 00:48:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 00:48:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 00:48:13,416 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 00:48:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 00:48:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 00:48:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 00:48:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 00:48:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 00:48:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 00:48:13,417 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 00:48:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 00:48:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 00:48:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 00:48:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 00:48:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 00:48:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 00:48:13,418 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 00:48:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 00:48:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 00:48:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 00:48:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 00:48:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 00:48:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 00:48:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 00:48:13,419 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 00:48:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 00:48:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 00:48:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 00:48:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 00:48:13,420 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 00:48:13,421 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 00:48:13,421 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 00:48:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 00:48:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 00:48:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 00:48:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 00:48:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 00:48:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 00:48:13,422 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 00:48:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 00:48:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 00:48:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 00:48:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 00:48:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 00:48:13,423 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-13 00:48:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-10-13 00:48:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 00:48:13,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 00:48:13,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 00:48:13,425 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2021-10-13 00:48:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_destroy [2021-10-13 00:48:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 00:48:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 00:48:13,428 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_get_data_at [2021-10-13 00:48:13,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 00:48:13,430 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_update_at [2021-10-13 00:48:13,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 00:48:13,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 00:48:13,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:48:13,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:48:13,785 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-13 00:48:14,046 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:48:14,046 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-13 00:48:14,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:48:14 BoogieIcfgContainer [2021-10-13 00:48:14,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:48:14,050 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:48:14,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:48:14,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:48:14,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:48:12" (1/3) ... [2021-10-13 00:48:14,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@944ed69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:48:14, skipping insertion in model container [2021-10-13 00:48:14,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:48:13" (2/3) ... [2021-10-13 00:48:14,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@944ed69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:48:14, skipping insertion in model container [2021-10-13 00:48:14,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:48:14" (3/3) ... [2021-10-13 00:48:14,057 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2c_update_all.i [2021-10-13 00:48:14,062 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:48:14,062 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2021-10-13 00:48:14,106 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:48:14,112 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, mConcurrency=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 [2021-10-13 00:48:14,112 INFO L340 AbstractCegarLoop]: Starting to check reachability of 28 error locations. [2021-10-13 00:48:14,140 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 59 states have (on average 1.728813559322034) internal successors, (102), 87 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-13 00:48:14,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 00:48:14,147 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:48:14,148 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:48:14,148 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:48:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:48:14,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1445934727, now seen corresponding path program 1 times [2021-10-13 00:48:14,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:48:14,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647400190] [2021-10-13 00:48:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:14,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:48:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:14,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:48:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:48:14,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:48:14,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647400190] [2021-10-13 00:48:14,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647400190] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:48:14,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:48:14,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:48:14,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457348412] [2021-10-13 00:48:14,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:48:14,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:48:14,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:48:14,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:48:14,447 INFO L87 Difference]: Start difference. First operand has 104 states, 59 states have (on average 1.728813559322034) internal successors, (102), 87 states have internal predecessors, (102), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:48:14,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:48:14,733 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-10-13 00:48:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:48:14,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-13 00:48:14,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:48:14,745 INFO L225 Difference]: With dead ends: 121 [2021-10-13 00:48:14,745 INFO L226 Difference]: Without dead ends: 115 [2021-10-13 00:48:14,746 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:48:14,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-13 00:48:14,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 96. [2021-10-13 00:48:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 56 states have (on average 1.5714285714285714) internal successors, (88), 81 states have internal predecessors, (88), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-13 00:48:14,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2021-10-13 00:48:14,789 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 12 [2021-10-13 00:48:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:48:14,789 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2021-10-13 00:48:14,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:48:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2021-10-13 00:48:14,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 00:48:14,790 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:48:14,790 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:48:14,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:48:14,791 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:48:14,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:48:14,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1445934728, now seen corresponding path program 1 times [2021-10-13 00:48:14,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:48:14,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556130795] [2021-10-13 00:48:14,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:14,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:48:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:14,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:48:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:48:14,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:48:14,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556130795] [2021-10-13 00:48:14,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556130795] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:48:14,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:48:14,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:48:14,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908029481] [2021-10-13 00:48:14,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:48:14,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:48:14,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:48:14,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:48:14,914 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:48:15,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:48:15,142 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2021-10-13 00:48:15,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:48:15,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-13 00:48:15,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:48:15,144 INFO L225 Difference]: With dead ends: 113 [2021-10-13 00:48:15,144 INFO L226 Difference]: Without dead ends: 113 [2021-10-13 00:48:15,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:48:15,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-13 00:48:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 94. [2021-10-13 00:48:15,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.5357142857142858) internal successors, (86), 79 states have internal predecessors, (86), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-13 00:48:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-10-13 00:48:15,155 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 12 [2021-10-13 00:48:15,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:48:15,155 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-10-13 00:48:15,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 00:48:15,156 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-10-13 00:48:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 00:48:15,157 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:48:15,157 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:48:15,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:48:15,157 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:48:15,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:48:15,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1652501893, now seen corresponding path program 1 times [2021-10-13 00:48:15,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:48:15,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156071421] [2021-10-13 00:48:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:15,159 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:48:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:15,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:48:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:15,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-13 00:48:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:48:15,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:48:15,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156071421] [2021-10-13 00:48:15,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156071421] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:48:15,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:48:15,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 00:48:15,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559268115] [2021-10-13 00:48:15,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:48:15,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:48:15,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:48:15,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:48:15,365 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 00:48:15,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:48:15,848 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2021-10-13 00:48:15,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:48:15,850 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2021-10-13 00:48:15,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:48:15,855 INFO L225 Difference]: With dead ends: 120 [2021-10-13 00:48:15,855 INFO L226 Difference]: Without dead ends: 120 [2021-10-13 00:48:15,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:48:15,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-10-13 00:48:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2021-10-13 00:48:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 80 states have internal predecessors, (87), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-13 00:48:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2021-10-13 00:48:15,876 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 19 [2021-10-13 00:48:15,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:48:15,876 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2021-10-13 00:48:15,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 4 states have internal predecessors, (13), 3 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 00:48:15,877 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2021-10-13 00:48:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:48:15,878 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:48:15,878 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:48:15,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 00:48:15,878 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_circular_createErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:48:15,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:48:15,879 INFO L82 PathProgramCache]: Analyzing trace with hash 173693975, now seen corresponding path program 1 times [2021-10-13 00:48:15,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:48:15,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721165617] [2021-10-13 00:48:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:15,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:48:15,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:15,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:48:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:15,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-13 00:48:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:15,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-13 00:48:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 00:48:16,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:48:16,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721165617] [2021-10-13 00:48:16,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721165617] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:48:16,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:48:16,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 00:48:16,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692560752] [2021-10-13 00:48:16,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:48:16,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:48:16,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:48:16,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:48:16,018 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:48:16,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:48:16,434 INFO L93 Difference]: Finished difference Result 114 states and 123 transitions. [2021-10-13 00:48:16,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:48:16,435 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-10-13 00:48:16,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:48:16,437 INFO L225 Difference]: With dead ends: 114 [2021-10-13 00:48:16,437 INFO L226 Difference]: Without dead ends: 114 [2021-10-13 00:48:16,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:48:16,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-13 00:48:16,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2021-10-13 00:48:16,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 57 states have (on average 1.5087719298245614) internal successors, (86), 79 states have internal predecessors, (86), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-13 00:48:16,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2021-10-13 00:48:16,458 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 28 [2021-10-13 00:48:16,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:48:16,459 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2021-10-13 00:48:16,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:48:16,459 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2021-10-13 00:48:16,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:48:16,460 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:48:16,460 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:48:16,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 00:48:16,461 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_circular_createErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:48:16,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:48:16,461 INFO L82 PathProgramCache]: Analyzing trace with hash 173693976, now seen corresponding path program 1 times [2021-10-13 00:48:16,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:48:16,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54408875] [2021-10-13 00:48:16,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:16,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:48:16,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:16,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:48:16,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:16,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-13 00:48:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:16,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-13 00:48:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:48:16,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:48:16,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54408875] [2021-10-13 00:48:16,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54408875] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:48:16,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:48:16,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 00:48:16,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817766272] [2021-10-13 00:48:16,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:48:16,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:48:16,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:48:16,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:48:16,710 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:48:17,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:48:17,109 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2021-10-13 00:48:17,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:48:17,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-10-13 00:48:17,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:48:17,111 INFO L225 Difference]: With dead ends: 113 [2021-10-13 00:48:17,111 INFO L226 Difference]: Without dead ends: 113 [2021-10-13 00:48:17,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:48:17,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-13 00:48:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2021-10-13 00:48:17,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 78 states have internal predecessors, (85), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-13 00:48:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2021-10-13 00:48:17,118 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 28 [2021-10-13 00:48:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:48:17,118 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2021-10-13 00:48:17,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 00:48:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2021-10-13 00:48:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 00:48:17,120 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:48:17,120 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:48:17,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-13 00:48:17,120 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting sll_circular_createErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:48:17,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:48:17,121 INFO L82 PathProgramCache]: Analyzing trace with hash -918257581, now seen corresponding path program 1 times [2021-10-13 00:48:17,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:48:17,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77645675] [2021-10-13 00:48:17,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:17,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:48:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:17,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:48:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:17,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-13 00:48:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:17,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-13 00:48:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:17,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 00:48:17,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:48:17,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77645675] [2021-10-13 00:48:17,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77645675] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:48:17,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907047873] [2021-10-13 00:48:17,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:17,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:48:17,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:48:17,336 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:48:17,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:48:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:17,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 00:48:17,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:48:17,566 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 [2021-10-13 00:48:17,801 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 00:48:17,801 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 [2021-10-13 00:48:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:48:17,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907047873] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:48:17,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:48:17,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-10-13 00:48:17,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369695170] [2021-10-13 00:48:17,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 00:48:17,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:48:17,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:48:17,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:48:17,932 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-13 00:48:18,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:48:18,536 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2021-10-13 00:48:18,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:48:18,538 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2021-10-13 00:48:18,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:48:18,539 INFO L225 Difference]: With dead ends: 112 [2021-10-13 00:48:18,539 INFO L226 Difference]: Without dead ends: 112 [2021-10-13 00:48:18,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:48:18,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-13 00:48:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2021-10-13 00:48:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 57 states have (on average 1.4736842105263157) internal successors, (84), 77 states have internal predecessors, (84), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-13 00:48:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2021-10-13 00:48:18,544 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 31 [2021-10-13 00:48:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:48:18,544 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2021-10-13 00:48:18,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-13 00:48:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2021-10-13 00:48:18,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 00:48:18,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:48:18,546 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:48:18,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:48:18,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:48:18,746 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting sll_circular_createErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:48:18,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:48:18,747 INFO L82 PathProgramCache]: Analyzing trace with hash -918257580, now seen corresponding path program 1 times [2021-10-13 00:48:18,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:48:18,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311646368] [2021-10-13 00:48:18,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:18,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:48:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:18,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:48:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:18,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-10-13 00:48:18,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:18,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-10-13 00:48:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:18,992 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 00:48:18,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:48:18,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311646368] [2021-10-13 00:48:18,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311646368] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:48:18,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63444353] [2021-10-13 00:48:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:18,993 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:48:18,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:48:18,999 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:48:19,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 00:48:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:19,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 00:48:19,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:48:19,176 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 [2021-10-13 00:48:19,180 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 [2021-10-13 00:48:19,596 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 00:48:19,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-10-13 00:48:19,604 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:48:19,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-13 00:48:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:48:19,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63444353] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:48:19,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:48:19,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-10-13 00:48:19,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987658826] [2021-10-13 00:48:19,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 00:48:19,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:48:19,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 00:48:19,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-10-13 00:48:19,739 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 17 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-13 00:48:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:48:20,443 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-10-13 00:48:20,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:48:20,444 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 31 [2021-10-13 00:48:20,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:48:20,445 INFO L225 Difference]: With dead ends: 111 [2021-10-13 00:48:20,446 INFO L226 Difference]: Without dead ends: 111 [2021-10-13 00:48:20,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 367.2ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-10-13 00:48:20,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-13 00:48:20,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 91. [2021-10-13 00:48:20,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 57 states have (on average 1.456140350877193) internal successors, (83), 76 states have internal predecessors, (83), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-13 00:48:20,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2021-10-13 00:48:20,450 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 31 [2021-10-13 00:48:20,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:48:20,451 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2021-10-13 00:48:20,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 3 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-10-13 00:48:20,451 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2021-10-13 00:48:20,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 00:48:20,452 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:48:20,453 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:48:20,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:48:20,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:48:20,677 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:48:20,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:48:20,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1835388011, now seen corresponding path program 1 times [2021-10-13 00:48:20,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:48:20,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531473660] [2021-10-13 00:48:20,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:20,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:48:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:20,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:48:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:20,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:48:20,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:20,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:48:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:20,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:48:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 00:48:20,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:48:20,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531473660] [2021-10-13 00:48:20,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531473660] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:48:20,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:48:20,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-13 00:48:20,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604733603] [2021-10-13 00:48:20,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 00:48:20,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:48:20,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 00:48:20,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:48:20,888 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 00:48:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:48:21,621 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2021-10-13 00:48:21,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 00:48:21,622 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-10-13 00:48:21,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:48:21,623 INFO L225 Difference]: With dead ends: 119 [2021-10-13 00:48:21,624 INFO L226 Difference]: Without dead ends: 119 [2021-10-13 00:48:21,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-10-13 00:48:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-10-13 00:48:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2021-10-13 00:48:21,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 60 states have (on average 1.4833333333333334) internal successors, (89), 79 states have internal predecessors, (89), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-13 00:48:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2021-10-13 00:48:21,628 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 40 [2021-10-13 00:48:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:48:21,628 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2021-10-13 00:48:21,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 00:48:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2021-10-13 00:48:21,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 00:48:21,630 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:48:21,630 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:48:21,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-13 00:48:21,631 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_circular_update_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:48:21,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:48:21,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1835388012, now seen corresponding path program 1 times [2021-10-13 00:48:21,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:48:21,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732414308] [2021-10-13 00:48:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:21,632 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:48:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:21,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:48:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:21,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:48:21,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:21,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:48:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:21,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:48:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:48:21,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:48:21,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732414308] [2021-10-13 00:48:21,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732414308] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:48:21,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:48:21,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-13 00:48:21,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237278510] [2021-10-13 00:48:21,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 00:48:21,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:48:21,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 00:48:21,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:48:21,887 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 00:48:22,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:48:22,693 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2021-10-13 00:48:22,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 00:48:22,693 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 40 [2021-10-13 00:48:22,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:48:22,695 INFO L225 Difference]: With dead ends: 117 [2021-10-13 00:48:22,695 INFO L226 Difference]: Without dead ends: 117 [2021-10-13 00:48:22,695 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 320.0ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-10-13 00:48:22,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-13 00:48:22,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 94. [2021-10-13 00:48:22,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 60 states have (on average 1.45) internal successors, (87), 79 states have internal predecessors, (87), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-13 00:48:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2021-10-13 00:48:22,700 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 40 [2021-10-13 00:48:22,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:48:22,700 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2021-10-13 00:48:22,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 00:48:22,700 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2021-10-13 00:48:22,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-13 00:48:22,701 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:48:22,702 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:48:22,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-13 00:48:22,702 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_circular_destroyErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:48:22,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:48:22,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1224058359, now seen corresponding path program 1 times [2021-10-13 00:48:22,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:48:22,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232868571] [2021-10-13 00:48:22,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:22,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:48:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:22,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:48:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:22,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:48:22,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:22,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:48:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:22,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:48:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 00:48:22,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:48:22,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232868571] [2021-10-13 00:48:22,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232868571] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:48:22,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:48:22,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-13 00:48:22,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311174257] [2021-10-13 00:48:22,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:48:22,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:48:22,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:48:22,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:48:22,829 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-13 00:48:23,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:48:23,093 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2021-10-13 00:48:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:48:23,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2021-10-13 00:48:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:48:23,098 INFO L225 Difference]: With dead ends: 123 [2021-10-13 00:48:23,099 INFO L226 Difference]: Without dead ends: 123 [2021-10-13 00:48:23,099 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:48:23,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-13 00:48:23,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 96. [2021-10-13 00:48:23,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 62 states have (on average 1.435483870967742) internal successors, (89), 81 states have internal predecessors, (89), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-13 00:48:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2021-10-13 00:48:23,104 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 42 [2021-10-13 00:48:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:48:23,106 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2021-10-13 00:48:23,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-10-13 00:48:23,106 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2021-10-13 00:48:23,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-13 00:48:23,110 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:48:23,110 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:48:23,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-13 00:48:23,110 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:48:23,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:48:23,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1182712765, now seen corresponding path program 1 times [2021-10-13 00:48:23,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:48:23,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321119698] [2021-10-13 00:48:23,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:23,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:48:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:23,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:48:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:23,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:48:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:23,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:48:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:23,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:48:23,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 00:48:23,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:48:23,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321119698] [2021-10-13 00:48:23,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321119698] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:48:23,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:48:23,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 00:48:23,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989224778] [2021-10-13 00:48:23,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:48:23,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:48:23,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:48:23,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:48:23,248 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 00:48:23,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:48:23,622 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2021-10-13 00:48:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:48:23,624 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-10-13 00:48:23,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:48:23,625 INFO L225 Difference]: With dead ends: 128 [2021-10-13 00:48:23,625 INFO L226 Difference]: Without dead ends: 128 [2021-10-13 00:48:23,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:48:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-13 00:48:23,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2021-10-13 00:48:23,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 86 states have internal predecessors, (93), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-13 00:48:23,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2021-10-13 00:48:23,628 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 43 [2021-10-13 00:48:23,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:48:23,628 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2021-10-13 00:48:23,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 00:48:23,629 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2021-10-13 00:48:23,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-13 00:48:23,629 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:48:23,629 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:48:23,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-13 00:48:23,630 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:48:23,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:48:23,630 INFO L82 PathProgramCache]: Analyzing trace with hash 27146876, now seen corresponding path program 1 times [2021-10-13 00:48:23,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:48:23,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869281232] [2021-10-13 00:48:23,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:23,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:48:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:23,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:48:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:23,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:48:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:23,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:48:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:23,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:48:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:23,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:48:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:48:23,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:48:23,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869281232] [2021-10-13 00:48:23,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869281232] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:48:23,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:48:23,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-13 00:48:23,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046800646] [2021-10-13 00:48:23,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 00:48:23,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:48:23,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 00:48:23,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:48:23,858 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:48:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:48:24,518 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2021-10-13 00:48:24,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 00:48:24,519 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2021-10-13 00:48:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:48:24,520 INFO L225 Difference]: With dead ends: 130 [2021-10-13 00:48:24,520 INFO L226 Difference]: Without dead ends: 130 [2021-10-13 00:48:24,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 222.9ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-10-13 00:48:24,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-10-13 00:48:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2021-10-13 00:48:24,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 69 states have (on average 1.434782608695652) internal successors, (99), 89 states have internal predecessors, (99), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-10-13 00:48:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2021-10-13 00:48:24,524 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 50 [2021-10-13 00:48:24,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:48:24,525 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2021-10-13 00:48:24,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:48:24,525 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2021-10-13 00:48:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-13 00:48:24,526 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:48:24,526 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:48:24,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 00:48:24,526 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_circular_get_data_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:48:24,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:48:24,527 INFO L82 PathProgramCache]: Analyzing trace with hash 27146877, now seen corresponding path program 1 times [2021-10-13 00:48:24,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:48:24,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575102982] [2021-10-13 00:48:24,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:24,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:48:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:24,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:48:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:24,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:48:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:24,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:48:24,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:24,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:48:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:24,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:48:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 00:48:24,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:48:24,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575102982] [2021-10-13 00:48:24,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575102982] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:48:24,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636650881] [2021-10-13 00:48:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:24,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:48:24,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:48:24,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:48:24,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 00:48:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:24,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:48:24,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:48:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 00:48:25,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636650881] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:48:25,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:48:25,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-10-13 00:48:25,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186504868] [2021-10-13 00:48:25,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:48:25,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:48:25,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:48:25,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:48:25,034 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-13 00:48:25,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:48:25,344 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2021-10-13 00:48:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:48:25,345 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 50 [2021-10-13 00:48:25,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:48:25,346 INFO L225 Difference]: With dead ends: 133 [2021-10-13 00:48:25,347 INFO L226 Difference]: Without dead ends: 133 [2021-10-13 00:48:25,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:48:25,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-13 00:48:25,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 112. [2021-10-13 00:48:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 75 states have (on average 1.4133333333333333) internal successors, (106), 94 states have internal predecessors, (106), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:48:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2021-10-13 00:48:25,352 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 50 [2021-10-13 00:48:25,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:48:25,353 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2021-10-13 00:48:25,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 8 states have internal predecessors, (41), 6 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-13 00:48:25,353 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2021-10-13 00:48:25,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 00:48:25,354 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:48:25,354 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:48:25,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:48:25,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:48:25,579 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:48:25,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:48:25,579 INFO L82 PathProgramCache]: Analyzing trace with hash 310228175, now seen corresponding path program 1 times [2021-10-13 00:48:25,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:48:25,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558578032] [2021-10-13 00:48:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:25,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:48:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:25,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:48:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:25,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:48:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:25,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:48:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:25,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:48:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:26,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:48:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:48:26,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:48:26,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558578032] [2021-10-13 00:48:26,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558578032] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:48:26,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388610815] [2021-10-13 00:48:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:26,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:48:26,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:48:26,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:48:26,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 00:48:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:26,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-13 00:48:26,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:48:26,446 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 [2021-10-13 00:48:26,650 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:48:26,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:48:26,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:48:26,792 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:48:26,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-13 00:48:27,117 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:48:27,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-10-13 00:48:41,063 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-10-13 00:48:41,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 39 [2021-10-13 00:48:41,678 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-13 00:48:41,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 28 [2021-10-13 00:48:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:48:41,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388610815] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:48:41,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:48:41,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2021-10-13 00:48:41,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893741822] [2021-10-13 00:48:41,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-13 00:48:41,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:48:41,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-13 00:48:41,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1302, Unknown=17, NotChecked=0, Total=1406 [2021-10-13 00:48:41,697 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand has 38 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 27 states have internal predecessors, (61), 6 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-13 00:48:48,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:48:48,512 INFO L93 Difference]: Finished difference Result 209 states and 237 transitions. [2021-10-13 00:48:48,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 00:48:48,513 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 27 states have internal predecessors, (61), 6 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 51 [2021-10-13 00:48:48,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:48:48,515 INFO L225 Difference]: With dead ends: 209 [2021-10-13 00:48:48,515 INFO L226 Difference]: Without dead ends: 209 [2021-10-13 00:48:48,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 19642.6ms TimeCoverageRelationStatistics Valid=321, Invalid=3202, Unknown=17, NotChecked=0, Total=3540 [2021-10-13 00:48:48,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-10-13 00:48:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 146. [2021-10-13 00:48:48,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 102 states have (on average 1.3627450980392157) internal successors, (139), 122 states have internal predecessors, (139), 13 states have call successors, (13), 10 states have call predecessors, (13), 11 states have return successors, (15), 13 states have call predecessors, (15), 12 states have call successors, (15) [2021-10-13 00:48:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 167 transitions. [2021-10-13 00:48:48,525 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 167 transitions. Word has length 51 [2021-10-13 00:48:48,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:48:48,525 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 167 transitions. [2021-10-13 00:48:48,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 27 states have internal predecessors, (61), 6 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-13 00:48:48,526 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 167 transitions. [2021-10-13 00:48:48,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 00:48:48,527 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:48:48,527 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:48:48,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:48:48,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-13 00:48:48,749 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_circular_update_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:48:48,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:48:48,749 INFO L82 PathProgramCache]: Analyzing trace with hash 310228176, now seen corresponding path program 1 times [2021-10-13 00:48:48,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:48:48,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161091584] [2021-10-13 00:48:48,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:48,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:48:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:48,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:48:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:48,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:48:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:49,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:48:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:49,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:48:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:49,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:48:49,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 00:48:49,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:48:49,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161091584] [2021-10-13 00:48:49,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161091584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:48:49,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552401670] [2021-10-13 00:48:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:48:49,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:48:49,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:48:49,708 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:48:49,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 00:48:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:48:49,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-13 00:48:49,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:48:49,999 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 [2021-10-13 00:48:50,005 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 [2021-10-13 00:48:50,455 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:48:50,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:48:50,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-10-13 00:48:50,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:48:50,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:48:50,801 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:48:50,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-13 00:48:50,812 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 00:48:50,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-13 00:48:51,276 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:48:51,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 35 [2021-10-13 00:48:51,286 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:48:51,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2021-10-13 00:48:55,468 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 00:48:55,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 66 [2021-10-13 00:48:55,489 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-13 00:48:55,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 56 [2021-10-13 00:48:55,934 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:48:55,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 45 [2021-10-13 00:48:55,942 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:48:55,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 24 [2021-10-13 00:48:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 00:48:56,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552401670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:48:56,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:48:56,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 48 [2021-10-13 00:48:56,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20043366] [2021-10-13 00:48:56,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-13 00:48:56,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:48:56,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-13 00:48:56,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2217, Unknown=2, NotChecked=0, Total=2352 [2021-10-13 00:48:56,123 INFO L87 Difference]: Start difference. First operand 146 states and 167 transitions. Second operand has 49 states, 48 states have (on average 1.5625) internal successors, (75), 36 states have internal predecessors, (75), 6 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-13 00:49:27,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:49:27,237 INFO L93 Difference]: Finished difference Result 302 states and 343 transitions. [2021-10-13 00:49:27,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 00:49:27,238 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.5625) internal successors, (75), 36 states have internal predecessors, (75), 6 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) Word has length 51 [2021-10-13 00:49:27,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:49:27,240 INFO L225 Difference]: With dead ends: 302 [2021-10-13 00:49:27,241 INFO L226 Difference]: Without dead ends: 302 [2021-10-13 00:49:27,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 18061.3ms TimeCoverageRelationStatistics Valid=467, Invalid=5366, Unknown=19, NotChecked=0, Total=5852 [2021-10-13 00:49:27,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-10-13 00:49:27,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 160. [2021-10-13 00:49:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 113 states have (on average 1.3539823008849559) internal successors, (153), 134 states have internal predecessors, (153), 14 states have call successors, (14), 11 states have call predecessors, (14), 13 states have return successors, (18), 14 states have call predecessors, (18), 13 states have call successors, (18) [2021-10-13 00:49:27,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 185 transitions. [2021-10-13 00:49:27,267 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 185 transitions. Word has length 51 [2021-10-13 00:49:27,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:49:27,267 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 185 transitions. [2021-10-13 00:49:27,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.5625) internal successors, (75), 36 states have internal predecessors, (75), 6 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-13 00:49:27,268 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 185 transitions. [2021-10-13 00:49:27,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-13 00:49:27,269 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:49:27,270 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:49:27,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:49:27,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-13 00:49:27,495 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:49:27,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:49:27,495 INFO L82 PathProgramCache]: Analyzing trace with hash -760362657, now seen corresponding path program 2 times [2021-10-13 00:49:27,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:49:27,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008066817] [2021-10-13 00:49:27,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:49:27,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:49:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:27,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:49:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:27,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:49:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:27,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:49:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:27,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:49:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:27,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:49:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 00:49:27,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:49:27,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008066817] [2021-10-13 00:49:27,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008066817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:49:27,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644683376] [2021-10-13 00:49:27,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:49:27,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:49:27,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:49:27,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:49:27,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 00:49:28,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:49:28,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:49:28,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:49:28,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:49:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:49:28,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644683376] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:49:28,195 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:49:28,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-10-13 00:49:28,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152110461] [2021-10-13 00:49:28,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:49:28,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:49:28,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:49:28,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:49:28,197 INFO L87 Difference]: Start difference. First operand 160 states and 185 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-13 00:49:28,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:49:28,646 INFO L93 Difference]: Finished difference Result 177 states and 196 transitions. [2021-10-13 00:49:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 00:49:28,647 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2021-10-13 00:49:28,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:49:28,648 INFO L225 Difference]: With dead ends: 177 [2021-10-13 00:49:28,648 INFO L226 Difference]: Without dead ends: 177 [2021-10-13 00:49:28,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 204.5ms TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:49:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-10-13 00:49:28,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 154. [2021-10-13 00:49:28,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 110 states have (on average 1.309090909090909) internal successors, (144), 128 states have internal predecessors, (144), 14 states have call successors, (14), 11 states have call predecessors, (14), 12 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15) [2021-10-13 00:49:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 173 transitions. [2021-10-13 00:49:28,658 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 173 transitions. Word has length 54 [2021-10-13 00:49:28,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:49:28,658 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 173 transitions. [2021-10-13 00:49:28,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 7 states have internal predecessors, (45), 4 states have call successors, (12), 5 states have call predecessors, (12), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-13 00:49:28,659 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 173 transitions. [2021-10-13 00:49:28,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-13 00:49:28,659 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:49:28,660 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:49:28,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-13 00:49:28,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-13 00:49:28,871 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting sll_circular_get_data_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:49:28,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:49:28,872 INFO L82 PathProgramCache]: Analyzing trace with hash 827280497, now seen corresponding path program 2 times [2021-10-13 00:49:28,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:49:28,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202313378] [2021-10-13 00:49:28,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:49:28,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:49:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:28,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:49:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:28,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:49:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:28,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:49:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:28,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:49:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:28,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:49:28,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:28,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:49:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:49:29,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:49:29,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202313378] [2021-10-13 00:49:29,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202313378] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:49:29,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537742771] [2021-10-13 00:49:29,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:49:29,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:49:29,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:49:29,010 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:49:29,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 00:49:29,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 00:49:29,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:49:29,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-13 00:49:29,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:49:29,353 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 [2021-10-13 00:49:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-13 00:49:29,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537742771] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:49:29,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:49:29,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 20 [2021-10-13 00:49:29,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474511106] [2021-10-13 00:49:29,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 00:49:29,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:49:29,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:49:29,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:49:29,803 INFO L87 Difference]: Start difference. First operand 154 states and 173 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:49:30,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:49:30,093 INFO L93 Difference]: Finished difference Result 159 states and 177 transitions. [2021-10-13 00:49:30,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 00:49:30,093 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2021-10-13 00:49:30,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:49:30,094 INFO L225 Difference]: With dead ends: 159 [2021-10-13 00:49:30,094 INFO L226 Difference]: Without dead ends: 159 [2021-10-13 00:49:30,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:49:30,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-10-13 00:49:30,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 154. [2021-10-13 00:49:30,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 110 states have (on average 1.290909090909091) internal successors, (142), 128 states have internal predecessors, (142), 14 states have call successors, (14), 11 states have call predecessors, (14), 12 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15) [2021-10-13 00:49:30,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 171 transitions. [2021-10-13 00:49:30,114 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 171 transitions. Word has length 58 [2021-10-13 00:49:30,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:49:30,115 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 171 transitions. [2021-10-13 00:49:30,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-13 00:49:30,115 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 171 transitions. [2021-10-13 00:49:30,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-13 00:49:30,117 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:49:30,118 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:49:30,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:49:30,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-13 00:49:30,327 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:49:30,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:49:30,327 INFO L82 PathProgramCache]: Analyzing trace with hash 992697175, now seen corresponding path program 1 times [2021-10-13 00:49:30,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:49:30,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419574809] [2021-10-13 00:49:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:49:30,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:49:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:30,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:49:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:30,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:49:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:30,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:49:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:30,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:49:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:30,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:49:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:30,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:49:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-13 00:49:30,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:49:30,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419574809] [2021-10-13 00:49:30,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419574809] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:49:30,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:49:30,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-13 00:49:30,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362098879] [2021-10-13 00:49:30,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:49:30,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:49:30,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:49:30,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:49:30,457 INFO L87 Difference]: Start difference. First operand 154 states and 171 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-10-13 00:49:30,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:49:30,773 INFO L93 Difference]: Finished difference Result 181 states and 197 transitions. [2021-10-13 00:49:30,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:49:30,774 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 61 [2021-10-13 00:49:30,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:49:30,775 INFO L225 Difference]: With dead ends: 181 [2021-10-13 00:49:30,775 INFO L226 Difference]: Without dead ends: 181 [2021-10-13 00:49:30,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:49:30,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-10-13 00:49:30,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 160. [2021-10-13 00:49:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 115 states have (on average 1.2782608695652173) internal successors, (147), 133 states have internal predecessors, (147), 14 states have call successors, (14), 12 states have call predecessors, (14), 13 states have return successors, (15), 14 states have call predecessors, (15), 13 states have call successors, (15) [2021-10-13 00:49:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2021-10-13 00:49:30,782 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 61 [2021-10-13 00:49:30,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:49:30,783 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2021-10-13 00:49:30,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-10-13 00:49:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2021-10-13 00:49:30,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-13 00:49:30,784 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:49:30,784 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:49:30,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-13 00:49:30,785 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:49:30,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:49:30,785 INFO L82 PathProgramCache]: Analyzing trace with hash 675898859, now seen corresponding path program 3 times [2021-10-13 00:49:30,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:49:30,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376800104] [2021-10-13 00:49:30,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:49:30,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:49:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:30,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:49:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:30,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:49:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:30,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:49:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:30,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:49:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:30,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:49:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:30,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:49:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 00:49:30,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:49:30,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376800104] [2021-10-13 00:49:30,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376800104] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:49:30,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923819572] [2021-10-13 00:49:30,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:49:30,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:49:30,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:49:30,935 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:49:30,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 00:49:31,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 00:49:31,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:49:31,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:49:31,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:49:31,574 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 00:49:31,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923819572] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:49:31,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:49:31,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2021-10-13 00:49:31,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103327801] [2021-10-13 00:49:31,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 00:49:31,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:49:31,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 00:49:31,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:49:31,576 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 10 states have internal predecessors, (55), 6 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-13 00:49:32,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:49:32,119 INFO L93 Difference]: Finished difference Result 171 states and 181 transitions. [2021-10-13 00:49:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 00:49:32,119 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 10 states have internal predecessors, (55), 6 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 62 [2021-10-13 00:49:32,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:49:32,121 INFO L225 Difference]: With dead ends: 171 [2021-10-13 00:49:32,121 INFO L226 Difference]: Without dead ends: 171 [2021-10-13 00:49:32,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 215.8ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-10-13 00:49:32,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-13 00:49:32,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 143. [2021-10-13 00:49:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 101 states have (on average 1.2574257425742574) internal successors, (127), 119 states have internal predecessors, (127), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2021-10-13 00:49:32,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 153 transitions. [2021-10-13 00:49:32,143 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 153 transitions. Word has length 62 [2021-10-13 00:49:32,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:49:32,143 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 153 transitions. [2021-10-13 00:49:32,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 10 states have internal predecessors, (55), 6 states have call successors, (13), 5 states have call predecessors, (13), 2 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2021-10-13 00:49:32,144 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 153 transitions. [2021-10-13 00:49:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-13 00:49:32,145 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:49:32,145 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:49:32,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:49:32,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:49:32,351 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting sll_circular_update_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:49:32,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:49:32,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2095820899, now seen corresponding path program 4 times [2021-10-13 00:49:32,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:49:32,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877900445] [2021-10-13 00:49:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:49:32,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:49:32,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:32,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:49:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:32,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:49:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:32,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:49:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:32,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:49:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:32,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-10-13 00:49:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:32,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-13 00:49:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-13 00:49:32,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:49:32,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877900445] [2021-10-13 00:49:32,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877900445] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:49:32,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515123304] [2021-10-13 00:49:32,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:49:32,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:49:32,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:49:32,495 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:49:32,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 00:49:32,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:49:32,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:49:32,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 00:49:32,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:49:33,167 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 00:49:33,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515123304] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:49:33,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:49:33,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2021-10-13 00:49:33,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206664205] [2021-10-13 00:49:33,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:49:33,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:49:33,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:49:33,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:49:33,170 INFO L87 Difference]: Start difference. First operand 143 states and 153 transitions. Second operand has 11 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 7 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2021-10-13 00:49:33,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:49:33,557 INFO L93 Difference]: Finished difference Result 140 states and 149 transitions. [2021-10-13 00:49:33,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:49:33,557 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 7 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 63 [2021-10-13 00:49:33,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:49:33,558 INFO L225 Difference]: With dead ends: 140 [2021-10-13 00:49:33,558 INFO L226 Difference]: Without dead ends: 131 [2021-10-13 00:49:33,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:49:33,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-13 00:49:33,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 112. [2021-10-13 00:49:33,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 78 states have (on average 1.2692307692307692) internal successors, (99), 93 states have internal predecessors, (99), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:49:33,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2021-10-13 00:49:33,564 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 63 [2021-10-13 00:49:33,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:49:33,564 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2021-10-13 00:49:33,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 7 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2021-10-13 00:49:33,565 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2021-10-13 00:49:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-13 00:49:33,565 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:49:33,565 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:49:33,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 00:49:33,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:49:33,766 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:49:33,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:49:33,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1237454384, now seen corresponding path program 1 times [2021-10-13 00:49:33,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:49:33,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696984469] [2021-10-13 00:49:33,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:49:33,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:49:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:33,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:49:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:33,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:49:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:33,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:49:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:33,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:49:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:33,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:49:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:33,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:49:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:33,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-10-13 00:49:33,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:49:33,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:49:33,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696984469] [2021-10-13 00:49:33,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696984469] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:49:33,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671099164] [2021-10-13 00:49:33,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:49:33,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:49:33,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:49:33,932 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:49:33,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 00:49:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:34,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 00:49:34,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:49:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 00:49:34,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671099164] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:49:34,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:49:34,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-10-13 00:49:34,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997290261] [2021-10-13 00:49:34,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:49:34,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:49:34,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:49:34,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:49:34,603 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-13 00:49:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:49:34,656 INFO L93 Difference]: Finished difference Result 117 states and 121 transitions. [2021-10-13 00:49:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:49:34,656 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 64 [2021-10-13 00:49:34,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:49:34,658 INFO L225 Difference]: With dead ends: 117 [2021-10-13 00:49:34,658 INFO L226 Difference]: Without dead ends: 114 [2021-10-13 00:49:34,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:49:34,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-13 00:49:34,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2021-10-13 00:49:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 93 states have internal predecessors, (98), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:49:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 117 transitions. [2021-10-13 00:49:34,663 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 117 transitions. Word has length 64 [2021-10-13 00:49:34,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:49:34,663 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 117 transitions. [2021-10-13 00:49:34,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 6 states have internal predecessors, (43), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-10-13 00:49:34,664 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 117 transitions. [2021-10-13 00:49:34,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-13 00:49:34,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:49:34,664 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:49:34,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-10-13 00:49:34,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:49:34,879 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:49:34,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:49:34,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1206656096, now seen corresponding path program 1 times [2021-10-13 00:49:34,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:49:34,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834053760] [2021-10-13 00:49:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:49:34,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:49:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:35,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:49:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:35,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:49:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:35,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:49:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:35,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:49:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:35,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:49:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:35,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:49:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:35,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-13 00:49:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:35,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 00:49:35,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:49:35,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834053760] [2021-10-13 00:49:35,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834053760] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:49:35,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833784540] [2021-10-13 00:49:35,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:49:35,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:49:35,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:49:35,971 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:49:35,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 00:49:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:36,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 103 conjunts are in the unsatisfiable core [2021-10-13 00:49:36,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:49:36,400 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 [2021-10-13 00:49:36,574 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:49:36,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:49:36,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:49:36,820 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:49:36,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-10-13 00:49:37,347 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 [2021-10-13 00:49:37,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 00:49:37,445 INFO L354 Elim1Store]: treesize reduction 47, result has 13.0 percent of original size [2021-10-13 00:49:37,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 25 [2021-10-13 00:49:38,734 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int) (sll_circular_update_at_~data Int)) (= |c_#memory_int| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_int)| .cse0 (store (select |c_old(#memory_int)| .cse0) (+ sll_circular_update_at_~head.offset 4) sll_circular_update_at_~data))))) is different from true [2021-10-13 00:49:38,762 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:49:38,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 33 [2021-10-13 00:49:38,779 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-13 00:49:38,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2021-10-13 00:49:39,437 INFO L354 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2021-10-13 00:49:39,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2021-10-13 00:49:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-10-13 00:49:39,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833784540] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:49:39,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:49:39,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 63 [2021-10-13 00:49:39,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526788288] [2021-10-13 00:49:39,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-10-13 00:49:39,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:49:39,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-10-13 00:49:39,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3593, Unknown=1, NotChecked=120, Total=3906 [2021-10-13 00:49:39,492 INFO L87 Difference]: Start difference. First operand 112 states and 117 transitions. Second operand has 63 states, 58 states have (on average 1.603448275862069) internal successors, (93), 50 states have internal predecessors, (93), 10 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2021-10-13 00:49:49,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:49:49,784 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2021-10-13 00:49:49,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 00:49:49,787 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 58 states have (on average 1.603448275862069) internal successors, (93), 50 states have internal predecessors, (93), 10 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) Word has length 67 [2021-10-13 00:49:49,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:49:49,788 INFO L225 Difference]: With dead ends: 135 [2021-10-13 00:49:49,788 INFO L226 Difference]: Without dead ends: 135 [2021-10-13 00:49:49,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 11256.2ms TimeCoverageRelationStatistics Valid=477, Invalid=7172, Unknown=11, NotChecked=172, Total=7832 [2021-10-13 00:49:49,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-10-13 00:49:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2021-10-13 00:49:49,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 93 states have internal predecessors, (97), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:49:49,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-10-13 00:49:49,796 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 67 [2021-10-13 00:49:49,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:49:49,796 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-10-13 00:49:49,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 58 states have (on average 1.603448275862069) internal successors, (93), 50 states have internal predecessors, (93), 10 states have call successors, (15), 8 states have call predecessors, (15), 11 states have return successors, (12), 12 states have call predecessors, (12), 10 states have call successors, (12) [2021-10-13 00:49:49,797 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-10-13 00:49:49,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-13 00:49:49,798 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:49:49,798 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:49:49,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 00:49:50,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-13 00:49:50,011 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:49:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:49:50,011 INFO L82 PathProgramCache]: Analyzing trace with hash -2112045542, now seen corresponding path program 1 times [2021-10-13 00:49:50,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:49:50,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876668399] [2021-10-13 00:49:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:49:50,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:49:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:50,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:49:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:50,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:49:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:50,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:49:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:50,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:49:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:50,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:49:50,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:50,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:49:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:50,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-13 00:49:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 00:49:50,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:49:50,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876668399] [2021-10-13 00:49:50,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876668399] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:49:50,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107208397] [2021-10-13 00:49:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:49:50,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:49:50,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:49:50,851 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:49:50,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 00:49:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:49:51,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 76 conjunts are in the unsatisfiable core [2021-10-13 00:49:51,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:49:51,518 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 [2021-10-13 00:49:51,658 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:49:51,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:49:51,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:49:51,839 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:49:51,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-13 00:49:52,143 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:49:52,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-10-13 00:50:08,983 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 00:50:08,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 33 [2021-10-13 00:50:09,088 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:50:09,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-10-13 00:50:35,228 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-10-13 00:50:35,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 51 [2021-10-13 00:50:39,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 00:50:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 00:50:39,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107208397] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:50:39,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:50:39,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 50 [2021-10-13 00:50:39,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427720403] [2021-10-13 00:50:39,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-13 00:50:39,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:50:39,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-13 00:50:39,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2356, Unknown=40, NotChecked=0, Total=2550 [2021-10-13 00:50:39,251 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand has 51 states, 50 states have (on average 2.06) internal successors, (103), 39 states have internal predecessors, (103), 6 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-13 00:52:21,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:52:21,158 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2021-10-13 00:52:21,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 00:52:21,159 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.06) internal successors, (103), 39 states have internal predecessors, (103), 6 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) Word has length 75 [2021-10-13 00:52:21,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:52:21,160 INFO L225 Difference]: With dead ends: 144 [2021-10-13 00:52:21,160 INFO L226 Difference]: Without dead ends: 144 [2021-10-13 00:52:21,162 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 63227.2ms TimeCoverageRelationStatistics Valid=470, Invalid=5032, Unknown=48, NotChecked=0, Total=5550 [2021-10-13 00:52:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-13 00:52:21,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 116. [2021-10-13 00:52:21,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 97 states have internal predecessors, (104), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:52:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2021-10-13 00:52:21,167 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 75 [2021-10-13 00:52:21,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:52:21,168 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2021-10-13 00:52:21,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.06) internal successors, (103), 39 states have internal predecessors, (103), 6 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2021-10-13 00:52:21,168 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2021-10-13 00:52:21,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-13 00:52:21,169 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:52:21,169 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:52:21,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-10-13 00:52:21,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-13 00:52:21,374 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting sll_circular_get_data_atErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:52:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:52:21,374 INFO L82 PathProgramCache]: Analyzing trace with hash -2112045541, now seen corresponding path program 1 times [2021-10-13 00:52:21,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:52:21,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439937245] [2021-10-13 00:52:21,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:21,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:52:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:21,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:52:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:21,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:52:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:21,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:52:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:22,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:52:22,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:22,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:52:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:22,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:52:22,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:22,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-13 00:52:22,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 00:52:22,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:52:22,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439937245] [2021-10-13 00:52:22,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439937245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:22,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784351887] [2021-10-13 00:52:22,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:52:22,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:52:22,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:52:22,548 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:52:22,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 00:52:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:52:23,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 98 conjunts are in the unsatisfiable core [2021-10-13 00:52:23,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:52:23,096 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 [2021-10-13 00:52:23,099 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 [2021-10-13 00:52:23,581 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 00:52:23,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-13 00:52:23,592 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:52:23,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:52:23,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:52:23,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:52:23,918 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:52:23,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 45 [2021-10-13 00:52:23,932 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 00:52:23,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-13 00:52:24,378 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:52:24,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 35 [2021-10-13 00:52:24,385 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:52:24,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:52:28,593 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 00:52:28,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 66 [2021-10-13 00:52:28,611 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-13 00:52:28,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 56 [2021-10-13 00:52:28,795 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:52:28,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 35 [2021-10-13 00:52:28,802 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:52:28,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2021-10-13 00:52:39,952 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-10-13 00:52:39,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 84 [2021-10-13 00:52:39,978 INFO L354 Elim1Store]: treesize reduction 90, result has 21.7 percent of original size [2021-10-13 00:52:39,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 65 [2021-10-13 00:52:40,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-10-13 00:52:40,711 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 [2021-10-13 00:52:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 00:52:40,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784351887] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:52:40,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:52:40,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 59 [2021-10-13 00:52:40,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108252414] [2021-10-13 00:52:40,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-10-13 00:52:40,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:52:40,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-10-13 00:52:40,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3342, Unknown=7, NotChecked=0, Total=3540 [2021-10-13 00:52:40,869 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 47 states have internal predecessors, (113), 8 states have call successors, (16), 9 states have call predecessors, (16), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-10-13 00:53:08,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:53:08,324 INFO L93 Difference]: Finished difference Result 142 states and 148 transitions. [2021-10-13 00:53:08,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 00:53:08,325 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 47 states have internal predecessors, (113), 8 states have call successors, (16), 9 states have call predecessors, (16), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) Word has length 75 [2021-10-13 00:53:08,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:53:08,326 INFO L225 Difference]: With dead ends: 142 [2021-10-13 00:53:08,327 INFO L226 Difference]: Without dead ends: 142 [2021-10-13 00:53:08,330 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 21648.4ms TimeCoverageRelationStatistics Valid=486, Invalid=6479, Unknown=7, NotChecked=0, Total=6972 [2021-10-13 00:53:08,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-13 00:53:08,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 115. [2021-10-13 00:53:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 96 states have internal predecessors, (101), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:53:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2021-10-13 00:53:08,335 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 75 [2021-10-13 00:53:08,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:53:08,336 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2021-10-13 00:53:08,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.9152542372881356) internal successors, (113), 47 states have internal predecessors, (113), 8 states have call successors, (16), 9 states have call predecessors, (16), 12 states have return successors, (13), 11 states have call predecessors, (13), 8 states have call successors, (13) [2021-10-13 00:53:08,336 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2021-10-13 00:53:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-13 00:53:08,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:53:08,338 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:53:08,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 00:53:08,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-13 00:53:08,555 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:53:08,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:53:08,555 INFO L82 PathProgramCache]: Analyzing trace with hash -32108403, now seen corresponding path program 1 times [2021-10-13 00:53:08,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:53:08,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413123773] [2021-10-13 00:53:08,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:53:08,556 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:53:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:08,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:53:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:08,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:53:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:08,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:53:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:08,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:53:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:08,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:53:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:08,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:53:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:08,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-13 00:53:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:08,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-13 00:53:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 00:53:08,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:53:08,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413123773] [2021-10-13 00:53:08,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413123773] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:53:08,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727626994] [2021-10-13 00:53:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:53:08,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:53:08,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:53:08,696 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:53:08,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 00:53:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:09,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 00:53:09,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:53:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 00:53:09,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727626994] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:53:09,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:53:09,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2021-10-13 00:53:09,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612530807] [2021-10-13 00:53:09,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:53:09,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:53:09,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:53:09,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:53:09,506 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-13 00:53:09,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:53:09,575 INFO L93 Difference]: Finished difference Result 119 states and 123 transitions. [2021-10-13 00:53:09,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:53:09,576 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 78 [2021-10-13 00:53:09,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:53:09,577 INFO L225 Difference]: With dead ends: 119 [2021-10-13 00:53:09,577 INFO L226 Difference]: Without dead ends: 115 [2021-10-13 00:53:09,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:53:09,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-13 00:53:09,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-10-13 00:53:09,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 96 states have internal predecessors, (100), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:53:09,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2021-10-13 00:53:09,583 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 78 [2021-10-13 00:53:09,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:53:09,583 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2021-10-13 00:53:09,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-10-13 00:53:09,583 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2021-10-13 00:53:09,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-13 00:53:09,584 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:53:09,585 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:53:09,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 00:53:09,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-13 00:53:09,785 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting sll_circular_get_data_atErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:53:09,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:53:09,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1323929965, now seen corresponding path program 2 times [2021-10-13 00:53:09,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:53:09,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066578569] [2021-10-13 00:53:09,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:53:09,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:53:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:09,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:53:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:09,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:53:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:09,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:53:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:09,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:53:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:09,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:53:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:09,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:53:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:09,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-13 00:53:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-13 00:53:09,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:53:09,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066578569] [2021-10-13 00:53:09,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066578569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:53:09,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092645176] [2021-10-13 00:53:09,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:53:09,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:53:09,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:53:09,943 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:53:09,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 00:53:10,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:53:10,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:53:10,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:53:10,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:53:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 00:53:10,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092645176] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:53:10,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:53:10,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-10-13 00:53:10,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469732442] [2021-10-13 00:53:10,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:53:10,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:53:10,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:53:10,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:53:10,841 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-13 00:53:11,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:53:11,232 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2021-10-13 00:53:11,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 00:53:11,232 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 78 [2021-10-13 00:53:11,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:53:11,233 INFO L225 Difference]: With dead ends: 125 [2021-10-13 00:53:11,234 INFO L226 Difference]: Without dead ends: 125 [2021-10-13 00:53:11,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:53:11,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-10-13 00:53:11,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 106. [2021-10-13 00:53:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 87 states have internal predecessors, (89), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:53:11,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-10-13 00:53:11,281 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 78 [2021-10-13 00:53:11,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:53:11,284 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-10-13 00:53:11,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 7 states have internal predecessors, (65), 4 states have call successors, (14), 5 states have call predecessors, (14), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-10-13 00:53:11,284 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-10-13 00:53:11,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-13 00:53:11,286 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:53:11,286 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:53:11,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 00:53:11,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:53:11,499 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:53:11,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:53:11,500 INFO L82 PathProgramCache]: Analyzing trace with hash -841344934, now seen corresponding path program 1 times [2021-10-13 00:53:11,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:53:11,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045081840] [2021-10-13 00:53:11,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:53:11,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:53:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:11,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:53:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:11,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:53:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:12,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:53:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:12,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:53:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:12,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:53:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:12,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:53:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:12,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-13 00:53:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:12,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-13 00:53:12,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 00:53:13,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:53:13,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045081840] [2021-10-13 00:53:13,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045081840] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:53:13,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136644110] [2021-10-13 00:53:13,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:53:13,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:53:13,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:53:13,044 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:53:13,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 00:53:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:53:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 108 conjunts are in the unsatisfiable core [2021-10-13 00:53:13,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:53:13,721 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 [2021-10-13 00:53:14,027 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:53:14,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:53:14,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:53:14,239 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:53:14,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2021-10-13 00:53:15,478 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base| (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_sll_circular_update_at_#in~head.base|) .cse0))))) (<= |c_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset))) is different from true [2021-10-13 00:53:15,518 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 00:53:15,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 28 [2021-10-13 00:53:15,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-10-13 00:53:16,019 INFO L354 Elim1Store]: treesize reduction 86, result has 22.5 percent of original size [2021-10-13 00:53:16,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 100 [2021-10-13 00:53:16,029 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-10-13 00:53:16,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 74 [2021-10-13 00:53:18,199 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~s~0.base_BEFORE_CALL_21 Int) (v_main_~s~0.offset_BEFORE_CALL_21 Int)) (not (= v_main_~s~0.base_BEFORE_CALL_21 (select (select |c_#memory_$Pointer$.base| v_main_~s~0.base_BEFORE_CALL_21) v_main_~s~0.offset_BEFORE_CALL_21)))) is different from true [2021-10-13 00:53:20,504 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~s~0.base_BEFORE_CALL_22 Int) (v_main_~s~0.offset_BEFORE_CALL_22 Int)) (not (= (select (select |c_#memory_$Pointer$.base| v_main_~s~0.base_BEFORE_CALL_22) v_main_~s~0.offset_BEFORE_CALL_22) v_main_~s~0.base_BEFORE_CALL_22))) is different from true [2021-10-13 00:53:35,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 00:53:35,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2021-10-13 00:53:35,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2021-10-13 00:53:35,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-10-13 00:53:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-10-13 00:53:35,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136644110] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:53:35,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:53:35,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 73 [2021-10-13 00:53:35,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457895358] [2021-10-13 00:53:35,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-10-13 00:53:35,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:53:35,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-10-13 00:53:35,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=4652, Unknown=5, NotChecked=414, Total=5256 [2021-10-13 00:53:35,078 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 73 states, 69 states have (on average 1.7536231884057971) internal successors, (121), 59 states have internal predecessors, (121), 11 states have call successors, (17), 9 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2021-10-13 00:54:12,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:12,319 INFO L93 Difference]: Finished difference Result 123 states and 126 transitions. [2021-10-13 00:54:12,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 00:54:12,319 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 69 states have (on average 1.7536231884057971) internal successors, (121), 59 states have internal predecessors, (121), 11 states have call successors, (17), 9 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) Word has length 81 [2021-10-13 00:54:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:12,320 INFO L225 Difference]: With dead ends: 123 [2021-10-13 00:54:12,321 INFO L226 Difference]: Without dead ends: 123 [2021-10-13 00:54:12,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 56315.5ms TimeCoverageRelationStatistics Valid=500, Invalid=10009, Unknown=9, NotChecked=612, Total=11130 [2021-10-13 00:54:12,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-10-13 00:54:12,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2021-10-13 00:54:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 75 states have (on average 1.16) internal successors, (87), 85 states have internal predecessors, (87), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:54:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2021-10-13 00:54:12,327 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 81 [2021-10-13 00:54:12,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:12,327 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2021-10-13 00:54:12,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 69 states have (on average 1.7536231884057971) internal successors, (121), 59 states have internal predecessors, (121), 11 states have call successors, (17), 9 states have call predecessors, (17), 14 states have return successors, (15), 14 states have call predecessors, (15), 11 states have call successors, (15) [2021-10-13 00:54:12,328 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2021-10-13 00:54:12,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-13 00:54:12,329 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:12,329 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:12,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:12,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 00:54:12,543 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting sll_circular_destroyErr0REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:54:12,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:12,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1153762942, now seen corresponding path program 1 times [2021-10-13 00:54:12,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:12,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875206786] [2021-10-13 00:54:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:12,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:12,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:12,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:54:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:12,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:54:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:12,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:54:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:12,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:54:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:12,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:54:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:12,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-13 00:54:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:12,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-13 00:54:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:12,700 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-13 00:54:12,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:12,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875206786] [2021-10-13 00:54:12,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875206786] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:12,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461474335] [2021-10-13 00:54:12,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:12,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:54:12,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:12,707 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:54:12,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 00:54:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:13,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 00:54:13,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:54:13,572 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 [2021-10-13 00:54:13,939 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 00:54:13,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461474335] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:13,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 00:54:13,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [9] total 17 [2021-10-13 00:54:13,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650443652] [2021-10-13 00:54:13,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 00:54:13,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:13,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:54:13,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:54:13,941 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-13 00:54:14,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:14,196 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2021-10-13 00:54:14,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 00:54:14,196 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 86 [2021-10-13 00:54:14,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:14,197 INFO L225 Difference]: With dead ends: 124 [2021-10-13 00:54:14,197 INFO L226 Difference]: Without dead ends: 124 [2021-10-13 00:54:14,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-10-13 00:54:14,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-13 00:54:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2021-10-13 00:54:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 88 states have internal predecessors, (93), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:54:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 112 transitions. [2021-10-13 00:54:14,201 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 112 transitions. Word has length 86 [2021-10-13 00:54:14,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:14,202 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 112 transitions. [2021-10-13 00:54:14,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 10 states have internal predecessors, (53), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-13 00:54:14,202 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 112 transitions. [2021-10-13 00:54:14,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-13 00:54:14,204 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:14,204 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:14,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:14,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-13 00:54:14,419 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting sll_circular_destroyErr1REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:54:14,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:14,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1153762941, now seen corresponding path program 1 times [2021-10-13 00:54:14,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:14,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384300657] [2021-10-13 00:54:14,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:14,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:14,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:14,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:54:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:14,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:54:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:14,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:54:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:14,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:54:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:14,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:54:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:14,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-13 00:54:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:14,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-13 00:54:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 00:54:14,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:14,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384300657] [2021-10-13 00:54:14,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384300657] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:14,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:14,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-13 00:54:14,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039895349] [2021-10-13 00:54:14,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 00:54:14,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:14,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 00:54:14,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:54:14,729 INFO L87 Difference]: Start difference. First operand 107 states and 112 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-13 00:54:15,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:15,406 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2021-10-13 00:54:15,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 00:54:15,407 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 86 [2021-10-13 00:54:15,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:15,408 INFO L225 Difference]: With dead ends: 118 [2021-10-13 00:54:15,408 INFO L226 Difference]: Without dead ends: 118 [2021-10-13 00:54:15,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 326.8ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-10-13 00:54:15,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-13 00:54:15,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2021-10-13 00:54:15,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 79 states have (on average 1.139240506329114) internal successors, (90), 86 states have internal predecessors, (90), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:54:15,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-10-13 00:54:15,413 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 86 [2021-10-13 00:54:15,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:15,413 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-10-13 00:54:15,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 9 states have internal predecessors, (53), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-13 00:54:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-10-13 00:54:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-13 00:54:15,414 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:15,415 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:15,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-13 00:54:15,415 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting sll_circular_destroyErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:54:15,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:15,416 INFO L82 PathProgramCache]: Analyzing trace with hash 871538537, now seen corresponding path program 1 times [2021-10-13 00:54:15,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:15,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750795992] [2021-10-13 00:54:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:15,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:15,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:15,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:54:15,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:15,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:54:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:15,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:54:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:15,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:54:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:15,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:54:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:15,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-13 00:54:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:15,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-13 00:54:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-13 00:54:15,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:15,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750795992] [2021-10-13 00:54:15,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750795992] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:15,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393735690] [2021-10-13 00:54:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:15,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:54:15,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:15,663 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:54:15,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 00:54:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:16,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-13 00:54:16,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:54:16,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-10-13 00:54:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 00:54:16,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393735690] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:16,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:54:16,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 24 [2021-10-13 00:54:16,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664253400] [2021-10-13 00:54:16,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 00:54:16,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:16,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 00:54:16,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2021-10-13 00:54:16,856 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 25 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 18 states have internal predecessors, (91), 4 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 6 states have call predecessors, (12), 2 states have call successors, (12) [2021-10-13 00:54:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:17,734 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2021-10-13 00:54:17,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 00:54:17,737 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 18 states have internal predecessors, (91), 4 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 6 states have call predecessors, (12), 2 states have call successors, (12) Word has length 89 [2021-10-13 00:54:17,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:17,738 INFO L225 Difference]: With dead ends: 118 [2021-10-13 00:54:17,738 INFO L226 Difference]: Without dead ends: 118 [2021-10-13 00:54:17,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 598.9ms TimeCoverageRelationStatistics Valid=157, Invalid=1325, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 00:54:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-13 00:54:17,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2021-10-13 00:54:17,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.1375) internal successors, (91), 86 states have internal predecessors, (91), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:54:17,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2021-10-13 00:54:17,742 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 89 [2021-10-13 00:54:17,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:17,742 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2021-10-13 00:54:17,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 18 states have internal predecessors, (91), 4 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (12), 6 states have call predecessors, (12), 2 states have call successors, (12) [2021-10-13 00:54:17,743 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2021-10-13 00:54:17,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-13 00:54:17,744 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:17,744 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:17,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:17,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:54:17,947 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting sll_circular_destroyErr3REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:54:17,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:17,947 INFO L82 PathProgramCache]: Analyzing trace with hash 871538538, now seen corresponding path program 1 times [2021-10-13 00:54:17,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:17,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757987156] [2021-10-13 00:54:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:17,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:18,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:18,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:54:18,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:18,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:54:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:18,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:54:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:18,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:54:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:18,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:54:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:19,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-13 00:54:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:19,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-13 00:54:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:19,166 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 00:54:19,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:19,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757987156] [2021-10-13 00:54:19,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757987156] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:19,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608218116] [2021-10-13 00:54:19,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:19,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:54:19,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:19,168 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:54:19,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 00:54:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:19,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 113 conjunts are in the unsatisfiable core [2021-10-13 00:54:19,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:54:19,966 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 [2021-10-13 00:54:20,256 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:54:20,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:54:20,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:54:20,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:54:20,605 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:54:20,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 49 [2021-10-13 00:54:20,618 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 00:54:20,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 50 [2021-10-13 00:54:23,794 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.offset| |c_sll_circular_update_at_#in~head.base|) .cse0)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_sll_circular_update_at_#in~head.base|) .cse0)))) (<= |c_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset)))) is different from true [2021-10-13 00:54:23,847 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-10-13 00:54:23,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 80 [2021-10-13 00:54:23,868 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-10-13 00:54:23,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 63 [2021-10-13 00:54:25,628 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (= |c_#memory_$Pointer$.offset| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_$Pointer$.offset)| .cse0 (let ((.cse1 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$Pointer$.offset)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1))))))) is different from true [2021-10-13 00:54:25,674 INFO L354 Elim1Store]: treesize reduction 25, result has 24.2 percent of original size [2021-10-13 00:54:25,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 72 [2021-10-13 00:54:25,712 INFO L354 Elim1Store]: treesize reduction 60, result has 36.8 percent of original size [2021-10-13 00:54:25,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 72 [2021-10-13 00:54:30,782 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-10-13 00:54:30,783 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 81 treesize of output 64 [2021-10-13 00:54:30,788 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 54 treesize of output 46 [2021-10-13 00:54:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2021-10-13 00:54:30,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608218116] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:30,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:54:30,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 65 [2021-10-13 00:54:30,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028969768] [2021-10-13 00:54:30,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-13 00:54:30,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:30,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-13 00:54:30,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3855, Unknown=4, NotChecked=250, Total=4290 [2021-10-13 00:54:30,990 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand has 66 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 53 states have internal predecessors, (125), 11 states have call successors, (17), 8 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-13 00:54:42,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:42,825 INFO L93 Difference]: Finished difference Result 118 states and 120 transitions. [2021-10-13 00:54:42,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 00:54:42,826 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 53 states have internal predecessors, (125), 11 states have call successors, (17), 8 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) Word has length 89 [2021-10-13 00:54:42,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:42,827 INFO L225 Difference]: With dead ends: 118 [2021-10-13 00:54:42,828 INFO L226 Difference]: Without dead ends: 118 [2021-10-13 00:54:42,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 13277.1ms TimeCoverageRelationStatistics Valid=497, Invalid=7879, Unknown=4, NotChecked=362, Total=8742 [2021-10-13 00:54:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-13 00:54:42,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 107. [2021-10-13 00:54:42,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 88 states have internal predecessors, (92), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:54:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2021-10-13 00:54:42,833 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 89 [2021-10-13 00:54:42,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:42,833 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2021-10-13 00:54:42,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.9230769230769231) internal successors, (125), 53 states have internal predecessors, (125), 11 states have call successors, (17), 8 states have call predecessors, (17), 12 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) [2021-10-13 00:54:42,834 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2021-10-13 00:54:42,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-13 00:54:42,835 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:42,835 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:42,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:43,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:54:43,047 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:54:43,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:43,047 INFO L82 PathProgramCache]: Analyzing trace with hash 904070889, now seen corresponding path program 1 times [2021-10-13 00:54:43,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:43,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562144365] [2021-10-13 00:54:43,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:43,048 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:54:43,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:54:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:54:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:54:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:54:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-13 00:54:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-13 00:54:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-10-13 00:54:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 00:54:43,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:43,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562144365] [2021-10-13 00:54:43,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562144365] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:43,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:43,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-10-13 00:54:43,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856218911] [2021-10-13 00:54:43,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 00:54:43,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:43,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 00:54:43,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-10-13 00:54:43,312 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 10 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-13 00:54:43,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:43,738 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2021-10-13 00:54:43,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 00:54:43,738 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 10 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) Word has length 89 [2021-10-13 00:54:43,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:43,739 INFO L225 Difference]: With dead ends: 113 [2021-10-13 00:54:43,740 INFO L226 Difference]: Without dead ends: 111 [2021-10-13 00:54:43,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 245.7ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:54:43,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-13 00:54:43,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2021-10-13 00:54:43,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 88 states have internal predecessors, (91), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:54:43,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2021-10-13 00:54:43,744 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 89 [2021-10-13 00:54:43,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:43,745 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2021-10-13 00:54:43,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 10 states have internal predecessors, (55), 2 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 2 states have call successors, (7) [2021-10-13 00:54:43,745 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2021-10-13 00:54:43,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-10-13 00:54:43,746 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:43,746 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:43,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-10-13 00:54:43,747 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:54:43,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:43,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1247889481, now seen corresponding path program 1 times [2021-10-13 00:54:43,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:43,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743692525] [2021-10-13 00:54:43,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:43,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:54:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:54:43,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:54:43,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:54:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:54:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:43,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-13 00:54:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:44,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-13 00:54:44,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 00:54:44,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:44,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743692525] [2021-10-13 00:54:44,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743692525] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:54:44,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:54:44,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-13 00:54:44,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770373395] [2021-10-13 00:54:44,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 00:54:44,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:44,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 00:54:44,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:54:44,008 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-13 00:54:44,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:44,559 INFO L93 Difference]: Finished difference Result 109 states and 111 transitions. [2021-10-13 00:54:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 00:54:44,559 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2021-10-13 00:54:44,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:44,560 INFO L225 Difference]: With dead ends: 109 [2021-10-13 00:54:44,560 INFO L226 Difference]: Without dead ends: 109 [2021-10-13 00:54:44,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-10-13 00:54:44,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-13 00:54:44,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2021-10-13 00:54:44,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 87 states have internal predecessors, (89), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:54:44,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-10-13 00:54:44,564 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 90 [2021-10-13 00:54:44,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:44,565 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-10-13 00:54:44,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.071428571428571) internal successors, (57), 9 states have internal predecessors, (57), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2021-10-13 00:54:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-10-13 00:54:44,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-13 00:54:44,566 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:44,566 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:44,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-10-13 00:54:44,566 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:54:44,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:44,567 INFO L82 PathProgramCache]: Analyzing trace with hash 927337902, now seen corresponding path program 1 times [2021-10-13 00:54:44,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:44,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626848681] [2021-10-13 00:54:44,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:44,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:44,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:44,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:44,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:54:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:44,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:54:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:45,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:54:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:45,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:54:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:45,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:54:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:45,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-13 00:54:45,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:45,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-13 00:54:45,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-13 00:54:45,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:45,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626848681] [2021-10-13 00:54:45,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626848681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:45,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434422241] [2021-10-13 00:54:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:45,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:54:45,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:45,451 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:54:45,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 00:54:46,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:46,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-13 00:54:46,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:54:46,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:54:46,574 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 [2021-10-13 00:54:46,711 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:54:46,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:54:46,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:54:46,848 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:54:46,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-13 00:54:47,170 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:54:47,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-10-13 00:54:48,082 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base| (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_sll_circular_update_at_#in~head.base|) .cse0))))) (<= |c_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset))) is different from true [2021-10-13 00:54:48,123 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-10-13 00:54:48,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 33 [2021-10-13 00:54:48,167 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:54:48,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 16 [2021-10-13 00:54:49,342 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (= |c_#memory_$Pointer$.base| (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|))) (store |c_old(#memory_$Pointer$.base)| .cse0 (let ((.cse1 (+ sll_circular_update_at_~head.offset 4))) (store (select |c_old(#memory_$Pointer$.base)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.base| .cse0) .cse1))))))) is different from true [2021-10-13 00:54:49,382 INFO L354 Elim1Store]: treesize reduction 127, result has 15.9 percent of original size [2021-10-13 00:54:49,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 60 treesize of output 57 [2021-10-13 00:54:49,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-10-13 00:54:49,871 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 2 not checked. [2021-10-13 00:54:49,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434422241] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:49,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:54:49,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 45 [2021-10-13 00:54:49,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166138869] [2021-10-13 00:54:49,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-13 00:54:49,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:54:49,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-13 00:54:49,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1752, Unknown=2, NotChecked=170, Total=2070 [2021-10-13 00:54:49,873 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 35 states have internal predecessors, (109), 6 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-13 00:54:55,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:54:55,612 INFO L93 Difference]: Finished difference Result 110 states and 112 transitions. [2021-10-13 00:54:55,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 00:54:55,613 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 35 states have internal predecessors, (109), 6 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) Word has length 92 [2021-10-13 00:54:55,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:54:55,614 INFO L225 Difference]: With dead ends: 110 [2021-10-13 00:54:55,614 INFO L226 Difference]: Without dead ends: 110 [2021-10-13 00:54:55,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 81 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 7890.5ms TimeCoverageRelationStatistics Valid=432, Invalid=3864, Unknown=2, NotChecked=258, Total=4556 [2021-10-13 00:54:55,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-13 00:54:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-10-13 00:54:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 88 states have internal predecessors, (90), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:54:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2021-10-13 00:54:55,617 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 92 [2021-10-13 00:54:55,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:54:55,618 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2021-10-13 00:54:55,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 35 states have internal predecessors, (109), 6 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2021-10-13 00:54:55,618 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2021-10-13 00:54:55,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-13 00:54:55,619 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:54:55,620 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:54:55,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-13 00:54:55,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-13 00:54:55,845 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting sll_circular_destroyErr2REQUIRES_VIOLATION === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:54:55,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:54:55,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1093942222, now seen corresponding path program 1 times [2021-10-13 00:54:55,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:54:55,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005634858] [2021-10-13 00:54:55,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:55,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:54:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:56,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:54:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:56,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:54:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:56,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:54:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:56,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:54:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:56,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:54:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:57,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:54:57,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:57,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-13 00:54:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:57,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-13 00:54:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-13 00:54:57,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:54:57,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005634858] [2021-10-13 00:54:57,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005634858] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:54:57,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725335262] [2021-10-13 00:54:57,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:54:57,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:54:57,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:54:57,379 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:54:57,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 00:54:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:54:58,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 113 conjunts are in the unsatisfiable core [2021-10-13 00:54:58,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:54:58,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 00:54:58,724 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 00:54:58,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 00:54:58,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:54:58,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:54:58,966 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 00:54:58,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2021-10-13 00:54:58,975 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-13 00:54:58,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 41 [2021-10-13 00:55:00,831 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (let ((.cse0 (+ sll_circular_update_at_~head.offset 4))) (and (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.offset| |c_sll_circular_update_at_#in~head.base|) .cse0)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base| (store (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) .cse0 (select (select |c_#memory_$Pointer$.base| |c_sll_circular_update_at_#in~head.base|) .cse0)))) (<= |c_sll_circular_update_at_#in~head.offset| sll_circular_update_at_~head.offset)))) is different from true [2021-10-13 00:55:00,869 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-13 00:55:00,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 66 [2021-10-13 00:55:00,890 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-10-13 00:55:00,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 43 [2021-10-13 00:55:03,073 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_circular_update_at_~head.offset Int)) (let ((.cse0 (select (select |c_old(#memory_$Pointer$.base)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|)) (.cse1 (+ sll_circular_update_at_~head.offset 4))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| .cse0 (store (select |c_old(#memory_$Pointer$.base)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.base| .cse0) .cse1)))) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| .cse0 (store (select |c_old(#memory_$Pointer$.offset)| .cse0) .cse1 (select (select |c_#memory_$Pointer$.offset| .cse0) .cse1)))) (<= (select (select |c_old(#memory_$Pointer$.offset)| |c_sll_circular_update_at_#in~head.base|) |c_sll_circular_update_at_#in~head.offset|) sll_circular_update_at_~head.offset)))) is different from true [2021-10-13 00:55:03,135 INFO L354 Elim1Store]: treesize reduction 153, result has 12.6 percent of original size [2021-10-13 00:55:03,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 87 [2021-10-13 00:55:03,160 INFO L354 Elim1Store]: treesize reduction 165, result has 11.8 percent of original size [2021-10-13 00:55:03,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 50 [2021-10-13 00:55:07,488 INFO L354 Elim1Store]: treesize reduction 69, result has 9.2 percent of original size [2021-10-13 00:55:07,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 48 [2021-10-13 00:55:07,502 INFO L354 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2021-10-13 00:55:07,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 26 [2021-10-13 00:55:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 2 not checked. [2021-10-13 00:55:07,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725335262] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:55:07,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:55:07,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33] total 62 [2021-10-13 00:55:07,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403882423] [2021-10-13 00:55:07,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-13 00:55:07,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:55:07,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-13 00:55:07,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3355, Unknown=3, NotChecked=234, Total=3782 [2021-10-13 00:55:07,727 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 49 states have internal predecessors, (124), 7 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-10-13 00:55:26,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:55:26,158 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-10-13 00:55:26,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 00:55:26,159 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 49 states have internal predecessors, (124), 7 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) Word has length 95 [2021-10-13 00:55:26,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:55:26,160 INFO L225 Difference]: With dead ends: 96 [2021-10-13 00:55:26,160 INFO L226 Difference]: Without dead ends: 96 [2021-10-13 00:55:26,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 17595.0ms TimeCoverageRelationStatistics Valid=492, Invalid=6319, Unknown=3, NotChecked=326, Total=7140 [2021-10-13 00:55:26,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-13 00:55:26,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-10-13 00:55:26,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 76 states have (on average 1.013157894736842) internal successors, (77), 77 states have internal predecessors, (77), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:55:26,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-10-13 00:55:26,164 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 95 [2021-10-13 00:55:26,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:55:26,164 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-10-13 00:55:26,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 49 states have internal predecessors, (124), 7 states have call successors, (16), 9 states have call predecessors, (16), 11 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2021-10-13 00:55:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-10-13 00:55:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-13 00:55:26,166 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:55:26,166 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:55:26,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 00:55:26,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-13 00:55:26,374 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:55:26,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:55:26,374 INFO L82 PathProgramCache]: Analyzing trace with hash -988555106, now seen corresponding path program 1 times [2021-10-13 00:55:26,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:55:26,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270742775] [2021-10-13 00:55:26,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:26,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:55:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:26,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:55:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:26,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:55:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:26,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:55:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:26,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:55:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:26,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:55:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:26,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:55:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:27,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-13 00:55:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:27,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-13 00:55:27,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-10-13 00:55:27,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:55:27,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270742775] [2021-10-13 00:55:27,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270742775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:55:27,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200053671] [2021-10-13 00:55:27,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:27,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:55:27,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:55:27,036 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:55:27,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 00:55:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:28,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 00:55:28,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:55:28,487 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-10-13 00:55:28,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2021-10-13 00:55:28,634 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-13 00:55:28,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200053671] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:55:28,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:55:28,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 7] total 35 [2021-10-13 00:55:28,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103936496] [2021-10-13 00:55:28,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 00:55:28,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:55:28,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 00:55:28,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 00:55:28,644 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 36 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 29 states have internal predecessors, (115), 4 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-13 00:55:30,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:55:30,185 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2021-10-13 00:55:30,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 00:55:30,186 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 29 states have internal predecessors, (115), 4 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 97 [2021-10-13 00:55:30,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:55:30,187 INFO L225 Difference]: With dead ends: 95 [2021-10-13 00:55:30,187 INFO L226 Difference]: Without dead ends: 95 [2021-10-13 00:55:30,187 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1312.7ms TimeCoverageRelationStatistics Valid=284, Invalid=2686, Unknown=0, NotChecked=0, Total=2970 [2021-10-13 00:55:30,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-13 00:55:30,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-10-13 00:55:30,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 76 states have (on average 1.0) internal successors, (76), 76 states have internal predecessors, (76), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-10-13 00:55:30,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-10-13 00:55:30,191 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 97 [2021-10-13 00:55:30,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:55:30,191 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-10-13 00:55:30,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 29 states have internal predecessors, (115), 4 states have call successors, (16), 5 states have call predecessors, (16), 6 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-10-13 00:55:30,192 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-10-13 00:55:30,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-13 00:55:30,193 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:55:30,193 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:55:30,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 00:55:30,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:55:30,408 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr1ENSURES_VIOLATIONMEMORY_LEAK === [node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION (and 24 more)] === [2021-10-13 00:55:30,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:55:30,408 INFO L82 PathProgramCache]: Analyzing trace with hash -261539966, now seen corresponding path program 1 times [2021-10-13 00:55:30,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:55:30,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072997494] [2021-10-13 00:55:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:30,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:55:30,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:30,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 00:55:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:30,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 00:55:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:31,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-10-13 00:55:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:31,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-10-13 00:55:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:31,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-10-13 00:55:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:31,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-10-13 00:55:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:31,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-10-13 00:55:31,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:31,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-13 00:55:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:31,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-10-13 00:55:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-13 00:55:31,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:55:31,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072997494] [2021-10-13 00:55:31,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072997494] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:55:31,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102570200] [2021-10-13 00:55:31,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:55:31,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:55:31,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:55:31,839 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:55:31,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 00:55:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:55:33,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-13 00:55:33,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:55:33,322 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-13 00:55:33,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-10-13 00:55:33,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 00:55:33,609 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-13 00:55:33,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 32 [2021-10-13 00:55:34,049 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:55:34,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 31 [2021-10-13 00:55:34,053 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:55:34,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-10-13 00:55:43,180 INFO L354 Elim1Store]: treesize reduction 66, result has 24.1 percent of original size [2021-10-13 00:55:43,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 44 [2021-10-13 00:55:43,430 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:55:43,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 40 [2021-10-13 00:55:43,434 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 00:55:43,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 33 [2021-10-13 00:55:44,129 INFO L354 Elim1Store]: treesize reduction 132, result has 15.4 percent of original size [2021-10-13 00:55:44,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 77 [2021-10-13 00:55:44,296 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:55:44,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2021-10-13 00:55:44,579 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:55:44,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2021-10-13 00:55:44,900 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:55:44,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 29 [2021-10-13 00:55:44,903 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-13 00:55:44,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 15 [2021-10-13 00:56:13,686 INFO L354 Elim1Store]: treesize reduction 17, result has 41.4 percent of original size [2021-10-13 00:56:13,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 55 [2021-10-13 00:56:13,699 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-13 00:56:13,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 43 [2021-10-13 00:56:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-13 00:56:13,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102570200] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:56:13,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:56:13,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 61 [2021-10-13 00:56:13,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571174967] [2021-10-13 00:56:13,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-13 00:56:13,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:56:13,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-13 00:56:13,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3577, Unknown=15, NotChecked=0, Total=3782 [2021-10-13 00:56:13,833 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 62 states, 61 states have (on average 2.262295081967213) internal successors, (138), 52 states have internal predecessors, (138), 8 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-13 00:57:12,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:57:12,950 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-10-13 00:57:12,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 00:57:12,950 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.262295081967213) internal successors, (138), 52 states have internal predecessors, (138), 8 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) Word has length 101 [2021-10-13 00:57:12,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:57:12,951 INFO L225 Difference]: With dead ends: 94 [2021-10-13 00:57:12,951 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 00:57:12,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 80 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 59829.3ms TimeCoverageRelationStatistics Valid=501, Invalid=7314, Unknown=17, NotChecked=0, Total=7832 [2021-10-13 00:57:12,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 00:57:12,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 00:57:12,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:57:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 00:57:12,953 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 101 [2021-10-13 00:57:12,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:57:12,953 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:57:12,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.262295081967213) internal successors, (138), 52 states have internal predecessors, (138), 8 states have call successors, (17), 8 states have call predecessors, (17), 13 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2021-10-13 00:57:12,954 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 00:57:12,954 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 00:57:12,956 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-10-13 00:57:12,957 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-10-13 00:57:12,957 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-10-13 00:57:12,957 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-10-13 00:57:12,957 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 00:57:12,957 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 00:57:12,958 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr0REQUIRES_VIOLATION [2021-10-13 00:57:12,958 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr1REQUIRES_VIOLATION [2021-10-13 00:57:12,958 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr2REQUIRES_VIOLATION [2021-10-13 00:57:12,958 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_update_atErr3REQUIRES_VIOLATION [2021-10-13 00:57:12,958 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr0REQUIRES_VIOLATION [2021-10-13 00:57:12,958 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr1REQUIRES_VIOLATION [2021-10-13 00:57:12,959 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr2REQUIRES_VIOLATION [2021-10-13 00:57:12,959 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr3REQUIRES_VIOLATION [2021-10-13 00:57:12,959 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:57:12,959 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr5ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:57:12,959 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr6ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:57:12,960 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr7ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:57:12,960 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:57:12,960 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_destroyErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 00:57:12,960 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr0REQUIRES_VIOLATION [2021-10-13 00:57:12,960 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr1REQUIRES_VIOLATION [2021-10-13 00:57:12,960 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr2REQUIRES_VIOLATION [2021-10-13 00:57:12,961 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_createErr3REQUIRES_VIOLATION [2021-10-13 00:57:12,961 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr0REQUIRES_VIOLATION [2021-10-13 00:57:12,961 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr1REQUIRES_VIOLATION [2021-10-13 00:57:12,961 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr2REQUIRES_VIOLATION [2021-10-13 00:57:12,961 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_circular_get_data_atErr3REQUIRES_VIOLATION [2021-10-13 00:57:12,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-13 00:57:13,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:57:13,166 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:57:13,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:57:13 BoogieIcfgContainer [2021-10-13 00:57:13,169 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:57:13,169 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:57:13,169 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:57:13,170 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:57:13,170 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:48:14" (3/4) ... [2021-10-13 00:57:13,173 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 00:57:13,179 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-13 00:57:13,180 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-13 00:57:13,180 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-13 00:57:13,180 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_get_data_at [2021-10-13 00:57:13,180 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-13 00:57:13,180 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-13 00:57:13,181 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_create [2021-10-13 00:57:13,181 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_destroy [2021-10-13 00:57:13,181 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-13 00:57:13,181 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_circular_update_at [2021-10-13 00:57:13,181 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-10-13 00:57:13,187 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 24 nodes and edges [2021-10-13 00:57:13,188 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-13 00:57:13,188 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-13 00:57:13,189 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:57:13,259 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:57:13,259 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:57:13,260 INFO L168 Benchmark]: Toolchain (without parser) took 540588.18 ms. Allocated memory was 88.1 MB in the beginning and 195.0 MB in the end (delta: 107.0 MB). Free memory was 51.9 MB in the beginning and 47.1 MB in the end (delta: 4.8 MB). Peak memory consumption was 109.8 MB. Max. memory is 16.1 GB. [2021-10-13 00:57:13,261 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 88.1 MB. Free memory was 60.5 MB in the beginning and 60.4 MB in the end (delta: 24.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:57:13,261 INFO L168 Benchmark]: CACSL2BoogieTranslator took 491.92 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 51.8 MB in the beginning and 75.9 MB in the end (delta: -24.2 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-13 00:57:13,261 INFO L168 Benchmark]: Boogie Preprocessor took 114.84 ms. Allocated memory is still 107.0 MB. Free memory was 75.9 MB in the beginning and 73.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:57:13,262 INFO L168 Benchmark]: RCFGBuilder took 764.32 ms. Allocated memory is still 107.0 MB. Free memory was 72.9 MB in the beginning and 75.2 MB in the end (delta: -2.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. [2021-10-13 00:57:13,263 INFO L168 Benchmark]: TraceAbstraction took 539118.51 ms. Allocated memory was 107.0 MB in the beginning and 195.0 MB in the end (delta: 88.1 MB). Free memory was 74.8 MB in the beginning and 51.3 MB in the end (delta: 23.4 MB). Peak memory consumption was 111.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:57:13,263 INFO L168 Benchmark]: Witness Printer took 90.22 ms. Allocated memory is still 195.0 MB. Free memory was 51.3 MB in the beginning and 47.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:57:13,268 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 88.1 MB. Free memory was 60.5 MB in the beginning and 60.4 MB in the end (delta: 24.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 491.92 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 51.8 MB in the beginning and 75.9 MB in the end (delta: -24.2 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 114.84 ms. Allocated memory is still 107.0 MB. Free memory was 75.9 MB in the beginning and 73.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 764.32 ms. Allocated memory is still 107.0 MB. Free memory was 72.9 MB in the beginning and 75.2 MB in the end (delta: -2.2 MB). Peak memory consumption was 22.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 539118.51 ms. Allocated memory was 107.0 MB in the beginning and 195.0 MB in the end (delta: 88.1 MB). Free memory was 74.8 MB in the beginning and 51.3 MB in the end (delta: 23.4 MB). Peak memory consumption was 111.1 MB. Max. memory is 16.1 GB. * Witness Printer took 90.22 ms. Allocated memory is still 195.0 MB. Free memory was 51.3 MB in the beginning and 47.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 637]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 620]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 615]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 615]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 618]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 618]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 597]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 597]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 599]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 599]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 600]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 603]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 588]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 588]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 608]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 608]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 611]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 611]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 114 locations, 28 error locations. Started 1 CEGAR loops. OverallTime: 539061.7ms, OverallIterations: 37, TraceHistogramMax: 3, EmptinessCheckTime: 59.5ms, AutomataDifference: 323211.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2310 SDtfs, 7269 SDslu, 12394 SDs, 0 SdLazy, 44657 SolverSat, 1656 SolverUnsat, 161 SolverUnknown, 0 SolverNotchecked, 192884.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2934 GetRequests, 1638 SyntacticMatches, 47 SemanticMatches, 1249 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 12880 ImplicationChecksByTransitivity, 295063.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=160occurred in iteration=15, InterpolantAutomatonStates: 650, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 316.3ms AutomataMinimizationTime, 37 MinimizatonAttempts, 773 StatesRemovedByMinimization, 33 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 451.5ms SsaConstructionTime, 1704.0ms SatisfiabilityAnalysisTime, 195853.2ms InterpolantComputationTime, 3876 NumberOfCodeBlocks, 3849 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 3816 ConstructedInterpolants, 338 QuantifiedInterpolants, 37461 SizeOfPredicates, 292 NumberOfNonLiveVariables, 8352 ConjunctsInSsa, 1142 ConjunctsInUnsatCore, 60 InterpolantComputations, 18 PerfectInterpolantSequences, 975/1376 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 28 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-13 00:57:13,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_63962906-f9de-47c9-8aeb-8d0e6986d229/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...