./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_remove_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_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/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_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/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_923e23ee-fe44-4a71-ab72-5a2232227ef9/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 429d2952e247c8d1d32d3027545d64f06bfba6cc ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 01:18:49,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 01:18:49,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 01:18:49,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 01:18:49,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 01:18:49,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 01:18:49,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 01:18:49,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 01:18:49,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 01:18:49,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 01:18:49,567 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 01:18:49,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 01:18:49,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 01:18:49,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 01:18:49,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 01:18:49,575 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 01:18:49,576 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 01:18:49,577 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 01:18:49,580 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 01:18:49,598 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 01:18:49,601 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 01:18:49,605 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 01:18:49,606 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 01:18:49,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 01:18:49,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 01:18:49,612 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 01:18:49,619 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 01:18:49,621 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 01:18:49,621 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 01:18:49,623 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 01:18:49,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 01:18:49,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 01:18:49,626 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 01:18:49,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 01:18:49,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 01:18:49,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 01:18:49,630 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 01:18:49,630 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 01:18:49,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 01:18:49,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 01:18:49,632 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 01:18:49,633 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-13 01:18:49,673 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 01:18:49,677 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 01:18:49,678 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 01:18:49,678 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 01:18:49,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 01:18:49,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 01:18:49,686 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 01:18:49,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 01:18:49,686 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 01:18:49,687 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 01:18:49,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 01:18:49,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 01:18:49,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 01:18:49,687 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 01:18:49,688 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 01:18:49,688 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 01:18:49,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 01:18:49,688 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 01:18:49,688 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 01:18:49,688 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 01:18:49,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 01:18:49,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 01:18:49,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 01:18:49,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:18:49,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 01:18:49,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 01:18:49,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 01:18:49,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 01:18:49,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 01:18:49,691 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_923e23ee-fe44-4a71-ab72-5a2232227ef9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 429d2952e247c8d1d32d3027545d64f06bfba6cc [2021-10-13 01:18:49,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 01:18:49,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 01:18:49,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 01:18:49,969 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 01:18:49,970 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 01:18:49,971 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/list-simple/dll2n_remove_all.i [2021-10-13 01:18:50,050 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/data/dcd4f0132/73d7f32a2d0b4b228e66e6b62b1f4514/FLAGa4b3b5efa [2021-10-13 01:18:50,646 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 01:18:50,647 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/sv-benchmarks/c/list-simple/dll2n_remove_all.i [2021-10-13 01:18:50,668 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/data/dcd4f0132/73d7f32a2d0b4b228e66e6b62b1f4514/FLAGa4b3b5efa [2021-10-13 01:18:50,882 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/data/dcd4f0132/73d7f32a2d0b4b228e66e6b62b1f4514 [2021-10-13 01:18:50,885 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 01:18:50,887 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-13 01:18:50,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 01:18:50,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 01:18:50,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 01:18:50,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:18:50" (1/1) ... [2021-10-13 01:18:50,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@876159b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:50, skipping insertion in model container [2021-10-13 01:18:50,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:18:50" (1/1) ... [2021-10-13 01:18:50,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 01:18:50,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 01:18:51,348 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_923e23ee-fe44-4a71-ab72-5a2232227ef9/sv-benchmarks/c/list-simple/dll2n_remove_all.i[24090,24103] [2021-10-13 01:18:51,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:18:51,369 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 01:18:51,458 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_923e23ee-fe44-4a71-ab72-5a2232227ef9/sv-benchmarks/c/list-simple/dll2n_remove_all.i[24090,24103] [2021-10-13 01:18:51,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:18:51,506 INFO L208 MainTranslator]: Completed translation [2021-10-13 01:18:51,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:51 WrapperNode [2021-10-13 01:18:51,507 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 01:18:51,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 01:18:51,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 01:18:51,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 01:18:51,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:51" (1/1) ... [2021-10-13 01:18:51,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:51" (1/1) ... [2021-10-13 01:18:51,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:51" (1/1) ... [2021-10-13 01:18:51,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:51" (1/1) ... [2021-10-13 01:18:51,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:51" (1/1) ... [2021-10-13 01:18:51,614 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:51" (1/1) ... [2021-10-13 01:18:51,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:51" (1/1) ... [2021-10-13 01:18:51,625 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 01:18:51,626 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 01:18:51,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 01:18:51,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 01:18:51,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:51" (1/1) ... [2021-10-13 01:18:51,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:18:51,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:18:51,684 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 01:18:51,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 01:18:51,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-13 01:18:51,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 01:18:51,734 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-13 01:18:51,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-13 01:18:51,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-13 01:18:51,734 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-13 01:18:51,735 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-10-13 01:18:51,735 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2021-10-13 01:18:51,735 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_remove_first [2021-10-13 01:18:51,735 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-13 01:18:51,736 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-13 01:18:51,736 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-13 01:18:51,736 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-13 01:18:51,736 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-13 01:18:51,736 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-13 01:18:51,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 01:18:51,737 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-13 01:18:51,737 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-13 01:18:51,737 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-13 01:18:51,738 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-13 01:18:51,738 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-13 01:18:51,738 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-13 01:18:51,738 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-13 01:18:51,738 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-13 01:18:51,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-13 01:18:51,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-13 01:18:51,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-13 01:18:51,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-13 01:18:51,739 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-13 01:18:51,740 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-13 01:18:51,740 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-13 01:18:51,740 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-13 01:18:51,740 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-13 01:18:51,740 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-13 01:18:51,741 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-13 01:18:51,741 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-13 01:18:51,741 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-13 01:18:51,741 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-13 01:18:51,742 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-13 01:18:51,742 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-13 01:18:51,742 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-13 01:18:51,742 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-13 01:18:51,742 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-13 01:18:51,742 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-13 01:18:51,743 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-13 01:18:51,743 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-13 01:18:51,743 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-13 01:18:51,743 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-13 01:18:51,743 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-13 01:18:51,744 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-13 01:18:51,744 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-13 01:18:51,744 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-13 01:18:51,744 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-13 01:18:51,745 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-13 01:18:51,745 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-13 01:18:51,745 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-13 01:18:51,745 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-13 01:18:51,745 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-13 01:18:51,746 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-13 01:18:51,746 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-13 01:18:51,746 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-13 01:18:51,746 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-13 01:18:51,746 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-13 01:18:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-13 01:18:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-13 01:18:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-13 01:18:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-13 01:18:51,747 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-13 01:18:51,748 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-13 01:18:51,748 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-13 01:18:51,748 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-13 01:18:51,748 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-13 01:18:51,748 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-13 01:18:51,749 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-13 01:18:51,749 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-13 01:18:51,749 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-13 01:18:51,749 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-13 01:18:51,749 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-13 01:18:51,750 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-13 01:18:51,750 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-13 01:18:51,750 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-13 01:18:51,750 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-13 01:18:51,750 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-13 01:18:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-13 01:18:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-13 01:18:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-13 01:18:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-13 01:18:51,751 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-13 01:18:51,752 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-13 01:18:51,752 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-13 01:18:51,752 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-13 01:18:51,752 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-13 01:18:51,752 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-13 01:18:51,752 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-13 01:18:51,753 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-13 01:18:51,753 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-13 01:18:51,753 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-13 01:18:51,753 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-13 01:18:51,753 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-13 01:18:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-13 01:18:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-13 01:18:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-13 01:18:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-13 01:18:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-13 01:18:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-13 01:18:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-13 01:18:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-13 01:18:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-13 01:18:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-13 01:18:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-13 01:18:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-13 01:18:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-13 01:18:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-13 01:18:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-13 01:18:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-13 01:18:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-13 01:18:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-13 01:18:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-13 01:18:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-13 01:18:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-13 01:18:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-13 01:18:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-10-13 01:18:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 01:18:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 01:18:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 01:18:51,758 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2021-10-13 01:18:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure dll_remove_first [2021-10-13 01:18:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 01:18:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 01:18:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-13 01:18:51,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-13 01:18:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-13 01:18:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 01:18:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 01:18:51,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 01:18:52,068 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-13 01:18:52,298 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 01:18:52,299 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-13 01:18:52,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:18:52 BoogieIcfgContainer [2021-10-13 01:18:52,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 01:18:52,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 01:18:52,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 01:18:52,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 01:18:52,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:18:50" (1/3) ... [2021-10-13 01:18:52,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4118e8d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:18:52, skipping insertion in model container [2021-10-13 01:18:52,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:18:51" (2/3) ... [2021-10-13 01:18:52,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4118e8d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:18:52, skipping insertion in model container [2021-10-13 01:18:52,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:18:52" (3/3) ... [2021-10-13 01:18:52,313 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all.i [2021-10-13 01:18:52,321 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 01:18:52,322 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2021-10-13 01:18:52,374 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 01:18:52,404 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 01:18:52,405 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-10-13 01:18:52,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 71 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 61 states have internal predecessors, (69), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:18:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 01:18:52,436 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:18:52,437 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:18:52,437 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting dll_createErr0REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:18:52,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:18:52,443 INFO L82 PathProgramCache]: Analyzing trace with hash 922136398, now seen corresponding path program 1 times [2021-10-13 01:18:52,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:18:52,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662499251] [2021-10-13 01:18:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:18:52,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:18:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:52,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:18:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:52,783 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 01:18:52,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:18:52,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662499251] [2021-10-13 01:18:52,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662499251] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:18:52,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:18:52,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:18:52,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072123629] [2021-10-13 01:18:52,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:18:52,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:18:52,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:18:52,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:18:52,828 INFO L87 Difference]: Start difference. First operand has 71 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 61 states have internal predecessors, (69), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:18:53,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:18:53,102 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2021-10-13 01:18:53,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:18:53,104 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-13 01:18:53,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:18:53,116 INFO L225 Difference]: With dead ends: 72 [2021-10-13 01:18:53,117 INFO L226 Difference]: Without dead ends: 66 [2021-10-13 01:18:53,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:18:53,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-13 01:18:53,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2021-10-13 01:18:53,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 54 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:18:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-10-13 01:18:53,169 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 11 [2021-10-13 01:18:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:18:53,172 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-10-13 01:18:53,172 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:18:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2021-10-13 01:18:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 01:18:53,174 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:18:53,174 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:18:53,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 01:18:53,175 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting dll_createErr1REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:18:53,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:18:53,176 INFO L82 PathProgramCache]: Analyzing trace with hash 922136399, now seen corresponding path program 1 times [2021-10-13 01:18:53,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:18:53,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166078540] [2021-10-13 01:18:53,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:18:53,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:18:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:53,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:18:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:53,309 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 01:18:53,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:18:53,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166078540] [2021-10-13 01:18:53,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166078540] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:18:53,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:18:53,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:18:53,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749124598] [2021-10-13 01:18:53,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:18:53,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:18:53,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:18:53,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:18:53,315 INFO L87 Difference]: Start difference. First operand 62 states and 65 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:18:53,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:18:53,460 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2021-10-13 01:18:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:18:53,460 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-13 01:18:53,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:18:53,462 INFO L225 Difference]: With dead ends: 63 [2021-10-13 01:18:53,463 INFO L226 Difference]: Without dead ends: 63 [2021-10-13 01:18:53,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:18:53,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-13 01:18:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2021-10-13 01:18:53,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 51 states have internal predecessors, (55), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:18:53,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-10-13 01:18:53,473 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 11 [2021-10-13 01:18:53,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:18:53,489 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-10-13 01:18:53,489 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:18:53,490 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-10-13 01:18:53,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 01:18:53,491 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:18:53,491 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:18:53,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 01:18:53,492 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:18:53,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:18:53,493 INFO L82 PathProgramCache]: Analyzing trace with hash 854735752, now seen corresponding path program 1 times [2021-10-13 01:18:53,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:18:53,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812270755] [2021-10-13 01:18:53,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:18:53,494 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:18:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:53,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:18:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:53,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:18:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:53,627 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 01:18:53,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:18:53,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812270755] [2021-10-13 01:18:53,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812270755] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:18:53,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:18:53,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 01:18:53,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579742759] [2021-10-13 01:18:53,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 01:18:53,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:18:53,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 01:18:53,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:18:53,632 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:18:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:18:53,958 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2021-10-13 01:18:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:18:53,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-10-13 01:18:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:18:53,963 INFO L225 Difference]: With dead ends: 81 [2021-10-13 01:18:53,964 INFO L226 Difference]: Without dead ends: 78 [2021-10-13 01:18:53,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:18:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-13 01:18:53,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-10-13 01:18:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 52 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:18:53,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-10-13 01:18:53,991 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 15 [2021-10-13 01:18:53,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:18:53,991 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-10-13 01:18:53,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:18:53,992 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-10-13 01:18:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 01:18:53,992 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:18:53,993 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:18:53,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 01:18:53,993 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_createErr6REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:18:53,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:18:53,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1920649746, now seen corresponding path program 1 times [2021-10-13 01:18:53,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:18:53,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514507039] [2021-10-13 01:18:53,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:18:53,995 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:18:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:54,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:18:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:54,085 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 01:18:54,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:18:54,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514507039] [2021-10-13 01:18:54,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514507039] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:18:54,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:18:54,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:18:54,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071340127] [2021-10-13 01:18:54,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:18:54,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:18:54,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:18:54,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:18:54,089 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:18:54,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:18:54,252 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-10-13 01:18:54,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:18:54,253 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-13 01:18:54,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:18:54,258 INFO L225 Difference]: With dead ends: 66 [2021-10-13 01:18:54,259 INFO L226 Difference]: Without dead ends: 66 [2021-10-13 01:18:54,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 01:18:54,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-13 01:18:54,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-10-13 01:18:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.564102564102564) internal successors, (61), 57 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:18:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-10-13 01:18:54,279 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 15 [2021-10-13 01:18:54,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:18:54,280 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-10-13 01:18:54,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-13 01:18:54,282 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-10-13 01:18:54,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 01:18:54,284 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:18:54,284 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:18:54,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 01:18:54,285 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:18:54,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:18:54,286 INFO L82 PathProgramCache]: Analyzing trace with hash -822231468, now seen corresponding path program 1 times [2021-10-13 01:18:54,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:18:54,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799320825] [2021-10-13 01:18:54,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:18:54,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:18:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:54,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:18:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:54,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:18:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:18:54,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:18:54,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799320825] [2021-10-13 01:18:54,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799320825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:18:54,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761403982] [2021-10-13 01:18:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:18:54,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:18:54,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:18:54,483 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:18:54,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 01:18:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:54,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 01:18:54,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:18:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:18:54,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761403982] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:18:54,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:18:54,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-10-13 01:18:54,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894289688] [2021-10-13 01:18:54,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 01:18:54,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:18:54,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 01:18:54,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:18:54,907 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 10 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:18:55,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:18:55,291 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-10-13 01:18:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 01:18:55,292 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-10-13 01:18:55,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:18:55,293 INFO L225 Difference]: With dead ends: 88 [2021-10-13 01:18:55,294 INFO L226 Difference]: Without dead ends: 85 [2021-10-13 01:18:55,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:18:55,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-13 01:18:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2021-10-13 01:18:55,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 59 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:18:55,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-10-13 01:18:55,302 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 22 [2021-10-13 01:18:55,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:18:55,303 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-10-13 01:18:55,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:18:55,303 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-10-13 01:18:55,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 01:18:55,304 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:18:55,305 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:18:55,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 01:18:55,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:18:55,525 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_createErr6REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:18:55,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:18:55,526 INFO L82 PathProgramCache]: Analyzing trace with hash 243682526, now seen corresponding path program 1 times [2021-10-13 01:18:55,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:18:55,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685663164] [2021-10-13 01:18:55,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:18:55,527 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:18:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:55,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:18:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:55,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:18:55,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:18:55,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685663164] [2021-10-13 01:18:55,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685663164] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:18:55,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583160128] [2021-10-13 01:18:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:18:55,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:18:55,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:18:55,738 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:18:55,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 01:18:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:55,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:18:55,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:18:56,049 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 01:18:56,104 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-13 01:18:56,105 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 01:18:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:18:56,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583160128] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:18:56,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:18:56,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-13 01:18:56,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843297461] [2021-10-13 01:18:56,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 01:18:56,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:18:56,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 01:18:56,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-13 01:18:56,288 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 01:18:56,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:18:56,487 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-10-13 01:18:56,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:18:56,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 22 [2021-10-13 01:18:56,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:18:56,488 INFO L225 Difference]: With dead ends: 66 [2021-10-13 01:18:56,489 INFO L226 Difference]: Without dead ends: 66 [2021-10-13 01:18:56,489 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:18:56,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-13 01:18:56,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-13 01:18:56,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 58 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:18:56,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-10-13 01:18:56,494 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 22 [2021-10-13 01:18:56,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:18:56,495 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-10-13 01:18:56,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 01:18:56,495 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-10-13 01:18:56,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 01:18:56,496 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:18:56,496 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:18:56,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-13 01:18:56,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-13 01:18:56,710 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_createErr7REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:18:56,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:18:56,711 INFO L82 PathProgramCache]: Analyzing trace with hash 243682527, now seen corresponding path program 1 times [2021-10-13 01:18:56,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:18:56,711 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345209126] [2021-10-13 01:18:56,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:18:56,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:18:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:56,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:18:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:18:56,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:18:56,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345209126] [2021-10-13 01:18:56,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345209126] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:18:56,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975623554] [2021-10-13 01:18:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:18:56,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:18:56,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:18:56,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:18:56,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 01:18:56,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:57,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 01:18:57,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:18:57,058 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 01:18:57,068 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 01:18:57,220 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 01:18:57,221 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 01:18:57,237 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:18:57,237 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 01:18:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:18:57,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975623554] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:18:57,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:18:57,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-13 01:18:57,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993339832] [2021-10-13 01:18:57,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 01:18:57,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:18:57,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 01:18:57,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:18:57,385 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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 01:18:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:18:57,564 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-10-13 01:18:57,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:18:57,565 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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 22 [2021-10-13 01:18:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:18:57,566 INFO L225 Difference]: With dead ends: 65 [2021-10-13 01:18:57,566 INFO L226 Difference]: Without dead ends: 65 [2021-10-13 01:18:57,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:18:57,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-13 01:18:57,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-13 01:18:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 57 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:18:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-10-13 01:18:57,570 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 22 [2021-10-13 01:18:57,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:18:57,570 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-10-13 01:18:57,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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 01:18:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-10-13 01:18:57,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 01:18:57,572 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:18:57,572 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:18:57,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 01:18:57,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:18:57,784 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:18:57,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:18:57,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1060389368, now seen corresponding path program 2 times [2021-10-13 01:18:57,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:18:57,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261401508] [2021-10-13 01:18:57,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:18:57,785 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:18:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:57,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:18:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:57,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:18:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:18:57,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:18:57,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261401508] [2021-10-13 01:18:57,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261401508] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:18:57,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551726287] [2021-10-13 01:18:57,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:18:57,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:18:57,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:18:57,978 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:18:57,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 01:18:58,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 01:18:58,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:18:58,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 01:18:58,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:18:58,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 01:18:58,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551726287] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:18:58,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 01:18:58,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-10-13 01:18:58,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118213531] [2021-10-13 01:18:58,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:18:58,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:18:58,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:18:58,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:18:58,258 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:18:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:18:58,290 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-10-13 01:18:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:18:58,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-10-13 01:18:58,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:18:58,295 INFO L225 Difference]: With dead ends: 68 [2021-10-13 01:18:58,295 INFO L226 Difference]: Without dead ends: 68 [2021-10-13 01:18:58,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:18:58,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-13 01:18:58,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-10-13 01:18:58,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 58 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:18:58,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-10-13 01:18:58,312 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 29 [2021-10-13 01:18:58,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:18:58,314 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-10-13 01:18:58,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:18:58,314 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-10-13 01:18:58,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 01:18:58,317 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:18:58,317 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:18:58,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 01:18:58,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:18:58,534 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_remove_firstErr0REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:18:58,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:18:58,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1126814843, now seen corresponding path program 1 times [2021-10-13 01:18:58,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:18:58,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025259044] [2021-10-13 01:18:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:18:58,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:18:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:58,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:18:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:58,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:18:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:58,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:18:58,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:18:58,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025259044] [2021-10-13 01:18:58,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025259044] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:18:58,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682653130] [2021-10-13 01:18:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:18:58,670 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:18:58,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:18:58,678 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:18:58,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 01:18:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:58,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 01:18:58,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:18:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:18:58,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682653130] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:18:58,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:18:58,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2021-10-13 01:18:58,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015995241] [2021-10-13 01:18:58,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 01:18:58,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:18:58,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:18:58,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:18:58,995 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:18:59,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:18:59,204 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-10-13 01:18:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:18:59,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2021-10-13 01:18:59,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:18:59,206 INFO L225 Difference]: With dead ends: 75 [2021-10-13 01:18:59,206 INFO L226 Difference]: Without dead ends: 75 [2021-10-13 01:18:59,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:18:59,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-13 01:18:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2021-10-13 01:18:59,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 58 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:18:59,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-10-13 01:18:59,211 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 31 [2021-10-13 01:18:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:18:59,211 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-10-13 01:18:59,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:18:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-10-13 01:18:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 01:18:59,212 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:18:59,212 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] [2021-10-13 01:18:59,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 01:18:59,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:18:59,426 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_remove_firstErr0REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:18:59,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:18:59,426 INFO L82 PathProgramCache]: Analyzing trace with hash 277523133, now seen corresponding path program 1 times [2021-10-13 01:18:59,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:18:59,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086061208] [2021-10-13 01:18:59,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:18:59,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:18:59,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:59,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:18:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:59,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:18:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:18:59,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:18:59,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086061208] [2021-10-13 01:18:59,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086061208] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:18:59,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150972269] [2021-10-13 01:18:59,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:18:59,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:18:59,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:18:59,748 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:18:59,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 01:18:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:18:59,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 01:18:59,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:18:59,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 01:18:59,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-10-13 01:19:00,566 INFO L354 Elim1Store]: treesize reduction 50, result has 9.1 percent of original size [2021-10-13 01:19:00,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 24 [2021-10-13 01:19:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:00,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150972269] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:00,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:19:00,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-10-13 01:19:00,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394608755] [2021-10-13 01:19:00,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 01:19:00,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:00,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 01:19:00,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-10-13 01:19:00,802 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 21 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 17 states have internal predecessors, (51), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:19:02,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:02,074 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2021-10-13 01:19:02,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 01:19:02,075 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 17 states have internal predecessors, (51), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-10-13 01:19:02,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:02,077 INFO L225 Difference]: With dead ends: 114 [2021-10-13 01:19:02,077 INFO L226 Difference]: Without dead ends: 114 [2021-10-13 01:19:02,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 785.6ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 01:19:02,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-13 01:19:02,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 81. [2021-10-13 01:19:02,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 71 states have internal predecessors, (76), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:19:02,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-10-13 01:19:02,084 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 32 [2021-10-13 01:19:02,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:02,084 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-10-13 01:19:02,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 17 states have internal predecessors, (51), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:19:02,085 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-10-13 01:19:02,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 01:19:02,086 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:02,086 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] [2021-10-13 01:19:02,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 01:19:02,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 01:19:02,287 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting dll_remove_firstErr1REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:19:02,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:02,287 INFO L82 PathProgramCache]: Analyzing trace with hash 277523134, now seen corresponding path program 1 times [2021-10-13 01:19:02,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:02,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217930457] [2021-10-13 01:19:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:02,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:02,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:19:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:02,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:19:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:02,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:02,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217930457] [2021-10-13 01:19:02,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217930457] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:02,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824574088] [2021-10-13 01:19:02,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:02,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:19:02,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:19:02,810 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:19:02,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 01:19:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:03,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 01:19:03,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:19:03,093 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 01:19:03,116 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 01:19:03,740 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-13 01:19:03,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-10-13 01:19:03,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:03,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824574088] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:03,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:19:03,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2021-10-13 01:19:03,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786911783] [2021-10-13 01:19:03,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 01:19:03,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:03,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 01:19:03,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-13 01:19:03,965 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:19:05,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:05,038 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2021-10-13 01:19:05,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 01:19:05,039 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2021-10-13 01:19:05,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:05,040 INFO L225 Difference]: With dead ends: 126 [2021-10-13 01:19:05,040 INFO L226 Difference]: Without dead ends: 126 [2021-10-13 01:19:05,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 715.6ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-10-13 01:19:05,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-13 01:19:05,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2021-10-13 01:19:05,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.4366197183098592) internal successors, (102), 86 states have internal predecessors, (102), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-10-13 01:19:05,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2021-10-13 01:19:05,048 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 32 [2021-10-13 01:19:05,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:05,048 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2021-10-13 01:19:05,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:19:05,049 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2021-10-13 01:19:05,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 01:19:05,050 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:05,050 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] [2021-10-13 01:19:05,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 01:19:05,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-13 01:19:05,270 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting dll_remove_firstErr2REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:19:05,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:05,270 INFO L82 PathProgramCache]: Analyzing trace with hash 13282519, now seen corresponding path program 1 times [2021-10-13 01:19:05,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:05,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252074210] [2021-10-13 01:19:05,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:05,271 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:05,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:19:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:05,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:19:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 01:19:05,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:05,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252074210] [2021-10-13 01:19:05,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252074210] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:19:05,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:19:05,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-13 01:19:05,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022388589] [2021-10-13 01:19:05,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 01:19:05,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:05,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 01:19:05,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:19:05,431 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:19:05,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:05,989 INFO L93 Difference]: Finished difference Result 138 states and 166 transitions. [2021-10-13 01:19:05,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 01:19:05,990 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-10-13 01:19:05,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:05,991 INFO L225 Difference]: With dead ends: 138 [2021-10-13 01:19:05,991 INFO L226 Difference]: Without dead ends: 138 [2021-10-13 01:19:05,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-10-13 01:19:05,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-13 01:19:05,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 103. [2021-10-13 01:19:05,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.4666666666666666) internal successors, (110), 90 states have internal predecessors, (110), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-13 01:19:05,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2021-10-13 01:19:05,998 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 33 [2021-10-13 01:19:05,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:05,998 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2021-10-13 01:19:05,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:19:05,998 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2021-10-13 01:19:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 01:19:05,999 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:05,999 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] [2021-10-13 01:19:06,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-13 01:19:06,000 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting dll_remove_firstErr3REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:19:06,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:06,000 INFO L82 PathProgramCache]: Analyzing trace with hash 13282520, now seen corresponding path program 1 times [2021-10-13 01:19:06,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:06,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240176693] [2021-10-13 01:19:06,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:06,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:06,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:06,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:19:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:06,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:19:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:19:06,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:06,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240176693] [2021-10-13 01:19:06,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240176693] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:19:06,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:19:06,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-13 01:19:06,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369026495] [2021-10-13 01:19:06,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 01:19:06,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:06,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 01:19:06,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:19:06,203 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:19:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:06,769 INFO L93 Difference]: Finished difference Result 141 states and 169 transitions. [2021-10-13 01:19:06,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 01:19:06,770 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-10-13 01:19:06,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:06,771 INFO L225 Difference]: With dead ends: 141 [2021-10-13 01:19:06,771 INFO L226 Difference]: Without dead ends: 141 [2021-10-13 01:19:06,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 286.1ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-10-13 01:19:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-13 01:19:06,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2021-10-13 01:19:06,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.44) internal successors, (108), 90 states have internal predecessors, (108), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-13 01:19:06,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2021-10-13 01:19:06,777 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 33 [2021-10-13 01:19:06,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:06,777 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2021-10-13 01:19:06,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:19:06,777 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2021-10-13 01:19:06,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 01:19:06,778 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:06,778 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] [2021-10-13 01:19:06,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-13 01:19:06,779 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting dll_remove_firstErr4REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:19:06,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:06,779 INFO L82 PathProgramCache]: Analyzing trace with hash 562523457, now seen corresponding path program 1 times [2021-10-13 01:19:06,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:06,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555185538] [2021-10-13 01:19:06,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:06,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:06,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:06,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:19:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:06,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:19:06,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:07,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:07,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555185538] [2021-10-13 01:19:07,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555185538] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:07,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394033711] [2021-10-13 01:19:07,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:07,160 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:19:07,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:19:07,161 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:19:07,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 01:19:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:07,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-13 01:19:07,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:19:07,450 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 01:19:07,477 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:19:07,478 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 01:19:07,505 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 13 treesize of output 9 [2021-10-13 01:19:07,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2021-10-13 01:19:07,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:07,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:07,565 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 18 treesize of output 22 [2021-10-13 01:19:07,574 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 13 treesize of output 9 [2021-10-13 01:19:07,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:07,691 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-13 01:19:07,692 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 3 case distinctions, treesize of input 90 treesize of output 65 [2021-10-13 01:19:07,719 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-10-13 01:19:07,720 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 80 treesize of output 73 [2021-10-13 01:19:08,747 INFO L354 Elim1Store]: treesize reduction 106, result has 2.8 percent of original size [2021-10-13 01:19:08,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 131 treesize of output 64 [2021-10-13 01:19:08,757 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-10-13 01:19:08,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 27 [2021-10-13 01:19:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:08,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394033711] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:08,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:19:08,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-10-13 01:19:08,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884910096] [2021-10-13 01:19:08,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 01:19:08,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:08,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 01:19:08,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-10-13 01:19:08,777 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 22 states have internal predecessors, (48), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:19:10,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:10,799 INFO L93 Difference]: Finished difference Result 136 states and 162 transitions. [2021-10-13 01:19:10,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 01:19:10,800 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 22 states have internal predecessors, (48), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-10-13 01:19:10,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:10,801 INFO L225 Difference]: With dead ends: 136 [2021-10-13 01:19:10,801 INFO L226 Difference]: Without dead ends: 136 [2021-10-13 01:19:10,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1774.6ms TimeCoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2021-10-13 01:19:10,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-13 01:19:10,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2021-10-13 01:19:10,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 81 states have (on average 1.4567901234567902) internal successors, (118), 96 states have internal predecessors, (118), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-13 01:19:10,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-10-13 01:19:10,810 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 36 [2021-10-13 01:19:10,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:10,811 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-10-13 01:19:10,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 22 states have internal predecessors, (48), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:19:10,811 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-10-13 01:19:10,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 01:19:10,812 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:10,812 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] [2021-10-13 01:19:10,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 01:19:11,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-13 01:19:11,018 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting dll_remove_firstErr5REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:19:11,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:11,018 INFO L82 PathProgramCache]: Analyzing trace with hash 562523458, now seen corresponding path program 1 times [2021-10-13 01:19:11,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:11,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946308871] [2021-10-13 01:19:11,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:11,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:11,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:19:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:11,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:19:11,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:11,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:11,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946308871] [2021-10-13 01:19:11,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946308871] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:11,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129672930] [2021-10-13 01:19:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:11,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:19:11,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:19:11,626 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:19:11,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 01:19:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:12,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-13 01:19:12,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:19:12,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-10-13 01:19:12,268 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:19:12,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-13 01:19:12,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 01:19:12,375 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 13 treesize of output 9 [2021-10-13 01:19:12,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:12,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 01:19:12,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:12,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 01:19:12,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:12,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:19:12,645 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-13 01:19:12,645 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 105 treesize of output 74 [2021-10-13 01:19:12,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:19:12,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:12,664 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-13 01:19:12,664 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 91 [2021-10-13 01:19:13,746 INFO L354 Elim1Store]: treesize reduction 65, result has 11.0 percent of original size [2021-10-13 01:19:13,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 134 treesize of output 73 [2021-10-13 01:19:13,773 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-10-13 01:19:13,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 37 [2021-10-13 01:19:13,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:13,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129672930] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:13,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:19:13,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-10-13 01:19:13,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285557800] [2021-10-13 01:19:13,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 01:19:13,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:13,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 01:19:13,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 01:19:13,910 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 29 states have internal predecessors, (59), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:19:18,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:18,022 INFO L93 Difference]: Finished difference Result 143 states and 165 transitions. [2021-10-13 01:19:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 01:19:18,026 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 29 states have internal predecessors, (59), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-10-13 01:19:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:18,028 INFO L225 Difference]: With dead ends: 143 [2021-10-13 01:19:18,028 INFO L226 Difference]: Without dead ends: 143 [2021-10-13 01:19:18,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3895.4ms TimeCoverageRelationStatistics Valid=348, Invalid=2958, Unknown=0, NotChecked=0, Total=3306 [2021-10-13 01:19:18,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-13 01:19:18,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 123. [2021-10-13 01:19:18,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 93 states have (on average 1.4623655913978495) internal successors, (136), 110 states have internal predecessors, (136), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-13 01:19:18,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2021-10-13 01:19:18,038 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 36 [2021-10-13 01:19:18,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:18,038 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2021-10-13 01:19:18,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 29 states have internal predecessors, (59), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-13 01:19:18,039 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2021-10-13 01:19:18,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 01:19:18,040 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:18,040 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] [2021-10-13 01:19:18,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 01:19:18,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-13 01:19:18,266 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting dll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:19:18,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:18,266 INFO L82 PathProgramCache]: Analyzing trace with hash -580837085, now seen corresponding path program 1 times [2021-10-13 01:19:18,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:18,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632519459] [2021-10-13 01:19:18,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:18,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:18,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:19:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:18,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:19:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:19:18,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:18,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632519459] [2021-10-13 01:19:18,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632519459] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:19:18,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:19:18,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-13 01:19:18,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53230897] [2021-10-13 01:19:18,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 01:19:18,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:18,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 01:19:18,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:19:18,481 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:19:19,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:19,056 INFO L93 Difference]: Finished difference Result 142 states and 163 transitions. [2021-10-13 01:19:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 01:19:19,056 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2021-10-13 01:19:19,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:19,058 INFO L225 Difference]: With dead ends: 142 [2021-10-13 01:19:19,058 INFO L226 Difference]: Without dead ends: 142 [2021-10-13 01:19:19,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 341.0ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-10-13 01:19:19,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-13 01:19:19,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 123. [2021-10-13 01:19:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 93 states have (on average 1.4408602150537635) internal successors, (134), 110 states have internal predecessors, (134), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-13 01:19:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2021-10-13 01:19:19,065 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 38 [2021-10-13 01:19:19,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:19,066 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2021-10-13 01:19:19,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:19:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2021-10-13 01:19:19,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 01:19:19,067 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:19,068 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] [2021-10-13 01:19:19,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-13 01:19:19,068 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting dll_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:19:19,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:19,069 INFO L82 PathProgramCache]: Analyzing trace with hash -826080384, now seen corresponding path program 1 times [2021-10-13 01:19:19,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:19,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266285562] [2021-10-13 01:19:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:19,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:19,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:19:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:19,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:19:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:19,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:19:19,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:19,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266285562] [2021-10-13 01:19:19,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266285562] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:19:19,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:19:19,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-13 01:19:19,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701210661] [2021-10-13 01:19:19,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 01:19:19,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:19,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 01:19:19,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-10-13 01:19:19,369 INFO L87 Difference]: Start difference. First operand 123 states and 148 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:19:20,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:20,017 INFO L93 Difference]: Finished difference Result 141 states and 161 transitions. [2021-10-13 01:19:20,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 01:19:20,018 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-10-13 01:19:20,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:20,019 INFO L225 Difference]: With dead ends: 141 [2021-10-13 01:19:20,019 INFO L226 Difference]: Without dead ends: 141 [2021-10-13 01:19:20,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 444.3ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-10-13 01:19:20,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-13 01:19:20,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 123. [2021-10-13 01:19:20,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 93 states have (on average 1.4193548387096775) internal successors, (132), 110 states have internal predecessors, (132), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-13 01:19:20,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2021-10-13 01:19:20,029 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 39 [2021-10-13 01:19:20,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:20,030 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2021-10-13 01:19:20,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-13 01:19:20,030 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2021-10-13 01:19:20,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 01:19:20,031 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:20,032 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 01:19:20,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-13 01:19:20,032 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting dll_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:19:20,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:20,033 INFO L82 PathProgramCache]: Analyzing trace with hash 161311941, now seen corresponding path program 1 times [2021-10-13 01:19:20,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:20,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061752508] [2021-10-13 01:19:20,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:20,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:20,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:19:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:20,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:19:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:20,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 01:19:20,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:20,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061752508] [2021-10-13 01:19:20,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061752508] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:19:20,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:19:20,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-13 01:19:20,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554442674] [2021-10-13 01:19:20,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 01:19:20,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:20,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 01:19:20,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:19:20,264 INFO L87 Difference]: Start difference. First operand 123 states and 146 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:19:20,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:20,912 INFO L93 Difference]: Finished difference Result 138 states and 159 transitions. [2021-10-13 01:19:20,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 01:19:20,913 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-10-13 01:19:20,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:20,914 INFO L225 Difference]: With dead ends: 138 [2021-10-13 01:19:20,915 INFO L226 Difference]: Without dead ends: 138 [2021-10-13 01:19:20,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 319.5ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-10-13 01:19:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-13 01:19:20,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 123. [2021-10-13 01:19:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 93 states have (on average 1.3978494623655915) internal successors, (130), 110 states have internal predecessors, (130), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-13 01:19:20,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 144 transitions. [2021-10-13 01:19:20,921 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 144 transitions. Word has length 40 [2021-10-13 01:19:20,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:20,922 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 144 transitions. [2021-10-13 01:19:20,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-13 01:19:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 144 transitions. [2021-10-13 01:19:20,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 01:19:20,924 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:20,924 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:19:20,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-13 01:19:20,925 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting dll_remove_firstErr0REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:19:20,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:20,926 INFO L82 PathProgramCache]: Analyzing trace with hash 649158825, now seen corresponding path program 2 times [2021-10-13 01:19:20,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:20,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567911985] [2021-10-13 01:19:20,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:20,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:20,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:19:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:21,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:19:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:21,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:21,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567911985] [2021-10-13 01:19:21,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567911985] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:21,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021862521] [2021-10-13 01:19:21,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 01:19:21,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:19:21,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:19:21,080 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:19:21,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 01:19:21,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 01:19:21,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 01:19:21,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 01:19:21,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:19:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:21,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021862521] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:21,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:19:21,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2021-10-13 01:19:21,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653295362] [2021-10-13 01:19:21,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:19:21,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:21,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:19:21,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:19:21,595 INFO L87 Difference]: Start difference. First operand 123 states and 144 transitions. Second operand has 11 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:19:21,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:21,834 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2021-10-13 01:19:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 01:19:21,834 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2021-10-13 01:19:21,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:21,835 INFO L225 Difference]: With dead ends: 93 [2021-10-13 01:19:21,835 INFO L226 Difference]: Without dead ends: 82 [2021-10-13 01:19:21,836 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-13 01:19:21,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-13 01:19:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2021-10-13 01:19:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 66 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:19:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-10-13 01:19:21,838 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 40 [2021-10-13 01:19:21,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:21,839 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-10-13 01:19:21,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-13 01:19:21,839 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-10-13 01:19:21,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-13 01:19:21,839 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:21,840 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] [2021-10-13 01:19:21,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 01:19:22,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:19:22,050 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting dll_remove_firstErr11REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:19:22,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:22,050 INFO L82 PathProgramCache]: Analyzing trace with hash 705702947, now seen corresponding path program 1 times [2021-10-13 01:19:22,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:22,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414548401] [2021-10-13 01:19:22,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:22,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:22,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:19:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:22,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:19:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 01:19:22,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:22,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414548401] [2021-10-13 01:19:22,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414548401] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:19:22,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:19:22,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-13 01:19:22,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906924049] [2021-10-13 01:19:22,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 01:19:22,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:22,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 01:19:22,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-13 01:19:22,206 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 2 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 01:19:22,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:22,655 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2021-10-13 01:19:22,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 01:19:22,656 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 2 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 41 [2021-10-13 01:19:22,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:22,657 INFO L225 Difference]: With dead ends: 81 [2021-10-13 01:19:22,657 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 01:19:22,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 305.4ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-10-13 01:19:22,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 01:19:22,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-10-13 01:19:22,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 65 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:19:22,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-10-13 01:19:22,662 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 41 [2021-10-13 01:19:22,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:22,663 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-10-13 01:19:22,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 2 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 01:19:22,663 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-10-13 01:19:22,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-13 01:19:22,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:22,664 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] [2021-10-13 01:19:22,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-13 01:19:22,665 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:19:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:22,665 INFO L82 PathProgramCache]: Analyzing trace with hash -237952112, now seen corresponding path program 1 times [2021-10-13 01:19:22,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:22,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622752031] [2021-10-13 01:19:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:22,667 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:22,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:19:22,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:22,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:19:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:22,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 01:19:22,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 01:19:22,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:22,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622752031] [2021-10-13 01:19:22,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622752031] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:19:22,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:19:22,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-13 01:19:22,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365453222] [2021-10-13 01:19:22,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 01:19:22,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:22,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 01:19:22,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:19:22,811 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 01:19:23,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:23,121 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-10-13 01:19:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 01:19:23,122 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2021-10-13 01:19:23,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:23,123 INFO L225 Difference]: With dead ends: 79 [2021-10-13 01:19:23,123 INFO L226 Difference]: Without dead ends: 79 [2021-10-13 01:19:23,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 193.2ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-13 01:19:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-13 01:19:23,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2021-10-13 01:19:23,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 63 states have internal predecessors, (64), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:19:23,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-10-13 01:19:23,127 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 46 [2021-10-13 01:19:23,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:23,128 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-10-13 01:19:23,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 01:19:23,128 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-10-13 01:19:23,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-13 01:19:23,129 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:23,129 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] [2021-10-13 01:19:23,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-13 01:19:23,129 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_LEAK === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:19:23,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:23,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1038711118, now seen corresponding path program 1 times [2021-10-13 01:19:23,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:23,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519889891] [2021-10-13 01:19:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:23,132 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:23,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:19:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:23,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:19:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:23,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 01:19:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 01:19:23,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:23,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519889891] [2021-10-13 01:19:23,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519889891] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:23,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093718785] [2021-10-13 01:19:23,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:23,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:19:23,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:19:23,266 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:19:23,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 01:19:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:23,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 01:19:23,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:19:23,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 01:19:23,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093718785] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:23,876 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:19:23,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2021-10-13 01:19:23,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289202267] [2021-10-13 01:19:23,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:19:23,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:23,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:19:23,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:19:23,878 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:19:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:24,001 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2021-10-13 01:19:24,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 01:19:24,008 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 48 [2021-10-13 01:19:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:24,009 INFO L225 Difference]: With dead ends: 81 [2021-10-13 01:19:24,009 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 01:19:24,009 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:19:24,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 01:19:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-10-13 01:19:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 64 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:19:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-10-13 01:19:24,013 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 48 [2021-10-13 01:19:24,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:24,013 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-10-13 01:19:24,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:19:24,013 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-10-13 01:19:24,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-13 01:19:24,014 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:24,014 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] [2021-10-13 01:19:24,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 01:19:24,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:19:24,238 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting dll_remove_firstErr2REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:19:24,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:24,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2131651961, now seen corresponding path program 1 times [2021-10-13 01:19:24,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:24,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933332394] [2021-10-13 01:19:24,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:24,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:24,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:19:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:24,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:19:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:24,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 01:19:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:25,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:25,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933332394] [2021-10-13 01:19:25,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933332394] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:25,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130792115] [2021-10-13 01:19:25,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:25,268 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:19:25,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:19:25,269 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:19:25,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 01:19:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:25,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-13 01:19:25,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:19:25,723 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 01:19:26,064 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 01:19:26,071 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 01:19:26,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:26,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 01:19:26,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:26,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 01:19:26,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:26,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:19:26,341 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-13 01:19:26,341 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 99 treesize of output 74 [2021-10-13 01:19:26,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:26,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:19:26,355 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-13 01:19:26,360 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 85 [2021-10-13 01:19:26,722 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-10-13 01:19:26,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-10-13 01:19:27,879 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 01:19:27,879 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 16 treesize of output 26 [2021-10-13 01:19:28,309 INFO L354 Elim1Store]: treesize reduction 271, result has 11.4 percent of original size [2021-10-13 01:19:28,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 504 treesize of output 236 [2021-10-13 01:19:28,336 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-10-13 01:19:28,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 244 treesize of output 178 [2021-10-13 01:19:29,167 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-13 01:19:29,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 38 [2021-10-13 01:19:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:29,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130792115] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:29,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:19:29,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2021-10-13 01:19:29,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656060299] [2021-10-13 01:19:29,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-13 01:19:29,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:29,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-13 01:19:29,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2406, Unknown=0, NotChecked=0, Total=2550 [2021-10-13 01:19:29,278 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 51 states, 49 states have (on average 1.653061224489796) internal successors, (81), 43 states have internal predecessors, (81), 6 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:19:32,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:32,645 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2021-10-13 01:19:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 01:19:32,649 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 1.653061224489796) internal successors, (81), 43 states have internal predecessors, (81), 6 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 49 [2021-10-13 01:19:32,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:32,650 INFO L225 Difference]: With dead ends: 101 [2021-10-13 01:19:32,650 INFO L226 Difference]: Without dead ends: 101 [2021-10-13 01:19:32,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 4368.5ms TimeCoverageRelationStatistics Valid=449, Invalid=5251, Unknown=0, NotChecked=0, Total=5700 [2021-10-13 01:19:32,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-13 01:19:32,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2021-10-13 01:19:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 67 states have internal predecessors, (70), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:19:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-10-13 01:19:32,665 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 49 [2021-10-13 01:19:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:32,666 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-10-13 01:19:32,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 1.653061224489796) internal successors, (81), 43 states have internal predecessors, (81), 6 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:19:32,667 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-10-13 01:19:32,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-13 01:19:32,667 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:32,668 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] [2021-10-13 01:19:32,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 01:19:32,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-13 01:19:32,894 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting dll_remove_firstErr3REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:19:32,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:32,894 INFO L82 PathProgramCache]: Analyzing trace with hash -2131651960, now seen corresponding path program 1 times [2021-10-13 01:19:32,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:32,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000425559] [2021-10-13 01:19:32,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:32,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:33,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:19:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:33,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:19:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:33,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 01:19:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:33,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:33,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000425559] [2021-10-13 01:19:33,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000425559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:33,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318736839] [2021-10-13 01:19:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:33,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:19:33,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:19:33,708 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:19:33,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 01:19:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:34,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 72 conjunts are in the unsatisfiable core [2021-10-13 01:19:34,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:19:34,168 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 01:19:34,237 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:19:34,238 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 01:19:34,279 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 13 treesize of output 9 [2021-10-13 01:19:34,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:34,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 01:19:34,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:19:34,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:34,458 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-13 01:19:34,458 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-10-13 01:19:35,472 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 33 treesize of output 29 [2021-10-13 01:19:35,478 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 21 [2021-10-13 01:19:35,573 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 107 treesize of output 87 [2021-10-13 01:19:35,593 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-10-13 01:19:35,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 87 treesize of output 53 [2021-10-13 01:19:35,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-10-13 01:19:35,809 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 26 treesize of output 14 [2021-10-13 01:19:35,851 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:35,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318736839] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:35,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:19:35,851 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 42 [2021-10-13 01:19:35,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167842698] [2021-10-13 01:19:35,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-13 01:19:35,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:35,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-13 01:19:35,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1687, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 01:19:35,853 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 43 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 35 states have internal predecessors, (74), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:19:38,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:38,609 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2021-10-13 01:19:38,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 01:19:38,610 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 35 states have internal predecessors, (74), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 49 [2021-10-13 01:19:38,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:38,611 INFO L225 Difference]: With dead ends: 118 [2021-10-13 01:19:38,611 INFO L226 Difference]: Without dead ends: 118 [2021-10-13 01:19:38,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 2813.8ms TimeCoverageRelationStatistics Valid=424, Invalid=4406, Unknown=0, NotChecked=0, Total=4830 [2021-10-13 01:19:38,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-13 01:19:38,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2021-10-13 01:19:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 83 states have internal predecessors, (90), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-10-13 01:19:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2021-10-13 01:19:38,618 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 49 [2021-10-13 01:19:38,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:38,618 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2021-10-13 01:19:38,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 35 states have internal predecessors, (74), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:19:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2021-10-13 01:19:38,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 01:19:38,620 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:38,620 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] [2021-10-13 01:19:38,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-13 01:19:38,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-13 01:19:38,834 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting dll_remove_firstErr4REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:19:38,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:38,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1342859665, now seen corresponding path program 1 times [2021-10-13 01:19:38,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:38,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076441510] [2021-10-13 01:19:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:38,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:39,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:19:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:39,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:19:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:40,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 01:19:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:41,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:41,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076441510] [2021-10-13 01:19:41,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076441510] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:41,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558458795] [2021-10-13 01:19:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:41,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:19:41,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:19:41,202 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:19:41,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 01:19:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:41,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 104 conjunts are in the unsatisfiable core [2021-10-13 01:19:41,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:19:41,700 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 01:19:42,006 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 01:19:42,012 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 01:19:42,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:42,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 01:19:42,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:42,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 01:19:42,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:42,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-10-13 01:19:42,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:42,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-10-13 01:19:42,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:42,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-10-13 01:19:42,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:42,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-10-13 01:19:42,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:42,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:42,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-10-13 01:19:42,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:42,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:42,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-10-13 01:19:43,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:43,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:19:43,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:19:43,171 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-13 01:19:43,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 151 treesize of output 101 [2021-10-13 01:19:43,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:43,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:19:43,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:19:43,187 INFO L354 Elim1Store]: treesize reduction 59, result has 13.2 percent of original size [2021-10-13 01:19:43,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 128 treesize of output 117 [2021-10-13 01:19:43,629 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-10-13 01:19:43,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-10-13 01:19:45,249 INFO L354 Elim1Store]: treesize reduction 321, result has 11.6 percent of original size [2021-10-13 01:19:45,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 436 treesize of output 209 [2021-10-13 01:19:45,337 INFO L354 Elim1Store]: treesize reduction 349, result has 10.3 percent of original size [2021-10-13 01:19:45,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 210 treesize of output 147 [2021-10-13 01:19:46,260 INFO L354 Elim1Store]: treesize reduction 99, result has 7.5 percent of original size [2021-10-13 01:19:46,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 142 treesize of output 93 [2021-10-13 01:19:46,278 INFO L354 Elim1Store]: treesize reduction 66, result has 4.3 percent of original size [2021-10-13 01:19:46,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 46 [2021-10-13 01:19:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:46,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558458795] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:46,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:19:46,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 57 [2021-10-13 01:19:46,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613372554] [2021-10-13 01:19:46,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-10-13 01:19:46,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:46,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-10-13 01:19:46,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3049, Unknown=0, NotChecked=0, Total=3192 [2021-10-13 01:19:46,301 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 57 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 48 states have internal predecessors, (84), 7 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:19:54,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:19:54,458 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-10-13 01:19:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 01:19:54,459 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 48 states have internal predecessors, (84), 7 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 52 [2021-10-13 01:19:54,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:19:54,460 INFO L225 Difference]: With dead ends: 100 [2021-10-13 01:19:54,460 INFO L226 Difference]: Without dead ends: 100 [2021-10-13 01:19:54,464 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 8773.9ms TimeCoverageRelationStatistics Valid=467, Invalid=7543, Unknown=0, NotChecked=0, Total=8010 [2021-10-13 01:19:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-13 01:19:54,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 87. [2021-10-13 01:19:54,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 76 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:19:54,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2021-10-13 01:19:54,469 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 52 [2021-10-13 01:19:54,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:19:54,469 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2021-10-13 01:19:54,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 48 states have internal predecessors, (84), 7 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-10-13 01:19:54,470 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2021-10-13 01:19:54,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-13 01:19:54,470 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:19:54,471 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] [2021-10-13 01:19:54,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 01:19:54,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-13 01:19:54,686 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting dll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:19:54,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:19:54,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1321018351, now seen corresponding path program 1 times [2021-10-13 01:19:54,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:19:54,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595411624] [2021-10-13 01:19:54,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:54,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:19:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:54,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:19:54,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:54,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:19:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:55,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 01:19:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:55,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:19:55,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595411624] [2021-10-13 01:19:55,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595411624] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:55,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622416449] [2021-10-13 01:19:55,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:19:55,382 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:19:55,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:19:55,383 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:19:55,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 01:19:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:19:56,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-13 01:19:56,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:19:56,124 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 01:19:56,181 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:19:56,182 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 01:19:56,216 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 13 treesize of output 9 [2021-10-13 01:19:56,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:56,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 01:19:56,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:19:56,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-13 01:19:56,366 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-13 01:19:56,366 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-10-13 01:19:57,156 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 21 [2021-10-13 01:19:57,227 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 82 treesize of output 66 [2021-10-13 01:19:57,246 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-10-13 01:19:57,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 42 [2021-10-13 01:19:57,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 01:19:57,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:19:57,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622416449] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:19:57,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:19:57,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 40 [2021-10-13 01:19:57,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899739083] [2021-10-13 01:19:57,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-13 01:19:57,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:19:57,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-13 01:19:57,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 01:19:57,421 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 41 states, 39 states have (on average 2.076923076923077) internal successors, (81), 33 states have internal predecessors, (81), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:20:00,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:00,553 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2021-10-13 01:20:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-13 01:20:00,553 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.076923076923077) internal successors, (81), 33 states have internal predecessors, (81), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 53 [2021-10-13 01:20:00,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:00,554 INFO L225 Difference]: With dead ends: 128 [2021-10-13 01:20:00,554 INFO L226 Difference]: Without dead ends: 128 [2021-10-13 01:20:00,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 3157.9ms TimeCoverageRelationStatistics Valid=647, Invalid=5515, Unknown=0, NotChecked=0, Total=6162 [2021-10-13 01:20:00,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-13 01:20:00,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2021-10-13 01:20:00,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 92 states have internal predecessors, (103), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-13 01:20:00,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2021-10-13 01:20:00,560 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 53 [2021-10-13 01:20:00,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:00,561 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2021-10-13 01:20:00,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.076923076923077) internal successors, (81), 33 states have internal predecessors, (81), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:20:00,561 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2021-10-13 01:20:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-13 01:20:00,562 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:20:00,562 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] [2021-10-13 01:20:00,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 01:20:00,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-13 01:20:00,790 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting dll_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:20:00,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:20:00,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1998104146, now seen corresponding path program 1 times [2021-10-13 01:20:00,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:20:00,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089928713] [2021-10-13 01:20:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:00,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:20:00,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:00,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:20:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:00,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:20:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:01,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 01:20:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:20:01,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:20:01,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089928713] [2021-10-13 01:20:01,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089928713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:20:01,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793092265] [2021-10-13 01:20:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:01,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:01,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:20:01,574 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:20:01,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 01:20:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:02,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-13 01:20:02,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:20:02,358 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 01:20:02,422 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 01:20:02,423 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 01:20:02,450 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 13 treesize of output 9 [2021-10-13 01:20:02,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:20:02,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 01:20:02,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:20:02,606 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-13 01:20:02,606 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 3 case distinctions, treesize of input 56 treesize of output 43 [2021-10-13 01:20:02,983 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-10-13 01:20:02,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 29 [2021-10-13 01:20:03,217 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 21 [2021-10-13 01:20:03,282 INFO L354 Elim1Store]: treesize reduction 106, result has 2.8 percent of original size [2021-10-13 01:20:03,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 39 [2021-10-13 01:20:03,286 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 17 treesize of output 13 [2021-10-13 01:20:03,456 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 17 treesize of output 9 [2021-10-13 01:20:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:20:03,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793092265] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:20:03,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:20:03,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 40 [2021-10-13 01:20:03,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936101700] [2021-10-13 01:20:03,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-13 01:20:03,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:20:03,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-13 01:20:03,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1534, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 01:20:03,465 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 33 states have internal predecessors, (82), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:20:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:05,986 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2021-10-13 01:20:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 01:20:05,987 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 33 states have internal predecessors, (82), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 54 [2021-10-13 01:20:05,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:05,988 INFO L225 Difference]: With dead ends: 114 [2021-10-13 01:20:05,988 INFO L226 Difference]: Without dead ends: 114 [2021-10-13 01:20:05,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 2561.5ms TimeCoverageRelationStatistics Valid=407, Invalid=4015, Unknown=0, NotChecked=0, Total=4422 [2021-10-13 01:20:05,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-13 01:20:05,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2021-10-13 01:20:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 83 states have (on average 1.2289156626506024) internal successors, (102), 92 states have internal predecessors, (102), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-13 01:20:05,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2021-10-13 01:20:05,995 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 54 [2021-10-13 01:20:05,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:05,996 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2021-10-13 01:20:05,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 33 states have internal predecessors, (82), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-13 01:20:05,996 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2021-10-13 01:20:05,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-13 01:20:05,997 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:20:05,998 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-13 01:20:06,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 01:20:06,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:06,214 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting dll_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:20:06,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:20:06,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1811686451, now seen corresponding path program 1 times [2021-10-13 01:20:06,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:20:06,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021281313] [2021-10-13 01:20:06,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:06,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:20:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:06,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:20:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:06,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:20:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:06,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 01:20:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 01:20:06,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:20:06,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021281313] [2021-10-13 01:20:06,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021281313] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:20:06,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962512607] [2021-10-13 01:20:06,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:06,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:06,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:20:06,336 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:20:06,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 01:20:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:07,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:20:07,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:20:07,664 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 17 treesize of output 9 [2021-10-13 01:20:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-13 01:20:07,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962512607] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:20:07,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-13 01:20:07,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-10-13 01:20:07,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226036195] [2021-10-13 01:20:07,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 01:20:07,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:20:07,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 01:20:07,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-13 01:20:07,674 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 01:20:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:07,743 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-10-13 01:20:07,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 01:20:07,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2021-10-13 01:20:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:07,745 INFO L225 Difference]: With dead ends: 111 [2021-10-13 01:20:07,745 INFO L226 Difference]: Without dead ends: 111 [2021-10-13 01:20:07,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:20:07,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-13 01:20:07,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2021-10-13 01:20:07,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 96 states have internal predecessors, (106), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-10-13 01:20:07,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2021-10-13 01:20:07,750 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 55 [2021-10-13 01:20:07,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:07,751 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2021-10-13 01:20:07,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-13 01:20:07,751 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2021-10-13 01:20:07,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-13 01:20:07,752 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:20:07,753 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, 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 01:20:07,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 01:20:07,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:07,978 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_LEAK === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:20:07,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:20:07,978 INFO L82 PathProgramCache]: Analyzing trace with hash -2026508256, now seen corresponding path program 1 times [2021-10-13 01:20:07,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:20:07,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550118073] [2021-10-13 01:20:07,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:07,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:20:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:08,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:20:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:08,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:20:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:08,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 01:20:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:08,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-13 01:20:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 01:20:08,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:20:08,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550118073] [2021-10-13 01:20:08,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550118073] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:20:08,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:20:08,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-13 01:20:08,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859248508] [2021-10-13 01:20:08,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 01:20:08,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:20:08,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 01:20:08,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-13 01:20:08,168 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 01:20:08,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:08,627 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2021-10-13 01:20:08,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 01:20:08,628 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2021-10-13 01:20:08,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:08,629 INFO L225 Difference]: With dead ends: 144 [2021-10-13 01:20:08,629 INFO L226 Difference]: Without dead ends: 144 [2021-10-13 01:20:08,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 310.2ms TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-10-13 01:20:08,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-13 01:20:08,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 116. [2021-10-13 01:20:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 102 states have internal predecessors, (113), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-13 01:20:08,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2021-10-13 01:20:08,635 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 63 [2021-10-13 01:20:08,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:08,636 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2021-10-13 01:20:08,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-10-13 01:20:08,636 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2021-10-13 01:20:08,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-13 01:20:08,637 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:20:08,638 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, 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 01:20:08,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-13 01:20:08,638 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr3ENSURES_VIOLATIONMEMORY_LEAK === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:20:08,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:20:08,639 INFO L82 PathProgramCache]: Analyzing trace with hash -2026508191, now seen corresponding path program 1 times [2021-10-13 01:20:08,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:20:08,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422690828] [2021-10-13 01:20:08,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:08,639 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:20:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:08,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:20:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:08,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:20:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:09,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 01:20:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:10,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-13 01:20:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:20:10,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:20:10,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422690828] [2021-10-13 01:20:10,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422690828] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:20:10,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217011307] [2021-10-13 01:20:10,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:10,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:10,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:20:10,180 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:20:10,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 01:20:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:10,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 93 conjunts are in the unsatisfiable core [2021-10-13 01:20:10,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:20:11,263 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 01:20:11,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:20:11,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 01:20:11,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:20:11,501 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-13 01:20:11,501 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 3 case distinctions, treesize of input 77 treesize of output 64 [2021-10-13 01:20:13,078 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 184 treesize of output 180 [2021-10-13 01:20:13,324 INFO L354 Elim1Store]: treesize reduction 406, result has 11.7 percent of original size [2021-10-13 01:20:13,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 319 treesize of output 183 [2021-10-13 01:20:13,340 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 232 treesize of output 196 [2021-10-13 01:20:14,679 INFO L354 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2021-10-13 01:20:14,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 69 [2021-10-13 01:20:14,684 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 57 treesize of output 53 [2021-10-13 01:20:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 01:20:15,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217011307] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:20:15,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:20:15,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 55 [2021-10-13 01:20:15,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990826870] [2021-10-13 01:20:15,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-13 01:20:15,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:20:15,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-13 01:20:15,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2911, Unknown=0, NotChecked=0, Total=3080 [2021-10-13 01:20:15,156 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 56 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 50 states have internal predecessors, (102), 7 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-13 01:20:18,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:18,397 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2021-10-13 01:20:18,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 01:20:18,397 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 50 states have internal predecessors, (102), 7 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 63 [2021-10-13 01:20:18,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:18,398 INFO L225 Difference]: With dead ends: 124 [2021-10-13 01:20:18,399 INFO L226 Difference]: Without dead ends: 121 [2021-10-13 01:20:18,401 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 4285.7ms TimeCoverageRelationStatistics Valid=371, Invalid=5179, Unknown=0, NotChecked=0, Total=5550 [2021-10-13 01:20:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-13 01:20:18,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2021-10-13 01:20:18,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 103 states have internal predecessors, (115), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-10-13 01:20:18,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2021-10-13 01:20:18,407 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 63 [2021-10-13 01:20:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:18,408 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2021-10-13 01:20:18,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 50 states have internal predecessors, (102), 7 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-10-13 01:20:18,408 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2021-10-13 01:20:18,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-13 01:20:18,409 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:20:18,409 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-10-13 01:20:18,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 01:20:18,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:20:18,626 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting dll_remove_firstErr2REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-10-13 01:20:18,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:20:18,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1606375129, now seen corresponding path program 1 times [2021-10-13 01:20:18,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:20:18,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980474033] [2021-10-13 01:20:18,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:20:18,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:20:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:18,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-13 01:20:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:18,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-13 01:20:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:18,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-13 01:20:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:18,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-13 01:20:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:20:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 01:20:18,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:20:18,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980474033] [2021-10-13 01:20:18,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980474033] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:20:18,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:20:18,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-13 01:20:18,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656234715] [2021-10-13 01:20:18,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 01:20:18,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:20:18,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 01:20:18,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-13 01:20:18,801 INFO L87 Difference]: Start difference. First operand 118 states and 130 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:20:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:20:18,962 INFO L93 Difference]: Finished difference Result 60 states and 59 transitions. [2021-10-13 01:20:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 01:20:18,962 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 64 [2021-10-13 01:20:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:20:18,963 INFO L225 Difference]: With dead ends: 60 [2021-10-13 01:20:18,963 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 01:20:18,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-13 01:20:18,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 01:20:18,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 01:20:18,964 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 01:20:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 01:20:18,964 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 64 [2021-10-13 01:20:18,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:20:18,964 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 01:20:18,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-13 01:20:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 01:20:18,965 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 01:20:18,967 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr0REQUIRES_VIOLATION [2021-10-13 01:20:18,968 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr1REQUIRES_VIOLATION [2021-10-13 01:20:18,968 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr2REQUIRES_VIOLATION [2021-10-13 01:20:18,968 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr3REQUIRES_VIOLATION [2021-10-13 01:20:18,968 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr4REQUIRES_VIOLATION [2021-10-13 01:20:18,969 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr5REQUIRES_VIOLATION [2021-10-13 01:20:18,969 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr6REQUIRES_VIOLATION [2021-10-13 01:20:18,969 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr7REQUIRES_VIOLATION [2021-10-13 01:20:18,969 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:20:18,971 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:20:18,971 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 01:20:18,971 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr11REQUIRES_VIOLATION [2021-10-13 01:20:18,971 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr12REQUIRES_VIOLATION [2021-10-13 01:20:18,972 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-10-13 01:20:18,972 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-10-13 01:20:18,972 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-10-13 01:20:18,972 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-10-13 01:20:18,973 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr4REQUIRES_VIOLATION [2021-10-13 01:20:18,973 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr5REQUIRES_VIOLATION [2021-10-13 01:20:18,973 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-13 01:20:18,973 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-13 01:20:18,973 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 01:20:18,974 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3ENSURES_VIOLATIONMEMORY_LEAK [2021-10-13 01:20:18,974 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr0REQUIRES_VIOLATION [2021-10-13 01:20:18,974 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr1REQUIRES_VIOLATION [2021-10-13 01:20:18,974 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr2REQUIRES_VIOLATION [2021-10-13 01:20:18,975 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr3REQUIRES_VIOLATION [2021-10-13 01:20:18,975 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr4REQUIRES_VIOLATION [2021-10-13 01:20:18,975 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr5REQUIRES_VIOLATION [2021-10-13 01:20:18,975 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr6REQUIRES_VIOLATION [2021-10-13 01:20:18,975 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr7REQUIRES_VIOLATION [2021-10-13 01:20:18,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-13 01:20:18,982 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 01:20:18,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:20:18 BoogieIcfgContainer [2021-10-13 01:20:18,987 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 01:20:18,989 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 01:20:18,989 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 01:20:18,989 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 01:20:18,990 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:18:52" (3/4) ... [2021-10-13 01:20:18,993 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 01:20:19,001 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-13 01:20:19,002 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-13 01:20:19,002 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-13 01:20:19,002 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_create [2021-10-13 01:20:19,002 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-13 01:20:19,003 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-13 01:20:19,003 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-13 01:20:19,003 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-10-13 01:20:19,003 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_remove_first [2021-10-13 01:20:19,012 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-13 01:20:19,012 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-13 01:20:19,013 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-13 01:20:19,013 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 01:20:19,074 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 01:20:19,074 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 01:20:19,075 INFO L168 Benchmark]: Toolchain (without parser) took 88188.21 ms. Allocated memory was 107.0 MB in the beginning and 272.6 MB in the end (delta: 165.7 MB). Free memory was 69.8 MB in the beginning and 136.1 MB in the end (delta: -66.3 MB). Peak memory consumption was 98.6 MB. Max. memory is 16.1 GB. [2021-10-13 01:20:19,076 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 107.0 MB. Free memory was 87.5 MB in the beginning and 87.5 MB in the end (delta: 60.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:20:19,076 INFO L168 Benchmark]: CACSL2BoogieTranslator took 620.62 ms. Allocated memory is still 107.0 MB. Free memory was 69.7 MB in the beginning and 74.8 MB in the end (delta: -5.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 01:20:19,076 INFO L168 Benchmark]: Boogie Preprocessor took 115.69 ms. Allocated memory is still 107.0 MB. Free memory was 74.8 MB in the beginning and 72.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 01:20:19,077 INFO L168 Benchmark]: RCFGBuilder took 674.56 ms. Allocated memory is still 107.0 MB. Free memory was 72.0 MB in the beginning and 48.7 MB in the end (delta: 23.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:20:19,078 INFO L168 Benchmark]: TraceAbstraction took 86684.66 ms. Allocated memory was 107.0 MB in the beginning and 272.6 MB in the end (delta: 165.7 MB). Free memory was 48.4 MB in the beginning and 140.3 MB in the end (delta: -92.0 MB). Peak memory consumption was 75.7 MB. Max. memory is 16.1 GB. [2021-10-13 01:20:19,079 INFO L168 Benchmark]: Witness Printer took 85.62 ms. Allocated memory is still 272.6 MB. Free memory was 140.3 MB in the beginning and 136.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 01:20:19,082 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 107.0 MB. Free memory was 87.5 MB in the beginning and 87.5 MB in the end (delta: 60.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 620.62 ms. Allocated memory is still 107.0 MB. Free memory was 69.7 MB in the beginning and 74.8 MB in the end (delta: -5.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 115.69 ms. Allocated memory is still 107.0 MB. Free memory was 74.8 MB in the beginning and 72.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 674.56 ms. Allocated memory is still 107.0 MB. Free memory was 72.0 MB in the beginning and 48.7 MB in the end (delta: 23.4 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 86684.66 ms. Allocated memory was 107.0 MB in the beginning and 272.6 MB in the end (delta: 165.7 MB). Free memory was 48.4 MB in the beginning and 140.3 MB in the end (delta: -92.0 MB). Peak memory consumption was 75.7 MB. Max. memory is 16.1 GB. * Witness Printer took 85.62 ms. Allocated memory is still 272.6 MB. Free memory was 140.3 MB in the beginning and 136.1 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: 604]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 604]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 604]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 604]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 606]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 606]: 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: 608]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 608]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 608]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 609]: 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: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 619]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 619]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 623]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 611]: all allocated memory was freed For all program executions holds that all allocated memory was freed 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: 593]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 593]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 596]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 596]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 96 locations, 31 error locations. Started 1 CEGAR loops. OverallTime: 86607.9ms, OverallIterations: 31, TraceHistogramMax: 3, EmptinessCheckTime: 45.9ms, AutomataDifference: 38561.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1123 SDtfs, 3740 SDslu, 5985 SDs, 0 SdLazy, 20837 SolverSat, 756 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 15360.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1532 GetRequests, 671 SyntacticMatches, 18 SemanticMatches, 843 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8086 ImplicationChecksByTransitivity, 36681.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=123occurred in iteration=15, InterpolantAutomatonStates: 495, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 242.0ms AutomataMinimizationTime, 31 MinimizatonAttempts, 442 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 319.1ms SsaConstructionTime, 1284.5ms SatisfiabilityAnalysisTime, 34849.1ms InterpolantComputationTime, 1899 NumberOfCodeBlocks, 1885 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 1850 ConstructedInterpolants, 121 QuantifiedInterpolants, 29924 SizeOfPredicates, 196 NumberOfNonLiveVariables, 4554 ConjunctsInSsa, 692 ConjunctsInUnsatCore, 49 InterpolantComputations, 15 PerfectInterpolantSequences, 251/584 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 31 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-13 01:20:19,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_923e23ee-fe44-4a71-ab72-5a2232227ef9/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...