./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 b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD --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 b594cdd667b896d6ce097f6fd96950290806f015d929f3b2b06ffea35d861f89 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 22:55:12,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:55:12,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:55:12,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:55:12,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:55:12,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:55:12,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:55:12,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:55:12,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:55:12,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:55:12,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:55:12,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:55:12,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:55:12,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:55:12,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:55:12,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:55:12,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:55:12,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:55:12,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:55:12,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:55:12,458 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:55:12,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:55:12,467 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:55:12,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:55:12,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:55:12,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:55:12,482 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:55:12,483 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:55:12,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:55:12,494 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:55:12,495 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:55:12,497 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:55:12,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:55:12,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:55:12,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:55:12,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:55:12,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:55:12,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:55:12,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:55:12,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:55:12,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:55:12,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 22:55:12,555 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:55:12,556 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:55:12,556 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:55:12,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:55:12,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:55:12,559 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:55:12,559 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:55:12,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:55:12,560 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:55:12,560 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 22:55:12,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:55:12,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:55:12,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:55:12,562 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 22:55:12,562 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 22:55:12,562 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 22:55:12,563 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:55:12,563 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 22:55:12,563 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:55:12,564 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:55:12,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:55:12,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:55:12,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:55:12,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:55:12,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:55:12,566 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:55:12,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 22:55:12,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 22:55:12,567 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:55:12,567 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_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b594cdd667b896d6ce097f6fd96950290806f015d929f3b2b06ffea35d861f89 [2021-10-28 22:55:12,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:55:12,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:55:12,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:55:12,921 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:55:12,922 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:55:12,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/list-simple/dll2n_remove_all.i [2021-10-28 22:55:12,997 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/data/2e2d12369/f54154c81a484086b4ffbe246b4ee509/FLAG69264a4d4 [2021-10-28 22:55:13,600 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:55:13,601 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/sv-benchmarks/c/list-simple/dll2n_remove_all.i [2021-10-28 22:55:13,627 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/data/2e2d12369/f54154c81a484086b4ffbe246b4ee509/FLAG69264a4d4 [2021-10-28 22:55:13,874 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/data/2e2d12369/f54154c81a484086b4ffbe246b4ee509 [2021-10-28 22:55:13,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:55:13,879 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 22:55:13,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:55:13,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:55:13,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:55:13,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:55:13" (1/1) ... [2021-10-28 22:55:13,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c663a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:13, skipping insertion in model container [2021-10-28 22:55:13,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:55:13" (1/1) ... [2021-10-28 22:55:13,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:55:13,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:55:14,428 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_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/sv-benchmarks/c/list-simple/dll2n_remove_all.i[24090,24103] [2021-10-28 22:55:14,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:55:14,451 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:55:14,514 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_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/sv-benchmarks/c/list-simple/dll2n_remove_all.i[24090,24103] [2021-10-28 22:55:14,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:55:14,564 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:55:14,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:14 WrapperNode [2021-10-28 22:55:14,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:55:14,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:55:14,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:55:14,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:55:14,587 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:14" (1/1) ... [2021-10-28 22:55:14,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:14" (1/1) ... [2021-10-28 22:55:14,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:14" (1/1) ... [2021-10-28 22:55:14,609 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:14" (1/1) ... [2021-10-28 22:55:14,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:14" (1/1) ... [2021-10-28 22:55:14,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:14" (1/1) ... [2021-10-28 22:55:14,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:14" (1/1) ... [2021-10-28 22:55:14,682 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:55:14,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:55:14,684 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:55:14,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:55:14,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:14" (1/1) ... [2021-10-28 22:55:14,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:55:14,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:14,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:55:14,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:55:14,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 22:55:14,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:55:14,812 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 22:55:14,812 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 22:55:14,813 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 22:55:14,814 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 22:55:14,815 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-10-28 22:55:14,815 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2021-10-28 22:55:14,815 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_remove_first [2021-10-28 22:55:14,816 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 22:55:14,817 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 22:55:14,817 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 22:55:14,817 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 22:55:14,817 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 22:55:14,818 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 22:55:14,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 22:55:14,818 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 22:55:14,818 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 22:55:14,818 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 22:55:14,819 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 22:55:14,819 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 22:55:14,819 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 22:55:14,819 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 22:55:14,820 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 22:55:14,821 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 22:55:14,821 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 22:55:14,821 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 22:55:14,822 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 22:55:14,822 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 22:55:14,822 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 22:55:14,822 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 22:55:14,822 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 22:55:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 22:55:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 22:55:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 22:55:14,823 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 22:55:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 22:55:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 22:55:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 22:55:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 22:55:14,824 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 22:55:14,825 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 22:55:14,825 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 22:55:14,825 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 22:55:14,825 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 22:55:14,826 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 22:55:14,826 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 22:55:14,826 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 22:55:14,826 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 22:55:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 22:55:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 22:55:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 22:55:14,828 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 22:55:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 22:55:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 22:55:14,829 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 22:55:14,830 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 22:55:14,830 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 22:55:14,830 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 22:55:14,831 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 22:55:14,831 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 22:55:14,831 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 22:55:14,832 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 22:55:14,832 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 22:55:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 22:55:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 22:55:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 22:55:14,835 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 22:55:14,836 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 22:55:14,836 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 22:55:14,837 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 22:55:14,837 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 22:55:14,837 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-28 22:55:14,837 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 22:55:14,837 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 22:55:14,838 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 22:55:14,838 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 22:55:14,838 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 22:55:14,838 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 22:55:14,839 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 22:55:14,839 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 22:55:14,839 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 22:55:14,839 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 22:55:14,839 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 22:55:14,841 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 22:55:14,841 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 22:55:14,841 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 22:55:14,841 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 22:55:14,842 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 22:55:14,842 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 22:55:14,842 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 22:55:14,842 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 22:55:14,842 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 22:55:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 22:55:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 22:55:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 22:55:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 22:55:14,843 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 22:55:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 22:55:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 22:55:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 22:55:14,844 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 22:55:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 22:55:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 22:55:14,845 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 22:55:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 22:55:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 22:55:14,846 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 22:55:14,847 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 22:55:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 22:55:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 22:55:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 22:55:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 22:55:14,848 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 22:55:14,849 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 22:55:14,849 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 22:55:14,849 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 22:55:14,849 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 22:55:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 22:55:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 22:55:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 22:55:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-10-28 22:55:14,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 22:55:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 22:55:14,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 22:55:14,852 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2021-10-28 22:55:14,853 INFO L130 BoogieDeclarations]: Found specification of procedure dll_remove_first [2021-10-28 22:55:14,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 22:55:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 22:55:14,857 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 22:55:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-28 22:55:14,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 22:55:14,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 22:55:14,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:55:14,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 22:55:15,251 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 22:55:15,612 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:55:15,613 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 22:55:15,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:55:15 BoogieIcfgContainer [2021-10-28 22:55:15,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:55:15,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:55:15,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:55:15,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:55:15,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:55:13" (1/3) ... [2021-10-28 22:55:15,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199eafd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:55:15, skipping insertion in model container [2021-10-28 22:55:15,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:55:14" (2/3) ... [2021-10-28 22:55:15,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@199eafd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:55:15, skipping insertion in model container [2021-10-28 22:55:15,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:55:15" (3/3) ... [2021-10-28 22:55:15,625 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all.i [2021-10-28 22:55:15,632 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:55:15,632 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2021-10-28 22:55:15,684 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:55:15,691 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 22:55:15,691 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-10-28 22:55:15,705 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) [2021-10-28 22:55:15,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:55:15,713 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:15,713 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:15,714 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)] === [2021-10-28 22:55:15,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:15,741 INFO L85 PathProgramCache]: Analyzing trace with hash 922136398, now seen corresponding path program 1 times [2021-10-28 22:55:15,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:15,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936320259] [2021-10-28 22:55:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:15,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:16,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:16,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:16,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936320259] [2021-10-28 22:55:16,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936320259] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:16,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:16,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:55:16,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534988521] [2021-10-28 22:55:16,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:55:16,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:16,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:55:16,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:55:16,149 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) [2021-10-28 22:55:16,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:16,493 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2021-10-28 22:55:16,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:55:16,495 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 [2021-10-28 22:55:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:16,507 INFO L225 Difference]: With dead ends: 72 [2021-10-28 22:55:16,507 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 22:55:16,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:55:16,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 22:55:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2021-10-28 22:55:16,550 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) [2021-10-28 22:55:16,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-10-28 22:55:16,554 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 11 [2021-10-28 22:55:16,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:16,555 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-10-28 22:55:16,556 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) [2021-10-28 22:55:16,556 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2021-10-28 22:55:16,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:55:16,557 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:16,557 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:16,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 22:55:16,558 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)] === [2021-10-28 22:55:16,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:16,559 INFO L85 PathProgramCache]: Analyzing trace with hash 922136399, now seen corresponding path program 1 times [2021-10-28 22:55:16,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:16,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814800898] [2021-10-28 22:55:16,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:16,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:16,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:16,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:16,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:16,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814800898] [2021-10-28 22:55:16,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814800898] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:16,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:16,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:55:16,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234970973] [2021-10-28 22:55:16,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:55:16,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:16,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:55:16,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:55:16,731 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) [2021-10-28 22:55:16,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:16,954 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2021-10-28 22:55:16,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:55:16,954 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 [2021-10-28 22:55:16,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:16,963 INFO L225 Difference]: With dead ends: 63 [2021-10-28 22:55:16,963 INFO L226 Difference]: Without dead ends: 63 [2021-10-28 22:55:16,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:55:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-28 22:55:16,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2021-10-28 22:55:16,983 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) [2021-10-28 22:55:16,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-10-28 22:55:16,990 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 11 [2021-10-28 22:55:16,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:16,990 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-10-28 22:55:16,991 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) [2021-10-28 22:55:16,991 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-10-28 22:55:16,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 22:55:16,992 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:16,992 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:16,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 22:55:16,993 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)] === [2021-10-28 22:55:16,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:16,995 INFO L85 PathProgramCache]: Analyzing trace with hash 854735752, now seen corresponding path program 1 times [2021-10-28 22:55:16,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:16,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135695372] [2021-10-28 22:55:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:16,998 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:17,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:17,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:17,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:17,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:17,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135695372] [2021-10-28 22:55:17,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135695372] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:17,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:17,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 22:55:17,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681733845] [2021-10-28 22:55:17,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:55:17,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:17,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:55:17,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:55:17,275 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) [2021-10-28 22:55:17,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:17,605 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2021-10-28 22:55:17,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:55:17,606 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 [2021-10-28 22:55:17,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:17,610 INFO L225 Difference]: With dead ends: 81 [2021-10-28 22:55:17,610 INFO L226 Difference]: Without dead ends: 78 [2021-10-28 22:55:17,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:55:17,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-28 22:55:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-10-28 22:55:17,625 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) [2021-10-28 22:55:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-10-28 22:55:17,643 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 15 [2021-10-28 22:55:17,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:17,643 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-10-28 22:55:17,644 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) [2021-10-28 22:55:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-10-28 22:55:17,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 22:55:17,645 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:17,645 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:17,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 22:55:17,646 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)] === [2021-10-28 22:55:17,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:17,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1920649746, now seen corresponding path program 1 times [2021-10-28 22:55:17,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:17,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137301194] [2021-10-28 22:55:17,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:17,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:17,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:17,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:17,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137301194] [2021-10-28 22:55:17,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137301194] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:17,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:17,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:55:17,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308276987] [2021-10-28 22:55:17,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:55:17,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:17,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:55:17,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:55:17,773 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) [2021-10-28 22:55:17,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:17,964 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-10-28 22:55:17,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:55:17,965 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 [2021-10-28 22:55:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:17,972 INFO L225 Difference]: With dead ends: 66 [2021-10-28 22:55:17,972 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 22:55:17,973 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:55:17,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 22:55:17,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-10-28 22:55:17,986 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) [2021-10-28 22:55:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-10-28 22:55:17,988 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 15 [2021-10-28 22:55:17,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:17,988 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-10-28 22:55:17,989 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) [2021-10-28 22:55:17,989 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-10-28 22:55:17,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 22:55:17,990 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:17,990 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:17,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 22:55:17,991 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)] === [2021-10-28 22:55:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:17,992 INFO L85 PathProgramCache]: Analyzing trace with hash -822231468, now seen corresponding path program 1 times [2021-10-28 22:55:17,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:17,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503256637] [2021-10-28 22:55:17,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:17,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:18,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:18,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:18,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:18,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:18,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503256637] [2021-10-28 22:55:18,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503256637] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:18,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875715744] [2021-10-28 22:55:18,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:18,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:18,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:18,177 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:18,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 22:55:18,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:18,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:55:18,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:18,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875715744] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:18,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:18,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-10-28 22:55:18,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423704565] [2021-10-28 22:55:18,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:55:18,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:18,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:55:18,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:55:18,551 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) [2021-10-28 22:55:18,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:18,929 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-10-28 22:55:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:55:18,930 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 [2021-10-28 22:55:18,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:18,931 INFO L225 Difference]: With dead ends: 88 [2021-10-28 22:55:18,931 INFO L226 Difference]: Without dead ends: 85 [2021-10-28 22:55:18,932 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:55:18,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-28 22:55:18,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2021-10-28 22:55:18,937 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) [2021-10-28 22:55:18,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-10-28 22:55:18,938 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 22 [2021-10-28 22:55:18,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:18,939 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-10-28 22:55:18,939 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) [2021-10-28 22:55:18,939 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-10-28 22:55:18,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 22:55:18,940 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:18,941 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:18,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:19,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:19,172 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)] === [2021-10-28 22:55:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:19,173 INFO L85 PathProgramCache]: Analyzing trace with hash 243682526, now seen corresponding path program 1 times [2021-10-28 22:55:19,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:19,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328899121] [2021-10-28 22:55:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:19,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:19,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:19,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:19,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:19,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328899121] [2021-10-28 22:55:19,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328899121] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:19,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114591125] [2021-10-28 22:55:19,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:19,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:19,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:19,368 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:19,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 22:55:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:19,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 22:55:19,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:19,619 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 [2021-10-28 22:55:19,711 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-28 22:55:19,712 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 [2021-10-28 22:55:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:19,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114591125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:19,962 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:19,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-28 22:55:19,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550680347] [2021-10-28 22:55:19,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:55:19,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:19,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:55:19,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:55:19,967 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) [2021-10-28 22:55:20,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:20,202 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-10-28 22:55:20,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:55:20,202 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 [2021-10-28 22:55:20,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:20,204 INFO L225 Difference]: With dead ends: 66 [2021-10-28 22:55:20,204 INFO L226 Difference]: Without dead ends: 66 [2021-10-28 22:55:20,205 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:55:20,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-28 22:55:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-28 22:55:20,210 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) [2021-10-28 22:55:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-10-28 22:55:20,211 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 22 [2021-10-28 22:55:20,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:20,212 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-10-28 22:55:20,212 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) [2021-10-28 22:55:20,212 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-10-28 22:55:20,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 22:55:20,213 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:20,214 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:20,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-28 22:55:20,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 22:55:20,440 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)] === [2021-10-28 22:55:20,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:20,441 INFO L85 PathProgramCache]: Analyzing trace with hash 243682527, now seen corresponding path program 1 times [2021-10-28 22:55:20,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:20,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006329568] [2021-10-28 22:55:20,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:20,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:20,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:20,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:20,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:20,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:20,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006329568] [2021-10-28 22:55:20,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006329568] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:20,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756713125] [2021-10-28 22:55:20,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:20,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:20,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:20,620 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:20,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 22:55:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:20,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 22:55:20,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:20,842 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 [2021-10-28 22:55:20,849 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 [2021-10-28 22:55:21,014 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:55:21,015 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 [2021-10-28 22:55:21,027 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:55:21,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-10-28 22:55:21,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:21,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756713125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:21,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:21,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-10-28 22:55:21,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724374171] [2021-10-28 22:55:21,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:55:21,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:21,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:55:21,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:55:21,226 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) [2021-10-28 22:55:21,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:21,453 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-10-28 22:55:21,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:55:21,454 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 [2021-10-28 22:55:21,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:21,455 INFO L225 Difference]: With dead ends: 65 [2021-10-28 22:55:21,455 INFO L226 Difference]: Without dead ends: 65 [2021-10-28 22:55:21,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:55:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-28 22:55:21,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-28 22:55:21,459 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) [2021-10-28 22:55:21,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-10-28 22:55:21,461 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 22 [2021-10-28 22:55:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:21,461 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-10-28 22:55:21,461 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) [2021-10-28 22:55:21,462 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-10-28 22:55:21,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-28 22:55:21,463 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:21,463 INFO L513 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] [2021-10-28 22:55:21,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:21,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:21,664 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)] === [2021-10-28 22:55:21,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:21,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1060389368, now seen corresponding path program 2 times [2021-10-28 22:55:21,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:21,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601477605] [2021-10-28 22:55:21,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:21,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:21,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:21,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:21,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:21,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601477605] [2021-10-28 22:55:21,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601477605] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:21,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703552212] [2021-10-28 22:55:21,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:55:21,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:21,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:21,779 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:21,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 22:55:21,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-28 22:55:21,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:55:21,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 22:55:21,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 22:55:22,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703552212] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:22,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:55:22,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-10-28 22:55:22,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619474216] [2021-10-28 22:55:22,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:55:22,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:22,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:55:22,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:55:22,076 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) [2021-10-28 22:55:22,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:22,098 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-10-28 22:55:22,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:55:22,099 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 [2021-10-28 22:55:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:22,101 INFO L225 Difference]: With dead ends: 68 [2021-10-28 22:55:22,101 INFO L226 Difference]: Without dead ends: 68 [2021-10-28 22:55:22,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:55:22,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-28 22:55:22,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-10-28 22:55:22,110 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) [2021-10-28 22:55:22,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-10-28 22:55:22,111 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 29 [2021-10-28 22:55:22,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:22,111 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-10-28 22:55:22,112 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) [2021-10-28 22:55:22,112 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-10-28 22:55:22,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-28 22:55:22,113 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:22,113 INFO L513 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] [2021-10-28 22:55:22,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:22,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:22,336 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)] === [2021-10-28 22:55:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:22,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1126814843, now seen corresponding path program 1 times [2021-10-28 22:55:22,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:22,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124939527] [2021-10-28 22:55:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:22,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:22,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:22,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:22,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:22,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124939527] [2021-10-28 22:55:22,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124939527] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:22,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613843147] [2021-10-28 22:55:22,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:22,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:22,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:22,486 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:22,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 22:55:22,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:22,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:55:22,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:22,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613843147] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:22,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:22,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2021-10-28 22:55:22,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655693121] [2021-10-28 22:55:22,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:55:22,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:22,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:55:22,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 22:55:22,814 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) [2021-10-28 22:55:23,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:23,034 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-10-28 22:55:23,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:55:23,035 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 [2021-10-28 22:55:23,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:23,036 INFO L225 Difference]: With dead ends: 75 [2021-10-28 22:55:23,036 INFO L226 Difference]: Without dead ends: 75 [2021-10-28 22:55:23,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:55:23,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-28 22:55:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2021-10-28 22:55:23,041 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) [2021-10-28 22:55:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-10-28 22:55:23,042 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 31 [2021-10-28 22:55:23,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:23,042 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-10-28 22:55:23,043 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) [2021-10-28 22:55:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-10-28 22:55:23,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 22:55:23,045 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:23,045 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:23,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:23,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-28 22:55:23,256 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)] === [2021-10-28 22:55:23,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:23,257 INFO L85 PathProgramCache]: Analyzing trace with hash 277523133, now seen corresponding path program 1 times [2021-10-28 22:55:23,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:23,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818089375] [2021-10-28 22:55:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:23,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:23,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:23,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:23,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:23,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818089375] [2021-10-28 22:55:23,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818089375] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:23,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96158283] [2021-10-28 22:55:23,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:23,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:23,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:23,672 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:23,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 22:55:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:23,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-28 22:55:23,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:23,912 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 [2021-10-28 22:55:23,949 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 [2021-10-28 22:55:24,488 INFO L354 Elim1Store]: treesize reduction 50, result has 9.1 percent of original size [2021-10-28 22:55:24,489 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 [2021-10-28 22:55:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:24,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96158283] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:24,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:24,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-10-28 22:55:24,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640417897] [2021-10-28 22:55:24,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 22:55:24,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:24,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 22:55:24,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-10-28 22:55:24,702 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) [2021-10-28 22:55:26,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:26,272 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2021-10-28 22:55:26,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 22:55:26,273 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 [2021-10-28 22:55:26,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:26,276 INFO L225 Difference]: With dead ends: 114 [2021-10-28 22:55:26,276 INFO L226 Difference]: Without dead ends: 114 [2021-10-28 22:55:26,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 22:55:26,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-28 22:55:26,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 81. [2021-10-28 22:55:26,283 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) [2021-10-28 22:55:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-10-28 22:55:26,285 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 32 [2021-10-28 22:55:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:26,286 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-10-28 22:55:26,286 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) [2021-10-28 22:55:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-10-28 22:55:26,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-28 22:55:26,287 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:26,288 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:26,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:26,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 22:55:26,505 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)] === [2021-10-28 22:55:26,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:26,505 INFO L85 PathProgramCache]: Analyzing trace with hash 277523134, now seen corresponding path program 1 times [2021-10-28 22:55:26,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:26,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20921595] [2021-10-28 22:55:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:26,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:26,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:26,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:26,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:26,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20921595] [2021-10-28 22:55:26,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20921595] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:26,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698948876] [2021-10-28 22:55:26,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:26,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:26,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:26,950 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:26,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 22:55:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:27,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 22:55:27,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:27,254 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 [2021-10-28 22:55:27,276 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 [2021-10-28 22:55:27,868 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-10-28 22:55:27,868 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 [2021-10-28 22:55:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:28,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698948876] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:28,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:28,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2021-10-28 22:55:28,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721675646] [2021-10-28 22:55:28,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-28 22:55:28,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:28,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 22:55:28,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-10-28 22:55:28,090 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) [2021-10-28 22:55:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:29,348 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2021-10-28 22:55:29,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 22:55:29,349 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 [2021-10-28 22:55:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:29,351 INFO L225 Difference]: With dead ends: 126 [2021-10-28 22:55:29,351 INFO L226 Difference]: Without dead ends: 126 [2021-10-28 22:55:29,352 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-10-28 22:55:29,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-10-28 22:55:29,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2021-10-28 22:55:29,360 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) [2021-10-28 22:55:29,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2021-10-28 22:55:29,363 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 32 [2021-10-28 22:55:29,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:29,363 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2021-10-28 22:55:29,364 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) [2021-10-28 22:55:29,364 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2021-10-28 22:55:29,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 22:55:29,369 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:29,369 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:29,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:29,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 22:55:29,584 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)] === [2021-10-28 22:55:29,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:29,585 INFO L85 PathProgramCache]: Analyzing trace with hash 13282519, now seen corresponding path program 1 times [2021-10-28 22:55:29,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:29,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683232267] [2021-10-28 22:55:29,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:29,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:29,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:29,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:29,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 22:55:29,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:29,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683232267] [2021-10-28 22:55:29,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683232267] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:29,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:29,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 22:55:29,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393455734] [2021-10-28 22:55:29,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 22:55:29,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:29,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 22:55:29,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:55:29,802 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) [2021-10-28 22:55:30,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:30,385 INFO L93 Difference]: Finished difference Result 138 states and 166 transitions. [2021-10-28 22:55:30,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 22:55:30,386 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 [2021-10-28 22:55:30,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:30,388 INFO L225 Difference]: With dead ends: 138 [2021-10-28 22:55:30,388 INFO L226 Difference]: Without dead ends: 138 [2021-10-28 22:55:30,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-10-28 22:55:30,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-28 22:55:30,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 103. [2021-10-28 22:55:30,394 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) [2021-10-28 22:55:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2021-10-28 22:55:30,396 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 33 [2021-10-28 22:55:30,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:30,397 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2021-10-28 22:55:30,397 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) [2021-10-28 22:55:30,397 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2021-10-28 22:55:30,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 22:55:30,398 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:30,399 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:30,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-10-28 22:55:30,399 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)] === [2021-10-28 22:55:30,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:30,400 INFO L85 PathProgramCache]: Analyzing trace with hash 13282520, now seen corresponding path program 1 times [2021-10-28 22:55:30,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:30,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622492109] [2021-10-28 22:55:30,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:30,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:30,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:30,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:55:30,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:30,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622492109] [2021-10-28 22:55:30,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622492109] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:30,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:30,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 22:55:30,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455343513] [2021-10-28 22:55:30,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 22:55:30,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:30,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 22:55:30,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:55:30,630 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) [2021-10-28 22:55:31,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:31,205 INFO L93 Difference]: Finished difference Result 141 states and 169 transitions. [2021-10-28 22:55:31,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 22:55:31,206 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 [2021-10-28 22:55:31,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:31,207 INFO L225 Difference]: With dead ends: 141 [2021-10-28 22:55:31,207 INFO L226 Difference]: Without dead ends: 141 [2021-10-28 22:55:31,208 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-10-28 22:55:31,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-28 22:55:31,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2021-10-28 22:55:31,217 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) [2021-10-28 22:55:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2021-10-28 22:55:31,218 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 33 [2021-10-28 22:55:31,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:31,218 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2021-10-28 22:55:31,219 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) [2021-10-28 22:55:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2021-10-28 22:55:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 22:55:31,220 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:31,220 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:31,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-28 22:55:31,220 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)] === [2021-10-28 22:55:31,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:31,221 INFO L85 PathProgramCache]: Analyzing trace with hash 562523457, now seen corresponding path program 1 times [2021-10-28 22:55:31,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:31,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21399463] [2021-10-28 22:55:31,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:31,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:31,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:31,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:31,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:31,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:31,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21399463] [2021-10-28 22:55:31,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21399463] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:31,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163343217] [2021-10-28 22:55:31,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:31,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:31,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:31,663 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:31,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 22:55:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:31,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-28 22:55:31,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:31,970 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 [2021-10-28 22:55:32,004 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:55:32,005 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 [2021-10-28 22:55:32,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-28 22:55:32,075 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 [2021-10-28 22:55:32,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:55:32,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:55:32,100 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 [2021-10-28 22:55:32,108 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 [2021-10-28 22:55:32,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:55:32,223 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-28 22:55:32,223 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 [2021-10-28 22:55:32,243 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-10-28 22:55:32,244 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 [2021-10-28 22:55:33,328 INFO L354 Elim1Store]: treesize reduction 106, result has 2.8 percent of original size [2021-10-28 22:55:33,329 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 [2021-10-28 22:55:33,360 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-10-28 22:55:33,361 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 [2021-10-28 22:55:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:33,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163343217] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:33,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:33,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-10-28 22:55:33,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707769923] [2021-10-28 22:55:33,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-28 22:55:33,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:33,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-28 22:55:33,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-10-28 22:55:33,385 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) [2021-10-28 22:55:35,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:35,731 INFO L93 Difference]: Finished difference Result 136 states and 162 transitions. [2021-10-28 22:55:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 22:55:35,731 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 [2021-10-28 22:55:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:35,733 INFO L225 Difference]: With dead ends: 136 [2021-10-28 22:55:35,733 INFO L226 Difference]: Without dead ends: 136 [2021-10-28 22:55:35,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2021-10-28 22:55:35,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-28 22:55:35,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2021-10-28 22:55:35,741 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) [2021-10-28 22:55:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-10-28 22:55:35,743 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 36 [2021-10-28 22:55:35,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:35,743 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-10-28 22:55:35,743 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) [2021-10-28 22:55:35,744 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-10-28 22:55:35,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 22:55:35,745 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:35,745 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:35,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:35,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 22:55:35,964 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)] === [2021-10-28 22:55:35,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:35,965 INFO L85 PathProgramCache]: Analyzing trace with hash 562523458, now seen corresponding path program 1 times [2021-10-28 22:55:35,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:35,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664422644] [2021-10-28 22:55:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:35,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:36,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:36,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:36,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:36,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:36,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664422644] [2021-10-28 22:55:36,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664422644] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:36,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438066185] [2021-10-28 22:55:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:36,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:36,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:36,660 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:36,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 22:55:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:37,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-28 22:55:37,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:37,111 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 [2021-10-28 22:55:37,276 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:55:37,277 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 [2021-10-28 22:55:37,371 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 [2021-10-28 22:55:37,380 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 [2021-10-28 22:55:37,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:55:37,459 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 [2021-10-28 22:55:37,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:55:37,476 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 [2021-10-28 22:55:37,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:55:37,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 22:55:37,629 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-28 22:55:37,630 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 [2021-10-28 22:55:37,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 22:55:37,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:55:37,647 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-28 22:55:37,647 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 [2021-10-28 22:55:38,780 INFO L354 Elim1Store]: treesize reduction 65, result has 11.0 percent of original size [2021-10-28 22:55:38,781 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 [2021-10-28 22:55:38,804 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-10-28 22:55:38,804 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 [2021-10-28 22:55:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:38,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438066185] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:38,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:38,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-10-28 22:55:38,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484153723] [2021-10-28 22:55:38,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-28 22:55:38,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:38,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-28 22:55:38,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 22:55:38,950 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) [2021-10-28 22:55:42,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:42,962 INFO L93 Difference]: Finished difference Result 143 states and 165 transitions. [2021-10-28 22:55:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-28 22:55:42,963 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 [2021-10-28 22:55:42,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:42,964 INFO L225 Difference]: With dead ends: 143 [2021-10-28 22:55:42,965 INFO L226 Difference]: Without dead ends: 143 [2021-10-28 22:55:42,966 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=348, Invalid=2958, Unknown=0, NotChecked=0, Total=3306 [2021-10-28 22:55:42,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-10-28 22:55:42,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 123. [2021-10-28 22:55:42,972 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) [2021-10-28 22:55:42,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2021-10-28 22:55:42,974 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 36 [2021-10-28 22:55:42,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:42,974 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2021-10-28 22:55:42,975 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) [2021-10-28 22:55:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2021-10-28 22:55:42,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 22:55:42,976 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:42,976 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:43,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:43,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-28 22:55:43,181 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)] === [2021-10-28 22:55:43,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:43,182 INFO L85 PathProgramCache]: Analyzing trace with hash -580837085, now seen corresponding path program 1 times [2021-10-28 22:55:43,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:43,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529088582] [2021-10-28 22:55:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:43,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:43,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:43,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:55:43,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:43,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529088582] [2021-10-28 22:55:43,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529088582] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:43,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:43,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-10-28 22:55:43,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018396414] [2021-10-28 22:55:43,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-28 22:55:43,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:43,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-28 22:55:43,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:55:43,399 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) [2021-10-28 22:55:43,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:43,925 INFO L93 Difference]: Finished difference Result 142 states and 163 transitions. [2021-10-28 22:55:43,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 22:55:43,926 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 [2021-10-28 22:55:43,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:43,933 INFO L225 Difference]: With dead ends: 142 [2021-10-28 22:55:43,933 INFO L226 Difference]: Without dead ends: 142 [2021-10-28 22:55:43,940 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-10-28 22:55:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-28 22:55:43,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 123. [2021-10-28 22:55:43,947 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) [2021-10-28 22:55:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2021-10-28 22:55:43,949 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 38 [2021-10-28 22:55:43,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:43,949 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2021-10-28 22:55:43,950 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) [2021-10-28 22:55:43,950 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2021-10-28 22:55:43,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-28 22:55:43,951 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:43,951 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:43,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-28 22:55:43,952 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)] === [2021-10-28 22:55:43,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:43,952 INFO L85 PathProgramCache]: Analyzing trace with hash -826080384, now seen corresponding path program 1 times [2021-10-28 22:55:43,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:43,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782519217] [2021-10-28 22:55:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:43,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:44,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:44,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:44,268 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:55:44,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:44,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782519217] [2021-10-28 22:55:44,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782519217] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:44,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:44,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-10-28 22:55:44,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41082335] [2021-10-28 22:55:44,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 22:55:44,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:44,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 22:55:44,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:55:44,271 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) [2021-10-28 22:55:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:45,141 INFO L93 Difference]: Finished difference Result 141 states and 161 transitions. [2021-10-28 22:55:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-28 22:55:45,142 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 [2021-10-28 22:55:45,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:45,143 INFO L225 Difference]: With dead ends: 141 [2021-10-28 22:55:45,144 INFO L226 Difference]: Without dead ends: 141 [2021-10-28 22:55:45,144 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-10-28 22:55:45,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-10-28 22:55:45,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 123. [2021-10-28 22:55:45,149 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) [2021-10-28 22:55:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2021-10-28 22:55:45,151 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 39 [2021-10-28 22:55:45,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:45,151 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2021-10-28 22:55:45,151 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) [2021-10-28 22:55:45,152 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2021-10-28 22:55:45,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 22:55:45,153 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:45,153 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:45,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-28 22:55:45,154 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)] === [2021-10-28 22:55:45,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:45,154 INFO L85 PathProgramCache]: Analyzing trace with hash 161311941, now seen corresponding path program 1 times [2021-10-28 22:55:45,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:45,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165923614] [2021-10-28 22:55:45,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:45,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:45,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:45,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:45,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-28 22:55:45,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:45,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165923614] [2021-10-28 22:55:45,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165923614] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:45,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:45,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-28 22:55:45,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184247270] [2021-10-28 22:55:45,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-28 22:55:45,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:45,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 22:55:45,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:55:45,401 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) [2021-10-28 22:55:46,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:46,054 INFO L93 Difference]: Finished difference Result 138 states and 159 transitions. [2021-10-28 22:55:46,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 22:55:46,055 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 [2021-10-28 22:55:46,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:46,056 INFO L225 Difference]: With dead ends: 138 [2021-10-28 22:55:46,057 INFO L226 Difference]: Without dead ends: 138 [2021-10-28 22:55:46,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-10-28 22:55:46,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-28 22:55:46,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 123. [2021-10-28 22:55:46,062 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) [2021-10-28 22:55:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 144 transitions. [2021-10-28 22:55:46,063 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 144 transitions. Word has length 40 [2021-10-28 22:55:46,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:46,063 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 144 transitions. [2021-10-28 22:55:46,065 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) [2021-10-28 22:55:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 144 transitions. [2021-10-28 22:55:46,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 22:55:46,066 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:46,066 INFO L513 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] [2021-10-28 22:55:46,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-28 22:55:46,067 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)] === [2021-10-28 22:55:46,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:46,068 INFO L85 PathProgramCache]: Analyzing trace with hash 649158825, now seen corresponding path program 2 times [2021-10-28 22:55:46,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:46,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170610536] [2021-10-28 22:55:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:46,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:46,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:46,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:46,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:46,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170610536] [2021-10-28 22:55:46,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170610536] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:46,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094603626] [2021-10-28 22:55:46,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:55:46,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:46,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:46,217 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:46,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 22:55:46,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:55:46,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:55:46,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 22:55:46,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:46,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094603626] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:46,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:46,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2021-10-28 22:55:46,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192025935] [2021-10-28 22:55:46,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:55:46,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:46,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:55:46,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:55:46,751 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) [2021-10-28 22:55:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:46,988 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2021-10-28 22:55:46,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:55:46,988 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 [2021-10-28 22:55:46,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:46,989 INFO L225 Difference]: With dead ends: 93 [2021-10-28 22:55:46,989 INFO L226 Difference]: Without dead ends: 82 [2021-10-28 22:55:46,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-28 22:55:46,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-28 22:55:46,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2021-10-28 22:55:46,993 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) [2021-10-28 22:55:46,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-10-28 22:55:46,994 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 40 [2021-10-28 22:55:46,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:46,995 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-10-28 22:55:46,995 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) [2021-10-28 22:55:46,995 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-10-28 22:55:46,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-28 22:55:46,996 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:46,996 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:47,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:47,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:47,212 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)] === [2021-10-28 22:55:47,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:47,213 INFO L85 PathProgramCache]: Analyzing trace with hash 705702947, now seen corresponding path program 1 times [2021-10-28 22:55:47,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:47,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981675225] [2021-10-28 22:55:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:47,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:47,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:47,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 22:55:47,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:47,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981675225] [2021-10-28 22:55:47,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981675225] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:47,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:47,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 22:55:47,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832359258] [2021-10-28 22:55:47,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:55:47,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:47,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:55:47,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:55:47,432 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) [2021-10-28 22:55:47,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:47,845 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2021-10-28 22:55:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 22:55:47,846 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 [2021-10-28 22:55:47,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:47,846 INFO L225 Difference]: With dead ends: 81 [2021-10-28 22:55:47,847 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 22:55:47,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-10-28 22:55:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 22:55:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-10-28 22:55:47,851 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) [2021-10-28 22:55:47,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-10-28 22:55:47,852 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 41 [2021-10-28 22:55:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:47,853 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-10-28 22:55:47,853 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) [2021-10-28 22:55:47,853 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-10-28 22:55:47,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-28 22:55:47,854 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:47,854 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:47,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-28 22:55:47,855 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)] === [2021-10-28 22:55:47,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:47,855 INFO L85 PathProgramCache]: Analyzing trace with hash -237952112, now seen corresponding path program 1 times [2021-10-28 22:55:47,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:47,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405804345] [2021-10-28 22:55:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:47,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:47,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:47,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:47,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 22:55:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:47,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 22:55:47,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:47,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405804345] [2021-10-28 22:55:47,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405804345] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:55:47,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:55:47,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 22:55:47,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485242537] [2021-10-28 22:55:47,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:55:47,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:47,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:55:47,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:55:47,988 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) [2021-10-28 22:55:48,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:48,296 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-10-28 22:55:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:55:48,297 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 [2021-10-28 22:55:48,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:48,298 INFO L225 Difference]: With dead ends: 79 [2021-10-28 22:55:48,298 INFO L226 Difference]: Without dead ends: 79 [2021-10-28 22:55:48,299 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-28 22:55:48,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-28 22:55:48,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2021-10-28 22:55:48,301 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) [2021-10-28 22:55:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-10-28 22:55:48,302 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 46 [2021-10-28 22:55:48,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:48,303 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-10-28 22:55:48,303 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) [2021-10-28 22:55:48,303 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-10-28 22:55:48,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-28 22:55:48,303 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:48,305 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:55:48,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-28 22:55:48,305 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)] === [2021-10-28 22:55:48,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:48,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1038711118, now seen corresponding path program 1 times [2021-10-28 22:55:48,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:48,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930013812] [2021-10-28 22:55:48,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:48,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:48,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:48,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:48,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 22:55:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 22:55:48,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:48,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930013812] [2021-10-28 22:55:48,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930013812] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:48,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480338854] [2021-10-28 22:55:48,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:48,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:48,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:48,453 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:48,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 22:55:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:48,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 22:55:48,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:49,049 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 22:55:49,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480338854] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:49,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:49,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2021-10-28 22:55:49,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054359172] [2021-10-28 22:55:49,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 22:55:49,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:49,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 22:55:49,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:55:49,052 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) [2021-10-28 22:55:49,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:49,283 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2021-10-28 22:55:49,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:55:49,287 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 [2021-10-28 22:55:49,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:49,289 INFO L225 Difference]: With dead ends: 81 [2021-10-28 22:55:49,289 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 22:55:49,289 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:55:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 22:55:49,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-10-28 22:55:49,292 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) [2021-10-28 22:55:49,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-10-28 22:55:49,293 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 48 [2021-10-28 22:55:49,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:49,293 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-10-28 22:55:49,294 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) [2021-10-28 22:55:49,294 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-10-28 22:55:49,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 22:55:49,294 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:49,294 INFO L513 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] [2021-10-28 22:55:49,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:49,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:49,520 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)] === [2021-10-28 22:55:49,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:49,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2131651961, now seen corresponding path program 1 times [2021-10-28 22:55:49,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:49,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449769217] [2021-10-28 22:55:49,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:49,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:49,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:49,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:49,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 22:55:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:50,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:50,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449769217] [2021-10-28 22:55:50,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449769217] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:50,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045223852] [2021-10-28 22:55:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:50,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:50,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:50,672 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:50,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 22:55:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:51,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-28 22:55:51,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:55:51,165 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 [2021-10-28 22:55:51,489 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 [2021-10-28 22:55:51,495 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 [2021-10-28 22:55:51,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:55:51,598 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 [2021-10-28 22:55:51,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:55:51,611 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 [2021-10-28 22:55:51,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:55:51,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 22:55:51,781 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-28 22:55:51,781 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 [2021-10-28 22:55:51,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:55:51,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 22:55:51,798 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-10-28 22:55:51,799 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 [2021-10-28 22:55:52,256 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-10-28 22:55:52,256 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 [2021-10-28 22:55:53,405 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-28 22:55:53,406 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 [2021-10-28 22:55:53,832 INFO L354 Elim1Store]: treesize reduction 271, result has 11.4 percent of original size [2021-10-28 22:55:53,832 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 [2021-10-28 22:55:53,853 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-10-28 22:55:53,854 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 [2021-10-28 22:55:54,756 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-28 22:55:54,758 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 [2021-10-28 22:55:54,860 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:54,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045223852] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:54,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:55:54,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2021-10-28 22:55:54,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389473302] [2021-10-28 22:55:54,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-28 22:55:54,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:55:54,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-28 22:55:54,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2406, Unknown=0, NotChecked=0, Total=2550 [2021-10-28 22:55:54,864 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) [2021-10-28 22:55:58,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:55:58,388 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2021-10-28 22:55:58,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-28 22:55:58,390 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 [2021-10-28 22:55:58,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:55:58,391 INFO L225 Difference]: With dead ends: 101 [2021-10-28 22:55:58,391 INFO L226 Difference]: Without dead ends: 101 [2021-10-28 22:55:58,393 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=449, Invalid=5251, Unknown=0, NotChecked=0, Total=5700 [2021-10-28 22:55:58,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-28 22:55:58,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2021-10-28 22:55:58,397 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) [2021-10-28 22:55:58,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-10-28 22:55:58,398 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 49 [2021-10-28 22:55:58,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:55:58,398 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-10-28 22:55:58,399 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) [2021-10-28 22:55:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-10-28 22:55:58,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-28 22:55:58,400 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:55:58,400 INFO L513 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] [2021-10-28 22:55:58,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 22:55:58,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:58,612 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)] === [2021-10-28 22:55:58,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:55:58,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2131651960, now seen corresponding path program 1 times [2021-10-28 22:55:58,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:55:58,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910611437] [2021-10-28 22:55:58,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:58,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:55:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:58,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:55:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:58,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:55:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:59,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 22:55:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:55:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:55:59,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:55:59,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910611437] [2021-10-28 22:55:59,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910611437] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:55:59,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253666943] [2021-10-28 22:55:59,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:55:59,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:55:59,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:55:59,524 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:55:59,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 22:56:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:00,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 72 conjunts are in the unsatisfiable core [2021-10-28 22:56:00,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:00,072 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 [2021-10-28 22:56:00,143 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:56:00,143 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 [2021-10-28 22:56:00,186 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 [2021-10-28 22:56:00,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:00,280 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 [2021-10-28 22:56:00,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 22:56:00,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:00,392 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-28 22:56:00,393 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 [2021-10-28 22:56:01,404 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 [2021-10-28 22:56:01,415 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 [2021-10-28 22:56:01,528 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 [2021-10-28 22:56:01,555 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-10-28 22:56:01,556 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 [2021-10-28 22:56:01,842 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 [2021-10-28 22:56:01,846 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 [2021-10-28 22:56:01,889 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:01,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253666943] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:01,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:01,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 42 [2021-10-28 22:56:01,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494321671] [2021-10-28 22:56:01,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-28 22:56:01,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:01,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-28 22:56:01,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1687, Unknown=0, NotChecked=0, Total=1806 [2021-10-28 22:56:01,892 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) [2021-10-28 22:56:04,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:04,842 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2021-10-28 22:56:04,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-28 22:56:04,849 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 [2021-10-28 22:56:04,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:04,850 INFO L225 Difference]: With dead ends: 118 [2021-10-28 22:56:04,850 INFO L226 Difference]: Without dead ends: 118 [2021-10-28 22:56:04,852 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=424, Invalid=4406, Unknown=0, NotChecked=0, Total=4830 [2021-10-28 22:56:04,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-28 22:56:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2021-10-28 22:56:04,856 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) [2021-10-28 22:56:04,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2021-10-28 22:56:04,857 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 49 [2021-10-28 22:56:04,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:04,858 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2021-10-28 22:56:04,858 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) [2021-10-28 22:56:04,859 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2021-10-28 22:56:04,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-28 22:56:04,859 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:04,860 INFO L513 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] [2021-10-28 22:56:04,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:05,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 22:56:05,076 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)] === [2021-10-28 22:56:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:05,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1342859665, now seen corresponding path program 1 times [2021-10-28 22:56:05,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:05,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926341709] [2021-10-28 22:56:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:05,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:05,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:05,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:56:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:06,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 22:56:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:07,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:07,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926341709] [2021-10-28 22:56:07,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926341709] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:07,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142451953] [2021-10-28 22:56:07,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:07,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:07,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:07,593 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:07,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 22:56:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:08,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 104 conjunts are in the unsatisfiable core [2021-10-28 22:56:08,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:08,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 22:56:08,430 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 [2021-10-28 22:56:08,438 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 [2021-10-28 22:56:08,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:08,557 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 [2021-10-28 22:56:08,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:08,568 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 [2021-10-28 22:56:08,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:08,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-10-28 22:56:08,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:09,000 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 [2021-10-28 22:56:09,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:09,039 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 [2021-10-28 22:56:09,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:09,065 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 [2021-10-28 22:56:09,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:09,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:09,230 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 [2021-10-28 22:56:09,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:09,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:09,250 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 [2021-10-28 22:56:09,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:09,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 22:56:09,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 22:56:09,493 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-10-28 22:56:09,494 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 [2021-10-28 22:56:09,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:09,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 22:56:09,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 22:56:09,515 INFO L354 Elim1Store]: treesize reduction 59, result has 13.2 percent of original size [2021-10-28 22:56:09,516 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 [2021-10-28 22:56:10,155 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-10-28 22:56:10,156 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 [2021-10-28 22:56:11,862 INFO L354 Elim1Store]: treesize reduction 321, result has 11.6 percent of original size [2021-10-28 22:56:11,862 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 [2021-10-28 22:56:11,939 INFO L354 Elim1Store]: treesize reduction 349, result has 10.3 percent of original size [2021-10-28 22:56:11,940 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 [2021-10-28 22:56:12,914 INFO L354 Elim1Store]: treesize reduction 99, result has 7.5 percent of original size [2021-10-28 22:56:12,914 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 [2021-10-28 22:56:12,934 INFO L354 Elim1Store]: treesize reduction 66, result has 4.3 percent of original size [2021-10-28 22:56:12,934 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 [2021-10-28 22:56:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:12,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142451953] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:12,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:12,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 57 [2021-10-28 22:56:12,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270097337] [2021-10-28 22:56:12,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-10-28 22:56:12,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:12,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-10-28 22:56:12,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3049, Unknown=0, NotChecked=0, Total=3192 [2021-10-28 22:56:12,957 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) [2021-10-28 22:56:21,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:21,254 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-10-28 22:56:21,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-28 22:56:21,255 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 [2021-10-28 22:56:21,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:21,256 INFO L225 Difference]: With dead ends: 100 [2021-10-28 22:56:21,257 INFO L226 Difference]: Without dead ends: 100 [2021-10-28 22:56:21,260 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=467, Invalid=7543, Unknown=0, NotChecked=0, Total=8010 [2021-10-28 22:56:21,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-28 22:56:21,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 87. [2021-10-28 22:56:21,264 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) [2021-10-28 22:56:21,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2021-10-28 22:56:21,265 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 52 [2021-10-28 22:56:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:21,265 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2021-10-28 22:56:21,266 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) [2021-10-28 22:56:21,266 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2021-10-28 22:56:21,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-28 22:56:21,267 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:21,267 INFO L513 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] [2021-10-28 22:56:21,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:21,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 22:56:21,480 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)] === [2021-10-28 22:56:21,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:21,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1321018351, now seen corresponding path program 1 times [2021-10-28 22:56:21,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:21,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61006560] [2021-10-28 22:56:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:21,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:21,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:21,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:56:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:21,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 22:56:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:22,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:22,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61006560] [2021-10-28 22:56:22,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61006560] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:22,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742736565] [2021-10-28 22:56:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:22,297 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:22,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:22,298 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:22,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 22:56:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:22,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-28 22:56:22,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:23,011 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 [2021-10-28 22:56:23,073 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:56:23,074 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 [2021-10-28 22:56:23,112 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 [2021-10-28 22:56:23,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:23,166 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 [2021-10-28 22:56:23,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:23,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-28 22:56:23,254 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-10-28 22:56:23,254 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 [2021-10-28 22:56:24,053 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 [2021-10-28 22:56:24,126 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 [2021-10-28 22:56:24,146 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-10-28 22:56:24,147 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 [2021-10-28 22:56:24,334 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 [2021-10-28 22:56:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:24,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742736565] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:24,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:24,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 40 [2021-10-28 22:56:24,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645290778] [2021-10-28 22:56:24,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 22:56:24,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:24,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 22:56:24,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 22:56:24,341 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) [2021-10-28 22:56:27,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:27,664 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2021-10-28 22:56:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-28 22:56:27,666 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 [2021-10-28 22:56:27,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:27,667 INFO L225 Difference]: With dead ends: 128 [2021-10-28 22:56:27,667 INFO L226 Difference]: Without dead ends: 128 [2021-10-28 22:56:27,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=647, Invalid=5515, Unknown=0, NotChecked=0, Total=6162 [2021-10-28 22:56:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-28 22:56:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2021-10-28 22:56:27,673 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) [2021-10-28 22:56:27,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2021-10-28 22:56:27,675 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 53 [2021-10-28 22:56:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:27,675 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2021-10-28 22:56:27,676 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) [2021-10-28 22:56:27,676 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2021-10-28 22:56:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-28 22:56:27,677 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:27,677 INFO L513 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] [2021-10-28 22:56:27,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:27,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-28 22:56:27,904 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)] === [2021-10-28 22:56:27,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:27,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1998104146, now seen corresponding path program 1 times [2021-10-28 22:56:27,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:27,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337716802] [2021-10-28 22:56:27,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:27,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:28,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:28,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:56:28,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:28,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 22:56:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:28,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:28,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337716802] [2021-10-28 22:56:28,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337716802] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:28,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949665703] [2021-10-28 22:56:28,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:28,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:28,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:28,856 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:28,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 22:56:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:29,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-28 22:56:29,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:29,710 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 [2021-10-28 22:56:29,779 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 22:56:29,779 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 [2021-10-28 22:56:29,812 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 [2021-10-28 22:56:29,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:29,866 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 [2021-10-28 22:56:29,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:29,967 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-28 22:56:29,967 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 [2021-10-28 22:56:30,501 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-10-28 22:56:30,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-10-28 22:56:30,780 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 [2021-10-28 22:56:30,850 INFO L354 Elim1Store]: treesize reduction 106, result has 2.8 percent of original size [2021-10-28 22:56:30,851 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 [2021-10-28 22:56:30,855 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 [2021-10-28 22:56:31,039 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 [2021-10-28 22:56:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:56:31,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949665703] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:31,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:31,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 40 [2021-10-28 22:56:31,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935914618] [2021-10-28 22:56:31,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-28 22:56:31,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:31,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-28 22:56:31,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1534, Unknown=0, NotChecked=0, Total=1640 [2021-10-28 22:56:31,048 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) [2021-10-28 22:56:33,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:33,910 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2021-10-28 22:56:33,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-28 22:56:33,911 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 [2021-10-28 22:56:33,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:33,912 INFO L225 Difference]: With dead ends: 114 [2021-10-28 22:56:33,912 INFO L226 Difference]: Without dead ends: 114 [2021-10-28 22:56:33,914 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=407, Invalid=4015, Unknown=0, NotChecked=0, Total=4422 [2021-10-28 22:56:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-28 22:56:33,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2021-10-28 22:56:33,918 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) [2021-10-28 22:56:33,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2021-10-28 22:56:33,920 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 54 [2021-10-28 22:56:33,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:33,921 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2021-10-28 22:56:33,922 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) [2021-10-28 22:56:33,922 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2021-10-28 22:56:33,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-28 22:56:33,923 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:33,923 INFO L513 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] [2021-10-28 22:56:33,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:34,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:34,144 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)] === [2021-10-28 22:56:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:34,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1811686451, now seen corresponding path program 1 times [2021-10-28 22:56:34,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:34,145 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926789611] [2021-10-28 22:56:34,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:34,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:34,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:34,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:56:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:34,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 22:56:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 22:56:34,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:34,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926789611] [2021-10-28 22:56:34,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926789611] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:34,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646618451] [2021-10-28 22:56:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:34,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:34,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:34,267 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:34,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 22:56:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:35,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 22:56:35,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:35,283 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 [2021-10-28 22:56:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-28 22:56:35,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646618451] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:35,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:56:35,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-10-28 22:56:35,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861444458] [2021-10-28 22:56:35,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:56:35,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:35,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:56:35,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:56:35,292 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) [2021-10-28 22:56:35,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:35,361 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-10-28 22:56:35,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:56:35,361 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 [2021-10-28 22:56:35,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:35,362 INFO L225 Difference]: With dead ends: 111 [2021-10-28 22:56:35,362 INFO L226 Difference]: Without dead ends: 111 [2021-10-28 22:56:35,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:56:35,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-10-28 22:56:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2021-10-28 22:56:35,367 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) [2021-10-28 22:56:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2021-10-28 22:56:35,368 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 55 [2021-10-28 22:56:35,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:35,368 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2021-10-28 22:56:35,369 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) [2021-10-28 22:56:35,369 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2021-10-28 22:56:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-28 22:56:35,370 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:35,370 INFO L513 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] [2021-10-28 22:56:35,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:35,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:35,588 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)] === [2021-10-28 22:56:35,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:35,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2026508256, now seen corresponding path program 1 times [2021-10-28 22:56:35,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:35,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54446306] [2021-10-28 22:56:35,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:35,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:35,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:35,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:56:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:35,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 22:56:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:35,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 22:56:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:35,767 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 22:56:35,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:35,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54446306] [2021-10-28 22:56:35,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54446306] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:35,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:56:35,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-28 22:56:35,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742764252] [2021-10-28 22:56:35,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:56:35,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:35,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:56:35,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:56:35,770 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) [2021-10-28 22:56:36,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:36,317 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2021-10-28 22:56:36,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 22:56:36,318 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 [2021-10-28 22:56:36,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:36,321 INFO L225 Difference]: With dead ends: 144 [2021-10-28 22:56:36,322 INFO L226 Difference]: Without dead ends: 144 [2021-10-28 22:56:36,324 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-10-28 22:56:36,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-28 22:56:36,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 116. [2021-10-28 22:56:36,331 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) [2021-10-28 22:56:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2021-10-28 22:56:36,333 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 63 [2021-10-28 22:56:36,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:36,336 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2021-10-28 22:56:36,336 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) [2021-10-28 22:56:36,336 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2021-10-28 22:56:36,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-28 22:56:36,337 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:36,338 INFO L513 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] [2021-10-28 22:56:36,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-28 22:56:36,338 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)] === [2021-10-28 22:56:36,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:36,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2026508191, now seen corresponding path program 1 times [2021-10-28 22:56:36,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:36,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615715922] [2021-10-28 22:56:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:36,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:36,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:36,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:56:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:37,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 22:56:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:37,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 22:56:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 22:56:38,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:38,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615715922] [2021-10-28 22:56:38,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615715922] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:38,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531367973] [2021-10-28 22:56:38,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:38,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:38,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:56:38,103 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:56:38,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 22:56:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:38,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 93 conjunts are in the unsatisfiable core [2021-10-28 22:56:38,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:56:39,244 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 [2021-10-28 22:56:39,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:39,330 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 [2021-10-28 22:56:39,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 22:56:39,465 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-28 22:56:39,466 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 [2021-10-28 22:56:41,212 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 [2021-10-28 22:56:41,484 INFO L354 Elim1Store]: treesize reduction 406, result has 11.7 percent of original size [2021-10-28 22:56:41,484 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 [2021-10-28 22:56:41,490 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 [2021-10-28 22:56:42,704 INFO L354 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2021-10-28 22:56:42,704 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 [2021-10-28 22:56:42,709 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 [2021-10-28 22:56:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 22:56:43,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531367973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:56:43,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:56:43,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 55 [2021-10-28 22:56:43,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002836400] [2021-10-28 22:56:43,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-28 22:56:43,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:43,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-28 22:56:43,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2911, Unknown=0, NotChecked=0, Total=3080 [2021-10-28 22:56:43,222 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) [2021-10-28 22:56:46,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:46,798 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2021-10-28 22:56:46,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-28 22:56:46,799 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 [2021-10-28 22:56:46,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:46,800 INFO L225 Difference]: With dead ends: 124 [2021-10-28 22:56:46,800 INFO L226 Difference]: Without dead ends: 121 [2021-10-28 22:56:46,803 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=371, Invalid=5179, Unknown=0, NotChecked=0, Total=5550 [2021-10-28 22:56:46,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-28 22:56:46,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2021-10-28 22:56:46,807 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) [2021-10-28 22:56:46,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2021-10-28 22:56:46,809 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 63 [2021-10-28 22:56:46,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:46,809 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2021-10-28 22:56:46,810 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) [2021-10-28 22:56:46,810 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2021-10-28 22:56:46,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-28 22:56:46,811 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:56:46,811 INFO L513 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] [2021-10-28 22:56:46,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-28 22:56:47,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:56:47,024 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)] === [2021-10-28 22:56:47,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:56:47,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1606375129, now seen corresponding path program 1 times [2021-10-28 22:56:47,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:56:47,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822523877] [2021-10-28 22:56:47,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:56:47,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:56:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:47,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:56:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:47,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-10-28 22:56:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:47,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-10-28 22:56:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:47,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-10-28 22:56:47,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:56:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-28 22:56:47,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:56:47,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822523877] [2021-10-28 22:56:47,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822523877] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:56:47,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:56:47,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-28 22:56:47,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16872469] [2021-10-28 22:56:47,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 22:56:47,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:56:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 22:56:47,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:56:47,198 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) [2021-10-28 22:56:47,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:56:47,331 INFO L93 Difference]: Finished difference Result 60 states and 59 transitions. [2021-10-28 22:56:47,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:56:47,332 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 [2021-10-28 22:56:47,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:56:47,332 INFO L225 Difference]: With dead ends: 60 [2021-10-28 22:56:47,332 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 22:56:47,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-10-28 22:56:47,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 22:56:47,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 22:56:47,333 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) [2021-10-28 22:56:47,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 22:56:47,333 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 64 [2021-10-28 22:56:47,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:56:47,333 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 22:56:47,334 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) [2021-10-28 22:56:47,334 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 22:56:47,334 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 22:56:47,336 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr0REQUIRES_VIOLATION [2021-10-28 22:56:47,337 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr1REQUIRES_VIOLATION [2021-10-28 22:56:47,337 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr2REQUIRES_VIOLATION [2021-10-28 22:56:47,337 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr3REQUIRES_VIOLATION [2021-10-28 22:56:47,337 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr4REQUIRES_VIOLATION [2021-10-28 22:56:47,337 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr5REQUIRES_VIOLATION [2021-10-28 22:56:47,338 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr6REQUIRES_VIOLATION [2021-10-28 22:56:47,338 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr7REQUIRES_VIOLATION [2021-10-28 22:56:47,338 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:56:47,338 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:56:47,339 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE [2021-10-28 22:56:47,339 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr11REQUIRES_VIOLATION [2021-10-28 22:56:47,339 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr12REQUIRES_VIOLATION [2021-10-28 22:56:47,339 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-10-28 22:56:47,339 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-10-28 22:56:47,340 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-10-28 22:56:47,340 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-10-28 22:56:47,340 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr4REQUIRES_VIOLATION [2021-10-28 22:56:47,340 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr5REQUIRES_VIOLATION [2021-10-28 22:56:47,340 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 22:56:47,340 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-28 22:56:47,340 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 22:56:47,340 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 22:56:47,340 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr0REQUIRES_VIOLATION [2021-10-28 22:56:47,341 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr1REQUIRES_VIOLATION [2021-10-28 22:56:47,341 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr2REQUIRES_VIOLATION [2021-10-28 22:56:47,341 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr3REQUIRES_VIOLATION [2021-10-28 22:56:47,341 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr4REQUIRES_VIOLATION [2021-10-28 22:56:47,341 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr5REQUIRES_VIOLATION [2021-10-28 22:56:47,341 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr6REQUIRES_VIOLATION [2021-10-28 22:56:47,341 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr7REQUIRES_VIOLATION [2021-10-28 22:56:47,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-28 22:56:47,344 INFO L731 BasicCegarLoop]: Path program histogram: [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] [2021-10-28 22:56:47,346 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 22:56:47,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:56:47 BoogieIcfgContainer [2021-10-28 22:56:47,349 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 22:56:47,350 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 22:56:47,350 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 22:56:47,350 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 22:56:47,351 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:55:15" (3/4) ... [2021-10-28 22:56:47,354 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 22:56:47,362 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-10-28 22:56:47,362 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 22:56:47,362 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-10-28 22:56:47,363 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_create [2021-10-28 22:56:47,363 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-10-28 22:56:47,363 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-10-28 22:56:47,363 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 22:56:47,364 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-10-28 22:56:47,364 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_remove_first [2021-10-28 22:56:47,369 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-10-28 22:56:47,370 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-28 22:56:47,370 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-28 22:56:47,371 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 22:56:47,416 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 22:56:47,417 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 22:56:47,418 INFO L168 Benchmark]: Toolchain (without parser) took 93539.00 ms. Allocated memory was 109.1 MB in the beginning and 281.0 MB in the end (delta: 172.0 MB). Free memory was 69.4 MB in the beginning and 131.5 MB in the end (delta: -62.2 MB). Peak memory consumption was 108.9 MB. Max. memory is 16.1 GB. [2021-10-28 22:56:47,418 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 109.1 MB. Free memory is still 86.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:56:47,419 INFO L168 Benchmark]: CACSL2BoogieTranslator took 687.47 ms. Allocated memory is still 109.1 MB. Free memory was 69.1 MB in the beginning and 75.9 MB in the end (delta: -6.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 22:56:47,419 INFO L168 Benchmark]: Boogie Preprocessor took 113.35 ms. Allocated memory is still 109.1 MB. Free memory was 75.9 MB in the beginning and 73.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 22:56:47,419 INFO L168 Benchmark]: RCFGBuilder took 932.08 ms. Allocated memory is still 109.1 MB. Free memory was 73.3 MB in the beginning and 49.8 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:56:47,420 INFO L168 Benchmark]: TraceAbstraction took 91731.63 ms. Allocated memory was 109.1 MB in the beginning and 281.0 MB in the end (delta: 172.0 MB). Free memory was 49.4 MB in the beginning and 135.7 MB in the end (delta: -86.3 MB). Peak memory consumption was 88.0 MB. Max. memory is 16.1 GB. [2021-10-28 22:56:47,420 INFO L168 Benchmark]: Witness Printer took 67.26 ms. Allocated memory is still 281.0 MB. Free memory was 134.7 MB in the beginning and 131.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 22:56:47,422 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 109.1 MB. Free memory is still 86.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 687.47 ms. Allocated memory is still 109.1 MB. Free memory was 69.1 MB in the beginning and 75.9 MB in the end (delta: -6.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 113.35 ms. Allocated memory is still 109.1 MB. Free memory was 75.9 MB in the beginning and 73.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 932.08 ms. Allocated memory is still 109.1 MB. Free memory was 73.3 MB in the beginning and 49.8 MB in the end (delta: 23.5 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 91731.63 ms. Allocated memory was 109.1 MB in the beginning and 281.0 MB in the end (delta: 172.0 MB). Free memory was 49.4 MB in the beginning and 135.7 MB in the end (delta: -86.3 MB). Peak memory consumption was 88.0 MB. Max. memory is 16.1 GB. * Witness Printer took 67.26 ms. Allocated memory is still 281.0 MB. Free memory was 134.7 MB in the beginning and 131.5 MB in the end (delta: 3.1 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, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s 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: 91.6s, OverallIterations: 31, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 41.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 1123 SDtfs, 3740 SDslu, 5985 SDs, 0 SdLazy, 20837 SolverSat, 756 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 16.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1532 GetRequests, 671 SyntacticMatches, 18 SemanticMatches, 843 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8086 ImplicationChecksByTransitivity, 38.6s Time, 0.0s 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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 31 MinimizatonAttempts, 442 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 37.2s 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! [2021-10-28 22:56:47,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c421e70-bd3b-42a0-8ad0-1cc20e91f58b/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...