./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3 --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 af5a9640b82bb5981acfe21e6355734b41317c49 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3 --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 af5a9640b82bb5981acfe21e6355734b41317c49 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:08:45,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:08:45,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:08:45,270 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:08:45,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:08:45,277 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:08:45,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:08:45,285 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:08:45,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:08:45,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:08:45,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:08:45,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:08:45,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:08:45,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:08:45,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:08:45,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:08:45,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:08:45,316 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:08:45,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:08:45,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:08:45,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:08:45,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:08:45,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:08:45,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:08:45,342 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:08:45,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:08:45,343 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:08:45,344 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:08:45,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:08:45,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:08:45,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:08:45,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:08:45,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:08:45,350 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:08:45,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:08:45,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:08:45,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:08:45,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:08:45,353 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:08:45,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:08:45,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:08:45,356 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-15 20:08:45,383 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:08:45,383 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:08:45,384 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:08:45,384 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:08:45,385 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:08:45,385 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:08:45,386 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:08:45,386 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:08:45,386 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:08:45,386 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 20:08:45,387 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:08:45,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:08:45,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:08:45,387 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-15 20:08:45,388 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-15 20:08:45,388 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-15 20:08:45,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:08:45,388 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-15 20:08:45,388 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:08:45,389 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:08:45,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:08:45,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:08:45,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:08:45,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:08:45,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:08:45,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:08:45,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-15 20:08:45,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-15 20:08:45,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:08:45,391 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_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af5a9640b82bb5981acfe21e6355734b41317c49 [2021-10-15 20:08:45,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:08:45,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:08:45,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:08:45,767 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:08:45,771 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:08:45,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2021-10-15 20:08:45,857 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/data/840d98c74/eaa0c459a56a4e19a6026057628f4f55/FLAG1aa474cdb [2021-10-15 20:08:46,524 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:08:46,525 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2021-10-15 20:08:46,563 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/data/840d98c74/eaa0c459a56a4e19a6026057628f4f55/FLAG1aa474cdb [2021-10-15 20:08:46,758 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/data/840d98c74/eaa0c459a56a4e19a6026057628f4f55 [2021-10-15 20:08:46,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:08:46,768 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-15 20:08:46,773 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:08:46,773 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:08:46,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:08:46,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:08:46" (1/1) ... [2021-10-15 20:08:46,780 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40af0bbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:46, skipping insertion in model container [2021-10-15 20:08:46,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:08:46" (1/1) ... [2021-10-15 20:08:46,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:08:46,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:08:47,304 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_75f5c7fe-35d5-4bc4-a374-13e5019171d7/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i[22778,22791] [2021-10-15 20:08:47,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:08:47,345 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:08:47,397 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_75f5c7fe-35d5-4bc4-a374-13e5019171d7/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i[22778,22791] [2021-10-15 20:08:47,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:08:47,437 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:08:47,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:47 WrapperNode [2021-10-15 20:08:47,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:08:47,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:08:47,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:08:47,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:08:47,454 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:47" (1/1) ... [2021-10-15 20:08:47,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:47" (1/1) ... [2021-10-15 20:08:47,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:47" (1/1) ... [2021-10-15 20:08:47,473 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:47" (1/1) ... [2021-10-15 20:08:47,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:47" (1/1) ... [2021-10-15 20:08:47,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:47" (1/1) ... [2021-10-15 20:08:47,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:47" (1/1) ... [2021-10-15 20:08:47,527 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:08:47,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:08:47,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:08:47,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:08:47,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:47" (1/1) ... [2021-10-15 20:08:47,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:08:47,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:47,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:08:47,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:08:47,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-15 20:08:47,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:08:47,663 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-15 20:08:47,663 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-15 20:08:47,663 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-15 20:08:47,665 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-15 20:08:47,665 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-15 20:08:47,665 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-15 20:08:47,665 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-15 20:08:47,668 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-15 20:08:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-15 20:08:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-15 20:08:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-15 20:08:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-15 20:08:47,669 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-15 20:08:47,670 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-15 20:08:47,670 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-15 20:08:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-15 20:08:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-15 20:08:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-15 20:08:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-15 20:08:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-15 20:08:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-15 20:08:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-15 20:08:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-15 20:08:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-15 20:08:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-15 20:08:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-15 20:08:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-15 20:08:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-15 20:08:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-15 20:08:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-15 20:08:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-15 20:08:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-15 20:08:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-15 20:08:47,674 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-15 20:08:47,674 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-15 20:08:47,674 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-15 20:08:47,674 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-15 20:08:47,674 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-15 20:08:47,674 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-15 20:08:47,674 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-15 20:08:47,675 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-15 20:08:47,675 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-15 20:08:47,675 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-15 20:08:47,675 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-15 20:08:47,675 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-15 20:08:47,675 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-15 20:08:47,676 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-15 20:08:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-15 20:08:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-15 20:08:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-15 20:08:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-15 20:08:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-15 20:08:47,677 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-15 20:08:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-15 20:08:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-15 20:08:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-15 20:08:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-15 20:08:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-15 20:08:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-15 20:08:47,678 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-15 20:08:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-15 20:08:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-15 20:08:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-15 20:08:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-15 20:08:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-15 20:08:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-15 20:08:47,679 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-15 20:08:47,680 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-15 20:08:47,680 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-15 20:08:47,680 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-15 20:08:47,680 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-15 20:08:47,680 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-15 20:08:47,680 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-15 20:08:47,680 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-15 20:08:47,681 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-15 20:08:47,681 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-15 20:08:47,681 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-15 20:08:47,681 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-15 20:08:47,681 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-15 20:08:47,681 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-15 20:08:47,681 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-15 20:08:47,682 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-15 20:08:47,682 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-15 20:08:47,682 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-15 20:08:47,682 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-15 20:08:47,682 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-15 20:08:47,682 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-15 20:08:47,682 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-15 20:08:47,683 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-15 20:08:47,683 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-15 20:08:47,683 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-15 20:08:47,683 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-15 20:08:47,683 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-15 20:08:47,683 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-15 20:08:47,683 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-15 20:08:47,683 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-15 20:08:47,684 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-15 20:08:47,684 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-15 20:08:47,684 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-15 20:08:47,684 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-15 20:08:47,684 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-15 20:08:47,684 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-15 20:08:47,684 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-15 20:08:47,684 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-15 20:08:47,685 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-15 20:08:47,685 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-15 20:08:47,685 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-15 20:08:47,685 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-15 20:08:47,685 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-15 20:08:47,685 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-15 20:08:47,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:08:47,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-15 20:08:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 20:08:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 20:08:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-15 20:08:47,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 20:08:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-15 20:08:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 20:08:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-15 20:08:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-15 20:08:47,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:08:48,560 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:08:48,561 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-15 20:08:48,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:08:48 BoogieIcfgContainer [2021-10-15 20:08:48,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:08:48,570 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:08:48,574 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:08:48,578 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:08:48,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:08:46" (1/3) ... [2021-10-15 20:08:48,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c004df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:08:48, skipping insertion in model container [2021-10-15 20:08:48,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:08:47" (2/3) ... [2021-10-15 20:08:48,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c004df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:08:48, skipping insertion in model container [2021-10-15 20:08:48,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:08:48" (3/3) ... [2021-10-15 20:08:48,586 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-simple-white-blue-2.i [2021-10-15 20:08:48,599 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:08:48,607 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2021-10-15 20:08:48,677 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:08:48,690 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 20:08:48,690 INFO L340 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2021-10-15 20:08:48,724 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 64 states have (on average 2.1875) internal successors, (140), 123 states have internal predecessors, (140), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:08:48,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-15 20:08:48,735 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:48,736 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:48,737 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:08:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:48,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1247820226, now seen corresponding path program 1 times [2021-10-15 20:08:48,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:48,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700567282] [2021-10-15 20:08:48,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:48,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:49,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:49,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:49,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700567282] [2021-10-15 20:08:49,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700567282] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:49,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:49,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:08:49,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25217237] [2021-10-15 20:08:49,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:08:49,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:49,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:08:49,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:08:49,168 INFO L87 Difference]: Start difference. First operand has 128 states, 64 states have (on average 2.1875) internal successors, (140), 123 states have internal predecessors, (140), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:49,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:49,713 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2021-10-15 20:08:49,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:08:49,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-15 20:08:49,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:49,732 INFO L225 Difference]: With dead ends: 154 [2021-10-15 20:08:49,733 INFO L226 Difference]: Without dead ends: 150 [2021-10-15 20:08:49,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:08:49,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-10-15 20:08:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 121. [2021-10-15 20:08:49,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 117 states have internal predecessors, (125), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:49,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 128 transitions. [2021-10-15 20:08:49,815 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 128 transitions. Word has length 7 [2021-10-15 20:08:49,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:49,816 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 128 transitions. [2021-10-15 20:08:49,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:49,816 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 128 transitions. [2021-10-15 20:08:49,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-15 20:08:49,817 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:49,817 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:49,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-15 20:08:49,818 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:08:49,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:49,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1247820225, now seen corresponding path program 1 times [2021-10-15 20:08:49,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:49,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403590207] [2021-10-15 20:08:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:49,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:49,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:49,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:49,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403590207] [2021-10-15 20:08:49,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403590207] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:49,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:49,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-15 20:08:49,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118200353] [2021-10-15 20:08:49,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:08:49,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:49,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:08:49,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:08:49,998 INFO L87 Difference]: Start difference. First operand 121 states and 128 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:50,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:50,386 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2021-10-15 20:08:50,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:08:50,387 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-15 20:08:50,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:50,392 INFO L225 Difference]: With dead ends: 147 [2021-10-15 20:08:50,393 INFO L226 Difference]: Without dead ends: 147 [2021-10-15 20:08:50,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:08:50,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-15 20:08:50,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2021-10-15 20:08:50,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 62 states have (on average 1.967741935483871) internal successors, (122), 114 states have internal predecessors, (122), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:50,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 125 transitions. [2021-10-15 20:08:50,419 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 125 transitions. Word has length 7 [2021-10-15 20:08:50,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:50,419 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 125 transitions. [2021-10-15 20:08:50,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:50,420 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 125 transitions. [2021-10-15 20:08:50,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-15 20:08:50,420 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:50,420 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:50,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-15 20:08:50,421 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:08:50,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:50,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2044142232, now seen corresponding path program 1 times [2021-10-15 20:08:50,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:50,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104180647] [2021-10-15 20:08:50,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:50,423 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:50,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:50,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:50,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:50,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:50,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104180647] [2021-10-15 20:08:50,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104180647] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:50,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:50,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:08:50,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912849224] [2021-10-15 20:08:50,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:08:50,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:50,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:08:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:08:50,631 INFO L87 Difference]: Start difference. First operand 118 states and 125 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:51,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:51,150 INFO L93 Difference]: Finished difference Result 200 states and 215 transitions. [2021-10-15 20:08:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:08:51,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-15 20:08:51,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:51,158 INFO L225 Difference]: With dead ends: 200 [2021-10-15 20:08:51,159 INFO L226 Difference]: Without dead ends: 200 [2021-10-15 20:08:51,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:08:51,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-10-15 20:08:51,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 155. [2021-10-15 20:08:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 102 states have (on average 1.9215686274509804) internal successors, (196), 151 states have internal predecessors, (196), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:51,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 199 transitions. [2021-10-15 20:08:51,182 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 199 transitions. Word has length 13 [2021-10-15 20:08:51,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:51,183 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 199 transitions. [2021-10-15 20:08:51,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:51,183 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 199 transitions. [2021-10-15 20:08:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-15 20:08:51,184 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:51,184 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:51,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-15 20:08:51,185 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:08:51,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:51,185 INFO L82 PathProgramCache]: Analyzing trace with hash -2044142233, now seen corresponding path program 1 times [2021-10-15 20:08:51,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:51,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787851915] [2021-10-15 20:08:51,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:51,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:51,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:51,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:51,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787851915] [2021-10-15 20:08:51,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787851915] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:51,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:51,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:08:51,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826168043] [2021-10-15 20:08:51,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:08:51,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:51,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:08:51,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:08:51,348 INFO L87 Difference]: Start difference. First operand 155 states and 199 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:51,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:51,630 INFO L93 Difference]: Finished difference Result 153 states and 180 transitions. [2021-10-15 20:08:51,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:08:51,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-10-15 20:08:51,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:51,632 INFO L225 Difference]: With dead ends: 153 [2021-10-15 20:08:51,633 INFO L226 Difference]: Without dead ends: 153 [2021-10-15 20:08:51,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:08:51,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-10-15 20:08:51,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 146. [2021-10-15 20:08:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 109 states have (on average 1.6055045871559632) internal successors, (175), 142 states have internal predecessors, (175), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:51,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 178 transitions. [2021-10-15 20:08:51,650 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 178 transitions. Word has length 13 [2021-10-15 20:08:51,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:51,651 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 178 transitions. [2021-10-15 20:08:51,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:51,651 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 178 transitions. [2021-10-15 20:08:51,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-15 20:08:51,652 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:51,652 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:51,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-15 20:08:51,653 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:08:51,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:51,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1300029695, now seen corresponding path program 1 times [2021-10-15 20:08:51,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:51,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381292990] [2021-10-15 20:08:51,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:51,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:51,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:51,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:51,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381292990] [2021-10-15 20:08:51,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381292990] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:51,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:51,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:08:51,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323810822] [2021-10-15 20:08:51,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:08:51,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:51,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:08:51,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:08:51,789 INFO L87 Difference]: Start difference. First operand 146 states and 178 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:52,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:52,087 INFO L93 Difference]: Finished difference Result 145 states and 176 transitions. [2021-10-15 20:08:52,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:08:52,088 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-15 20:08:52,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:52,090 INFO L225 Difference]: With dead ends: 145 [2021-10-15 20:08:52,090 INFO L226 Difference]: Without dead ends: 145 [2021-10-15 20:08:52,090 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:08:52,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-15 20:08:52,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-15 20:08:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 109 states have (on average 1.5871559633027523) internal successors, (173), 141 states have internal predecessors, (173), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:52,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 176 transitions. [2021-10-15 20:08:52,098 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 176 transitions. Word has length 16 [2021-10-15 20:08:52,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:52,099 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 176 transitions. [2021-10-15 20:08:52,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:52,099 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 176 transitions. [2021-10-15 20:08:52,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-15 20:08:52,100 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:52,101 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:52,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-15 20:08:52,101 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:08:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:52,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1300029696, now seen corresponding path program 1 times [2021-10-15 20:08:52,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:52,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125486292] [2021-10-15 20:08:52,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:52,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:52,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:52,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:52,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:52,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:52,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125486292] [2021-10-15 20:08:52,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125486292] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:52,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:52,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:08:52,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750783029] [2021-10-15 20:08:52,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:08:52,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:52,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:08:52,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:08:52,280 INFO L87 Difference]: Start difference. First operand 145 states and 176 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:52,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:52,591 INFO L93 Difference]: Finished difference Result 144 states and 174 transitions. [2021-10-15 20:08:52,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:08:52,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-15 20:08:52,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:52,593 INFO L225 Difference]: With dead ends: 144 [2021-10-15 20:08:52,593 INFO L226 Difference]: Without dead ends: 144 [2021-10-15 20:08:52,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:08:52,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-15 20:08:52,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-10-15 20:08:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 109 states have (on average 1.5688073394495412) internal successors, (171), 140 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:52,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 174 transitions. [2021-10-15 20:08:52,599 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 174 transitions. Word has length 16 [2021-10-15 20:08:52,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:52,599 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 174 transitions. [2021-10-15 20:08:52,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:52,600 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 174 transitions. [2021-10-15 20:08:52,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-15 20:08:52,601 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:52,601 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:52,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-15 20:08:52,601 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:08:52,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:52,602 INFO L82 PathProgramCache]: Analyzing trace with hash -573429058, now seen corresponding path program 1 times [2021-10-15 20:08:52,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:52,611 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562202158] [2021-10-15 20:08:52,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:52,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:52,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:52,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:52,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562202158] [2021-10-15 20:08:52,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562202158] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:52,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:52,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-15 20:08:52,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679376451] [2021-10-15 20:08:52,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-15 20:08:52,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:52,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-15 20:08:52,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:08:52,782 INFO L87 Difference]: Start difference. First operand 144 states and 174 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:53,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:53,067 INFO L93 Difference]: Finished difference Result 152 states and 183 transitions. [2021-10-15 20:08:53,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:08:53,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-15 20:08:53,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:53,069 INFO L225 Difference]: With dead ends: 152 [2021-10-15 20:08:53,069 INFO L226 Difference]: Without dead ends: 152 [2021-10-15 20:08:53,070 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:08:53,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-15 20:08:53,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 148. [2021-10-15 20:08:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 113 states have (on average 1.5575221238938053) internal successors, (176), 144 states have internal predecessors, (176), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 179 transitions. [2021-10-15 20:08:53,075 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 179 transitions. Word has length 20 [2021-10-15 20:08:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:53,076 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 179 transitions. [2021-10-15 20:08:53,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 179 transitions. [2021-10-15 20:08:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-15 20:08:53,077 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:53,077 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:53,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-15 20:08:53,078 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr43REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:08:53,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:53,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1184218310, now seen corresponding path program 1 times [2021-10-15 20:08:53,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:53,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783866365] [2021-10-15 20:08:53,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:53,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:53,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:53,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:53,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783866365] [2021-10-15 20:08:53,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783866365] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:53,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:53,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:08:53,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743852689] [2021-10-15 20:08:53,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:08:53,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:53,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:08:53,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:08:53,171 INFO L87 Difference]: Start difference. First operand 148 states and 179 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:53,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:53,526 INFO L93 Difference]: Finished difference Result 172 states and 197 transitions. [2021-10-15 20:08:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:08:53,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-15 20:08:53,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:53,529 INFO L225 Difference]: With dead ends: 172 [2021-10-15 20:08:53,529 INFO L226 Difference]: Without dead ends: 172 [2021-10-15 20:08:53,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:08:53,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-15 20:08:53,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 132. [2021-10-15 20:08:53,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 97 states have (on average 1.5051546391752577) internal successors, (146), 128 states have internal predecessors, (146), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 149 transitions. [2021-10-15 20:08:53,535 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 149 transitions. Word has length 20 [2021-10-15 20:08:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:53,536 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 149 transitions. [2021-10-15 20:08:53,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:53,536 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 149 transitions. [2021-10-15 20:08:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-15 20:08:53,537 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:53,537 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:53,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-15 20:08:53,538 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:08:53,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:53,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1843724223, now seen corresponding path program 1 times [2021-10-15 20:08:53,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:53,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415675721] [2021-10-15 20:08:53,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:53,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:53,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:53,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:53,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415675721] [2021-10-15 20:08:53,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415675721] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:53,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:53,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-15 20:08:53,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194162848] [2021-10-15 20:08:53,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-15 20:08:53,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:53,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-15 20:08:53,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:08:53,677 INFO L87 Difference]: Start difference. First operand 132 states and 149 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:54,236 INFO L93 Difference]: Finished difference Result 136 states and 151 transitions. [2021-10-15 20:08:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:08:54,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-15 20:08:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:54,238 INFO L225 Difference]: With dead ends: 136 [2021-10-15 20:08:54,238 INFO L226 Difference]: Without dead ends: 136 [2021-10-15 20:08:54,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 175.7ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-15 20:08:54,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-15 20:08:54,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2021-10-15 20:08:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 97 states have (on average 1.4948453608247423) internal successors, (145), 127 states have internal predecessors, (145), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:54,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 148 transitions. [2021-10-15 20:08:54,244 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 148 transitions. Word has length 20 [2021-10-15 20:08:54,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:54,245 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 148 transitions. [2021-10-15 20:08:54,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:54,245 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 148 transitions. [2021-10-15 20:08:54,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-15 20:08:54,246 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:54,246 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:54,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-15 20:08:54,246 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:08:54,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:54,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1843724222, now seen corresponding path program 1 times [2021-10-15 20:08:54,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:54,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875507624] [2021-10-15 20:08:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:54,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:54,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:54,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:54,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875507624] [2021-10-15 20:08:54,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875507624] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:54,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:54,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-10-15 20:08:54,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119376894] [2021-10-15 20:08:54,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-15 20:08:54,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:54,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-15 20:08:54,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:08:54,451 INFO L87 Difference]: Start difference. First operand 131 states and 148 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:55,223 INFO L93 Difference]: Finished difference Result 132 states and 147 transitions. [2021-10-15 20:08:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-15 20:08:55,225 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-10-15 20:08:55,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:55,227 INFO L225 Difference]: With dead ends: 132 [2021-10-15 20:08:55,227 INFO L226 Difference]: Without dead ends: 132 [2021-10-15 20:08:55,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 399.8ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-10-15 20:08:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-15 20:08:55,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 120. [2021-10-15 20:08:55,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 91 states have (on average 1.4725274725274726) internal successors, (134), 116 states have internal predecessors, (134), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:55,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2021-10-15 20:08:55,233 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 20 [2021-10-15 20:08:55,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:55,233 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2021-10-15 20:08:55,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:55,234 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2021-10-15 20:08:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-15 20:08:55,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:55,235 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:55,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-15 20:08:55,236 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:08:55,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:55,236 INFO L82 PathProgramCache]: Analyzing trace with hash 904303381, now seen corresponding path program 1 times [2021-10-15 20:08:55,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:55,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394451164] [2021-10-15 20:08:55,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:55,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:55,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:55,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:55,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394451164] [2021-10-15 20:08:55,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394451164] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:55,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:55,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-15 20:08:55,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258543124] [2021-10-15 20:08:55,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:08:55,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:55,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:08:55,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:08:55,345 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:55,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:55,698 INFO L93 Difference]: Finished difference Result 186 states and 208 transitions. [2021-10-15 20:08:55,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:08:55,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-15 20:08:55,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:55,700 INFO L225 Difference]: With dead ends: 186 [2021-10-15 20:08:55,700 INFO L226 Difference]: Without dead ends: 186 [2021-10-15 20:08:55,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:08:55,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-10-15 20:08:55,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 133. [2021-10-15 20:08:55,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 104 states have (on average 1.4519230769230769) internal successors, (151), 129 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:55,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2021-10-15 20:08:55,705 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 24 [2021-10-15 20:08:55,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:55,706 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2021-10-15 20:08:55,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:55,706 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2021-10-15 20:08:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-15 20:08:55,708 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:55,708 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:55,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-15 20:08:55,708 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr42REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:08:55,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:55,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1482793211, now seen corresponding path program 1 times [2021-10-15 20:08:55,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:55,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569750457] [2021-10-15 20:08:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:55,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:55,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:55,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:55,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569750457] [2021-10-15 20:08:55,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569750457] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:08:55,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180013970] [2021-10-15 20:08:55,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:55,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:08:55,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:08:55,891 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:08:55,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-15 20:08:56,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:56,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-15 20:08:56,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:08:56,165 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 [2021-10-15 20:08:56,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:08:56,206 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 25 treesize of output 13 [2021-10-15 20:08:56,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:08:56,228 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 29 treesize of output 13 [2021-10-15 20:08:56,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 20:08:56,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-10-15 20:08:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:56,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180013970] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:56,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-15 20:08:56,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-10-15 20:08:56,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501786025] [2021-10-15 20:08:56,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:08:56,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:56,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:08:56,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:08:56,506 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:56,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:56,954 INFO L93 Difference]: Finished difference Result 164 states and 186 transitions. [2021-10-15 20:08:56,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 20:08:56,955 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-10-15 20:08:56,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:56,958 INFO L225 Difference]: With dead ends: 164 [2021-10-15 20:08:56,958 INFO L226 Difference]: Without dead ends: 163 [2021-10-15 20:08:56,959 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 325.9ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-10-15 20:08:56,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-10-15 20:08:56,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 136. [2021-10-15 20:08:56,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 107 states have (on average 1.439252336448598) internal successors, (154), 132 states have internal predecessors, (154), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:56,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 157 transitions. [2021-10-15 20:08:56,969 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 157 transitions. Word has length 24 [2021-10-15 20:08:56,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:56,972 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 157 transitions. [2021-10-15 20:08:56,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:56,972 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 157 transitions. [2021-10-15 20:08:56,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-15 20:08:56,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:56,979 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:57,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-15 20:08:57,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-15 20:08:57,195 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:08:57,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:57,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1279681529, now seen corresponding path program 1 times [2021-10-15 20:08:57,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:57,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973162176] [2021-10-15 20:08:57,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:57,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:57,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:57,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:57,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:57,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973162176] [2021-10-15 20:08:57,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973162176] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:57,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:57,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 20:08:57,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508439060] [2021-10-15 20:08:57,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:08:57,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:57,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:08:57,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:08:57,363 INFO L87 Difference]: Start difference. First operand 136 states and 157 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:57,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:57,843 INFO L93 Difference]: Finished difference Result 165 states and 187 transitions. [2021-10-15 20:08:57,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:08:57,843 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-15 20:08:57,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:57,845 INFO L225 Difference]: With dead ends: 165 [2021-10-15 20:08:57,845 INFO L226 Difference]: Without dead ends: 165 [2021-10-15 20:08:57,846 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:08:57,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-15 20:08:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 137. [2021-10-15 20:08:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 109 states have (on average 1.4311926605504588) internal successors, (156), 133 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 159 transitions. [2021-10-15 20:08:57,851 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 159 transitions. Word has length 25 [2021-10-15 20:08:57,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:57,851 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 159 transitions. [2021-10-15 20:08:57,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:57,852 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 159 transitions. [2021-10-15 20:08:57,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-15 20:08:57,853 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:57,853 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:57,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-15 20:08:57,853 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:08:57,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:57,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1279681528, now seen corresponding path program 1 times [2021-10-15 20:08:57,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:57,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106717268] [2021-10-15 20:08:57,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:57,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:58,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:58,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:58,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106717268] [2021-10-15 20:08:58,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106717268] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:58,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:58,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 20:08:58,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597370515] [2021-10-15 20:08:58,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:08:58,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:58,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:08:58,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:08:58,137 INFO L87 Difference]: Start difference. First operand 137 states and 159 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:58,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:08:58,911 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2021-10-15 20:08:58,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:08:58,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-15 20:08:58,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:08:58,913 INFO L225 Difference]: With dead ends: 189 [2021-10-15 20:08:58,913 INFO L226 Difference]: Without dead ends: 189 [2021-10-15 20:08:58,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:08:58,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-10-15 20:08:58,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 139. [2021-10-15 20:08:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 111 states have (on average 1.4234234234234233) internal successors, (158), 135 states have internal predecessors, (158), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:58,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 161 transitions. [2021-10-15 20:08:58,921 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 161 transitions. Word has length 25 [2021-10-15 20:08:58,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:08:58,921 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 161 transitions. [2021-10-15 20:08:58,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:08:58,922 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 161 transitions. [2021-10-15 20:08:58,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-15 20:08:58,922 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:08:58,923 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:08:58,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-10-15 20:08:58,923 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:08:58,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:08:58,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1413298484, now seen corresponding path program 1 times [2021-10-15 20:08:58,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:08:58,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009267504] [2021-10-15 20:08:58,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:08:58,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:08:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:59,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:08:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:08:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:08:59,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:08:59,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009267504] [2021-10-15 20:08:59,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009267504] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:08:59,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:08:59,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-10-15 20:08:59,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272020507] [2021-10-15 20:08:59,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 20:08:59,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:08:59,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 20:08:59,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-15 20:08:59,234 INFO L87 Difference]: Start difference. First operand 139 states and 161 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:00,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:00,172 INFO L93 Difference]: Finished difference Result 206 states and 230 transitions. [2021-10-15 20:09:00,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-15 20:09:00,172 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-15 20:09:00,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:00,174 INFO L225 Difference]: With dead ends: 206 [2021-10-15 20:09:00,174 INFO L226 Difference]: Without dead ends: 206 [2021-10-15 20:09:00,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 350.5ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-10-15 20:09:00,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-10-15 20:09:00,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 151. [2021-10-15 20:09:00,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 123 states have (on average 1.3902439024390243) internal successors, (171), 147 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 174 transitions. [2021-10-15 20:09:00,182 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 174 transitions. Word has length 27 [2021-10-15 20:09:00,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:00,186 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 174 transitions. [2021-10-15 20:09:00,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:00,186 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 174 transitions. [2021-10-15 20:09:00,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-15 20:09:00,187 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:00,187 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:00,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-10-15 20:09:00,192 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr58ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:00,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:00,193 INFO L82 PathProgramCache]: Analyzing trace with hash -863408738, now seen corresponding path program 1 times [2021-10-15 20:09:00,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:00,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794766639] [2021-10-15 20:09:00,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:00,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:00,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:09:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:00,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:00,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794766639] [2021-10-15 20:09:00,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794766639] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:09:00,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:09:00,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-15 20:09:00,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979283171] [2021-10-15 20:09:00,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:09:00,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:00,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:09:00,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:09:00,297 INFO L87 Difference]: Start difference. First operand 151 states and 174 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:00,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:00,548 INFO L93 Difference]: Finished difference Result 176 states and 196 transitions. [2021-10-15 20:09:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:09:00,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-10-15 20:09:00,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:00,551 INFO L225 Difference]: With dead ends: 176 [2021-10-15 20:09:00,551 INFO L226 Difference]: Without dead ends: 176 [2021-10-15 20:09:00,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:09:00,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-10-15 20:09:00,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 151. [2021-10-15 20:09:00,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 123 states have (on average 1.3821138211382114) internal successors, (170), 147 states have internal predecessors, (170), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2021-10-15 20:09:00,571 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 28 [2021-10-15 20:09:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:00,572 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2021-10-15 20:09:00,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2021-10-15 20:09:00,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-15 20:09:00,573 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:00,573 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:00,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-10-15 20:09:00,574 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr42REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:00,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:00,576 INFO L82 PathProgramCache]: Analyzing trace with hash 481410755, now seen corresponding path program 1 times [2021-10-15 20:09:00,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:00,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144627809] [2021-10-15 20:09:00,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:00,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:00,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:09:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:00,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:00,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144627809] [2021-10-15 20:09:00,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144627809] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:09:00,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:09:00,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-10-15 20:09:00,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360163533] [2021-10-15 20:09:00,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-15 20:09:00,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:00,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-15 20:09:00,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:09:00,784 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:01,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:01,248 INFO L93 Difference]: Finished difference Result 211 states and 233 transitions. [2021-10-15 20:09:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:09:01,249 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-10-15 20:09:01,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:01,251 INFO L225 Difference]: With dead ends: 211 [2021-10-15 20:09:01,251 INFO L226 Difference]: Without dead ends: 211 [2021-10-15 20:09:01,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-10-15 20:09:01,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-10-15 20:09:01,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 155. [2021-10-15 20:09:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 127 states have (on average 1.3700787401574803) internal successors, (174), 151 states have internal predecessors, (174), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:01,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 177 transitions. [2021-10-15 20:09:01,257 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 177 transitions. Word has length 29 [2021-10-15 20:09:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:01,258 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 177 transitions. [2021-10-15 20:09:01,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:01,258 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 177 transitions. [2021-10-15 20:09:01,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-15 20:09:01,259 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:01,259 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:01,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-15 20:09:01,260 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:01,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:01,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2037200703, now seen corresponding path program 1 times [2021-10-15 20:09:01,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:01,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067521439] [2021-10-15 20:09:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:01,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:01,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:09:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:01,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:01,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067521439] [2021-10-15 20:09:01,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067521439] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:09:01,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:09:01,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-10-15 20:09:01,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939548557] [2021-10-15 20:09:01,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 20:09:01,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:01,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 20:09:01,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-15 20:09:01,513 INFO L87 Difference]: Start difference. First operand 155 states and 177 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:02,158 INFO L93 Difference]: Finished difference Result 192 states and 212 transitions. [2021-10-15 20:09:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 20:09:02,159 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-10-15 20:09:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:02,161 INFO L225 Difference]: With dead ends: 192 [2021-10-15 20:09:02,161 INFO L226 Difference]: Without dead ends: 192 [2021-10-15 20:09:02,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-10-15 20:09:02,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-15 20:09:02,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 161. [2021-10-15 20:09:02,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 133 states have (on average 1.3533834586466165) internal successors, (180), 157 states have internal predecessors, (180), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:02,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2021-10-15 20:09:02,167 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 30 [2021-10-15 20:09:02,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:02,168 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2021-10-15 20:09:02,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:02,168 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2021-10-15 20:09:02,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-15 20:09:02,169 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:02,169 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:02,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-15 20:09:02,169 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:02,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:02,170 INFO L82 PathProgramCache]: Analyzing trace with hash -805654302, now seen corresponding path program 1 times [2021-10-15 20:09:02,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:02,170 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477162985] [2021-10-15 20:09:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:02,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:02,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:09:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:02,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:02,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477162985] [2021-10-15 20:09:02,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477162985] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:09:02,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:09:02,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-10-15 20:09:02,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091626249] [2021-10-15 20:09:02,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:09:02,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:02,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:09:02,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:09:02,284 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:02,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:02,707 INFO L93 Difference]: Finished difference Result 210 states and 228 transitions. [2021-10-15 20:09:02,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-15 20:09:02,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-10-15 20:09:02,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:02,709 INFO L225 Difference]: With dead ends: 210 [2021-10-15 20:09:02,709 INFO L226 Difference]: Without dead ends: 210 [2021-10-15 20:09:02,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-10-15 20:09:02,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-10-15 20:09:02,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 161. [2021-10-15 20:09:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 133 states have (on average 1.3383458646616542) internal successors, (178), 157 states have internal predecessors, (178), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 181 transitions. [2021-10-15 20:09:02,713 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 181 transitions. Word has length 30 [2021-10-15 20:09:02,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:02,714 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 181 transitions. [2021-10-15 20:09:02,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:02,714 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 181 transitions. [2021-10-15 20:09:02,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-15 20:09:02,715 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:02,715 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-15 20:09:02,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-15 20:09:02,715 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:02,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:02,716 INFO L82 PathProgramCache]: Analyzing trace with hash 7443348, now seen corresponding path program 1 times [2021-10-15 20:09:02,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:02,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085155940] [2021-10-15 20:09:02,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:02,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:02,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:09:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:02,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:02,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:02,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085155940] [2021-10-15 20:09:02,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085155940] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:02,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633026592] [2021-10-15 20:09:02,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:02,996 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:02,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:02,997 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:03,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-15 20:09:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:03,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-15 20:09:03,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:03,203 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 [2021-10-15 20:09:03,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:09:03,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:09:03,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:03,321 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 21 treesize of output 20 [2021-10-15 20:09:03,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:03,360 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 21 treesize of output 20 [2021-10-15 20:09:03,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:03,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:03,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:03,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-15 20:09:03,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:03,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:03,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:03,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-15 20:09:03,624 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 20:09:03,625 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 [2021-10-15 20:09:03,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:03,720 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 36 treesize of output 23 [2021-10-15 20:09:03,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:03,746 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 36 treesize of output 23 [2021-10-15 20:09:03,804 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-10-15 20:09:03,805 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 55 treesize of output 57 [2021-10-15 20:09:03,819 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-10-15 20:09:03,820 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 64 treesize of output 66 [2021-10-15 20:09:03,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 20:09:03,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:03,910 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-10-15 20:09:03,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 91 [2021-10-15 20:09:03,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 20:09:03,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:03,927 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 20:09:03,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 82 treesize of output 74 [2021-10-15 20:09:04,871 INFO L354 Elim1Store]: treesize reduction 65, result has 11.0 percent of original size [2021-10-15 20:09:04,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 104 treesize of output 66 [2021-10-15 20:09:04,891 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-10-15 20:09:04,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 33 [2021-10-15 20:09:04,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:04,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633026592] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:04,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:09:04,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2021-10-15 20:09:04,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489139740] [2021-10-15 20:09:04,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-15 20:09:04,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:04,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-15 20:09:04,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-10-15 20:09:04,918 INFO L87 Difference]: Start difference. First operand 161 states and 181 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 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) [2021-10-15 20:09:06,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:06,368 INFO L93 Difference]: Finished difference Result 192 states and 213 transitions. [2021-10-15 20:09:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 20:09:06,368 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 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 30 [2021-10-15 20:09:06,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:06,371 INFO L225 Difference]: With dead ends: 192 [2021-10-15 20:09:06,377 INFO L226 Difference]: Without dead ends: 192 [2021-10-15 20:09:06,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1029.7ms TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2021-10-15 20:09:06,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-15 20:09:06,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 163. [2021-10-15 20:09:06,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 135 states have (on average 1.3333333333333333) internal successors, (180), 159 states have internal predecessors, (180), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:06,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 183 transitions. [2021-10-15 20:09:06,385 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 183 transitions. Word has length 30 [2021-10-15 20:09:06,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:06,386 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 183 transitions. [2021-10-15 20:09:06,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 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) [2021-10-15 20:09:06,386 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 183 transitions. [2021-10-15 20:09:06,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-15 20:09:06,388 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:06,388 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-15 20:09:06,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-15 20:09:06,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:06,592 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:06,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1361308933, now seen corresponding path program 1 times [2021-10-15 20:09:06,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:06,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812635432] [2021-10-15 20:09:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:06,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:06,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:09:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:06,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:06,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812635432] [2021-10-15 20:09:06,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812635432] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:06,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766945444] [2021-10-15 20:09:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:06,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:06,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:06,911 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:06,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-15 20:09:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:07,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-15 20:09:07,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:07,230 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 [2021-10-15 20:09:07,344 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 20:09:07,345 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 [2021-10-15 20:09:07,408 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 21 treesize of output 17 [2021-10-15 20:09:07,568 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-15 20:09:07,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-10-15 20:09:07,860 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-10-15 20:09:07,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 41 [2021-10-15 20:09:07,952 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 20:09:07,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-15 20:09:08,259 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 20:09:08,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-10-15 20:09:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:08,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766945444] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:08,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:09:08,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-10-15 20:09:08,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970143389] [2021-10-15 20:09:08,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-15 20:09:08,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:08,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-15 20:09:08,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-10-15 20:09:08,347 INFO L87 Difference]: Start difference. First operand 163 states and 183 transitions. Second operand has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 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) [2021-10-15 20:09:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:10,221 INFO L93 Difference]: Finished difference Result 249 states and 276 transitions. [2021-10-15 20:09:10,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-15 20:09:10,222 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 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 31 [2021-10-15 20:09:10,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:10,224 INFO L225 Difference]: With dead ends: 249 [2021-10-15 20:09:10,224 INFO L226 Difference]: Without dead ends: 249 [2021-10-15 20:09:10,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1145.1ms TimeCoverageRelationStatistics Valid=488, Invalid=1962, Unknown=0, NotChecked=0, Total=2450 [2021-10-15 20:09:10,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-10-15 20:09:10,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 182. [2021-10-15 20:09:10,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 154 states have (on average 1.3246753246753247) internal successors, (204), 178 states have internal predecessors, (204), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 207 transitions. [2021-10-15 20:09:10,233 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 207 transitions. Word has length 31 [2021-10-15 20:09:10,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:10,234 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 207 transitions. [2021-10-15 20:09:10,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 states have internal predecessors, (55), 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) [2021-10-15 20:09:10,234 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 207 transitions. [2021-10-15 20:09:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-15 20:09:10,235 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:10,235 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-15 20:09:10,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:09:10,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-15 20:09:10,451 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:10,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:10,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1361308932, now seen corresponding path program 1 times [2021-10-15 20:09:10,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:10,451 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96205865] [2021-10-15 20:09:10,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:10,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:10,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:09:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:10,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:10,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96205865] [2021-10-15 20:09:10,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96205865] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:10,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275883334] [2021-10-15 20:09:10,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:10,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:10,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:10,786 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:10,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-15 20:09:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:11,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-15 20:09:11,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:11,100 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 [2021-10-15 20:09:11,233 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 [2021-10-15 20:09:11,245 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 20:09:11,246 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 [2021-10-15 20:09:11,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:09:11,317 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 21 treesize of output 17 [2021-10-15 20:09:11,500 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-15 20:09:11,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-10-15 20:09:11,516 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-15 20:09:11,517 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 59 treesize of output 54 [2021-10-15 20:09:11,963 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-10-15 20:09:11,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 83 [2021-10-15 20:09:11,988 INFO L354 Elim1Store]: treesize reduction 98, result has 21.6 percent of original size [2021-10-15 20:09:11,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 79 [2021-10-15 20:09:12,112 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 20:09:12,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 51 [2021-10-15 20:09:12,128 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-15 20:09:12,129 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 61 treesize of output 56 [2021-10-15 20:09:12,659 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 20:09:12,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 46 [2021-10-15 20:09:12,669 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 20:09:12,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 25 [2021-10-15 20:09:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:12,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275883334] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:12,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:09:12,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-10-15 20:09:12,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508941121] [2021-10-15 20:09:12,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-15 20:09:12,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:12,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-15 20:09:12,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-10-15 20:09:12,694 INFO L87 Difference]: Start difference. First operand 182 states and 207 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 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) [2021-10-15 20:09:14,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:14,560 INFO L93 Difference]: Finished difference Result 272 states and 302 transitions. [2021-10-15 20:09:14,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-15 20:09:14,561 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 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 31 [2021-10-15 20:09:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:14,563 INFO L225 Difference]: With dead ends: 272 [2021-10-15 20:09:14,563 INFO L226 Difference]: Without dead ends: 272 [2021-10-15 20:09:14,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1257.0ms TimeCoverageRelationStatistics Valid=326, Invalid=1744, Unknown=0, NotChecked=0, Total=2070 [2021-10-15 20:09:14,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-10-15 20:09:14,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 197. [2021-10-15 20:09:14,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 169 states have (on average 1.3076923076923077) internal successors, (221), 193 states have internal predecessors, (221), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 224 transitions. [2021-10-15 20:09:14,572 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 224 transitions. Word has length 31 [2021-10-15 20:09:14,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:14,572 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 224 transitions. [2021-10-15 20:09:14,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 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) [2021-10-15 20:09:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 224 transitions. [2021-10-15 20:09:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-15 20:09:14,573 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:14,574 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:14,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:09:14,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:14,790 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr56ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:14,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:14,791 INFO L82 PathProgramCache]: Analyzing trace with hash -2132846422, now seen corresponding path program 1 times [2021-10-15 20:09:14,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:14,791 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212074584] [2021-10-15 20:09:14,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:14,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:14,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:09:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:14,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:14,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212074584] [2021-10-15 20:09:14,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212074584] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-15 20:09:14,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:09:14,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-15 20:09:14,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692664178] [2021-10-15 20:09:14,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:09:14,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:14,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:09:14,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:09:14,873 INFO L87 Difference]: Start difference. First operand 197 states and 224 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:15,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:15,134 INFO L93 Difference]: Finished difference Result 211 states and 238 transitions. [2021-10-15 20:09:15,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:09:15,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-10-15 20:09:15,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:15,137 INFO L225 Difference]: With dead ends: 211 [2021-10-15 20:09:15,137 INFO L226 Difference]: Without dead ends: 211 [2021-10-15 20:09:15,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-15 20:09:15,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-10-15 20:09:15,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 198. [2021-10-15 20:09:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 170 states have (on average 1.3058823529411765) internal successors, (222), 194 states have internal predecessors, (222), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:15,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 225 transitions. [2021-10-15 20:09:15,145 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 225 transitions. Word has length 35 [2021-10-15 20:09:15,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:15,146 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 225 transitions. [2021-10-15 20:09:15,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:15,146 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 225 transitions. [2021-10-15 20:09:15,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-15 20:09:15,147 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:15,147 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-15 20:09:15,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-10-15 20:09:15,148 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:15,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:15,149 INFO L82 PathProgramCache]: Analyzing trace with hash -333889866, now seen corresponding path program 1 times [2021-10-15 20:09:15,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:15,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310557569] [2021-10-15 20:09:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:15,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:15,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:09:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:15,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:15,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:15,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310557569] [2021-10-15 20:09:15,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310557569] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:15,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032266597] [2021-10-15 20:09:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:15,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:15,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:15,434 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:15,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-15 20:09:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:15,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-15 20:09:15,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:15,803 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 [2021-10-15 20:09:15,958 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 20:09:15,958 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 [2021-10-15 20:09:16,026 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 21 treesize of output 17 [2021-10-15 20:09:16,198 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-15 20:09:16,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-10-15 20:09:16,491 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-10-15 20:09:16,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 41 [2021-10-15 20:09:16,578 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 20:09:16,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-10-15 20:09:16,882 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 20:09:16,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-10-15 20:09:16,982 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-10-15 20:09:16,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-10-15 20:09:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:17,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032266597] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:17,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:09:17,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-10-15 20:09:17,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197341884] [2021-10-15 20:09:17,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-15 20:09:17,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:17,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-15 20:09:17,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-10-15 20:09:17,288 INFO L87 Difference]: Start difference. First operand 198 states and 225 transitions. Second operand has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 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) [2021-10-15 20:09:23,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:23,811 INFO L93 Difference]: Finished difference Result 364 states and 405 transitions. [2021-10-15 20:09:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-15 20:09:23,811 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 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 36 [2021-10-15 20:09:23,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:23,814 INFO L225 Difference]: With dead ends: 364 [2021-10-15 20:09:23,814 INFO L226 Difference]: Without dead ends: 364 [2021-10-15 20:09:23,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 2332.0ms TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2021-10-15 20:09:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-10-15 20:09:23,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 205. [2021-10-15 20:09:23,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 178 states have (on average 1.297752808988764) internal successors, (231), 201 states have internal predecessors, (231), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 234 transitions. [2021-10-15 20:09:23,824 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 234 transitions. Word has length 36 [2021-10-15 20:09:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:23,825 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 234 transitions. [2021-10-15 20:09:23,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 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) [2021-10-15 20:09:23,826 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 234 transitions. [2021-10-15 20:09:23,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-15 20:09:23,826 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:23,827 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-15 20:09:23,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:09:24,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-15 20:09:24,043 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr37REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:24,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:24,043 INFO L82 PathProgramCache]: Analyzing trace with hash -333889865, now seen corresponding path program 1 times [2021-10-15 20:09:24,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:24,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317769302] [2021-10-15 20:09:24,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:24,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:24,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:09:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:24,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:24,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317769302] [2021-10-15 20:09:24,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317769302] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:24,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110280938] [2021-10-15 20:09:24,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:24,388 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:24,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:24,394 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:24,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-15 20:09:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:24,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-15 20:09:24,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:24,789 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 [2021-10-15 20:09:24,929 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-10-15 20:09:24,929 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 [2021-10-15 20:09:24,941 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 [2021-10-15 20:09:25,018 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 26 treesize of output 22 [2021-10-15 20:09:25,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:09:25,264 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-15 20:09:25,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 54 [2021-10-15 20:09:25,282 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-15 20:09:25,282 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 68 treesize of output 63 [2021-10-15 20:09:25,726 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-10-15 20:09:25,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 81 [2021-10-15 20:09:25,759 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-10-15 20:09:25,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 72 treesize of output 65 [2021-10-15 20:09:25,868 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-10-15 20:09:25,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 50 [2021-10-15 20:09:25,887 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-15 20:09:25,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 59 [2021-10-15 20:09:26,371 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 20:09:26,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 50 [2021-10-15 20:09:26,378 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 20:09:26,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 29 [2021-10-15 20:09:26,478 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 20:09:26,479 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 31 treesize of output 33 [2021-10-15 20:09:26,498 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-10-15 20:09:26,499 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 30 treesize of output 32 [2021-10-15 20:09:26,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:26,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110280938] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:26,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:09:26,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-10-15 20:09:26,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413022656] [2021-10-15 20:09:26,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-15 20:09:26,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:26,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-15 20:09:26,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-10-15 20:09:26,665 INFO L87 Difference]: Start difference. First operand 205 states and 234 transitions. Second operand has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 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) [2021-10-15 20:09:28,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:28,967 INFO L93 Difference]: Finished difference Result 341 states and 379 transitions. [2021-10-15 20:09:28,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-15 20:09:28,968 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 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 36 [2021-10-15 20:09:28,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:28,971 INFO L225 Difference]: With dead ends: 341 [2021-10-15 20:09:28,971 INFO L226 Difference]: Without dead ends: 341 [2021-10-15 20:09:28,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1488.9ms TimeCoverageRelationStatistics Valid=302, Invalid=1590, Unknown=0, NotChecked=0, Total=1892 [2021-10-15 20:09:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-10-15 20:09:28,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 208. [2021-10-15 20:09:28,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 181 states have (on average 1.287292817679558) internal successors, (233), 204 states have internal predecessors, (233), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:28,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 236 transitions. [2021-10-15 20:09:28,984 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 236 transitions. Word has length 36 [2021-10-15 20:09:28,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:28,985 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 236 transitions. [2021-10-15 20:09:28,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 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) [2021-10-15 20:09:28,985 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 236 transitions. [2021-10-15 20:09:28,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-15 20:09:28,986 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:28,987 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:29,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:09:29,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-15 20:09:29,202 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:29,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:29,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1592225079, now seen corresponding path program 2 times [2021-10-15 20:09:29,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:29,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283220018] [2021-10-15 20:09:29,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:29,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:29,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:09:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:29,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:29,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283220018] [2021-10-15 20:09:29,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283220018] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:29,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275849838] [2021-10-15 20:09:29,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-15 20:09:29,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:29,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:29,819 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:29,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-15 20:09:30,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-15 20:09:30,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-15 20:09:30,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-15 20:09:30,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:30,290 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 [2021-10-15 20:09:30,410 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 20:09:30,410 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 [2021-10-15 20:09:30,462 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 16 treesize of output 12 [2021-10-15 20:09:30,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:09:30,633 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-15 20:09:30,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 44 [2021-10-15 20:09:30,647 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-15 20:09:30,647 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 50 treesize of output 45 [2021-10-15 20:09:30,989 INFO L354 Elim1Store]: treesize reduction 82, result has 21.9 percent of original size [2021-10-15 20:09:30,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 78 [2021-10-15 20:09:31,017 INFO L354 Elim1Store]: treesize reduction 74, result has 23.7 percent of original size [2021-10-15 20:09:31,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 58 [2021-10-15 20:09:31,111 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-15 20:09:31,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 48 [2021-10-15 20:09:31,123 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-10-15 20:09:31,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 44 [2021-10-15 20:09:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:31,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275849838] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:31,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:09:31,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-10-15 20:09:31,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607130571] [2021-10-15 20:09:31,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-15 20:09:31,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:31,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-15 20:09:31,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-10-15 20:09:31,721 INFO L87 Difference]: Start difference. First operand 208 states and 236 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 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) [2021-10-15 20:09:33,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:33,854 INFO L93 Difference]: Finished difference Result 242 states and 266 transitions. [2021-10-15 20:09:33,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-15 20:09:33,854 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 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 36 [2021-10-15 20:09:33,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:33,856 INFO L225 Difference]: With dead ends: 242 [2021-10-15 20:09:33,856 INFO L226 Difference]: Without dead ends: 242 [2021-10-15 20:09:33,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 1558.2ms TimeCoverageRelationStatistics Valid=344, Invalid=2008, Unknown=0, NotChecked=0, Total=2352 [2021-10-15 20:09:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-10-15 20:09:33,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 200. [2021-10-15 20:09:33,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 173 states have (on average 1.283236994219653) internal successors, (222), 196 states have internal predecessors, (222), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:33,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 225 transitions. [2021-10-15 20:09:33,875 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 225 transitions. Word has length 36 [2021-10-15 20:09:33,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:33,876 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 225 transitions. [2021-10-15 20:09:33,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 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) [2021-10-15 20:09:33,877 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 225 transitions. [2021-10-15 20:09:33,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-15 20:09:33,878 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:33,878 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-15 20:09:33,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-15 20:09:34,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-15 20:09:34,095 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:34,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:34,095 INFO L82 PathProgramCache]: Analyzing trace with hash 118656232, now seen corresponding path program 1 times [2021-10-15 20:09:34,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:34,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930325247] [2021-10-15 20:09:34,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:34,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:34,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:09:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:34,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:34,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930325247] [2021-10-15 20:09:34,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930325247] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:34,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888689436] [2021-10-15 20:09:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:34,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:34,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:34,267 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:34,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-15 20:09:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:34,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-15 20:09:34,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:35,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:09:35,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:09:35,300 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-15 20:09:35,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 30 [2021-10-15 20:09:35,308 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-10-15 20:09:35,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-10-15 20:09:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:35,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888689436] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:35,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:09:35,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-10-15 20:09:35,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600780096] [2021-10-15 20:09:35,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:09:35,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:35,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:09:35,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:09:35,348 INFO L87 Difference]: Start difference. First operand 200 states and 225 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 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) [2021-10-15 20:09:36,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:36,400 INFO L93 Difference]: Finished difference Result 266 states and 288 transitions. [2021-10-15 20:09:36,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-15 20:09:36,400 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 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 38 [2021-10-15 20:09:36,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:36,402 INFO L225 Difference]: With dead ends: 266 [2021-10-15 20:09:36,402 INFO L226 Difference]: Without dead ends: 266 [2021-10-15 20:09:36,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 502.1ms TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2021-10-15 20:09:36,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-10-15 20:09:36,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 208. [2021-10-15 20:09:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 181 states have (on average 1.276243093922652) internal successors, (231), 204 states have internal predecessors, (231), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 234 transitions. [2021-10-15 20:09:36,410 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 234 transitions. Word has length 38 [2021-10-15 20:09:36,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:36,411 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 234 transitions. [2021-10-15 20:09:36,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 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) [2021-10-15 20:09:36,411 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 234 transitions. [2021-10-15 20:09:36,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-15 20:09:36,412 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:36,412 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-15 20:09:36,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-15 20:09:36,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-15 20:09:36,627 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:36,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:36,627 INFO L82 PathProgramCache]: Analyzing trace with hash 481543229, now seen corresponding path program 1 times [2021-10-15 20:09:36,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:36,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241058565] [2021-10-15 20:09:36,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:36,628 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:36,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:09:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:36,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:36,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241058565] [2021-10-15 20:09:36,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241058565] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:36,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304778634] [2021-10-15 20:09:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:36,900 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:36,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:36,901 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:36,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-15 20:09:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:37,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-15 20:09:37,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:37,475 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 [2021-10-15 20:09:37,511 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 20:09:37,512 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 [2021-10-15 20:09:37,561 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 16 treesize of output 12 [2021-10-15 20:09:37,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:37,605 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 22 treesize of output 21 [2021-10-15 20:09:38,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 20:09:38,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 38 [2021-10-15 20:09:38,513 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 20:09:38,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-10-15 20:09:38,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:38,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304778634] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:38,591 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:09:38,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-10-15 20:09:38,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041354500] [2021-10-15 20:09:38,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-15 20:09:38,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:38,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-15 20:09:38,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-10-15 20:09:38,594 INFO L87 Difference]: Start difference. First operand 208 states and 234 transitions. Second operand has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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) [2021-10-15 20:09:40,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:40,459 INFO L93 Difference]: Finished difference Result 240 states and 266 transitions. [2021-10-15 20:09:40,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-15 20:09:40,460 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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 38 [2021-10-15 20:09:40,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:40,461 INFO L225 Difference]: With dead ends: 240 [2021-10-15 20:09:40,461 INFO L226 Difference]: Without dead ends: 240 [2021-10-15 20:09:40,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1294.8ms TimeCoverageRelationStatistics Valid=284, Invalid=1786, Unknown=0, NotChecked=0, Total=2070 [2021-10-15 20:09:40,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-10-15 20:09:40,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 222. [2021-10-15 20:09:40,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 195 states have (on average 1.2923076923076924) internal successors, (252), 218 states have internal predecessors, (252), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:40,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 255 transitions. [2021-10-15 20:09:40,469 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 255 transitions. Word has length 38 [2021-10-15 20:09:40,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:40,469 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 255 transitions. [2021-10-15 20:09:40,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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) [2021-10-15 20:09:40,470 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 255 transitions. [2021-10-15 20:09:40,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-15 20:09:40,470 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:40,470 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-15 20:09:40,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-15 20:09:40,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-15 20:09:40,671 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr54REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:40,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:40,671 INFO L82 PathProgramCache]: Analyzing trace with hash 481543230, now seen corresponding path program 1 times [2021-10-15 20:09:40,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:40,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87117216] [2021-10-15 20:09:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:40,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:40,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:09:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:40,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:40,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87117216] [2021-10-15 20:09:40,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87117216] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:40,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474088040] [2021-10-15 20:09:40,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:40,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:40,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:40,922 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:40,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-15 20:09:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:41,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-15 20:09:41,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:41,507 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 [2021-10-15 20:09:41,511 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 [2021-10-15 20:09:41,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 20:09:41,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 57 [2021-10-15 20:09:41,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 20:09:41,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 55 [2021-10-15 20:09:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:42,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474088040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:42,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:09:42,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2021-10-15 20:09:42,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560527264] [2021-10-15 20:09:42,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-15 20:09:42,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:42,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-15 20:09:42,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2021-10-15 20:09:42,683 INFO L87 Difference]: Start difference. First operand 222 states and 255 transitions. Second operand has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 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) [2021-10-15 20:09:44,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:44,932 INFO L93 Difference]: Finished difference Result 267 states and 290 transitions. [2021-10-15 20:09:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-15 20:09:44,934 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 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 38 [2021-10-15 20:09:44,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:44,936 INFO L225 Difference]: With dead ends: 267 [2021-10-15 20:09:44,937 INFO L226 Difference]: Without dead ends: 267 [2021-10-15 20:09:44,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1562.8ms TimeCoverageRelationStatistics Valid=433, Invalid=2219, Unknown=0, NotChecked=0, Total=2652 [2021-10-15 20:09:44,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-10-15 20:09:44,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 224. [2021-10-15 20:09:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 197 states have (on average 1.284263959390863) internal successors, (253), 220 states have internal predecessors, (253), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 256 transitions. [2021-10-15 20:09:44,947 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 256 transitions. Word has length 38 [2021-10-15 20:09:44,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:44,948 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 256 transitions. [2021-10-15 20:09:44,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 26 states have internal predecessors, (69), 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) [2021-10-15 20:09:44,949 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 256 transitions. [2021-10-15 20:09:44,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-15 20:09:44,949 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:44,950 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-15 20:09:44,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-15 20:09:45,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-15 20:09:45,163 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:45,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:45,163 INFO L82 PathProgramCache]: Analyzing trace with hash 535531503, now seen corresponding path program 1 times [2021-10-15 20:09:45,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:45,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419171115] [2021-10-15 20:09:45,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:45,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:45,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-15 20:09:45,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:45,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:45,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-15 20:09:45,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419171115] [2021-10-15 20:09:45,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419171115] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:45,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958664227] [2021-10-15 20:09:45,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:45,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:45,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:45,762 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:09:45,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-15 20:09:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:46,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-15 20:09:46,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:46,336 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 [2021-10-15 20:09:46,370 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 [2021-10-15 20:09:46,460 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 20:09:46,461 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 [2021-10-15 20:09:46,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:46,522 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 25 treesize of output 13 [2021-10-15 20:09:46,530 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 16 treesize of output 12 [2021-10-15 20:09:46,721 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-15 20:09:46,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 52 [2021-10-15 20:09:46,734 INFO L354 Elim1Store]: treesize reduction 53, result has 14.5 percent of original size [2021-10-15 20:09:46,734 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 62 treesize of output 34 [2021-10-15 20:09:46,871 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-15 20:09:46,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 17 [2021-10-15 20:09:46,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:46,924 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 [2021-10-15 20:09:47,004 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-10-15 20:09:47,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 29 [2021-10-15 20:09:47,161 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 20:09:47,161 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 [2021-10-15 20:09:47,268 INFO L354 Elim1Store]: treesize reduction 43, result has 28.3 percent of original size [2021-10-15 20:09:47,269 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 36 treesize of output 46 [2021-10-15 20:09:47,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:09:47,351 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 43 treesize of output 39 [2021-10-15 20:09:47,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:47,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 20:09:47,357 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 20:09:47,358 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 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-15 20:09:47,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:47,421 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 21 treesize of output 20 [2021-10-15 20:09:47,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:47,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:47,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 20:09:47,440 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 20:09:47,440 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 1 case distinctions, treesize of input 53 treesize of output 40 [2021-10-15 20:09:47,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:09:47,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-10-15 20:09:47,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 20:09:47,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42 [2021-10-15 20:09:47,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 20:09:47,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 24 [2021-10-15 20:09:47,800 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 20:09:47,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-10-15 20:09:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:47,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958664227] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-15 20:09:47,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-15 20:09:47,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 34 [2021-10-15 20:09:47,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53246634] [2021-10-15 20:09:47,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-15 20:09:47,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-15 20:09:47,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-15 20:09:47,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2021-10-15 20:09:47,830 INFO L87 Difference]: Start difference. First operand 224 states and 256 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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) [2021-10-15 20:09:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:49,894 INFO L93 Difference]: Finished difference Result 289 states and 318 transitions. [2021-10-15 20:09:49,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-15 20:09:49,895 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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 38 [2021-10-15 20:09:49,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:49,896 INFO L225 Difference]: With dead ends: 289 [2021-10-15 20:09:49,897 INFO L226 Difference]: Without dead ends: 289 [2021-10-15 20:09:49,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 1628.0ms TimeCoverageRelationStatistics Valid=405, Invalid=3017, Unknown=0, NotChecked=0, Total=3422 [2021-10-15 20:09:49,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-10-15 20:09:49,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 236. [2021-10-15 20:09:49,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 209 states have (on average 1.2679425837320575) internal successors, (265), 232 states have internal predecessors, (265), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 268 transitions. [2021-10-15 20:09:49,906 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 268 transitions. Word has length 38 [2021-10-15 20:09:49,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:49,907 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 268 transitions. [2021-10-15 20:09:49,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 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) [2021-10-15 20:09:49,907 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 268 transitions. [2021-10-15 20:09:49,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-15 20:09:49,908 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:49,909 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:49,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-15 20:09:50,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:09:50,130 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr58ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:50,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:50,131 INFO L82 PathProgramCache]: Analyzing trace with hash -616625439, now seen corresponding path program 1 times [2021-10-15 20:09:50,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-15 20:09:50,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101222524] [2021-10-15 20:09:50,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:50,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-15 20:09:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:09:50,155 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-15 20:09:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-15 20:09:50,211 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-15 20:09:50,212 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-15 20:09:50,213 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr58ENSURES_VIOLATIONMEMORY_LEAK [2021-10-15 20:09:50,215 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-15 20:09:50,216 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-15 20:09:50,216 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-15 20:09:50,216 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-15 20:09:50,216 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-15 20:09:50,216 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-15 20:09:50,217 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-15 20:09:50,217 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-15 20:09:50,217 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-15 20:09:50,217 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-15 20:09:50,217 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-15 20:09:50,218 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-15 20:09:50,218 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-15 20:09:50,218 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-15 20:09:50,218 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-15 20:09:50,218 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-15 20:09:50,219 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-15 20:09:50,219 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-15 20:09:50,219 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-15 20:09:50,219 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-15 20:09:50,220 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-15 20:09:50,220 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-15 20:09:50,220 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-15 20:09:50,220 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-15 20:09:50,220 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-15 20:09:50,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-15 20:09:50,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-10-15 20:09:50,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-15 20:09:50,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-15 20:09:50,221 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-15 20:09:50,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-10-15 20:09:50,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION [2021-10-15 20:09:50,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION [2021-10-15 20:09:50,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-10-15 20:09:50,222 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-10-15 20:09:50,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION [2021-10-15 20:09:50,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION [2021-10-15 20:09:50,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION [2021-10-15 20:09:50,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-10-15 20:09:50,223 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-10-15 20:09:50,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40REQUIRES_VIOLATION [2021-10-15 20:09:50,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41REQUIRES_VIOLATION [2021-10-15 20:09:50,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42REQUIRES_VIOLATION [2021-10-15 20:09:50,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43REQUIRES_VIOLATION [2021-10-15 20:09:50,224 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44REQUIRES_VIOLATION [2021-10-15 20:09:50,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr45REQUIRES_VIOLATION [2021-10-15 20:09:50,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr46REQUIRES_VIOLATION [2021-10-15 20:09:50,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr47REQUIRES_VIOLATION [2021-10-15 20:09:50,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr48REQUIRES_VIOLATION [2021-10-15 20:09:50,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr49REQUIRES_VIOLATION [2021-10-15 20:09:50,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr50ASSERT_VIOLATIONMEMORY_LEAK [2021-10-15 20:09:50,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr51REQUIRES_VIOLATION [2021-10-15 20:09:50,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr52REQUIRES_VIOLATION [2021-10-15 20:09:50,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr53REQUIRES_VIOLATION [2021-10-15 20:09:50,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr54REQUIRES_VIOLATION [2021-10-15 20:09:50,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr55ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 20:09:50,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr56ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 20:09:50,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr57ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 20:09:50,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-10-15 20:09:50,235 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:09:50,264 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-15 20:09:50,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:09:50 BoogieIcfgContainer [2021-10-15 20:09:50,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:09:50,301 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:09:50,301 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:09:50,302 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:09:50,302 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:08:48" (3/4) ... [2021-10-15 20:09:50,306 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 20:09:50,306 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:09:50,307 INFO L168 Benchmark]: Toolchain (without parser) took 63539.00 ms. Allocated memory was 88.1 MB in the beginning and 224.4 MB in the end (delta: 136.3 MB). Free memory was 64.2 MB in the beginning and 127.5 MB in the end (delta: -63.3 MB). Peak memory consumption was 71.8 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:50,307 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 88.1 MB. Free memory was 62.9 MB in the beginning and 62.8 MB in the end (delta: 41.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:09:50,308 INFO L168 Benchmark]: CACSL2BoogieTranslator took 665.27 ms. Allocated memory is still 88.1 MB. Free memory was 64.0 MB in the beginning and 56.2 MB in the end (delta: 7.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:50,308 INFO L168 Benchmark]: Boogie Preprocessor took 88.34 ms. Allocated memory is still 88.1 MB. Free memory was 56.2 MB in the beginning and 53.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:50,308 INFO L168 Benchmark]: RCFGBuilder took 1036.71 ms. Allocated memory was 88.1 MB in the beginning and 127.9 MB in the end (delta: 39.8 MB). Free memory was 53.3 MB in the beginning and 88.9 MB in the end (delta: -35.6 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:50,310 INFO L168 Benchmark]: TraceAbstraction took 61731.01 ms. Allocated memory was 127.9 MB in the beginning and 224.4 MB in the end (delta: 96.5 MB). Free memory was 88.0 MB in the beginning and 128.5 MB in the end (delta: -40.6 MB). Peak memory consumption was 55.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:09:50,310 INFO L168 Benchmark]: Witness Printer took 4.78 ms. Allocated memory is still 224.4 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:09:50,313 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 88.1 MB. Free memory was 62.9 MB in the beginning and 62.8 MB in the end (delta: 41.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 665.27 ms. Allocated memory is still 88.1 MB. Free memory was 64.0 MB in the beginning and 56.2 MB in the end (delta: 7.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 88.34 ms. Allocated memory is still 88.1 MB. Free memory was 56.2 MB in the beginning and 53.3 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1036.71 ms. Allocated memory was 88.1 MB in the beginning and 127.9 MB in the end (delta: 39.8 MB). Free memory was 53.3 MB in the beginning and 88.9 MB in the end (delta: -35.6 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 61731.01 ms. Allocated memory was 127.9 MB in the beginning and 224.4 MB in the end (delta: 96.5 MB). Free memory was 88.0 MB in the beginning and 128.5 MB in the end (delta: -40.6 MB). Peak memory consumption was 55.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.78 ms. Allocated memory is still 224.4 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 997]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 997. Possible FailurePath: [L1000] SLL* head = malloc(sizeof(SLL)); [L1001] head->next = ((void*)0) VAL [head={-2:0}] [L1002] head->prev = ((void*)0) VAL [head={-2:0}] [L1003] head->data = 0 VAL [head={-2:0}] [L1005] SLL* x = head; VAL [head={-2:0}, x={-2:0}] [L1008] COND FALSE !(__VERIFIER_nondet_int()) [L1019] COND FALSE !(__VERIFIER_nondet_int()) [L1029] x = head VAL [head={-2:0}, x={-2:0}] [L1030] EXPR x->next VAL [head={-2:0}, x={-2:0}, x->next={0:0}] [L1030] COND FALSE !(x->next != ((void*)0)) [L1037] EXPR x->next VAL [head={-2:0}, x={-2:0}, x->next={0:0}] [L1037] SLL* y = x->next; [L1038] x->next = malloc(sizeof(SLL)) VAL [head={-2:0}, malloc(sizeof(SLL))={-1:0}, x={-2:0}, y={0:0}] [L1039] x->data = 1 VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1040] x->next = y VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1041] COND FALSE !(y != ((void*)0)) VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1049] x = head VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1052] EXPR x->data VAL [head={-2:0}, x={-2:0}, x->data=1, y={0:0}] [L1052] COND FALSE !(x->data != 1) [L1058] EXPR x->next VAL [head={-2:0}, x={-2:0}, x->next={0:0}, y={0:0}] [L1058] x = x->next [L1059] COND FALSE !(\read(*x)) VAL [head={-2:0}, x={0:0}, y={0:0}] [L1067] x = head VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1068] COND TRUE x != ((void*)0) [L1070] head = x VAL [head={-2:0}, x={-2:0}, y={0:0}] [L1071] EXPR x->next VAL [head={-2:0}, x={-2:0}, x->next={0:0}, y={0:0}] [L1071] x = x->next [L1072] free(head) VAL [head={-2:0}, x={0:0}, y={0:0}] [L1072] free(head) VAL [head={-2:0}, x={0:0}, y={0:0}] [L1072] free(head) [L1068] COND FALSE !(x != ((void*)0)) VAL [head={-2:0}, x={0:0}, y={0:0}] [L1075] return 0; VAL [\result=0, head={-2:0}, x={0:0}, y={0:0}] - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1002]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1002]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1013]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1013]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1014]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1014]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1037]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1037]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1039]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1039]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1040]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1040]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1054]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1054]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1071]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1071]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1072]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1072]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1072]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 131 locations, 59 error locations. Started 1 CEGAR loops. OverallTime: 61557.3ms, OverallIterations: 31, TraceHistogramMax: 2, EmptinessCheckTime: 52.8ms, AutomataDifference: 32930.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 23.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2066 SDtfs, 6502 SDslu, 9009 SDs, 0 SdLazy, 21948 SolverSat, 1573 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 19602.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 978 GetRequests, 333 SyntacticMatches, 23 SemanticMatches, 622 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5196 ImplicationChecksByTransitivity, 16317.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=236occurred in iteration=30, InterpolantAutomatonStates: 451, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 327.6ms AutomataMinimizationTime, 30 MinimizatonAttempts, 1235 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 218.6ms SsaConstructionTime, 887.7ms SatisfiabilityAnalysisTime, 20138.2ms InterpolantComputationTime, 1196 NumberOfCodeBlocks, 1196 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 1116 ConstructedInterpolants, 94 QuantifiedInterpolants, 16318 SizeOfPredicates, 143 NumberOfNonLiveVariables, 2335 ConjunctsInSsa, 409 ConjunctsInUnsatCore, 41 InterpolantComputations, 20 PerfectInterpolantSequences, 19/66 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-15 20:09:50,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-15 20:09:53,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-15 20:09:53,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-15 20:09:53,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-15 20:09:53,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-15 20:09:53,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-15 20:09:53,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-15 20:09:53,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-15 20:09:53,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-15 20:09:53,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-15 20:09:53,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-15 20:09:53,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-15 20:09:53,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-15 20:09:53,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-15 20:09:53,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-15 20:09:53,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-15 20:09:53,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-15 20:09:53,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-15 20:09:53,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-15 20:09:53,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-15 20:09:53,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-15 20:09:53,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-15 20:09:53,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-15 20:09:53,200 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-15 20:09:53,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-15 20:09:53,210 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-15 20:09:53,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-15 20:09:53,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-15 20:09:53,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-15 20:09:53,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-15 20:09:53,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-15 20:09:53,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-15 20:09:53,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-15 20:09:53,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-15 20:09:53,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-15 20:09:53,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-15 20:09:53,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-15 20:09:53,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-15 20:09:53,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-15 20:09:53,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-15 20:09:53,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-15 20:09:53,238 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-15 20:09:53,298 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-15 20:09:53,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-15 20:09:53,299 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-15 20:09:53,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-15 20:09:53,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-15 20:09:53,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-15 20:09:53,303 INFO L138 SettingsManager]: * Use SBE=true [2021-10-15 20:09:53,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-15 20:09:53,304 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-15 20:09:53,304 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-15 20:09:53,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-15 20:09:53,306 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-15 20:09:53,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-15 20:09:53,306 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-15 20:09:53,307 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-15 20:09:53,307 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-15 20:09:53,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-15 20:09:53,308 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-15 20:09:53,308 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-15 20:09:53,308 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-15 20:09:53,309 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-15 20:09:53,309 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-15 20:09:53,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-15 20:09:53,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-15 20:09:53,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-15 20:09:53,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:09:53,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-15 20:09:53,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-15 20:09:53,311 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-15 20:09:53,311 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-15 20:09:53,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-15 20:09:53,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-15 20:09:53,313 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af5a9640b82bb5981acfe21e6355734b41317c49 [2021-10-15 20:09:53,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-15 20:09:53,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-15 20:09:53,832 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-15 20:09:53,834 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-15 20:09:53,835 INFO L275 PluginConnector]: CDTParser initialized [2021-10-15 20:09:53,838 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2021-10-15 20:09:53,930 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/data/aa6f4f9e0/7879c8d15a3e41efbffed861166d2242/FLAG14176fa55 [2021-10-15 20:09:54,672 INFO L306 CDTParser]: Found 1 translation units. [2021-10-15 20:09:54,674 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2021-10-15 20:09:54,698 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/data/aa6f4f9e0/7879c8d15a3e41efbffed861166d2242/FLAG14176fa55 [2021-10-15 20:09:54,889 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/data/aa6f4f9e0/7879c8d15a3e41efbffed861166d2242 [2021-10-15 20:09:54,898 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-15 20:09:54,900 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-15 20:09:54,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-15 20:09:54,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-15 20:09:54,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-15 20:09:54,911 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:09:54" (1/1) ... [2021-10-15 20:09:54,912 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fa2c985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:54, skipping insertion in model container [2021-10-15 20:09:54,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 08:09:54" (1/1) ... [2021-10-15 20:09:54,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-15 20:09:54,966 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-15 20:09:55,291 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_75f5c7fe-35d5-4bc4-a374-13e5019171d7/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i[22778,22791] [2021-10-15 20:09:55,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:09:55,342 INFO L203 MainTranslator]: Completed pre-run [2021-10-15 20:09:55,434 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_75f5c7fe-35d5-4bc4-a374-13e5019171d7/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i[22778,22791] [2021-10-15 20:09:55,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-15 20:09:55,493 INFO L208 MainTranslator]: Completed translation [2021-10-15 20:09:55,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:55 WrapperNode [2021-10-15 20:09:55,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-15 20:09:55,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-15 20:09:55,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-15 20:09:55,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-15 20:09:55,511 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:55" (1/1) ... [2021-10-15 20:09:55,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:55" (1/1) ... [2021-10-15 20:09:55,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:55" (1/1) ... [2021-10-15 20:09:55,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:55" (1/1) ... [2021-10-15 20:09:55,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:55" (1/1) ... [2021-10-15 20:09:55,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:55" (1/1) ... [2021-10-15 20:09:55,621 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:55" (1/1) ... [2021-10-15 20:09:55,630 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-15 20:09:55,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-15 20:09:55,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-15 20:09:55,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-15 20:09:55,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:55" (1/1) ... [2021-10-15 20:09:55,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-15 20:09:55,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:09:55,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-15 20:09:55,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-15 20:09:55,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-15 20:09:55,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-15 20:09:55,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-15 20:09:55,729 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-15 20:09:55,730 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-15 20:09:55,730 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-15 20:09:55,730 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-15 20:09:55,731 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-15 20:09:55,731 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-15 20:09:55,731 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-15 20:09:55,732 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-15 20:09:55,732 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-15 20:09:55,732 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-15 20:09:55,732 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-15 20:09:55,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-15 20:09:55,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-15 20:09:55,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-15 20:09:55,733 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-15 20:09:55,734 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-15 20:09:55,734 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-15 20:09:55,734 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-15 20:09:55,734 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-15 20:09:55,735 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-15 20:09:55,735 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-15 20:09:55,735 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-15 20:09:55,735 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-15 20:09:55,736 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-15 20:09:55,736 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-15 20:09:55,736 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-15 20:09:55,736 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-15 20:09:55,737 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-15 20:09:55,737 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-15 20:09:55,737 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-15 20:09:55,738 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-15 20:09:55,738 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-15 20:09:55,738 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-15 20:09:55,738 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-15 20:09:55,739 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-15 20:09:55,739 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-15 20:09:55,739 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-15 20:09:55,739 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-15 20:09:55,740 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-15 20:09:55,740 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-15 20:09:55,740 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-15 20:09:55,740 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-15 20:09:55,741 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-15 20:09:55,741 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-15 20:09:55,741 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-15 20:09:55,741 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-15 20:09:55,742 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-15 20:09:55,742 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-15 20:09:55,742 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-15 20:09:55,742 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-15 20:09:55,743 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-15 20:09:55,743 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-15 20:09:55,743 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-15 20:09:55,744 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-15 20:09:55,744 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-15 20:09:55,744 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-15 20:09:55,744 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-10-15 20:09:55,745 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-15 20:09:55,745 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-15 20:09:55,745 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-15 20:09:55,745 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-15 20:09:55,746 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-15 20:09:55,746 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-15 20:09:55,746 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-15 20:09:55,746 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-15 20:09:55,747 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-15 20:09:55,747 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-15 20:09:55,747 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-15 20:09:55,747 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-15 20:09:55,748 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-15 20:09:55,748 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-15 20:09:55,748 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-15 20:09:55,748 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-15 20:09:55,749 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-15 20:09:55,749 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-15 20:09:55,749 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-15 20:09:55,749 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-15 20:09:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-15 20:09:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-15 20:09:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-15 20:09:55,750 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-15 20:09:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-15 20:09:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-15 20:09:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-15 20:09:55,751 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-15 20:09:55,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-15 20:09:55,752 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-15 20:09:55,752 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-15 20:09:55,752 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-15 20:09:55,753 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-15 20:09:55,753 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-15 20:09:55,753 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-15 20:09:55,753 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-15 20:09:55,754 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-15 20:09:55,754 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-15 20:09:55,754 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-15 20:09:55,754 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-15 20:09:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-15 20:09:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-15 20:09:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-15 20:09:55,755 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-15 20:09:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-15 20:09:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-15 20:09:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-15 20:09:55,756 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-15 20:09:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-15 20:09:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-15 20:09:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-15 20:09:55,757 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-15 20:09:55,758 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-15 20:09:55,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-15 20:09:55,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-15 20:09:55,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-15 20:09:55,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-15 20:09:55,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-15 20:09:55,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-15 20:09:55,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-15 20:09:55,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-15 20:09:55,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-15 20:09:55,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-15 20:09:55,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-15 20:09:55,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-15 20:09:55,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-15 20:09:55,761 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-15 20:09:56,848 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-15 20:09:56,849 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-15 20:09:56,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:09:56 BoogieIcfgContainer [2021-10-15 20:09:56,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-15 20:09:56,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-15 20:09:56,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-15 20:09:56,858 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-15 20:09:56,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 08:09:54" (1/3) ... [2021-10-15 20:09:56,860 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448a52f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:09:56, skipping insertion in model container [2021-10-15 20:09:56,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 08:09:55" (2/3) ... [2021-10-15 20:09:56,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@448a52f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 08:09:56, skipping insertion in model container [2021-10-15 20:09:56,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:09:56" (3/3) ... [2021-10-15 20:09:56,863 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-simple-white-blue-2.i [2021-10-15 20:09:56,870 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-15 20:09:56,870 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2021-10-15 20:09:56,928 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-15 20:09:56,937 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-15 20:09:56,937 INFO L340 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2021-10-15 20:09:56,959 INFO L276 IsEmpty]: Start isEmpty. Operand has 126 states, 62 states have (on average 2.225806451612903) internal successors, (138), 121 states have internal predecessors, (138), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-15 20:09:56,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-15 20:09:56,969 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:56,970 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:56,971 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:56,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:56,978 INFO L82 PathProgramCache]: Analyzing trace with hash -26841262, now seen corresponding path program 1 times [2021-10-15 20:09:56,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:09:56,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772017215] [2021-10-15 20:09:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:56,995 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:09:56,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:09:57,000 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:09:57,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-15 20:09:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:57,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-15 20:09:57,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:57,346 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 [2021-10-15 20:09:57,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:57,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:09:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:57,434 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:09:57,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772017215] [2021-10-15 20:09:57,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772017215] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:09:57,436 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:09:57,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-15 20:09:57,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053389972] [2021-10-15 20:09:57,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-15 20:09:57,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:09:57,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-15 20:09:57,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:09:57,465 INFO L87 Difference]: Start difference. First operand has 126 states, 62 states have (on average 2.225806451612903) internal successors, (138), 121 states have internal predecessors, (138), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:57,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:57,910 INFO L93 Difference]: Finished difference Result 152 states and 162 transitions. [2021-10-15 20:09:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:09:57,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-15 20:09:57,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:57,926 INFO L225 Difference]: With dead ends: 152 [2021-10-15 20:09:57,927 INFO L226 Difference]: Without dead ends: 148 [2021-10-15 20:09:57,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-15 20:09:57,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-10-15 20:09:57,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 119. [2021-10-15 20:09:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 60 states have (on average 2.05) internal successors, (123), 115 states have internal predecessors, (123), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:57,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 126 transitions. [2021-10-15 20:09:57,993 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 126 transitions. Word has length 7 [2021-10-15 20:09:57,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:57,994 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 126 transitions. [2021-10-15 20:09:57,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:57,994 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 126 transitions. [2021-10-15 20:09:57,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-15 20:09:57,995 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:57,995 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:58,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-15 20:09:58,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:09:58,197 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:58,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:58,198 INFO L82 PathProgramCache]: Analyzing trace with hash -26841261, now seen corresponding path program 1 times [2021-10-15 20:09:58,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:09:58,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102381075] [2021-10-15 20:09:58,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:58,199 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:09:58,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:09:58,201 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:09:58,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-15 20:09:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:58,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-15 20:09:58,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:58,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 20:09:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:58,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:09:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:58,522 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:09:58,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102381075] [2021-10-15 20:09:58,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102381075] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:09:58,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:09:58,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-15 20:09:58,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620324360] [2021-10-15 20:09:58,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:09:58,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:09:58,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:09:58,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:09:58,530 INFO L87 Difference]: Start difference. First operand 119 states and 126 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:59,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:09:59,164 INFO L93 Difference]: Finished difference Result 145 states and 154 transitions. [2021-10-15 20:09:59,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-15 20:09:59,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-10-15 20:09:59,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:09:59,167 INFO L225 Difference]: With dead ends: 145 [2021-10-15 20:09:59,168 INFO L226 Difference]: Without dead ends: 145 [2021-10-15 20:09:59,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:09:59,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-15 20:09:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 116. [2021-10-15 20:09:59,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 60 states have (on average 2.0) internal successors, (120), 112 states have internal predecessors, (120), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:59,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2021-10-15 20:09:59,182 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 7 [2021-10-15 20:09:59,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:09:59,182 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2021-10-15 20:09:59,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:09:59,183 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2021-10-15 20:09:59,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-15 20:09:59,184 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:09:59,184 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:09:59,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-15 20:09:59,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:09:59,398 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:09:59,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:09:59,398 INFO L82 PathProgramCache]: Analyzing trace with hash 125737015, now seen corresponding path program 1 times [2021-10-15 20:09:59,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:09:59,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244089153] [2021-10-15 20:09:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:09:59,400 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:09:59,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:09:59,402 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:09:59,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-15 20:09:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:09:59,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 20:09:59,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:09:59,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 20:09:59,670 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-15 20:09:59,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2021-10-15 20:09:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:59,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:09:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:09:59,836 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:09:59,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244089153] [2021-10-15 20:09:59,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244089153] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:09:59,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:09:59,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-15 20:09:59,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582859697] [2021-10-15 20:09:59,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:09:59,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:09:59,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:09:59,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:09:59,851 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:00,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:10:00,424 INFO L93 Difference]: Finished difference Result 116 states and 123 transitions. [2021-10-15 20:10:00,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-15 20:10:00,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-15 20:10:00,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:10:00,427 INFO L225 Difference]: With dead ends: 116 [2021-10-15 20:10:00,427 INFO L226 Difference]: Without dead ends: 116 [2021-10-15 20:10:00,427 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 10 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:10:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-15 20:10:00,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2021-10-15 20:10:00,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 68 states have (on average 1.7352941176470589) internal successors, (118), 104 states have internal predecessors, (118), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:00,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 121 transitions. [2021-10-15 20:10:00,442 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 121 transitions. Word has length 12 [2021-10-15 20:10:00,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:10:00,442 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 121 transitions. [2021-10-15 20:10:00,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:00,443 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 121 transitions. [2021-10-15 20:10:00,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-15 20:10:00,444 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:10:00,444 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:10:00,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-15 20:10:00,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:10:00,654 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:10:00,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:10:00,655 INFO L82 PathProgramCache]: Analyzing trace with hash 125737016, now seen corresponding path program 1 times [2021-10-15 20:10:00,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:10:00,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [360527687] [2021-10-15 20:10:00,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:10:00,656 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:10:00,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:10:00,658 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:10:00,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-15 20:10:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:10:00,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-15 20:10:00,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:10:00,893 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 [2021-10-15 20:10:01,008 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 20:10:01,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-15 20:10:01,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:10:01,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:10:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:10:01,478 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:10:01,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [360527687] [2021-10-15 20:10:01,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [360527687] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:10:01,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:10:01,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-10-15 20:10:01,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063844964] [2021-10-15 20:10:01,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:10:01,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:10:01,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:10:01,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:10:01,481 INFO L87 Difference]: Start difference. First operand 108 states and 121 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:02,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:10:02,548 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2021-10-15 20:10:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:10:02,550 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-10-15 20:10:02,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:10:02,552 INFO L225 Difference]: With dead ends: 144 [2021-10-15 20:10:02,552 INFO L226 Difference]: Without dead ends: 144 [2021-10-15 20:10:02,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 292.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:10:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-10-15 20:10:02,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 116. [2021-10-15 20:10:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 84 states have (on average 1.5357142857142858) internal successors, (129), 112 states have internal predecessors, (129), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:02,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2021-10-15 20:10:02,566 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 12 [2021-10-15 20:10:02,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:10:02,567 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2021-10-15 20:10:02,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:02,567 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2021-10-15 20:10:02,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 20:10:02,568 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:10:02,568 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:10:02,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-15 20:10:02,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:10:02,782 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr10REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:10:02,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:10:02,783 INFO L82 PathProgramCache]: Analyzing trace with hash 619955620, now seen corresponding path program 1 times [2021-10-15 20:10:02,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:10:02,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [675881389] [2021-10-15 20:10:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:10:02,785 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:10:02,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:10:02,786 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:10:02,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-15 20:10:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:10:02,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 20:10:02,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:10:03,001 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 [2021-10-15 20:10:03,019 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 20 treesize of output 16 [2021-10-15 20:10:03,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-10-15 20:10:03,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:10:03,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:10:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:10:03,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:10:03,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [675881389] [2021-10-15 20:10:03,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [675881389] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:10:03,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:10:03,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-15 20:10:03,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449079865] [2021-10-15 20:10:03,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-15 20:10:03,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:10:03,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-15 20:10:03,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:10:03,164 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:10:03,755 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2021-10-15 20:10:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-15 20:10:03,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-15 20:10:03,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:10:03,758 INFO L225 Difference]: With dead ends: 115 [2021-10-15 20:10:03,759 INFO L226 Difference]: Without dead ends: 115 [2021-10-15 20:10:03,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:10:03,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-10-15 20:10:03,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-10-15 20:10:03,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 84 states have (on average 1.5238095238095237) internal successors, (128), 111 states have internal predecessors, (128), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 131 transitions. [2021-10-15 20:10:03,785 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 131 transitions. Word has length 15 [2021-10-15 20:10:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:10:03,785 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 131 transitions. [2021-10-15 20:10:03,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 131 transitions. [2021-10-15 20:10:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-15 20:10:03,794 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:10:03,794 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:10:03,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-15 20:10:04,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:10:04,014 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr11REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:10:04,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:10:04,015 INFO L82 PathProgramCache]: Analyzing trace with hash 619955621, now seen corresponding path program 1 times [2021-10-15 20:10:04,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:10:04,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021662147] [2021-10-15 20:10:04,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:10:04,015 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:10:04,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:10:04,016 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:10:04,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-15 20:10:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:10:04,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-15 20:10:04,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:10:04,253 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 [2021-10-15 20:10:04,285 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 17 treesize of output 13 [2021-10-15 20:10:04,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:10:04,359 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 31 treesize of output 23 [2021-10-15 20:10:04,369 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 20 treesize of output 12 [2021-10-15 20:10:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:10:04,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:10:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:10:04,706 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:10:04,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021662147] [2021-10-15 20:10:04,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021662147] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:10:04,707 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:10:04,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-15 20:10:04,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365769912] [2021-10-15 20:10:04,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:10:04,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:10:04,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:10:04,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:10:04,711 INFO L87 Difference]: Start difference. First operand 115 states and 131 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:06,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:10:06,130 INFO L93 Difference]: Finished difference Result 114 states and 130 transitions. [2021-10-15 20:10:06,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-15 20:10:06,131 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-10-15 20:10:06,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:10:06,132 INFO L225 Difference]: With dead ends: 114 [2021-10-15 20:10:06,132 INFO L226 Difference]: Without dead ends: 114 [2021-10-15 20:10:06,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 310.6ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:10:06,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-15 20:10:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-10-15 20:10:06,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 84 states have (on average 1.5119047619047619) internal successors, (127), 110 states have internal predecessors, (127), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:06,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2021-10-15 20:10:06,141 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 15 [2021-10-15 20:10:06,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:10:06,142 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2021-10-15 20:10:06,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:06,142 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2021-10-15 20:10:06,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-15 20:10:06,143 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:10:06,143 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:10:06,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-15 20:10:06,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:10:06,358 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:10:06,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:10:06,358 INFO L82 PathProgramCache]: Analyzing trace with hash 2102405272, now seen corresponding path program 1 times [2021-10-15 20:10:06,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:10:06,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759814290] [2021-10-15 20:10:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:10:06,359 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:10:06,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:10:06,366 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:10:06,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-15 20:10:06,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:10:06,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 20:10:06,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:10:06,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:10:06,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:10:06,694 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-15 20:10:06,695 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 21 treesize of output 20 [2021-10-15 20:10:06,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:10:06,716 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 21 treesize of output 20 [2021-10-15 20:10:06,830 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-15 20:10:06,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2021-10-15 20:10:06,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:10:06,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:10:06,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:10:06,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-15 20:10:07,010 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-15 20:10:07,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-10-15 20:10:07,020 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-15 20:10:07,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-10-15 20:10:07,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:10:07,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:10:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:10:07,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:10:07,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759814290] [2021-10-15 20:10:07,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759814290] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:10:07,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:10:07,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 7 [2021-10-15 20:10:07,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060111462] [2021-10-15 20:10:07,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:10:07,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:10:07,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:10:07,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:10:07,237 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:10:07,873 INFO L93 Difference]: Finished difference Result 121 states and 138 transitions. [2021-10-15 20:10:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:10:07,874 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-10-15 20:10:07,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:10:07,875 INFO L225 Difference]: With dead ends: 121 [2021-10-15 20:10:07,875 INFO L226 Difference]: Without dead ends: 121 [2021-10-15 20:10:07,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 205.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:10:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-15 20:10:07,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2021-10-15 20:10:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 87 states have (on average 1.5057471264367817) internal successors, (131), 113 states have internal predecessors, (131), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 134 transitions. [2021-10-15 20:10:07,883 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 134 transitions. Word has length 18 [2021-10-15 20:10:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:10:07,884 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 134 transitions. [2021-10-15 20:10:07,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 134 transitions. [2021-10-15 20:10:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-15 20:10:07,885 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:10:07,886 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:10:07,901 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-15 20:10:08,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:10:08,095 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:10:08,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:10:08,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1419700134, now seen corresponding path program 1 times [2021-10-15 20:10:08,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:10:08,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078774139] [2021-10-15 20:10:08,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:10:08,096 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:10:08,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:10:08,097 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:10:08,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-15 20:10:08,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:10:08,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-15 20:10:08,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:10:08,348 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 [2021-10-15 20:10:08,425 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-15 20:10:08,425 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 24 treesize of output 31 [2021-10-15 20:10:08,533 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 24 treesize of output 20 [2021-10-15 20:10:08,773 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-15 20:10:08,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 33 [2021-10-15 20:10:08,916 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-15 20:10:08,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 44 [2021-10-15 20:10:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:10:09,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:10:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:10:21,240 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:10:21,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078774139] [2021-10-15 20:10:21,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078774139] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:10:21,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:10:21,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 6] imperfect sequences [] total 13 [2021-10-15 20:10:21,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408757663] [2021-10-15 20:10:21,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-15 20:10:21,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:10:21,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-15 20:10:21,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=134, Unknown=3, NotChecked=0, Total=182 [2021-10-15 20:10:21,242 INFO L87 Difference]: Start difference. First operand 117 states and 134 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:34,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:10:34,915 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2021-10-15 20:10:34,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 20:10:34,916 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-15 20:10:34,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:10:34,917 INFO L225 Difference]: With dead ends: 131 [2021-10-15 20:10:34,917 INFO L226 Difference]: Without dead ends: 131 [2021-10-15 20:10:34,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 14920.3ms TimeCoverageRelationStatistics Valid=171, Invalid=426, Unknown=3, NotChecked=0, Total=600 [2021-10-15 20:10:34,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-15 20:10:34,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 116. [2021-10-15 20:10:34,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 87 states have (on average 1.4942528735632183) internal successors, (130), 112 states have internal predecessors, (130), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:34,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 133 transitions. [2021-10-15 20:10:34,924 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 133 transitions. Word has length 19 [2021-10-15 20:10:34,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:10:34,925 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 133 transitions. [2021-10-15 20:10:34,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:34,925 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 133 transitions. [2021-10-15 20:10:34,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-15 20:10:34,926 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:10:34,927 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:10:34,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-15 20:10:35,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:10:35,142 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:10:35,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:10:35,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1419700135, now seen corresponding path program 1 times [2021-10-15 20:10:35,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:10:35,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088425115] [2021-10-15 20:10:35,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:10:35,143 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:10:35,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:10:35,144 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:10:35,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-15 20:10:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:10:35,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-15 20:10:35,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:10:35,465 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 [2021-10-15 20:10:35,532 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 20:10:35,532 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 18 treesize of output 18 [2021-10-15 20:10:35,544 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 [2021-10-15 20:10:35,587 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 21 treesize of output 17 [2021-10-15 20:10:35,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:10:35,779 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-15 20:10:35,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 49 [2021-10-15 20:10:35,810 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-10-15 20:10:35,811 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 59 treesize of output 54 [2021-10-15 20:10:35,969 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-15 20:10:35,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 42 [2021-10-15 20:10:35,979 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-10-15 20:10:35,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-10-15 20:10:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:10:36,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:10:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:10:47,418 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:10:47,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088425115] [2021-10-15 20:10:47,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088425115] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:10:47,419 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:10:47,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2021-10-15 20:10:47,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742818908] [2021-10-15 20:10:47,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-15 20:10:47,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:10:47,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-15 20:10:47,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=196, Unknown=1, NotChecked=0, Total=240 [2021-10-15 20:10:47,421 INFO L87 Difference]: Start difference. First operand 116 states and 133 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:10:59,996 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset))) (and (not (= .cse0 c_main_~x~0.base)) (= (select |c_#length| .cse0) (_ bv12 32)) (= c_main_~x~0.offset (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_main_~x~0.base) c_main_~x~0.offset) (_ bv0 32)) (= (select |c_#length| c_main_~x~0.base) (_ bv12 32)) (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse1 (bvadd |main_#t~mem6.offset| (_ bv4 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base|) .cse1 c_main_~x~0.offset)) c_main_~x~0.base) c_main_~x~0.offset) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem6.base|) .cse1 c_main_~x~0.base)) c_main_~x~0.base) c_main_~x~0.offset))))) (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base|) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~x~0.offset)) c_main_~x~0.base) c_main_~x~0.offset))) (bvule (bvadd (_ bv8 32) .cse2) (bvadd .cse2 (_ bv12 32))))) (exists ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset)) (.cse4 (bvadd |main_#t~mem6.offset| (_ bv4 32)))) (and (= (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4) c_main_~x~0.offset) (= c_main_~x~0.base (select (select |c_#memory_$Pointer$.base| .cse3) .cse4))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~head~0.base))))) (_ bv1 1))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~x~0.base)))))) (_ bv1 1))))) is different from false [2021-10-15 20:11:11,161 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset))) (and (not (= .cse0 c_main_~x~0.base)) (= (select |c_#length| .cse0) (_ bv12 32)) (= c_main_~x~0.offset (_ bv0 32)) (= (select (select |c_#memory_$Pointer$.offset| c_main_~x~0.base) c_main_~x~0.offset) (_ bv0 32)) (= (select |c_#length| c_main_~x~0.base) (_ bv12 32)) (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse1 (bvadd |main_#t~mem6.offset| (_ bv4 32)))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base|) .cse1 c_main_~x~0.offset)) c_main_~x~0.base) c_main_~x~0.offset) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.base| |c_main_#t~mem6.base|) .cse1 c_main_~x~0.base)) c_main_~x~0.base) c_main_~x~0.offset))))) (forall ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base| (store (select |c_#memory_$Pointer$.offset| |c_main_#t~mem6.base|) (bvadd |main_#t~mem6.offset| (_ bv4 32)) c_main_~x~0.offset)) c_main_~x~0.base) c_main_~x~0.offset))) (bvule (bvadd (_ bv8 32) .cse2) (bvadd .cse2 (_ bv12 32))))) (exists ((|main_#t~mem6.offset| (_ BitVec 32))) (let ((.cse3 (select (select |c_#memory_$Pointer$.base| c_main_~x~0.base) c_main_~x~0.offset)) (.cse4 (bvadd |main_#t~mem6.offset| (_ bv4 32)))) (and (= (select (select |c_#memory_$Pointer$.offset| .cse3) .cse4) c_main_~x~0.offset) (= c_main_~x~0.base (select (select |c_#memory_$Pointer$.base| .cse3) .cse4))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| c_main_~x~0.base)))))) (_ bv1 1))))) is different from false [2021-10-15 20:11:11,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:11:11,595 INFO L93 Difference]: Finished difference Result 207 states and 237 transitions. [2021-10-15 20:11:11,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-15 20:11:11,597 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-10-15 20:11:11,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:11:11,598 INFO L225 Difference]: With dead ends: 207 [2021-10-15 20:11:11,599 INFO L226 Difference]: Without dead ends: 207 [2021-10-15 20:11:11,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 8 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 31059.7ms TimeCoverageRelationStatistics Valid=331, Invalid=1152, Unknown=7, NotChecked=150, Total=1640 [2021-10-15 20:11:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-10-15 20:11:11,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 112. [2021-10-15 20:11:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.4651162790697674) internal successors, (126), 108 states have internal predecessors, (126), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 129 transitions. [2021-10-15 20:11:11,606 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 129 transitions. Word has length 19 [2021-10-15 20:11:11,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:11:11,607 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 129 transitions. [2021-10-15 20:11:11,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 129 transitions. [2021-10-15 20:11:11,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-15 20:11:11,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:11:11,609 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:11:11,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-10-15 20:11:11,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:11:11,824 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:11:11,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:11:11,824 INFO L82 PathProgramCache]: Analyzing trace with hash -937860754, now seen corresponding path program 1 times [2021-10-15 20:11:11,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:11:11,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [590224637] [2021-10-15 20:11:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:11:11,825 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:11:11,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:11:11,826 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:11:11,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-15 20:11:12,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:11:12,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-15 20:11:12,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:11:12,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-15 20:11:12,177 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 18 treesize of output 10 [2021-10-15 20:11:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:11:12,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:11:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:11:12,486 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:11:12,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [590224637] [2021-10-15 20:11:12,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [590224637] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:11:12,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:11:12,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-10-15 20:11:12,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319892303] [2021-10-15 20:11:12,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-15 20:11:12,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:11:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-15 20:11:12,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-10-15 20:11:12,488 INFO L87 Difference]: Start difference. First operand 112 states and 129 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:13,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:11:13,064 INFO L93 Difference]: Finished difference Result 176 states and 198 transitions. [2021-10-15 20:11:13,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:11:13,065 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-15 20:11:13,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:11:13,067 INFO L225 Difference]: With dead ends: 176 [2021-10-15 20:11:13,067 INFO L226 Difference]: Without dead ends: 176 [2021-10-15 20:11:13,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 144.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:11:13,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-10-15 20:11:13,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 124. [2021-10-15 20:11:13,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 98 states have (on average 1.4285714285714286) internal successors, (140), 120 states have internal predecessors, (140), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2021-10-15 20:11:13,074 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 22 [2021-10-15 20:11:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:11:13,074 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2021-10-15 20:11:13,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:13,075 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2021-10-15 20:11:13,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-15 20:11:13,076 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:11:13,076 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:11:13,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-15 20:11:13,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:11:13,287 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr42REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:11:13,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:11:13,287 INFO L82 PathProgramCache]: Analyzing trace with hash -359370924, now seen corresponding path program 1 times [2021-10-15 20:11:13,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:11:13,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940281482] [2021-10-15 20:11:13,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:11:13,288 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:11:13,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:11:13,289 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:11:13,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-15 20:11:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:11:13,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 20:11:13,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:11:13,679 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 [2021-10-15 20:11:13,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:11:13,715 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 25 treesize of output 13 [2021-10-15 20:11:13,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:11:13,736 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 29 treesize of output 13 [2021-10-15 20:11:13,807 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 [2021-10-15 20:11:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:11:13,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:11:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:11:14,015 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:11:14,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940281482] [2021-10-15 20:11:14,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940281482] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:11:14,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:11:14,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2021-10-15 20:11:14,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081218275] [2021-10-15 20:11:14,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:11:14,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:11:14,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:11:14,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:11:14,018 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:14,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:11:14,939 INFO L93 Difference]: Finished difference Result 155 states and 175 transitions. [2021-10-15 20:11:14,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-15 20:11:14,941 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-10-15 20:11:14,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:11:14,942 INFO L225 Difference]: With dead ends: 155 [2021-10-15 20:11:14,942 INFO L226 Difference]: Without dead ends: 155 [2021-10-15 20:11:14,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-15 20:11:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-10-15 20:11:14,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 127. [2021-10-15 20:11:14,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 101 states have (on average 1.4158415841584158) internal successors, (143), 123 states have internal predecessors, (143), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2021-10-15 20:11:14,948 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 22 [2021-10-15 20:11:14,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:11:14,949 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2021-10-15 20:11:14,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2021-10-15 20:11:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-15 20:11:14,951 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:11:14,951 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:11:14,972 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-15 20:11:15,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:11:15,167 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:11:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:11:15,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1742772450, now seen corresponding path program 1 times [2021-10-15 20:11:15,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:11:15,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1920010192] [2021-10-15 20:11:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:11:15,168 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:11:15,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:11:15,169 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:11:15,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-15 20:11:15,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:11:15,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-15 20:11:15,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:11:15,493 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 [2021-10-15 20:11:15,573 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-15 20:11:15,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2021-10-15 20:11:15,643 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 [2021-10-15 20:11:15,717 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-15 20:11:15,717 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 45 treesize of output 44 [2021-10-15 20:11:16,017 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-15 20:11:16,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 46 [2021-10-15 20:11:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:11:16,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:11:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:11:16,444 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:11:16,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1920010192] [2021-10-15 20:11:16,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1920010192] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:11:16,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:11:16,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 6] imperfect sequences [] total 12 [2021-10-15 20:11:16,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158995078] [2021-10-15 20:11:16,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-15 20:11:16,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:11:16,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-15 20:11:16,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-15 20:11:16,447 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:18,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:11:18,572 INFO L93 Difference]: Finished difference Result 158 states and 177 transitions. [2021-10-15 20:11:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-15 20:11:18,573 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-15 20:11:18,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:11:18,575 INFO L225 Difference]: With dead ends: 158 [2021-10-15 20:11:18,575 INFO L226 Difference]: Without dead ends: 158 [2021-10-15 20:11:18,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 17 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 813.9ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-10-15 20:11:18,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-15 20:11:18,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 131. [2021-10-15 20:11:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 105 states have (on average 1.4190476190476191) internal successors, (149), 127 states have internal predecessors, (149), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 152 transitions. [2021-10-15 20:11:18,581 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 152 transitions. Word has length 23 [2021-10-15 20:11:18,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:11:18,581 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 152 transitions. [2021-10-15 20:11:18,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:18,582 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 152 transitions. [2021-10-15 20:11:18,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-15 20:11:18,583 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:11:18,583 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:11:18,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-15 20:11:18,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:11:18,784 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:11:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:11:18,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1742772451, now seen corresponding path program 1 times [2021-10-15 20:11:18,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:11:18,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [817324020] [2021-10-15 20:11:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:11:18,785 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:11:18,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:11:18,787 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:11:18,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-15 20:11:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:11:19,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-15 20:11:19,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:11:19,203 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 [2021-10-15 20:11:19,318 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 20:11:19,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-15 20:11:19,399 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 17 treesize of output 13 [2021-10-15 20:11:19,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:11:19,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:11:19,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-15 20:11:19,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:11:19,484 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 [2021-10-15 20:11:19,788 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 20:11:19,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 38 [2021-10-15 20:11:19,796 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 20:11:19,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2021-10-15 20:11:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:11:19,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:11:21,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:11:21,007 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:11:21,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [817324020] [2021-10-15 20:11:21,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [817324020] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:11:21,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:11:21,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [] total 14 [2021-10-15 20:11:21,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764536] [2021-10-15 20:11:21,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-15 20:11:21,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:11:21,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-15 20:11:21,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-15 20:11:21,009 INFO L87 Difference]: Start difference. First operand 131 states and 152 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:23,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:11:23,833 INFO L93 Difference]: Finished difference Result 190 states and 207 transitions. [2021-10-15 20:11:23,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-15 20:11:23,835 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2021-10-15 20:11:23,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:11:23,836 INFO L225 Difference]: With dead ends: 190 [2021-10-15 20:11:23,836 INFO L226 Difference]: Without dead ends: 190 [2021-10-15 20:11:23,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1368.3ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-10-15 20:11:23,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-10-15 20:11:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 133. [2021-10-15 20:11:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 107 states have (on average 1.411214953271028) internal successors, (151), 129 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:23,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 154 transitions. [2021-10-15 20:11:23,843 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 154 transitions. Word has length 23 [2021-10-15 20:11:23,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:11:23,843 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 154 transitions. [2021-10-15 20:11:23,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:23,844 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 154 transitions. [2021-10-15 20:11:23,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-15 20:11:23,845 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:11:23,845 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:11:23,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-10-15 20:11:24,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:11:24,055 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:11:24,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:11:24,056 INFO L82 PathProgramCache]: Analyzing trace with hash -232916121, now seen corresponding path program 1 times [2021-10-15 20:11:24,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:11:24,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578268629] [2021-10-15 20:11:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:11:24,056 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:11:24,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:11:24,057 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:11:24,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-15 20:11:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:11:24,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-15 20:11:24,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:11:24,504 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 [2021-10-15 20:11:24,557 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 [2021-10-15 20:11:24,644 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 20:11:24,644 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 18 treesize of output 18 [2021-10-15 20:11:24,710 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 [2021-10-15 20:11:24,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:11:24,813 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 43 treesize of output 39 [2021-10-15 20:11:24,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:11:24,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 20:11:24,834 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 20:11:24,835 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 1 case distinctions, treesize of input 36 treesize of output 27 [2021-10-15 20:11:24,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:11:24,904 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 21 treesize of output 20 [2021-10-15 20:11:24,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:11:24,924 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 53 treesize of output 52 [2021-10-15 20:11:24,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:11:24,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:11:24,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-15 20:11:24,936 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-10-15 20:11:24,937 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 1 case distinctions, treesize of input 49 treesize of output 36 [2021-10-15 20:11:25,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 20:11:25,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42 [2021-10-15 20:11:25,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-15 20:11:25,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 24 [2021-10-15 20:11:25,452 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 20:11:25,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2021-10-15 20:11:25,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:11:25,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:11:25,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2021-10-15 20:11:25,882 WARN L234 Elim1Store]: Array PQE input equivalent to true [2021-10-15 20:11:25,892 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 35 treesize of output 33 [2021-10-15 20:11:28,399 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_main_~x~0.base_103 (_ BitVec 32))) (or (not (= (_ bv1 32) (select (select (store |c_#memory_int| v_main_~x~0.base_103 (store (store (store (select |c_#memory_int| v_main_~x~0.base_103) (_ bv8 32) (_ bv1 32)) (_ bv0 32) v_DerPreprocessor_6) (_ bv4 32) v_DerPreprocessor_5)) c_main_~head~0.base) (bvadd c_main_~head~0.offset (_ bv8 32))))) (not (= (_ bv0 1) (select |c_#valid| v_main_~x~0.base_103))))) is different from false [2021-10-15 20:11:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:11:28,841 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:11:28,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578268629] [2021-10-15 20:11:28,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578268629] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:11:28,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:11:28,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 22 [2021-10-15 20:11:28,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7015538] [2021-10-15 20:11:28,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-15 20:11:28,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:11:28,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-15 20:11:28,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=363, Unknown=1, NotChecked=38, Total=462 [2021-10-15 20:11:28,847 INFO L87 Difference]: Start difference. First operand 133 states and 154 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:55,337 WARN L207 SmtUtils]: Spent 10.11 s on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2021-10-15 20:11:58,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:11:58,981 INFO L93 Difference]: Finished difference Result 197 states and 221 transitions. [2021-10-15 20:11:58,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-15 20:11:58,982 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-10-15 20:11:58,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:11:58,983 INFO L225 Difference]: With dead ends: 197 [2021-10-15 20:11:58,983 INFO L226 Difference]: Without dead ends: 197 [2021-10-15 20:11:58,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 30164.5ms TimeCoverageRelationStatistics Valid=155, Invalid=770, Unknown=9, NotChecked=58, Total=992 [2021-10-15 20:11:58,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-10-15 20:11:58,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 145. [2021-10-15 20:11:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 119 states have (on average 1.3781512605042017) internal successors, (164), 141 states have internal predecessors, (164), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 167 transitions. [2021-10-15 20:11:58,991 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 167 transitions. Word has length 25 [2021-10-15 20:11:58,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:11:58,991 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 167 transitions. [2021-10-15 20:11:58,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:11:58,992 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 167 transitions. [2021-10-15 20:11:58,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-15 20:11:58,993 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:11:58,993 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:11:59,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-15 20:11:59,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:11:59,231 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr58ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:11:59,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:11:59,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1368706167, now seen corresponding path program 1 times [2021-10-15 20:11:59,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:11:59,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [158817946] [2021-10-15 20:11:59,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:11:59,233 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:11:59,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:11:59,233 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:11:59,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-15 20:11:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:11:59,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-15 20:11:59,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:11:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:11:59,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:11:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:11:59,941 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:11:59,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [158817946] [2021-10-15 20:11:59,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [158817946] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:11:59,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:11:59,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-15 20:11:59,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830019912] [2021-10-15 20:11:59,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-15 20:11:59,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:11:59,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-15 20:11:59,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-15 20:11:59,945 INFO L87 Difference]: Start difference. First operand 145 states and 167 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:12:00,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:12:00,366 INFO L93 Difference]: Finished difference Result 170 states and 188 transitions. [2021-10-15 20:12:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-15 20:12:00,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-10-15 20:12:00,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:12:00,370 INFO L225 Difference]: With dead ends: 170 [2021-10-15 20:12:00,370 INFO L226 Difference]: Without dead ends: 170 [2021-10-15 20:12:00,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-15 20:12:00,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-15 20:12:00,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 145. [2021-10-15 20:12:00,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 119 states have (on average 1.3697478991596639) internal successors, (163), 141 states have internal predecessors, (163), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:12:00,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 166 transitions. [2021-10-15 20:12:00,377 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 166 transitions. Word has length 26 [2021-10-15 20:12:00,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:12:00,378 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 166 transitions. [2021-10-15 20:12:00,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:12:00,378 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 166 transitions. [2021-10-15 20:12:00,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-15 20:12:00,379 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:12:00,379 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:12:00,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-15 20:12:00,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:12:00,595 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr42REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:12:00,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:12:00,595 INFO L82 PathProgramCache]: Analyzing trace with hash 957496094, now seen corresponding path program 1 times [2021-10-15 20:12:00,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:12:00,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1555013530] [2021-10-15 20:12:00,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:12:00,596 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:12:00,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:12:00,598 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:12:00,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-15 20:12:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:12:00,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-15 20:12:00,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:12:01,119 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 [2021-10-15 20:12:01,194 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-10-15 20:12:01,195 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 25 treesize of output 13 [2021-10-15 20:12:01,257 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 19 treesize of output 7 [2021-10-15 20:12:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:01,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:12:01,388 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 83 treesize of output 77 [2021-10-15 20:12:01,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:01,523 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:12:01,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1555013530] [2021-10-15 20:12:01,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1555013530] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:12:01,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:12:01,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-10-15 20:12:01,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158701388] [2021-10-15 20:12:01,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-15 20:12:01,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:12:01,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-15 20:12:01,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-15 20:12:01,526 INFO L87 Difference]: Start difference. First operand 145 states and 166 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:12:02,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:12:02,698 INFO L93 Difference]: Finished difference Result 193 states and 213 transitions. [2021-10-15 20:12:02,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-15 20:12:02,699 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2021-10-15 20:12:02,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:12:02,701 INFO L225 Difference]: With dead ends: 193 [2021-10-15 20:12:02,701 INFO L226 Difference]: Without dead ends: 193 [2021-10-15 20:12:02,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 144.5ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-10-15 20:12:02,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-10-15 20:12:02,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 150. [2021-10-15 20:12:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 124 states have (on average 1.3548387096774193) internal successors, (168), 146 states have internal predecessors, (168), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:12:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 171 transitions. [2021-10-15 20:12:02,707 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 171 transitions. Word has length 27 [2021-10-15 20:12:02,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:12:02,708 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 171 transitions. [2021-10-15 20:12:02,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:12:02,708 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 171 transitions. [2021-10-15 20:12:02,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-15 20:12:02,709 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:12:02,709 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-15 20:12:02,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-15 20:12:02,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:12:02,910 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:12:02,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:12:02,910 INFO L82 PathProgramCache]: Analyzing trace with hash -384022952, now seen corresponding path program 1 times [2021-10-15 20:12:02,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:12:02,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435257599] [2021-10-15 20:12:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:12:02,911 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:12:02,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:12:02,913 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:12:02,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-15 20:12:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:12:03,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-15 20:12:03,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:12:03,503 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 [2021-10-15 20:12:03,512 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 [2021-10-15 20:12:03,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:12:03,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:12:03,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-15 20:12:03,849 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 18 treesize of output 10 [2021-10-15 20:12:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:03,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:12:04,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-10-15 20:12:04,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:04,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:04,274 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 8 treesize of output 4 [2021-10-15 20:12:04,281 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 8 treesize of output 4 [2021-10-15 20:12:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:04,318 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:12:04,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435257599] [2021-10-15 20:12:04,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435257599] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-15 20:12:04,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:12:04,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 12 [2021-10-15 20:12:04,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477313970] [2021-10-15 20:12:04,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-15 20:12:04,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-15 20:12:04,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-15 20:12:04,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-15 20:12:04,321 INFO L87 Difference]: Start difference. First operand 150 states and 171 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:12:06,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-15 20:12:06,022 INFO L93 Difference]: Finished difference Result 188 states and 207 transitions. [2021-10-15 20:12:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-15 20:12:06,023 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-10-15 20:12:06,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-15 20:12:06,025 INFO L225 Difference]: With dead ends: 188 [2021-10-15 20:12:06,025 INFO L226 Difference]: Without dead ends: 188 [2021-10-15 20:12:06,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 417.1ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-10-15 20:12:06,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-10-15 20:12:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 156. [2021-10-15 20:12:06,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 130 states have (on average 1.3384615384615384) internal successors, (174), 152 states have internal predecessors, (174), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:12:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 177 transitions. [2021-10-15 20:12:06,032 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 177 transitions. Word has length 28 [2021-10-15 20:12:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-15 20:12:06,032 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 177 transitions. [2021-10-15 20:12:06,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-15 20:12:06,033 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 177 transitions. [2021-10-15 20:12:06,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-15 20:12:06,034 INFO L504 BasicCegarLoop]: Found error trace [2021-10-15 20:12:06,034 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-15 20:12:06,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-15 20:12:06,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 [2021-10-15 20:12:06,250 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr48REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 54 more)] === [2021-10-15 20:12:06,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-15 20:12:06,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1881186989, now seen corresponding path program 1 times [2021-10-15 20:12:06,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-15 20:12:06,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1467413405] [2021-10-15 20:12:06,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:12:06,251 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-15 20:12:06,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat [2021-10-15 20:12:06,252 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-15 20:12:06,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-15 20:12:06,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:12:06,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-15 20:12:06,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:12:06,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-15 20:12:06,758 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 [2021-10-15 20:12:06,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:12:06,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-15 20:12:06,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:06,878 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 21 treesize of output 20 [2021-10-15 20:12:06,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:06,904 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 21 treesize of output 20 [2021-10-15 20:12:06,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:06,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:07,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:07,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-15 20:12:07,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:07,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:07,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:07,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-15 20:12:07,165 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-15 20:12:07,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-15 20:12:07,195 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-15 20:12:07,195 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 17 treesize of output 17 [2021-10-15 20:12:07,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:07,293 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 36 treesize of output 23 [2021-10-15 20:12:07,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-15 20:12:07,312 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 36 treesize of output 23 [2021-10-15 20:12:07,395 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-10-15 20:12:07,396 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 3 case distinctions, treesize of input 60 treesize of output 62 [2021-10-15 20:12:07,430 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-10-15 20:12:07,430 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 3 case distinctions, treesize of input 73 treesize of output 75 [2021-10-15 20:12:07,621 INFO L354 Elim1Store]: treesize reduction 100, result has 18.0 percent of original size [2021-10-15 20:12:07,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 95 treesize of output 83 [2021-10-15 20:12:07,675 INFO L354 Elim1Store]: treesize reduction 132, result has 18.5 percent of original size [2021-10-15 20:12:07,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 96 [2021-10-15 20:12:09,261 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-10-15 20:12:09,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 141 treesize of output 89 [2021-10-15 20:12:09,300 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-10-15 20:12:09,300 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 55 [2021-10-15 20:12:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-15 20:12:09,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-15 20:13:47,991 INFO L354 Elim1Store]: treesize reduction 171, result has 24.0 percent of original size [2021-10-15 20:13:47,992 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 611591 treesize of output 369631 [2021-10-15 20:14:01,358 WARN L207 SmtUtils]: Spent 13.37 s on a formula simplification. DAG size of input: 550 DAG size of output: 515 [2021-10-15 20:14:01,423 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 12224837 treesize of output 12138821 [2021-10-15 20:21:32,716 WARN L207 SmtUtils]: Spent 7.52 m on a formula simplification. DAG size of input: 2586 DAG size of output: 2543 [2021-10-15 20:21:33,019 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-10-15 20:21:33,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 7889189 treesize of output 7339811 [2021-10-15 20:21:46,824 WARN L207 SmtUtils]: Spent 13.80 s on a formula simplification that was a NOOP. DAG size: 2548 [2021-10-15 20:21:47,257 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-15 20:21:47,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1467413405] [2021-10-15 20:21:47,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-10-15 20:21:47,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1190270617] [2021-10-15 20:21:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:21:47,259 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-15 20:21:47,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/cvc4 [2021-10-15 20:21:47,261 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-15 20:21:47,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-10-15 20:21:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:21:48,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-15 20:21:48,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:21:48,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6ad7734 [2021-10-15 20:21:48,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617770373] [2021-10-15 20:21:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-15 20:21:48,126 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-15 20:21:48,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 [2021-10-15 20:21:48,127 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-15 20:21:48,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-15 20:21:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-15 20:21:48,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-15 20:21:48,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-15 20:21:48,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@6ad7734 [2021-10-15 20:21:48,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-15 20:21:48,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-15 20:21:48,612 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-15 20:21:48,612 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-15 20:21:48,618 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr48REQUIRES_VIOLATION [2021-10-15 20:21:48,620 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-15 20:21:48,620 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-15 20:21:48,620 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-15 20:21:48,621 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-15 20:21:48,621 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-15 20:21:48,621 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-15 20:21:48,621 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-10-15 20:21:48,621 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-15 20:21:48,622 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-15 20:21:48,622 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-10-15 20:21:48,622 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-10-15 20:21:48,622 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-10-15 20:21:48,622 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-10-15 20:21:48,623 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-10-15 20:21:48,623 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-10-15 20:21:48,623 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-10-15 20:21:48,623 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-10-15 20:21:48,623 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-10-15 20:21:48,624 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-10-15 20:21:48,624 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-10-15 20:21:48,624 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-10-15 20:21:48,624 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-10-15 20:21:48,624 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-10-15 20:21:48,625 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-10-15 20:21:48,625 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-10-15 20:21:48,625 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-10-15 20:21:48,625 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-10-15 20:21:48,625 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-10-15 20:21:48,625 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-10-15 20:21:48,626 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-10-15 20:21:48,626 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-10-15 20:21:48,626 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION [2021-10-15 20:21:48,626 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION [2021-10-15 20:21:48,626 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-10-15 20:21:48,627 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-10-15 20:21:48,627 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION [2021-10-15 20:21:48,627 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION [2021-10-15 20:21:48,627 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION [2021-10-15 20:21:48,627 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-10-15 20:21:48,627 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-10-15 20:21:48,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40REQUIRES_VIOLATION [2021-10-15 20:21:48,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41REQUIRES_VIOLATION [2021-10-15 20:21:48,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42REQUIRES_VIOLATION [2021-10-15 20:21:48,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43REQUIRES_VIOLATION [2021-10-15 20:21:48,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr44REQUIRES_VIOLATION [2021-10-15 20:21:48,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr45REQUIRES_VIOLATION [2021-10-15 20:21:48,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr46REQUIRES_VIOLATION [2021-10-15 20:21:48,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr47REQUIRES_VIOLATION [2021-10-15 20:21:48,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr49REQUIRES_VIOLATION [2021-10-15 20:21:48,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr50ASSERT_VIOLATIONMEMORY_LEAK [2021-10-15 20:21:48,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr51REQUIRES_VIOLATION [2021-10-15 20:21:48,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr52REQUIRES_VIOLATION [2021-10-15 20:21:48,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr53REQUIRES_VIOLATION [2021-10-15 20:21:48,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr54REQUIRES_VIOLATION [2021-10-15 20:21:48,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr55ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 20:21:48,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr56ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 20:21:48,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr57ASSERT_VIOLATIONMEMORY_FREE [2021-10-15 20:21:48,630 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr58ENSURES_VIOLATIONMEMORY_LEAK [2021-10-15 20:21:48,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-15 20:21:48,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-15 20:21:49,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-10-15 20:21:49,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/cvc4 --incremental --print-success --lang smt [2021-10-15 20:21:49,240 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-15 20:21:49,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 08:21:49 BoogieIcfgContainer [2021-10-15 20:21:49,261 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-15 20:21:49,262 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-15 20:21:49,262 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-15 20:21:49,262 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-15 20:21:49,263 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 08:09:56" (3/4) ... [2021-10-15 20:21:49,266 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-15 20:21:49,266 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-15 20:21:49,267 INFO L168 Benchmark]: Toolchain (without parser) took 714366.83 ms. Allocated memory was 62.9 MB in the beginning and 799.0 MB in the end (delta: 736.1 MB). Free memory was 41.9 MB in the beginning and 350.1 MB in the end (delta: -308.3 MB). Peak memory consumption was 427.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:21:49,268 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 62.9 MB. Free memory was 43.7 MB in the beginning and 43.7 MB in the end (delta: 64.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:21:49,268 INFO L168 Benchmark]: CACSL2BoogieTranslator took 589.97 ms. Allocated memory is still 62.9 MB. Free memory was 41.7 MB in the beginning and 40.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-15 20:21:49,268 INFO L168 Benchmark]: Boogie Preprocessor took 135.08 ms. Allocated memory is still 62.9 MB. Free memory was 40.0 MB in the beginning and 36.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-15 20:21:49,269 INFO L168 Benchmark]: RCFGBuilder took 1220.27 ms. Allocated memory was 62.9 MB in the beginning and 86.0 MB in the end (delta: 23.1 MB). Free memory was 36.7 MB in the beginning and 50.7 MB in the end (delta: -14.0 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. [2021-10-15 20:21:49,269 INFO L168 Benchmark]: TraceAbstraction took 712407.31 ms. Allocated memory was 86.0 MB in the beginning and 799.0 MB in the end (delta: 713.0 MB). Free memory was 49.9 MB in the beginning and 350.1 MB in the end (delta: -300.2 MB). Peak memory consumption was 412.5 MB. Max. memory is 16.1 GB. [2021-10-15 20:21:49,269 INFO L168 Benchmark]: Witness Printer took 4.53 ms. Allocated memory is still 799.0 MB. Free memory is still 350.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-15 20:21:49,272 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 62.9 MB. Free memory was 43.7 MB in the beginning and 43.7 MB in the end (delta: 64.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 589.97 ms. Allocated memory is still 62.9 MB. Free memory was 41.7 MB in the beginning and 40.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 135.08 ms. Allocated memory is still 62.9 MB. Free memory was 40.0 MB in the beginning and 36.7 MB in the end (delta: 3.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1220.27 ms. Allocated memory was 62.9 MB in the beginning and 86.0 MB in the end (delta: 23.1 MB). Free memory was 36.7 MB in the beginning and 50.7 MB in the end (delta: -14.0 MB). Peak memory consumption was 19.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 712407.31 ms. Allocated memory was 86.0 MB in the beginning and 799.0 MB in the end (delta: 713.0 MB). Free memory was 49.9 MB in the beginning and 350.1 MB in the end (delta: -300.2 MB). Peak memory consumption was 412.5 MB. Max. memory is 16.1 GB. * Witness Printer took 4.53 ms. Allocated memory is still 799.0 MB. Free memory is still 350.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 1061]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L1000] SLL* head = malloc(sizeof(SLL)); [L1001] head->next = ((void*)0) [L1002] head->prev = ((void*)0) [L1003] head->data = 0 [L1005] SLL* x = head; [L1008] COND FALSE !(__VERIFIER_nondet_int()) [L1019] COND TRUE __VERIFIER_nondet_int() [L1020] x = malloc(sizeof(SLL)) [L1021] x->data = 1 [L1022] x->next = head [L1023] x->prev = ((void*)0) [L1024] head = x [L1049] x = head [L1052] EXPR x->data [L1052] COND FALSE !(x->data != 1) [L1058] EXPR x->next [L1058] x = x->next [L1059] COND TRUE \read(*x) [L1061] EXPR x->data [L1061] COND FALSE !(x->data == 1) [L1063] EXPR x->next [L1063] x = x->next [L1059] COND TRUE \read(*x) [L1061] x->data - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1002]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1002]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1003]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1011]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1012]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1013]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1013]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1014]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1014]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1015]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1023]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1030]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1033]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1037]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1037]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1038]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1039]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1039]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1040]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1040]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1043]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1044]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1052]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1054]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1054]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1058]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1061]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1062]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1063]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1071]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1071]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1072]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1072]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1072]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 997]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 135 locations, 59 error locations. Started 1 CEGAR loops. OverallTime: 712312.4ms, OverallIterations: 18, TraceHistogramMax: 2, EmptinessCheckTime: 40.3ms, AutomataDifference: 83216.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1163 SDtfs, 2478 SDslu, 2913 SDs, 0 SdLazy, 5070 SolverSat, 543 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 28717.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 708 GetRequests, 452 SyntacticMatches, 53 SemanticMatches, 203 ConstructedPredicates, 3 IntricatePredicates, 2 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 80233.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=156occurred in iteration=17, InterpolantAutomatonStates: 163, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 189.3ms AutomataMinimizationTime, 17 MinimizatonAttempts, 524 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 181.6ms SsaConstructionTime, 1273.5ms SatisfiabilityAnalysisTime, 37313.9ms InterpolantComputationTime, 320 NumberOfCodeBlocks, 320 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 606 ConstructedInterpolants, 46 QuantifiedInterpolants, 5824 SizeOfPredicates, 116 NumberOfNonLiveVariables, 1897 ConjunctsInSsa, 163 ConjunctsInUnsatCore, 34 InterpolantComputations, 34 PerfectInterpolantSequences, 6/6 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-15 20:21:49,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75f5c7fe-35d5-4bc4-a374-13e5019171d7/bin/uautomizer-hJ6jxDFKc3/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...