./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 22:47:22,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 22:47:22,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 22:47:22,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 22:47:22,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 22:47:22,478 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 22:47:22,480 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 22:47:22,482 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 22:47:22,484 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 22:47:22,486 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 22:47:22,487 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 22:47:22,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 22:47:22,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 22:47:22,490 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 22:47:22,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 22:47:22,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 22:47:22,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 22:47:22,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 22:47:22,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 22:47:22,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 22:47:22,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 22:47:22,528 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 22:47:22,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 22:47:22,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 22:47:22,536 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 22:47:22,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 22:47:22,541 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 22:47:22,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 22:47:22,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 22:47:22,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 22:47:22,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 22:47:22,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 22:47:22,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 22:47:22,556 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 22:47:22,559 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 22:47:22,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 22:47:22,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 22:47:22,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 22:47:22,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 22:47:22,561 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 22:47:22,562 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 22:47:22,562 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 22:47:22,608 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 22:47:22,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 22:47:22,609 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 22:47:22,609 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 22:47:22,617 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 22:47:22,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 22:47:22,618 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 22:47:22,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 22:47:22,618 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 22:47:22,619 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 22:47:22,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 22:47:22,620 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 22:47:22,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 22:47:22,621 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 22:47:22,621 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 22:47:22,621 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 22:47:22,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 22:47:22,622 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 22:47:22,622 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 22:47:22,622 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 22:47:22,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 22:47:22,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 22:47:22,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 22:47:22,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:47:22,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 22:47:22,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 22:47:22,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 22:47:22,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 22:47:22,624 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 22:47:22,626 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_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ef2b56a2f4ebf2e6f7f4ededf8760f087ff726b08e36644d8dcb52a8d087cd1 [2021-10-28 22:47:22,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 22:47:22,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 22:47:22,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 22:47:22,919 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 22:47:22,920 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 22:47:22,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2021-10-28 22:47:22,983 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/data/0b3d0aef6/695707934d58404a979950220b5c0159/FLAG3ee81c3e1 [2021-10-28 22:47:23,468 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 22:47:23,468 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength6.c [2021-10-28 22:47:23,474 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/data/0b3d0aef6/695707934d58404a979950220b5c0159/FLAG3ee81c3e1 [2021-10-28 22:47:23,873 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/data/0b3d0aef6/695707934d58404a979950220b5c0159 [2021-10-28 22:47:23,882 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 22:47:23,885 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 22:47:23,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 22:47:23,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 22:47:23,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 22:47:23,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:47:23" (1/1) ... [2021-10-28 22:47:23,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e430441 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:47:23, skipping insertion in model container [2021-10-28 22:47:23,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:47:23" (1/1) ... [2021-10-28 22:47:23,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 22:47:23,923 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 22:47:24,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:47:24,065 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 22:47:24,080 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 22:47:24,093 INFO L208 MainTranslator]: Completed translation [2021-10-28 22:47:24,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:47:24 WrapperNode [2021-10-28 22:47:24,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 22:47:24,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 22:47:24,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 22:47:24,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 22:47:24,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:47:24" (1/1) ... [2021-10-28 22:47:24,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:47:24" (1/1) ... [2021-10-28 22:47:24,114 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:47:24" (1/1) ... [2021-10-28 22:47:24,114 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:47:24" (1/1) ... [2021-10-28 22:47:24,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:47:24" (1/1) ... [2021-10-28 22:47:24,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:47:24" (1/1) ... [2021-10-28 22:47:24,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:47:24" (1/1) ... [2021-10-28 22:47:24,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 22:47:24,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 22:47:24,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 22:47:24,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 22:47:24,131 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:47:24" (1/1) ... [2021-10-28 22:47:24,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 22:47:24,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:24,176 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 22:47:24,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 22:47:24,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 22:47:24,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 22:47:24,224 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-10-28 22:47:24,224 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 22:47:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-10-28 22:47:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 22:47:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 22:47:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 22:47:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 22:47:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 22:47:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 22:47:24,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 22:47:24,485 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 22:47:24,485 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-28 22:47:24,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:47:24 BoogieIcfgContainer [2021-10-28 22:47:24,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 22:47:24,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 22:47:24,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 22:47:24,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 22:47:24,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:47:23" (1/3) ... [2021-10-28 22:47:24,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b1986cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:47:24, skipping insertion in model container [2021-10-28 22:47:24,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:47:24" (2/3) ... [2021-10-28 22:47:24,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b1986cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:47:24, skipping insertion in model container [2021-10-28 22:47:24,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:47:24" (3/3) ... [2021-10-28 22:47:24,497 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength6.c [2021-10-28 22:47:24,502 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 22:47:24,503 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-10-28 22:47:24,546 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 22:47:24,553 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 22:47:24,553 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-28 22:47:24,594 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 22:47:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 22:47:24,602 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:24,603 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:24,604 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:24,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:24,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2021-10-28 22:47:24,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:24,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541048191] [2021-10-28 22:47:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:24,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:24,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:47:24,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:24,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541048191] [2021-10-28 22:47:24,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541048191] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:47:24,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:47:24,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 22:47:24,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383711945] [2021-10-28 22:47:24,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:47:24,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:24,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:47:24,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:47:24,961 INFO L87 Difference]: Start difference. First operand has 40 states, 25 states have (on average 1.6) internal successors, (40), 33 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-10-28 22:47:25,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:25,166 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-10-28 22:47:25,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:47:25,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 10 [2021-10-28 22:47:25,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:25,179 INFO L225 Difference]: With dead ends: 58 [2021-10-28 22:47:25,179 INFO L226 Difference]: Without dead ends: 54 [2021-10-28 22:47:25,182 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:47:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-28 22:47:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-10-28 22:47:25,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 33 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-10-28 22:47:25,228 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2021-10-28 22:47:25,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:25,228 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-10-28 22:47:25,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2021-10-28 22:47:25,229 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-10-28 22:47:25,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-28 22:47:25,230 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:25,230 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:25,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 22:47:25,231 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:25,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:25,233 INFO L85 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2021-10-28 22:47:25,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:25,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800773684] [2021-10-28 22:47:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:25,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:25,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:25,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:25,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:47:25,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:25,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800773684] [2021-10-28 22:47:25,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800773684] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:47:25,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:47:25,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 22:47:25,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590247661] [2021-10-28 22:47:25,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:47:25,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:25,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:47:25,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 22:47:25,360 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:47:25,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:25,467 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-10-28 22:47:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:47:25,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-10-28 22:47:25,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:25,471 INFO L225 Difference]: With dead ends: 49 [2021-10-28 22:47:25,472 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 22:47:25,473 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:47:25,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 22:47:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2021-10-28 22:47:25,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 35 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:25,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-10-28 22:47:25,488 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2021-10-28 22:47:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:25,489 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-10-28 22:47:25,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:47:25,490 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-10-28 22:47:25,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 22:47:25,492 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:25,493 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:25,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 22:47:25,495 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting fooErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:25,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:25,497 INFO L85 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2021-10-28 22:47:25,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:25,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383027082] [2021-10-28 22:47:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:25,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:25,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:47:25,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:25,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383027082] [2021-10-28 22:47:25,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383027082] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:47:25,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:47:25,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:47:25,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994467103] [2021-10-28 22:47:25,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:47:25,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:25,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:47:25,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:47:25,621 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:47:25,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:25,753 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-10-28 22:47:25,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:47:25,754 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 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 12 [2021-10-28 22:47:25,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:25,755 INFO L225 Difference]: With dead ends: 40 [2021-10-28 22:47:25,755 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 22:47:25,755 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:47:25,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 22:47:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-28 22:47:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 34 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-10-28 22:47:25,771 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2021-10-28 22:47:25,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:25,771 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-10-28 22:47:25,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:47:25,772 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-10-28 22:47:25,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 22:47:25,772 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:25,772 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:25,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 22:47:25,773 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:25,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:25,777 INFO L85 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2021-10-28 22:47:25,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:25,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450008468] [2021-10-28 22:47:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:25,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:25,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:47:25,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:25,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450008468] [2021-10-28 22:47:25,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450008468] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:47:25,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:47:25,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 22:47:25,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272462072] [2021-10-28 22:47:25,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:47:25,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:25,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:47:25,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:47:25,941 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:47:26,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:26,110 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-10-28 22:47:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 22:47:26,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 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 12 [2021-10-28 22:47:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:26,112 INFO L225 Difference]: With dead ends: 46 [2021-10-28 22:47:26,112 INFO L226 Difference]: Without dead ends: 46 [2021-10-28 22:47:26,113 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:47:26,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-28 22:47:26,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-10-28 22:47:26,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 35 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-10-28 22:47:26,120 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2021-10-28 22:47:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:26,121 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-10-28 22:47:26,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:47:26,122 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-10-28 22:47:26,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-28 22:47:26,122 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:26,123 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:26,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 22:47:26,124 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:26,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:26,125 INFO L85 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2021-10-28 22:47:26,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:26,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120710565] [2021-10-28 22:47:26,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:26,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:26,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:26,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:26,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:47:26,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:26,238 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120710565] [2021-10-28 22:47:26,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120710565] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:47:26,238 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:47:26,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 22:47:26,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740127729] [2021-10-28 22:47:26,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:47:26,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:26,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:47:26,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:47:26,240 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 22:47:26,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:26,366 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-10-28 22:47:26,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:47:26,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 15 [2021-10-28 22:47:26,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:26,368 INFO L225 Difference]: With dead ends: 46 [2021-10-28 22:47:26,368 INFO L226 Difference]: Without dead ends: 43 [2021-10-28 22:47:26,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:47:26,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-28 22:47:26,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-10-28 22:47:26,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 35 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:26,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-10-28 22:47:26,373 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2021-10-28 22:47:26,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:26,373 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-10-28 22:47:26,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-10-28 22:47:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-10-28 22:47:26,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 22:47:26,375 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:26,375 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:26,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 22:47:26,375 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:26,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2021-10-28 22:47:26,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:26,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457975958] [2021-10-28 22:47:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:26,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:26,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:47:26,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:26,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457975958] [2021-10-28 22:47:26,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457975958] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:26,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538305736] [2021-10-28 22:47:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:26,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:26,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:26,458 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:26,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 22:47:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:26,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:47:26,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:47:26,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538305736] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:26,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:47:26,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-10-28 22:47:26,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991321610] [2021-10-28 22:47:26,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:47:26,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:26,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:47:26,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 22:47:26,607 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:47:26,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:26,742 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-10-28 22:47:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:47:26,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-10-28 22:47:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:26,745 INFO L225 Difference]: With dead ends: 52 [2021-10-28 22:47:26,745 INFO L226 Difference]: Without dead ends: 52 [2021-10-28 22:47:26,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-28 22:47:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-28 22:47:26,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-10-28 22:47:26,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 39 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:26,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-10-28 22:47:26,753 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2021-10-28 22:47:26,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:26,753 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-10-28 22:47:26,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:47:26,753 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-10-28 22:47:26,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-28 22:47:26,754 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:26,754 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:26,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 22:47:26,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-28 22:47:26,971 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:26,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:26,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1213405753, now seen corresponding path program 1 times [2021-10-28 22:47:26,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:26,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536216659] [2021-10-28 22:47:26,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:26,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:26,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:27,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 22:47:27,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:27,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536216659] [2021-10-28 22:47:27,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536216659] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:47:27,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 22:47:27,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 22:47:27,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293512468] [2021-10-28 22:47:27,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 22:47:27,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:27,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 22:47:27,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-10-28 22:47:27,073 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:47:27,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:27,235 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-10-28 22:47:27,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:47:27,235 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 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 17 [2021-10-28 22:47:27,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:27,237 INFO L225 Difference]: With dead ends: 44 [2021-10-28 22:47:27,237 INFO L226 Difference]: Without dead ends: 44 [2021-10-28 22:47:27,237 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:47:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-28 22:47:27,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-28 22:47:27,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.303030303030303) internal successors, (43), 38 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:27,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-10-28 22:47:27,257 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2021-10-28 22:47:27,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:27,257 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-10-28 22:47:27,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:47:27,258 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-10-28 22:47:27,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-28 22:47:27,258 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:27,259 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:27,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 22:47:27,259 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:27,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:27,261 INFO L85 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2021-10-28 22:47:27,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:27,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157980413] [2021-10-28 22:47:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:27,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:27,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:27,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:47:27,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:27,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157980413] [2021-10-28 22:47:27,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157980413] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:27,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885548597] [2021-10-28 22:47:27,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:27,403 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:27,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:27,407 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:27,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 22:47:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:27,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 22:47:27,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:47:27,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885548597] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:27,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:47:27,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-10-28 22:47:27,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261763338] [2021-10-28 22:47:27,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-28 22:47:27,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:27,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-28 22:47:27,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:47:27,616 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:47:27,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:27,811 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-10-28 22:47:27,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:47:27,814 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2021-10-28 22:47:27,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:27,815 INFO L225 Difference]: With dead ends: 50 [2021-10-28 22:47:27,815 INFO L226 Difference]: Without dead ends: 47 [2021-10-28 22:47:27,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-28 22:47:27,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-28 22:47:27,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-10-28 22:47:27,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 38 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:27,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-10-28 22:47:27,819 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 20 [2021-10-28 22:47:27,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:27,819 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-10-28 22:47:27,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 1 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:47:27,819 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-10-28 22:47:27,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 22:47:27,820 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:27,820 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:27,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 22:47:28,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:28,021 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:28,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:28,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1483602424, now seen corresponding path program 2 times [2021-10-28 22:47:28,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:28,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627942110] [2021-10-28 22:47:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:28,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:28,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:47:28,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:28,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627942110] [2021-10-28 22:47:28,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627942110] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:28,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648666230] [2021-10-28 22:47:28,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:47:28,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:28,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:28,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:28,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 22:47:28,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:47:28,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:47:28,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 22:47:28,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-28 22:47:28,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648666230] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:28,322 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:47:28,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-28 22:47:28,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853592727] [2021-10-28 22:47:28,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:47:28,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:28,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:47:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:47:28,324 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:47:28,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:28,539 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-10-28 22:47:28,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:47:28,540 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-10-28 22:47:28,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:28,541 INFO L225 Difference]: With dead ends: 58 [2021-10-28 22:47:28,541 INFO L226 Difference]: Without dead ends: 58 [2021-10-28 22:47:28,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-10-28 22:47:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-28 22:47:28,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2021-10-28 22:47:28,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.25) internal successors, (40), 36 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:28,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-10-28 22:47:28,545 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 21 [2021-10-28 22:47:28,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:28,545 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-10-28 22:47:28,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 22:47:28,546 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-10-28 22:47:28,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 22:47:28,546 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:28,546 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:28,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 22:47:28,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:28,759 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:28,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:28,759 INFO L85 PathProgramCache]: Analyzing trace with hash -523456178, now seen corresponding path program 2 times [2021-10-28 22:47:28,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:28,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299786546] [2021-10-28 22:47:28,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:28,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:28,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:28,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:47:28,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:28,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299786546] [2021-10-28 22:47:28,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299786546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:28,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868768159] [2021-10-28 22:47:28,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:47:28,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:28,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:28,871 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:28,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 22:47:28,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-28 22:47:28,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:47:28,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 22:47:28,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:28,990 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:47:28,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2021-10-28 22:47:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-28 22:47:29,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868768159] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:47:29,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:47:29,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2021-10-28 22:47:29,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793462655] [2021-10-28 22:47:29,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:47:29,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:29,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:47:29,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:47:29,120 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:29,137 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-10-28 22:47:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:47:29,138 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-10-28 22:47:29,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:29,139 INFO L225 Difference]: With dead ends: 40 [2021-10-28 22:47:29,139 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 22:47:29,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:47:29,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 22:47:29,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-28 22:47:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.1875) internal successors, (38), 34 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-10-28 22:47:29,142 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 25 [2021-10-28 22:47:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:29,142 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-10-28 22:47:29,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-10-28 22:47:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-28 22:47:29,143 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:29,143 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:29,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-28 22:47:29,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-28 22:47:29,359 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:29,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:29,359 INFO L85 PathProgramCache]: Analyzing trace with hash -523456177, now seen corresponding path program 1 times [2021-10-28 22:47:29,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:29,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312491258] [2021-10-28 22:47:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:29,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:29,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:29,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:47:29,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:29,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312491258] [2021-10-28 22:47:29,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312491258] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:29,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829724951] [2021-10-28 22:47:29,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:29,464 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:29,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:29,465 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:29,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 22:47:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:29,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 22:47:29,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:47:29,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829724951] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:29,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:47:29,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-10-28 22:47:29,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467589012] [2021-10-28 22:47:29,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-28 22:47:29,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:29,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 22:47:29,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-28 22:47:29,718 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:47:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:29,923 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-10-28 22:47:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:47:29,924 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2021-10-28 22:47:29,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:29,924 INFO L225 Difference]: With dead ends: 52 [2021-10-28 22:47:29,924 INFO L226 Difference]: Without dead ends: 49 [2021-10-28 22:47:29,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:47:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-28 22:47:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-10-28 22:47:29,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.162162162162162) internal successors, (43), 39 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:29,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-10-28 22:47:29,928 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 25 [2021-10-28 22:47:29,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:29,928 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-10-28 22:47:29,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-10-28 22:47:29,928 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-10-28 22:47:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 22:47:29,929 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:29,929 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:29,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-28 22:47:30,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-28 22:47:30,130 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:30,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:30,131 INFO L85 PathProgramCache]: Analyzing trace with hash -661735506, now seen corresponding path program 2 times [2021-10-28 22:47:30,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:30,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534394023] [2021-10-28 22:47:30,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:30,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:30,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:30,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:30,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:30,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:47:30,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:30,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534394023] [2021-10-28 22:47:30,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534394023] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:30,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917034319] [2021-10-28 22:47:30,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:47:30,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:30,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:30,281 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:30,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-28 22:47:30,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-28 22:47:30,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:47:30,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 22:47:30,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:30,411 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:47:30,412 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 22:47:30,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-10-28 22:47:30,837 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-28 22:47:30,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917034319] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:47:30,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:47:30,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-10-28 22:47:30,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670082052] [2021-10-28 22:47:30,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 22:47:30,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:30,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 22:47:30,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:47:30,840 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:30,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:30,881 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-10-28 22:47:30,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 22:47:30,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2021-10-28 22:47:30,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:30,886 INFO L225 Difference]: With dead ends: 50 [2021-10-28 22:47:30,887 INFO L226 Difference]: Without dead ends: 50 [2021-10-28 22:47:30,887 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:47:30,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-28 22:47:30,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-10-28 22:47:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 22:47:30,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-10-28 22:47:30,898 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 30 [2021-10-28 22:47:30,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:30,898 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-10-28 22:47:30,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-10-28 22:47:30,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-28 22:47:30,907 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:30,908 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:30,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-28 22:47:31,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:31,109 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:31,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:31,109 INFO L85 PathProgramCache]: Analyzing trace with hash 494772831, now seen corresponding path program 1 times [2021-10-28 22:47:31,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:31,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169067759] [2021-10-28 22:47:31,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:31,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:31,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:31,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:31,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:31,160 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-28 22:47:31,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:31,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169067759] [2021-10-28 22:47:31,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169067759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:31,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961001354] [2021-10-28 22:47:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:31,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:31,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:31,178 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:31,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-28 22:47:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:31,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 22:47:31,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:31,539 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 22:47:31,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961001354] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:31,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:47:31,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2021-10-28 22:47:31,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803323816] [2021-10-28 22:47:31,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-28 22:47:31,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:31,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 22:47:31,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-28 22:47:31,544 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 22:47:31,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:31,782 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2021-10-28 22:47:31,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:47:31,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-10-28 22:47:31,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:31,784 INFO L225 Difference]: With dead ends: 84 [2021-10-28 22:47:31,785 INFO L226 Difference]: Without dead ends: 81 [2021-10-28 22:47:31,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:47:31,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-28 22:47:31,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2021-10-28 22:47:31,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 53 states have internal predecessors, (59), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 22:47:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-10-28 22:47:31,799 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 36 [2021-10-28 22:47:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:31,800 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-10-28 22:47:31,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-10-28 22:47:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-10-28 22:47:31,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-28 22:47:31,806 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:31,806 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:31,831 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-28 22:47:32,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:32,007 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:32,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:32,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1980281553, now seen corresponding path program 1 times [2021-10-28 22:47:32,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:32,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85741347] [2021-10-28 22:47:32,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:32,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:32,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:32,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:32,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:32,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:32,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-10-28 22:47:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-28 22:47:32,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:32,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85741347] [2021-10-28 22:47:32,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85741347] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:32,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738551063] [2021-10-28 22:47:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:32,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:32,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:32,193 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:32,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-28 22:47:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:32,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 22:47:32,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-28 22:47:32,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738551063] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:32,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:47:32,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-28 22:47:32,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723668498] [2021-10-28 22:47:32,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-28 22:47:32,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:32,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 22:47:32,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-28 22:47:32,688 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 14 states have internal predecessors, (77), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:47:33,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:33,017 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2021-10-28 22:47:33,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 22:47:33,018 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 14 states have internal predecessors, (77), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2021-10-28 22:47:33,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:33,019 INFO L225 Difference]: With dead ends: 72 [2021-10-28 22:47:33,019 INFO L226 Difference]: Without dead ends: 69 [2021-10-28 22:47:33,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-10-28 22:47:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-28 22:47:33,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2021-10-28 22:47:33,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 58 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 22:47:33,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-10-28 22:47:33,023 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 66 [2021-10-28 22:47:33,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:33,023 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-10-28 22:47:33,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 14 states have internal predecessors, (77), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:47:33,023 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-10-28 22:47:33,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-28 22:47:33,024 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:33,024 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:33,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-28 22:47:33,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-28 22:47:33,235 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:33,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:33,235 INFO L85 PathProgramCache]: Analyzing trace with hash -453177461, now seen corresponding path program 2 times [2021-10-28 22:47:33,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:33,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920764553] [2021-10-28 22:47:33,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:33,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:33,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:33,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:33,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-10-28 22:47:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:33,495 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 2 proven. 194 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-10-28 22:47:33,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:33,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920764553] [2021-10-28 22:47:33,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920764553] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:33,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359661836] [2021-10-28 22:47:33,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:47:33,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:33,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:33,496 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:33,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-28 22:47:33,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:47:33,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:47:33,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 22:47:33,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 142 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-28 22:47:34,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359661836] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:34,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:47:34,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-28 22:47:34,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465308648] [2021-10-28 22:47:34,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-28 22:47:34,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:34,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-28 22:47:34,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-10-28 22:47:34,075 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 16 states have internal predecessors, (87), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:47:34,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:34,448 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-10-28 22:47:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-28 22:47:34,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 16 states have internal predecessors, (87), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 76 [2021-10-28 22:47:34,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:34,450 INFO L225 Difference]: With dead ends: 77 [2021-10-28 22:47:34,450 INFO L226 Difference]: Without dead ends: 74 [2021-10-28 22:47:34,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-10-28 22:47:34,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-28 22:47:34,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2021-10-28 22:47:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 63 states have internal predecessors, (69), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-10-28 22:47:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-10-28 22:47:34,454 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 76 [2021-10-28 22:47:34,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:34,455 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-10-28 22:47:34,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 16 states have internal predecessors, (87), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:47:34,455 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-10-28 22:47:34,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-28 22:47:34,457 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:34,457 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:34,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-28 22:47:34,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:34,658 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:34,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:34,658 INFO L85 PathProgramCache]: Analyzing trace with hash -197968815, now seen corresponding path program 3 times [2021-10-28 22:47:34,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:34,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96692576] [2021-10-28 22:47:34,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:34,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:34,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:34,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:34,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:34,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-28 22:47:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 277 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-10-28 22:47:34,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:34,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96692576] [2021-10-28 22:47:34,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96692576] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:34,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227978085] [2021-10-28 22:47:34,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:47:34,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:34,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:34,934 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:34,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-28 22:47:35,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 22:47:35,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:47:35,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 22:47:35,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:35,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-28 22:47:35,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-28 22:47:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2021-10-28 22:47:36,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227978085] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:36,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:47:36,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 16 [2021-10-28 22:47:36,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8454268] [2021-10-28 22:47:36,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 22:47:36,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:36,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 22:47:36,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-28 22:47:36,066 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 16 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 22:47:36,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:36,566 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2021-10-28 22:47:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 22:47:36,567 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 86 [2021-10-28 22:47:36,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:36,568 INFO L225 Difference]: With dead ends: 87 [2021-10-28 22:47:36,568 INFO L226 Difference]: Without dead ends: 84 [2021-10-28 22:47:36,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-10-28 22:47:36,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-28 22:47:36,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2021-10-28 22:47:36,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 70 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:47:36,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-10-28 22:47:36,572 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 86 [2021-10-28 22:47:36,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:36,573 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-10-28 22:47:36,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-10-28 22:47:36,573 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-10-28 22:47:36,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-28 22:47:36,574 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:36,574 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:36,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-28 22:47:36,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-28 22:47:36,795 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:36,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1122221700, now seen corresponding path program 2 times [2021-10-28 22:47:36,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:36,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460433738] [2021-10-28 22:47:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:36,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:36,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:36,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:36,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:36,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:36,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-10-28 22:47:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:36,943 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2021-10-28 22:47:36,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:36,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460433738] [2021-10-28 22:47:36,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460433738] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:36,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739975870] [2021-10-28 22:47:36,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:47:36,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:36,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:36,945 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:36,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-28 22:47:37,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-28 22:47:37,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:47:37,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 22:47:37,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:37,232 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:47:37,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 22:47:37,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-10-28 22:47:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-10-28 22:47:38,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739975870] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:47:38,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:47:38,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-10-28 22:47:38,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256672667] [2021-10-28 22:47:38,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 22:47:38,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:38,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 22:47:38,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:47:38,063 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:38,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:38,110 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-10-28 22:47:38,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 22:47:38,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 102 [2021-10-28 22:47:38,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:38,111 INFO L225 Difference]: With dead ends: 79 [2021-10-28 22:47:38,111 INFO L226 Difference]: Without dead ends: 79 [2021-10-28 22:47:38,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-28 22:47:38,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-28 22:47:38,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-10-28 22:47:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 70 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:47:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-10-28 22:47:38,116 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 102 [2021-10-28 22:47:38,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:38,116 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-10-28 22:47:38,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:38,117 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-10-28 22:47:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-28 22:47:38,118 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:38,118 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:38,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-28 22:47:38,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-28 22:47:38,339 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:38,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:38,339 INFO L85 PathProgramCache]: Analyzing trace with hash -81231572, now seen corresponding path program 1 times [2021-10-28 22:47:38,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:38,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104443626] [2021-10-28 22:47:38,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:38,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:38,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:38,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:38,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-10-28 22:47:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:38,633 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 3 proven. 375 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-10-28 22:47:38,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:38,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104443626] [2021-10-28 22:47:38,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104443626] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:38,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090734520] [2021-10-28 22:47:38,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:38,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:38,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:38,640 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:38,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-28 22:47:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:38,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 22:47:39,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 267 proven. 112 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-10-28 22:47:39,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090734520] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:39,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:47:39,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-10-28 22:47:39,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429689016] [2021-10-28 22:47:39,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 22:47:39,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:39,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 22:47:39,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-10-28 22:47:39,504 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 21 states, 21 states have (on average 5.380952380952381) internal successors, (113), 20 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:47:39,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:39,998 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2021-10-28 22:47:39,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 22:47:39,998 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.380952380952381) internal successors, (113), 20 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 105 [2021-10-28 22:47:39,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:39,999 INFO L225 Difference]: With dead ends: 90 [2021-10-28 22:47:39,999 INFO L226 Difference]: Without dead ends: 87 [2021-10-28 22:47:40,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2021-10-28 22:47:40,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-28 22:47:40,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2021-10-28 22:47:40,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 73 states have (on average 1.095890410958904) internal successors, (80), 75 states have internal predecessors, (80), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:47:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-10-28 22:47:40,003 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 105 [2021-10-28 22:47:40,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:40,004 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-10-28 22:47:40,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.380952380952381) internal successors, (113), 20 states have internal predecessors, (113), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:47:40,004 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-10-28 22:47:40,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-28 22:47:40,005 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:40,005 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:40,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-28 22:47:40,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-28 22:47:40,218 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:40,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:40,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1970017626, now seen corresponding path program 2 times [2021-10-28 22:47:40,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:40,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657790522] [2021-10-28 22:47:40,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:40,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:40,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:40,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:40,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:40,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-10-28 22:47:40,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-28 22:47:40,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:40,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657790522] [2021-10-28 22:47:40,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657790522] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:40,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403166625] [2021-10-28 22:47:40,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:47:40,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:40,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:40,537 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:40,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-28 22:47:40,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-28 22:47:40,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:47:40,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 22:47:40,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:40,956 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-28 22:47:40,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-10-28 22:47:41,973 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-28 22:47:41,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 21 [2021-10-28 22:47:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2021-10-28 22:47:42,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403166625] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:47:42,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:47:42,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2021-10-28 22:47:42,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713822130] [2021-10-28 22:47:42,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 22:47:42,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:42,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 22:47:42,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-10-28 22:47:42,905 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:42,993 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-10-28 22:47:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 22:47:42,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 115 [2021-10-28 22:47:42,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:42,995 INFO L225 Difference]: With dead ends: 82 [2021-10-28 22:47:42,995 INFO L226 Difference]: Without dead ends: 79 [2021-10-28 22:47:42,995 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-10-28 22:47:42,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-28 22:47:42,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-10-28 22:47:42,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 68 states have internal predecessors, (71), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:47:42,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-10-28 22:47:42,998 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 115 [2021-10-28 22:47:42,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:42,999 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-10-28 22:47:42,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:42,999 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-10-28 22:47:43,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-10-28 22:47:43,000 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:43,000 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:43,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-28 22:47:43,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:43,201 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:43,201 INFO L85 PathProgramCache]: Analyzing trace with hash -940912475, now seen corresponding path program 1 times [2021-10-28 22:47:43,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:43,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230647195] [2021-10-28 22:47:43,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:43,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:43,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:43,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:43,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-10-28 22:47:43,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:43,518 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-10-28 22:47:43,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:43,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230647195] [2021-10-28 22:47:43,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230647195] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:43,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836677845] [2021-10-28 22:47:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:43,519 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:43,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:43,535 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:43,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-28 22:47:44,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:44,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-28 22:47:44,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 344 proven. 148 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-28 22:47:44,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836677845] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:44,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:47:44,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-10-28 22:47:44,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77923309] [2021-10-28 22:47:44,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-28 22:47:44,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:44,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-28 22:47:44,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-10-28 22:47:44,630 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:47:45,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:45,171 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-10-28 22:47:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 22:47:45,172 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 116 [2021-10-28 22:47:45,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:45,173 INFO L225 Difference]: With dead ends: 88 [2021-10-28 22:47:45,173 INFO L226 Difference]: Without dead ends: 85 [2021-10-28 22:47:45,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2021-10-28 22:47:45,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-28 22:47:45,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2021-10-28 22:47:45,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:47:45,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-10-28 22:47:45,178 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 116 [2021-10-28 22:47:45,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:45,178 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-10-28 22:47:45,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:47:45,179 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-10-28 22:47:45,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-10-28 22:47:45,180 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:45,180 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:45,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-28 22:47:45,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:45,381 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:45,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:45,381 INFO L85 PathProgramCache]: Analyzing trace with hash -431416353, now seen corresponding path program 2 times [2021-10-28 22:47:45,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:45,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185077543] [2021-10-28 22:47:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:45,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:45,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:45,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:45,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-10-28 22:47:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 3 proven. 616 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-10-28 22:47:45,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:45,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185077543] [2021-10-28 22:47:45,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185077543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:45,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659486883] [2021-10-28 22:47:45,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 22:47:45,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:45,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:45,791 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:45,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-28 22:47:46,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 22:47:46,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:47:46,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 22:47:46,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 431 proven. 189 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-10-28 22:47:47,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659486883] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:47,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:47:47,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-10-28 22:47:47,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416910428] [2021-10-28 22:47:47,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-28 22:47:47,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:47,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-28 22:47:47,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-10-28 22:47:47,113 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 25 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:47:47,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:47,677 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2021-10-28 22:47:47,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-28 22:47:47,678 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 126 [2021-10-28 22:47:47,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:47,678 INFO L225 Difference]: With dead ends: 93 [2021-10-28 22:47:47,678 INFO L226 Difference]: Without dead ends: 90 [2021-10-28 22:47:47,679 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2021-10-28 22:47:47,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-28 22:47:47,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-10-28 22:47:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.051948051948052) internal successors, (81), 78 states have internal predecessors, (81), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:47:47,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2021-10-28 22:47:47,683 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 126 [2021-10-28 22:47:47,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:47,684 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2021-10-28 22:47:47,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.32) internal successors, (133), 24 states have internal predecessors, (133), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:47:47,684 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2021-10-28 22:47:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-10-28 22:47:47,686 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:47,686 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:47,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-28 22:47:47,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:47,911 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:47,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:47,911 INFO L85 PathProgramCache]: Analyzing trace with hash -138765787, now seen corresponding path program 3 times [2021-10-28 22:47:47,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:47,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550741503] [2021-10-28 22:47:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:47,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:47,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:47,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:48,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-28 22:47:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:48,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 3 proven. 759 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-10-28 22:47:48,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:48,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550741503] [2021-10-28 22:47:48,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550741503] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:48,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178282891] [2021-10-28 22:47:48,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 22:47:48,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:48,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:48,331 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:48,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-28 22:47:48,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-28 22:47:48,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:47:49,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 22:47:49,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 999 trivial. 0 not checked. [2021-10-28 22:47:49,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178282891] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:49,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:47:49,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 21 [2021-10-28 22:47:49,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287906560] [2021-10-28 22:47:49,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-28 22:47:49,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:49,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-28 22:47:49,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-10-28 22:47:49,542 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 22:47:50,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:50,048 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2021-10-28 22:47:50,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 22:47:50,048 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 136 [2021-10-28 22:47:50,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:50,052 INFO L225 Difference]: With dead ends: 109 [2021-10-28 22:47:50,057 INFO L226 Difference]: Without dead ends: 106 [2021-10-28 22:47:50,058 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-10-28 22:47:50,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-28 22:47:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 95. [2021-10-28 22:47:50,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 87 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:47:50,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-10-28 22:47:50,069 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 136 [2021-10-28 22:47:50,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:50,069 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-10-28 22:47:50,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.619047619047619) internal successors, (97), 20 states have internal predecessors, (97), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-10-28 22:47:50,070 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-10-28 22:47:50,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-10-28 22:47:50,076 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:50,076 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:50,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-28 22:47:50,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:50,307 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:50,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:50,307 INFO L85 PathProgramCache]: Analyzing trace with hash 16497858, now seen corresponding path program 4 times [2021-10-28 22:47:50,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:50,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074269996] [2021-10-28 22:47:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:50,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:50,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:50,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:50,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-10-28 22:47:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 3 proven. 917 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-10-28 22:47:50,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:50,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074269996] [2021-10-28 22:47:50,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074269996] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:50,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440314291] [2021-10-28 22:47:50,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 22:47:50,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:50,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:50,704 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:50,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-28 22:47:51,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 22:47:51,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:47:51,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 22:47:51,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 635 proven. 286 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-10-28 22:47:52,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440314291] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:52,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:47:52,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-10-28 22:47:52,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940853370] [2021-10-28 22:47:52,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-28 22:47:52,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:52,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-28 22:47:52,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-10-28 22:47:52,371 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 29 states, 29 states have (on average 5.275862068965517) internal successors, (153), 28 states have internal predecessors, (153), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:47:52,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:52,966 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2021-10-28 22:47:52,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-28 22:47:52,966 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.275862068965517) internal successors, (153), 28 states have internal predecessors, (153), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 150 [2021-10-28 22:47:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:52,967 INFO L225 Difference]: With dead ends: 107 [2021-10-28 22:47:52,967 INFO L226 Difference]: Without dead ends: 104 [2021-10-28 22:47:52,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-10-28 22:47:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-28 22:47:52,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-10-28 22:47:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 91 states have (on average 1.043956043956044) internal successors, (95), 92 states have internal predecessors, (95), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:47:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-10-28 22:47:52,971 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 150 [2021-10-28 22:47:52,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:52,972 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-10-28 22:47:52,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.275862068965517) internal successors, (153), 28 states have internal predecessors, (153), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:47:52,972 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-10-28 22:47:52,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-10-28 22:47:52,973 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:52,974 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:53,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-28 22:47:53,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-28 22:47:53,182 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:53,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:53,182 INFO L85 PathProgramCache]: Analyzing trace with hash -846233464, now seen corresponding path program 5 times [2021-10-28 22:47:53,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:53,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003948207] [2021-10-28 22:47:53,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:53,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:53,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:53,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:53,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:53,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-10-28 22:47:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 3 proven. 1090 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2021-10-28 22:47:53,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:53,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003948207] [2021-10-28 22:47:53,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003948207] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:53,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195601807] [2021-10-28 22:47:53,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 22:47:53,647 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:53,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:53,655 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:53,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-28 22:47:54,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-10-28 22:47:54,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:47:54,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-28 22:47:54,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 752 proven. 342 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2021-10-28 22:47:55,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195601807] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:55,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 22:47:55,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-10-28 22:47:55,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620027389] [2021-10-28 22:47:55,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-28 22:47:55,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:55,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-28 22:47:55,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-10-28 22:47:55,127 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 31 states, 31 states have (on average 5.258064516129032) internal successors, (163), 30 states have internal predecessors, (163), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:47:55,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:55,726 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2021-10-28 22:47:55,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 22:47:55,726 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.258064516129032) internal successors, (163), 30 states have internal predecessors, (163), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 160 [2021-10-28 22:47:55,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:55,727 INFO L225 Difference]: With dead ends: 112 [2021-10-28 22:47:55,727 INFO L226 Difference]: Without dead ends: 109 [2021-10-28 22:47:55,728 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-10-28 22:47:55,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-28 22:47:55,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-10-28 22:47:55,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 97 states have internal predecessors, (100), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-10-28 22:47:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-10-28 22:47:55,732 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 160 [2021-10-28 22:47:55,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:55,733 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-10-28 22:47:55,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.258064516129032) internal successors, (163), 30 states have internal predecessors, (163), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-10-28 22:47:55,733 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-10-28 22:47:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-10-28 22:47:55,735 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 22:47:55,735 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:55,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-10-28 22:47:55,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-28 22:47:55,936 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-28 22:47:55,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 22:47:55,936 INFO L85 PathProgramCache]: Analyzing trace with hash 609725890, now seen corresponding path program 6 times [2021-10-28 22:47:55,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 22:47:55,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281569960] [2021-10-28 22:47:55,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 22:47:55,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 22:47:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:55,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 22:47:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:55,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-28 22:47:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:56,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-10-28 22:47:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 22:47:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 3 proven. 1278 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2021-10-28 22:47:56,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 22:47:56,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281569960] [2021-10-28 22:47:56,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281569960] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 22:47:56,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063029302] [2021-10-28 22:47:56,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 22:47:56,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 22:47:56,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 22:47:56,376 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 22:47:56,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-28 22:47:57,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-28 22:47:57,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 22:47:57,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-28 22:47:57,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 22:47:57,174 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-28 22:47:57,175 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-10-28 22:47:57,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-10-28 22:47:58,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1692 trivial. 0 not checked. [2021-10-28 22:47:58,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063029302] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 22:47:58,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-28 22:47:58,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [18] total 23 [2021-10-28 22:47:58,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476322571] [2021-10-28 22:47:58,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 22:47:58,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 22:47:58,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 22:47:58,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-10-28 22:47:58,638 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:58,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 22:47:58,691 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2021-10-28 22:47:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 22:47:58,692 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 170 [2021-10-28 22:47:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 22:47:58,693 INFO L225 Difference]: With dead ends: 103 [2021-10-28 22:47:58,693 INFO L226 Difference]: Without dead ends: 0 [2021-10-28 22:47:58,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-10-28 22:47:58,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-28 22:47:58,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-28 22:47:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 22:47:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-28 22:47:58,694 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2021-10-28 22:47:58,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 22:47:58,694 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-28 22:47:58,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 22:47:58,694 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-28 22:47:58,695 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-28 22:47:58,697 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr0ASSERT_VIOLATIONARRAY_INDEX [2021-10-28 22:47:58,697 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr1REQUIRES_VIOLATION [2021-10-28 22:47:58,697 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr2REQUIRES_VIOLATION [2021-10-28 22:47:58,698 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-28 22:47:58,698 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-28 22:47:58,698 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-28 22:47:58,698 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-28 22:47:58,698 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 22:47:58,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-28 22:47:58,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-28 22:47:58,914 INFO L731 BasicCegarLoop]: Path program histogram: [6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 22:47:58,915 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 22:47:58,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 10:47:58 BoogieIcfgContainer [2021-10-28 22:47:58,917 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 22:47:58,918 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 22:47:58,918 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 22:47:58,918 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 22:47:58,919 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:47:24" (3/4) ... [2021-10-28 22:47:58,927 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-28 22:47:58,934 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-28 22:47:58,938 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2021-10-28 22:47:58,939 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-28 22:47:58,943 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-10-28 22:47:58,943 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-28 22:47:58,943 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-28 22:47:58,943 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-28 22:47:58,969 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 22:47:58,970 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 22:47:58,971 INFO L168 Benchmark]: Toolchain (without parser) took 35085.72 ms. Allocated memory was 90.2 MB in the beginning and 247.5 MB in the end (delta: 157.3 MB). Free memory was 61.6 MB in the beginning and 148.4 MB in the end (delta: -86.8 MB). Peak memory consumption was 71.7 MB. Max. memory is 16.1 GB. [2021-10-28 22:47:58,971 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 90.2 MB. Free memory was 58.8 MB in the beginning and 58.8 MB in the end (delta: 19.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 22:47:58,971 INFO L168 Benchmark]: CACSL2BoogieTranslator took 208.05 ms. Allocated memory is still 90.2 MB. Free memory was 61.3 MB in the beginning and 52.4 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 22:47:58,972 INFO L168 Benchmark]: Boogie Preprocessor took 32.77 ms. Allocated memory is still 90.2 MB. Free memory was 52.4 MB in the beginning and 50.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:47:58,972 INFO L168 Benchmark]: RCFGBuilder took 358.90 ms. Allocated memory is still 90.2 MB. Free memory was 50.8 MB in the beginning and 40.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 22:47:58,973 INFO L168 Benchmark]: TraceAbstraction took 34427.85 ms. Allocated memory was 90.2 MB in the beginning and 247.5 MB in the end (delta: 157.3 MB). Free memory was 39.8 MB in the beginning and 150.5 MB in the end (delta: -110.7 MB). Peak memory consumption was 48.7 MB. Max. memory is 16.1 GB. [2021-10-28 22:47:58,973 INFO L168 Benchmark]: Witness Printer took 51.66 ms. Allocated memory is still 247.5 MB. Free memory was 150.5 MB in the beginning and 148.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 22:47:58,975 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 90.2 MB. Free memory was 58.8 MB in the beginning and 58.8 MB in the end (delta: 19.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 208.05 ms. Allocated memory is still 90.2 MB. Free memory was 61.3 MB in the beginning and 52.4 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.77 ms. Allocated memory is still 90.2 MB. Free memory was 52.4 MB in the beginning and 50.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 358.90 ms. Allocated memory is still 90.2 MB. Free memory was 50.8 MB in the beginning and 40.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 34427.85 ms. Allocated memory was 90.2 MB in the beginning and 247.5 MB in the end (delta: 157.3 MB). Free memory was 39.8 MB in the beginning and 150.5 MB in the end (delta: -110.7 MB). Peak memory consumption was 48.7 MB. Max. memory is 16.1 GB. * Witness Printer took 51.66 ms. Allocated memory is still 247.5 MB. Free memory was 150.5 MB in the beginning and 148.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: array index is always in bounds For all program executions holds that array index is always in bounds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 27]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 30]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 40 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 34.3s, OverallIterations: 25, TraceHistogramMax: 26, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 6.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 617 SDtfs, 1899 SDslu, 2091 SDs, 0 SdLazy, 2846 SolverSat, 306 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1990 GetRequests, 1547 SyntacticMatches, 16 SemanticMatches, 427 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=24, InterpolantAutomatonStates: 227, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 132 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 16.2s InterpolantComputationTime, 3239 NumberOfCodeBlocks, 2689 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 3195 ConstructedInterpolants, 462 QuantifiedInterpolants, 20385 SizeOfPredicates, 30 NumberOfNonLiveVariables, 3223 ConjunctsInSsa, 172 ConjunctsInUnsatCore, 44 InterpolantComputations, 11 PerfectInterpolantSequences, 10778/18637 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-28 22:47:59,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_69ac7561-2e11-4bda-91c3-13a3062b3d7e/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...