./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be --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 f3d22aeda2fb15b9dd79854281ee0f5e475c0f7ee1551b76594f45703ddc81df ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:26:32,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:26:32,249 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:26:32,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:26:32,302 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:26:32,306 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:26:32,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:26:32,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:26:32,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:26:32,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:26:32,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:26:32,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:26:32,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:26:32,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:26:32,328 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:26:32,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:26:32,338 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:26:32,339 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:26:32,342 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:26:32,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:26:32,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:26:32,352 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:26:32,353 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:26:32,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:26:32,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:26:32,363 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:26:32,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:26:32,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:26:32,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:26:32,368 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:26:32,368 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:26:32,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:26:32,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:26:32,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:26:32,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:26:32,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:26:32,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:26:32,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:26:32,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:26:32,375 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:26:32,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:26:32,377 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-21 19:26:32,412 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:26:32,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:26:32,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:26:32,413 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:26:32,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:26:32,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:26:32,415 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:26:32,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:26:32,415 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:26:32,415 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:26:32,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:26:32,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:26:32,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:26:32,416 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-21 19:26:32,416 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-21 19:26:32,417 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-21 19:26:32,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:26:32,417 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-21 19:26:32,417 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:26:32,417 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:26:32,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:26:32,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:26:32,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:26:32,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:26:32,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:26:32,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:26:32,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:26:32,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:26:32,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:26:32,420 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_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3d22aeda2fb15b9dd79854281ee0f5e475c0f7ee1551b76594f45703ddc81df [2021-10-21 19:26:32,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:26:32,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:26:32,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:26:32,683 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:26:32,684 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:26:32,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2021-10-21 19:26:32,765 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/data/85f12f6a1/177eab25971143659fca099bc0d32f94/FLAGbff7d45d5 [2021-10-21 19:26:33,199 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:26:33,199 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/sv-benchmarks/c/ldv-memsafety/ArraysOfVariableLength4.c [2021-10-21 19:26:33,207 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/data/85f12f6a1/177eab25971143659fca099bc0d32f94/FLAGbff7d45d5 [2021-10-21 19:26:33,586 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/data/85f12f6a1/177eab25971143659fca099bc0d32f94 [2021-10-21 19:26:33,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:26:33,589 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-21 19:26:33,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:26:33,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:26:33,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:26:33,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:26:33" (1/1) ... [2021-10-21 19:26:33,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6068b190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:33, skipping insertion in model container [2021-10-21 19:26:33,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:26:33" (1/1) ... [2021-10-21 19:26:33,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:26:33,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:26:33,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:26:33,753 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:26:33,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:26:33,796 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:26:33,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:33 WrapperNode [2021-10-21 19:26:33,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:26:33,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:26:33,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:26:33,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:26:33,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:33" (1/1) ... [2021-10-21 19:26:33,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:33" (1/1) ... [2021-10-21 19:26:33,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:33" (1/1) ... [2021-10-21 19:26:33,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:33" (1/1) ... [2021-10-21 19:26:33,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:33" (1/1) ... [2021-10-21 19:26:33,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:33" (1/1) ... [2021-10-21 19:26:33,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:33" (1/1) ... [2021-10-21 19:26:33,826 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:26:33,827 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:26:33,827 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:26:33,827 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:26:33,828 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:33" (1/1) ... [2021-10-21 19:26:33,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:26:33,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:33,862 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:26:33,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:26:33,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-21 19:26:33,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:26:33,901 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-10-21 19:26:33,901 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-21 19:26:33,901 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-10-21 19:26:33,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:26:33,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-21 19:26:33,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:26:33,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:26:33,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:26:33,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-21 19:26:33,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:26:34,121 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:26:34,121 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-10-21 19:26:34,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:26:34 BoogieIcfgContainer [2021-10-21 19:26:34,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:26:34,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:26:34,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:26:34,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:26:34,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:26:33" (1/3) ... [2021-10-21 19:26:34,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77937df0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:26:34, skipping insertion in model container [2021-10-21 19:26:34,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:26:33" (2/3) ... [2021-10-21 19:26:34,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77937df0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:26:34, skipping insertion in model container [2021-10-21 19:26:34,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:26:34" (3/3) ... [2021-10-21 19:26:34,132 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysOfVariableLength4.c [2021-10-21 19:26:34,137 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:26:34,137 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-10-21 19:26:34,184 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:26:34,191 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 [2021-10-21 19:26:34,191 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-21 19:26:34,207 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) [2021-10-21 19:26:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-21 19:26:34,215 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:34,216 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:34,216 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:34,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:34,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2021-10-21 19:26:34,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:34,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096292880] [2021-10-21 19:26:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:34,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:34,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:34,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:34,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:34,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096292880] [2021-10-21 19:26:34,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096292880] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:34,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:34,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:26:34,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014110613] [2021-10-21 19:26:34,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:34,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:34,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:34,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:34,467 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) [2021-10-21 19:26:34,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:34,595 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-10-21 19:26:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:26:34,597 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 [2021-10-21 19:26:34,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:34,605 INFO L225 Difference]: With dead ends: 58 [2021-10-21 19:26:34,605 INFO L226 Difference]: Without dead ends: 54 [2021-10-21 19:26:34,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-21 19:26:34,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-10-21 19:26:34,634 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) [2021-10-21 19:26:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-10-21 19:26:34,636 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2021-10-21 19:26:34,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:34,637 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-10-21 19:26:34,637 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) [2021-10-21 19:26:34,637 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-10-21 19:26:34,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-21 19:26:34,638 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:34,638 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:34,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:26:34,639 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:34,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:34,640 INFO L82 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2021-10-21 19:26:34,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:34,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575366116] [2021-10-21 19:26:34,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:34,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:34,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:34,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:34,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575366116] [2021-10-21 19:26:34,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575366116] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:34,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:34,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:26:34,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610253641] [2021-10-21 19:26:34,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:34,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:34,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:34,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:26:34,703 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) [2021-10-21 19:26:34,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:34,778 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-10-21 19:26:34,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:34,779 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 [2021-10-21 19:26:34,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:34,781 INFO L225 Difference]: With dead ends: 49 [2021-10-21 19:26:34,781 INFO L226 Difference]: Without dead ends: 49 [2021-10-21 19:26:34,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:34,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-21 19:26:34,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2021-10-21 19:26:34,787 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) [2021-10-21 19:26:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-10-21 19:26:34,788 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2021-10-21 19:26:34,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:34,789 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-10-21 19:26:34,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (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) [2021-10-21 19:26:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-10-21 19:26:34,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:26:34,790 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:34,790 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:34,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:26:34,790 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting fooErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:34,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:34,791 INFO L82 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2021-10-21 19:26:34,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:34,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793964217] [2021-10-21 19:26:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:34,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:34,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:34,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:34,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:34,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793964217] [2021-10-21 19:26:34,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793964217] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:34,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:34,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:26:34,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454607187] [2021-10-21 19:26:34,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:26:34,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:26:34,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:26:34,968 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2021-10-21 19:26:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:35,082 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-10-21 19:26:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:26:35,083 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 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 [2021-10-21 19:26:35,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:35,085 INFO L225 Difference]: With dead ends: 40 [2021-10-21 19:26:35,085 INFO L226 Difference]: Without dead ends: 40 [2021-10-21 19:26:35,086 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:26:35,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-21 19:26:35,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-21 19:26:35,096 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) [2021-10-21 19:26:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-10-21 19:26:35,104 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2021-10-21 19:26:35,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:35,105 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-10-21 19:26:35,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2021-10-21 19:26:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-10-21 19:26:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:26:35,106 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:35,106 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:35,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:26:35,107 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:35,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2021-10-21 19:26:35,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:35,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363202427] [2021-10-21 19:26:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:35,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:35,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:35,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:35,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363202427] [2021-10-21 19:26:35,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363202427] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:35,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:35,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:26:35,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240040009] [2021-10-21 19:26:35,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:26:35,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:35,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:26:35,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:26:35,223 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2021-10-21 19:26:35,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:35,355 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-10-21 19:26:35,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:26:35,356 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 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 [2021-10-21 19:26:35,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:35,358 INFO L225 Difference]: With dead ends: 46 [2021-10-21 19:26:35,358 INFO L226 Difference]: Without dead ends: 46 [2021-10-21 19:26:35,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:26:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-21 19:26:35,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-10-21 19:26:35,364 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) [2021-10-21 19:26:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-10-21 19:26:35,366 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2021-10-21 19:26:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:35,366 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-10-21 19:26:35,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2021-10-21 19:26:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-10-21 19:26:35,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:26:35,368 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:35,368 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:35,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:26:35,369 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:35,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:35,370 INFO L82 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2021-10-21 19:26:35,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:35,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209501920] [2021-10-21 19:26:35,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:35,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:35,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:35,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:26:35,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:35,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:35,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209501920] [2021-10-21 19:26:35,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209501920] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:35,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:35,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:26:35,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837979730] [2021-10-21 19:26:35,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:26:35,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:35,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:26:35,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:35,514 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) [2021-10-21 19:26:35,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:35,631 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-10-21 19:26:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:26:35,632 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 [2021-10-21 19:26:35,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:35,634 INFO L225 Difference]: With dead ends: 46 [2021-10-21 19:26:35,635 INFO L226 Difference]: Without dead ends: 43 [2021-10-21 19:26:35,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:26:35,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-21 19:26:35,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2021-10-21 19:26:35,640 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) [2021-10-21 19:26:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-10-21 19:26:35,644 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2021-10-21 19:26:35,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:35,644 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-10-21 19:26:35,646 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) [2021-10-21 19:26:35,646 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-10-21 19:26:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-21 19:26:35,647 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:35,647 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:35,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-21 19:26:35,648 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:35,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:35,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2021-10-21 19:26:35,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:35,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027917131] [2021-10-21 19:26:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:35,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:35,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:35,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:35,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:35,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027917131] [2021-10-21 19:26:35,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027917131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:35,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012293084] [2021-10-21 19:26:35,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:35,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:35,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:35,756 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:35,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:26:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:35,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:26:35,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:35,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:35,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012293084] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:35,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:26:35,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-10-21 19:26:35,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070462019] [2021-10-21 19:26:35,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:26:35,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:35,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:26:35,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:26:35,933 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) [2021-10-21 19:26:36,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:36,056 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-10-21 19:26:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:26:36,057 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 [2021-10-21 19:26:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:36,059 INFO L225 Difference]: With dead ends: 52 [2021-10-21 19:26:36,060 INFO L226 Difference]: Without dead ends: 52 [2021-10-21 19:26:36,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:26:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-21 19:26:36,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-10-21 19:26:36,076 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) [2021-10-21 19:26:36,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-10-21 19:26:36,077 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 16 [2021-10-21 19:26:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:36,077 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-10-21 19:26:36,077 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) [2021-10-21 19:26:36,078 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-10-21 19:26:36,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-21 19:26:36,078 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:36,078 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:36,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:36,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:36,300 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:36,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:36,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1213405753, now seen corresponding path program 1 times [2021-10-21 19:26:36,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:36,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145001533] [2021-10-21 19:26:36,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:36,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:36,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:26:36,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:36,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145001533] [2021-10-21 19:26:36,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145001533] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:36,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:26:36,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-21 19:26:36,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787470053] [2021-10-21 19:26:36,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:26:36,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:26:36,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:26:36,395 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2021-10-21 19:26:36,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:36,553 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-10-21 19:26:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:26:36,554 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 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 [2021-10-21 19:26:36,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:36,555 INFO L225 Difference]: With dead ends: 44 [2021-10-21 19:26:36,555 INFO L226 Difference]: Without dead ends: 44 [2021-10-21 19:26:36,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:26:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-21 19:26:36,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-21 19:26:36,559 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) [2021-10-21 19:26:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-10-21 19:26:36,559 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 17 [2021-10-21 19:26:36,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:36,560 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-10-21 19:26:36,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 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) [2021-10-21 19:26:36,560 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-10-21 19:26:36,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-21 19:26:36,561 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:36,561 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:36,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-21 19:26:36,562 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:36,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:36,563 INFO L82 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2021-10-21 19:26:36,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:36,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606360461] [2021-10-21 19:26:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:36,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:36,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:36,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:26:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:36,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:36,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:36,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606360461] [2021-10-21 19:26:36,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606360461] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:36,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853073687] [2021-10-21 19:26:36,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:36,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:36,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:36,684 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:36,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:26:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:36,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:26:36,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:36,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853073687] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:36,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:26:36,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-10-21 19:26:36,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584431458] [2021-10-21 19:26:36,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:26:36,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:36,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:26:36,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:26:36,888 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) [2021-10-21 19:26:37,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:37,071 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-10-21 19:26:37,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:26:37,071 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 [2021-10-21 19:26:37,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:37,072 INFO L225 Difference]: With dead ends: 50 [2021-10-21 19:26:37,072 INFO L226 Difference]: Without dead ends: 47 [2021-10-21 19:26:37,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:26:37,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-21 19:26:37,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2021-10-21 19:26:37,076 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) [2021-10-21 19:26:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-10-21 19:26:37,076 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 20 [2021-10-21 19:26:37,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:37,077 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-10-21 19:26:37,077 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) [2021-10-21 19:26:37,077 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-10-21 19:26:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:26:37,078 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:37,078 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:37,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:37,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:37,288 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:37,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:37,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1483602424, now seen corresponding path program 2 times [2021-10-21 19:26:37,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:37,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623675887] [2021-10-21 19:26:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:37,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:37,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:37,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:37,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:37,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623675887] [2021-10-21 19:26:37,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623675887] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:37,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516974179] [2021-10-21 19:26:37,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:26:37,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:37,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:37,346 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:37,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:26:37,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:26:37,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:26:37,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:26:37,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:26:37,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516974179] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:37,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:26:37,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2021-10-21 19:26:37,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571922266] [2021-10-21 19:26:37,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:26:37,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:37,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:26:37,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:26:37,555 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) [2021-10-21 19:26:37,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:37,764 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-10-21 19:26:37,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:26:37,764 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 [2021-10-21 19:26:37,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:37,765 INFO L225 Difference]: With dead ends: 58 [2021-10-21 19:26:37,765 INFO L226 Difference]: Without dead ends: 58 [2021-10-21 19:26:37,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:26:37,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-21 19:26:37,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2021-10-21 19:26:37,768 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) [2021-10-21 19:26:37,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-10-21 19:26:37,769 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 21 [2021-10-21 19:26:37,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:37,769 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-10-21 19:26:37,769 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) [2021-10-21 19:26:37,769 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-10-21 19:26:37,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:26:37,770 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:37,770 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:37,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:37,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-21 19:26:37,971 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:37,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:37,971 INFO L82 PathProgramCache]: Analyzing trace with hash -523456178, now seen corresponding path program 2 times [2021-10-21 19:26:37,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:37,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824822317] [2021-10-21 19:26:37,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:37,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:38,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:38,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:26:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:38,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:38,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:38,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824822317] [2021-10-21 19:26:38,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824822317] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:38,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803254417] [2021-10-21 19:26:38,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:26:38,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:38,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:38,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:38,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:26:38,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 19:26:38,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:26:38,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:26:38,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:38,169 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:26:38,169 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 [2021-10-21 19:26:38,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:26:38,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803254417] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:38,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:26:38,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-10-21 19:26:38,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547021047] [2021-10-21 19:26:38,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:38,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:38,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:38,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:26:38,280 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) [2021-10-21 19:26:38,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:38,300 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-10-21 19:26:38,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:38,300 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 [2021-10-21 19:26:38,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:38,301 INFO L225 Difference]: With dead ends: 40 [2021-10-21 19:26:38,301 INFO L226 Difference]: Without dead ends: 40 [2021-10-21 19:26:38,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:26:38,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-21 19:26:38,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-21 19:26:38,304 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) [2021-10-21 19:26:38,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-10-21 19:26:38,305 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 25 [2021-10-21 19:26:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:38,305 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-10-21 19:26:38,305 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) [2021-10-21 19:26:38,305 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-10-21 19:26:38,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-21 19:26:38,306 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:38,306 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:38,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:38,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:38,532 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:38,532 INFO L82 PathProgramCache]: Analyzing trace with hash -523456177, now seen corresponding path program 1 times [2021-10-21 19:26:38,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:38,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482671315] [2021-10-21 19:26:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:38,533 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:38,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:38,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:26:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:38,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:38,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482671315] [2021-10-21 19:26:38,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482671315] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:38,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389433877] [2021-10-21 19:26:38,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:38,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:38,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:38,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:38,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:26:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:38,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:26:38,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:38,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389433877] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:38,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:26:38,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-10-21 19:26:38,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87322693] [2021-10-21 19:26:38,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:26:38,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:38,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:26:38,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:26:38,924 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) [2021-10-21 19:26:39,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:39,146 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2021-10-21 19:26:39,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:26:39,146 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 [2021-10-21 19:26:39,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:39,147 INFO L225 Difference]: With dead ends: 52 [2021-10-21 19:26:39,147 INFO L226 Difference]: Without dead ends: 49 [2021-10-21 19:26:39,147 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:26:39,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-21 19:26:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2021-10-21 19:26:39,150 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) [2021-10-21 19:26:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2021-10-21 19:26:39,150 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 25 [2021-10-21 19:26:39,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:39,150 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2021-10-21 19:26:39,151 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) [2021-10-21 19:26:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2021-10-21 19:26:39,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-21 19:26:39,152 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:39,152 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:26:39,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:39,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:39,364 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:39,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:39,364 INFO L82 PathProgramCache]: Analyzing trace with hash -661735506, now seen corresponding path program 2 times [2021-10-21 19:26:39,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:39,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752668653] [2021-10-21 19:26:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:39,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:39,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:39,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:26:39,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:39,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:39,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752668653] [2021-10-21 19:26:39,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752668653] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:39,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682323350] [2021-10-21 19:26:39,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:26:39,524 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:39,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:39,525 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:39,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:26:39,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 19:26:39,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:26:39,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:26:39,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:39,652 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:26:39,652 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 [2021-10-21 19:26:39,657 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 [2021-10-21 19:26:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-21 19:26:40,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682323350] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:40,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:26:40,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-10-21 19:26:40,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065309497] [2021-10-21 19:26:40,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:26:40,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:40,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:26:40,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:26:40,003 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) [2021-10-21 19:26:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:40,048 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-10-21 19:26:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:26:40,048 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 [2021-10-21 19:26:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:40,049 INFO L225 Difference]: With dead ends: 50 [2021-10-21 19:26:40,049 INFO L226 Difference]: Without dead ends: 50 [2021-10-21 19:26:40,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:26:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-21 19:26:40,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-10-21 19:26:40,053 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) [2021-10-21 19:26:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-10-21 19:26:40,053 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 30 [2021-10-21 19:26:40,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:40,054 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-10-21 19:26:40,054 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) [2021-10-21 19:26:40,054 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-10-21 19:26:40,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-21 19:26:40,056 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:40,056 INFO L512 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] [2021-10-21 19:26:40,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-21 19:26:40,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:40,284 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:40,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:40,284 INFO L82 PathProgramCache]: Analyzing trace with hash 494772831, now seen corresponding path program 1 times [2021-10-21 19:26:40,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:40,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449554116] [2021-10-21 19:26:40,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:40,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:40,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:40,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:26:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-21 19:26:40,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:40,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449554116] [2021-10-21 19:26:40,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449554116] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:40,330 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424303419] [2021-10-21 19:26:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:40,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:40,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:40,331 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:40,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:26:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:40,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:26:40,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:26:40,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424303419] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:40,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:26:40,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2021-10-21 19:26:40,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709095387] [2021-10-21 19:26:40,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-21 19:26:40,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:40,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:26:40,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:26:40,668 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) [2021-10-21 19:26:40,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:40,881 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2021-10-21 19:26:40,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:26:40,882 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 [2021-10-21 19:26:40,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:40,883 INFO L225 Difference]: With dead ends: 84 [2021-10-21 19:26:40,883 INFO L226 Difference]: Without dead ends: 81 [2021-10-21 19:26:40,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:26:40,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-21 19:26:40,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 60. [2021-10-21 19:26:40,888 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) [2021-10-21 19:26:40,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-10-21 19:26:40,889 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 36 [2021-10-21 19:26:40,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:40,889 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-10-21 19:26:40,889 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) [2021-10-21 19:26:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-10-21 19:26:40,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-21 19:26:40,892 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:40,892 INFO L512 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] [2021-10-21 19:26:40,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:41,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:26:41,112 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:41,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:41,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1980281553, now seen corresponding path program 1 times [2021-10-21 19:26:41,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:41,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644761158] [2021-10-21 19:26:41,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:41,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:41,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:41,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:41,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:26:41,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:41,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-10-21 19:26:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-21 19:26:41,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:41,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644761158] [2021-10-21 19:26:41,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644761158] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:41,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362106775] [2021-10-21 19:26:41,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:41,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:41,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:41,373 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:41,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:26:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:41,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:26:41,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 95 proven. 34 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-21 19:26:41,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362106775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:41,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:26:41,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-10-21 19:26:41,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799398322] [2021-10-21 19:26:41,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:26:41,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:41,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:26:41,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:26:41,848 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) [2021-10-21 19:26:42,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:42,144 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2021-10-21 19:26:42,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:26:42,144 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 [2021-10-21 19:26:42,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:42,145 INFO L225 Difference]: With dead ends: 72 [2021-10-21 19:26:42,145 INFO L226 Difference]: Without dead ends: 69 [2021-10-21 19:26:42,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:26:42,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-21 19:26:42,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2021-10-21 19:26:42,149 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) [2021-10-21 19:26:42,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-10-21 19:26:42,150 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 66 [2021-10-21 19:26:42,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:42,151 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-10-21 19:26:42,151 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) [2021-10-21 19:26:42,151 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-10-21 19:26:42,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-21 19:26:42,152 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:42,152 INFO L512 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] [2021-10-21 19:26:42,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:42,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 19:26:42,360 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:42,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:42,360 INFO L82 PathProgramCache]: Analyzing trace with hash -453177461, now seen corresponding path program 2 times [2021-10-21 19:26:42,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:42,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124693234] [2021-10-21 19:26:42,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:42,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:42,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:42,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:26:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:42,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-10-21 19:26:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 2 proven. 194 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-10-21 19:26:42,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:42,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124693234] [2021-10-21 19:26:42,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124693234] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:42,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854578032] [2021-10-21 19:26:42,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:26:42,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:42,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:42,560 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:42,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:26:42,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:26:42,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:26:42,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:26:42,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 142 proven. 55 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-21 19:26:43,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854578032] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:43,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:26:43,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-10-21 19:26:43,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661470624] [2021-10-21 19:26:43,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:26:43,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:43,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:26:43,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:26:43,148 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) [2021-10-21 19:26:43,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:43,497 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-10-21 19:26:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:26:43,498 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 [2021-10-21 19:26:43,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:43,498 INFO L225 Difference]: With dead ends: 77 [2021-10-21 19:26:43,499 INFO L226 Difference]: Without dead ends: 74 [2021-10-21 19:26:43,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 379.2ms TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:26:43,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-21 19:26:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2021-10-21 19:26:43,502 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) [2021-10-21 19:26:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-10-21 19:26:43,503 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 76 [2021-10-21 19:26:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:43,503 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-10-21 19:26:43,503 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) [2021-10-21 19:26:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-10-21 19:26:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-21 19:26:43,504 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:43,505 INFO L512 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] [2021-10-21 19:26:43,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:43,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:26:43,724 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:43,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:43,724 INFO L82 PathProgramCache]: Analyzing trace with hash -197968815, now seen corresponding path program 3 times [2021-10-21 19:26:43,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:43,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591110670] [2021-10-21 19:26:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:43,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:43,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:43,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:26:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:43,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-10-21 19:26:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 277 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-10-21 19:26:43,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:43,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591110670] [2021-10-21 19:26:43,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591110670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:43,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581743722] [2021-10-21 19:26:43,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:26:43,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:43,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:43,985 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:44,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:26:44,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:26:44,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:26:44,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 19:26:44,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:44,224 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 [2021-10-21 19:26:44,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-10-21 19:26:44,978 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 359 trivial. 0 not checked. [2021-10-21 19:26:44,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581743722] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:44,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:26:44,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 15 [2021-10-21 19:26:44,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30813138] [2021-10-21 19:26:44,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:26:44,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:44,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:26:44,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:26:44,980 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 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) [2021-10-21 19:26:45,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:45,433 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2021-10-21 19:26:45,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:26:45,433 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 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 [2021-10-21 19:26:45,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:45,434 INFO L225 Difference]: With dead ends: 87 [2021-10-21 19:26:45,434 INFO L226 Difference]: Without dead ends: 84 [2021-10-21 19:26:45,435 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 412.3ms TimeCoverageRelationStatistics Valid=160, Invalid=392, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:26:45,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-21 19:26:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2021-10-21 19:26:45,438 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) [2021-10-21 19:26:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-10-21 19:26:45,439 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 86 [2021-10-21 19:26:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:45,439 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-10-21 19:26:45,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 14 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) [2021-10-21 19:26:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-10-21 19:26:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-21 19:26:45,441 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:45,441 INFO L512 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] [2021-10-21 19:26:45,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:45,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:26:45,652 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:45,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:45,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1122221700, now seen corresponding path program 2 times [2021-10-21 19:26:45,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:45,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050609013] [2021-10-21 19:26:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:45,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:45,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:45,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:45,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:26:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:45,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-10-21 19:26:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2021-10-21 19:26:45,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:45,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050609013] [2021-10-21 19:26:45,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050609013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:45,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423068594] [2021-10-21 19:26:45,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:26:45,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:45,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:45,812 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:45,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:26:46,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 19:26:46,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:26:46,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:26:46,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:46,076 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:26:46,076 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 [2021-10-21 19:26:46,080 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 [2021-10-21 19:26:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-10-21 19:26:46,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423068594] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:46,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:26:46,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-10-21 19:26:46,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069057880] [2021-10-21 19:26:46,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:26:46,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:46,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:26:46,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:26:46,893 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) [2021-10-21 19:26:46,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:46,936 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-10-21 19:26:46,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:26:46,937 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 [2021-10-21 19:26:46,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:46,938 INFO L225 Difference]: With dead ends: 79 [2021-10-21 19:26:46,938 INFO L226 Difference]: Without dead ends: 79 [2021-10-21 19:26:46,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:26:46,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-21 19:26:46,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-10-21 19:26:46,942 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) [2021-10-21 19:26:46,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2021-10-21 19:26:46,943 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 102 [2021-10-21 19:26:46,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:46,943 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2021-10-21 19:26:46,943 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) [2021-10-21 19:26:46,944 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2021-10-21 19:26:46,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-21 19:26:46,946 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:46,946 INFO L512 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] [2021-10-21 19:26:46,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:47,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-21 19:26:47,160 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:47,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:47,160 INFO L82 PathProgramCache]: Analyzing trace with hash -81231572, now seen corresponding path program 1 times [2021-10-21 19:26:47,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:47,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672707609] [2021-10-21 19:26:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:47,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:47,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:47,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:26:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:47,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-10-21 19:26:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 3 proven. 375 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-10-21 19:26:47,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:47,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672707609] [2021-10-21 19:26:47,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672707609] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:47,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532047725] [2021-10-21 19:26:47,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:47,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:47,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:47,436 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:47,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:26:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:47,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:26:47,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:48,344 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 267 proven. 112 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-10-21 19:26:48,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532047725] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:48,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:26:48,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-10-21 19:26:48,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954545443] [2021-10-21 19:26:48,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 19:26:48,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:48,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 19:26:48,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:26:48,346 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) [2021-10-21 19:26:48,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:48,794 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2021-10-21 19:26:48,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:26:48,794 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 [2021-10-21 19:26:48,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:48,795 INFO L225 Difference]: With dead ends: 90 [2021-10-21 19:26:48,795 INFO L226 Difference]: Without dead ends: 87 [2021-10-21 19:26:48,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 527.2ms TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2021-10-21 19:26:48,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-21 19:26:48,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2021-10-21 19:26:48,798 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) [2021-10-21 19:26:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2021-10-21 19:26:48,799 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 105 [2021-10-21 19:26:48,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:48,799 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2021-10-21 19:26:48,800 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) [2021-10-21 19:26:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2021-10-21 19:26:48,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-21 19:26:48,801 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:48,801 INFO L512 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] [2021-10-21 19:26:48,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:49,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:26:49,028 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:49,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:49,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1970017626, now seen corresponding path program 2 times [2021-10-21 19:26:49,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:49,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72520626] [2021-10-21 19:26:49,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:49,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:49,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:49,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:26:49,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:49,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-10-21 19:26:49,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-10-21 19:26:49,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:49,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72520626] [2021-10-21 19:26:49,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72520626] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:49,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924681980] [2021-10-21 19:26:49,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:26:49,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:49,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:49,364 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:49,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:26:49,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-21 19:26:49,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:26:49,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:26:49,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:49,765 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-21 19:26:49,766 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 [2021-10-21 19:26:50,710 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-21 19:26:50,711 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 [2021-10-21 19:26:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2021-10-21 19:26:51,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924681980] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:26:51,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:26:51,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2021-10-21 19:26:51,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531379248] [2021-10-21 19:26:51,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:26:51,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:51,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:26:51,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:26:51,692 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) [2021-10-21 19:26:51,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:51,771 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-10-21 19:26:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:26:51,771 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 [2021-10-21 19:26:51,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:51,772 INFO L225 Difference]: With dead ends: 82 [2021-10-21 19:26:51,772 INFO L226 Difference]: Without dead ends: 79 [2021-10-21 19:26:51,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:26:51,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-21 19:26:51,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-10-21 19:26:51,775 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) [2021-10-21 19:26:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-10-21 19:26:51,776 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 115 [2021-10-21 19:26:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:51,776 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-10-21 19:26:51,776 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) [2021-10-21 19:26:51,776 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-10-21 19:26:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-10-21 19:26:51,777 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:51,778 INFO L512 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] [2021-10-21 19:26:51,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:51,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:51,988 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:51,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:51,988 INFO L82 PathProgramCache]: Analyzing trace with hash -940912475, now seen corresponding path program 1 times [2021-10-21 19:26:51,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:51,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394234738] [2021-10-21 19:26:51,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:51,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:52,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:52,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:52,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:26:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:52,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-10-21 19:26:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 3 proven. 488 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-10-21 19:26:52,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:52,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394234738] [2021-10-21 19:26:52,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394234738] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:52,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903398555] [2021-10-21 19:26:52,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:52,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:52,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:52,285 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:52,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:26:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:52,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:26:52,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 344 proven. 148 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-10-21 19:26:53,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903398555] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:53,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:26:53,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-10-21 19:26:53,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445783571] [2021-10-21 19:26:53,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:26:53,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:53,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:26:53,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:26:53,306 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) [2021-10-21 19:26:53,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:53,804 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-10-21 19:26:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:26:53,805 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 [2021-10-21 19:26:53,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:53,806 INFO L225 Difference]: With dead ends: 88 [2021-10-21 19:26:53,806 INFO L226 Difference]: Without dead ends: 85 [2021-10-21 19:26:53,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 577.3ms TimeCoverageRelationStatistics Valid=285, Invalid=771, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:26:53,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-21 19:26:53,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2021-10-21 19:26:53,809 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) [2021-10-21 19:26:53,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-10-21 19:26:53,810 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 116 [2021-10-21 19:26:53,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:53,811 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-10-21 19:26:53,811 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) [2021-10-21 19:26:53,811 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-10-21 19:26:53,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-10-21 19:26:53,812 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:53,813 INFO L512 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] [2021-10-21 19:26:53,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:54,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:54,028 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:54,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:54,028 INFO L82 PathProgramCache]: Analyzing trace with hash -431416353, now seen corresponding path program 2 times [2021-10-21 19:26:54,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:54,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983846013] [2021-10-21 19:26:54,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:54,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:54,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:54,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:26:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:54,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-10-21 19:26:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 3 proven. 616 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-10-21 19:26:54,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:54,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983846013] [2021-10-21 19:26:54,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983846013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:54,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566799611] [2021-10-21 19:26:54,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:26:54,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:54,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:54,380 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:54,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:26:55,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:26:55,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:26:55,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:26:55,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:55,618 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 431 proven. 189 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-10-21 19:26:55,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566799611] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:55,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:26:55,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-10-21 19:26:55,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577741983] [2021-10-21 19:26:55,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-21 19:26:55,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:55,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-21 19:26:55,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:26:55,620 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) [2021-10-21 19:26:56,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:56,122 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2021-10-21 19:26:56,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:26:56,123 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 [2021-10-21 19:26:56,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:56,124 INFO L225 Difference]: With dead ends: 93 [2021-10-21 19:26:56,124 INFO L226 Difference]: Without dead ends: 90 [2021-10-21 19:26:56,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 659.9ms TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:26:56,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-21 19:26:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2021-10-21 19:26:56,128 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) [2021-10-21 19:26:56,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2021-10-21 19:26:56,129 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 126 [2021-10-21 19:26:56,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:56,129 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2021-10-21 19:26:56,129 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) [2021-10-21 19:26:56,130 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2021-10-21 19:26:56,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-10-21 19:26:56,131 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:56,131 INFO L512 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] [2021-10-21 19:26:56,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:56,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-21 19:26:56,332 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:56,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:56,332 INFO L82 PathProgramCache]: Analyzing trace with hash -138765787, now seen corresponding path program 3 times [2021-10-21 19:26:56,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:56,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454908835] [2021-10-21 19:26:56,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:56,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:56,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:56,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:26:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:56,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-10-21 19:26:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 3 proven. 759 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2021-10-21 19:26:56,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:56,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454908835] [2021-10-21 19:26:56,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454908835] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:56,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291042834] [2021-10-21 19:26:56,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:26:56,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:56,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:56,698 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:56,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:26:57,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:26:57,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:26:57,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:26:57,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:26:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 999 trivial. 0 not checked. [2021-10-21 19:26:57,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291042834] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:57,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:26:57,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 21 [2021-10-21 19:26:57,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444014024] [2021-10-21 19:26:57,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 19:26:57,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:26:57,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 19:26:57,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:26:57,849 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) [2021-10-21 19:26:58,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:26:58,339 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2021-10-21 19:26:58,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:26:58,341 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 [2021-10-21 19:26:58,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:26:58,343 INFO L225 Difference]: With dead ends: 109 [2021-10-21 19:26:58,343 INFO L226 Difference]: Without dead ends: 106 [2021-10-21 19:26:58,344 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 526.1ms TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:26:58,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-21 19:26:58,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 95. [2021-10-21 19:26:58,347 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) [2021-10-21 19:26:58,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2021-10-21 19:26:58,348 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 136 [2021-10-21 19:26:58,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:26:58,349 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2021-10-21 19:26:58,349 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) [2021-10-21 19:26:58,349 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2021-10-21 19:26:58,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-10-21 19:26:58,351 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:26:58,351 INFO L512 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] [2021-10-21 19:26:58,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:26:58,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-21 19:26:58,573 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:26:58,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:26:58,573 INFO L82 PathProgramCache]: Analyzing trace with hash 16497858, now seen corresponding path program 4 times [2021-10-21 19:26:58,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:26:58,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254441292] [2021-10-21 19:26:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:26:58,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:26:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:58,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:26:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:58,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:26:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:58,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-10-21 19:26:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:26:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 3 proven. 917 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-10-21 19:26:58,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:26:58,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254441292] [2021-10-21 19:26:58,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254441292] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:26:58,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59081079] [2021-10-21 19:26:58,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:26:58,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:26:58,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:26:58,971 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:26:58,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:26:59,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:26:59,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:26:59,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:26:59,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:00,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 635 proven. 286 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-10-21 19:27:00,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59081079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:00,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:27:00,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-10-21 19:27:00,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479369184] [2021-10-21 19:27:00,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-21 19:27:00,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:00,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-21 19:27:00,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:27:00,636 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) [2021-10-21 19:27:01,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:01,226 INFO L93 Difference]: Finished difference Result 107 states and 111 transitions. [2021-10-21 19:27:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:27:01,227 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 [2021-10-21 19:27:01,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:01,227 INFO L225 Difference]: With dead ends: 107 [2021-10-21 19:27:01,228 INFO L226 Difference]: Without dead ends: 104 [2021-10-21 19:27:01,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 867.5ms TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-10-21 19:27:01,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-21 19:27:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-10-21 19:27:01,232 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) [2021-10-21 19:27:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-10-21 19:27:01,233 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 150 [2021-10-21 19:27:01,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:01,233 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-10-21 19:27:01,234 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) [2021-10-21 19:27:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-10-21 19:27:01,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-10-21 19:27:01,236 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:01,236 INFO L512 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] [2021-10-21 19:27:01,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:01,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-21 19:27:01,450 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:01,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:01,450 INFO L82 PathProgramCache]: Analyzing trace with hash -846233464, now seen corresponding path program 5 times [2021-10-21 19:27:01,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:01,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930979331] [2021-10-21 19:27:01,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:01,451 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:01,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:01,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:01,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-10-21 19:27:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:01,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 3 proven. 1090 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2021-10-21 19:27:01,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:01,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930979331] [2021-10-21 19:27:01,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930979331] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:01,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202315244] [2021-10-21 19:27:01,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:27:01,889 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:01,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:01,890 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:01,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:27:02,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-10-21 19:27:02,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:27:02,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:27:02,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:03,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1449 backedges. 752 proven. 342 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2021-10-21 19:27:03,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202315244] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:03,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:27:03,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2021-10-21 19:27:03,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021462126] [2021-10-21 19:27:03,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-21 19:27:03,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:03,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-21 19:27:03,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:27:03,425 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) [2021-10-21 19:27:04,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:04,066 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2021-10-21 19:27:04,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:27:04,067 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 [2021-10-21 19:27:04,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:04,068 INFO L225 Difference]: With dead ends: 112 [2021-10-21 19:27:04,068 INFO L226 Difference]: Without dead ends: 109 [2021-10-21 19:27:04,069 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 885.9ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-10-21 19:27:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-21 19:27:04,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2021-10-21 19:27:04,072 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) [2021-10-21 19:27:04,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2021-10-21 19:27:04,074 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 160 [2021-10-21 19:27:04,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:04,075 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2021-10-21 19:27:04,075 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) [2021-10-21 19:27:04,075 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2021-10-21 19:27:04,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-10-21 19:27:04,076 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:27:04,076 INFO L512 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] [2021-10-21 19:27:04,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:04,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:04,277 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-10-21 19:27:04,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:27:04,277 INFO L82 PathProgramCache]: Analyzing trace with hash 609725890, now seen corresponding path program 6 times [2021-10-21 19:27:04,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:27:04,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831812968] [2021-10-21 19:27:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:27:04,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:27:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:04,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-21 19:27:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:04,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-10-21 19:27:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:04,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-10-21 19:27:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:27:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 3 proven. 1278 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2021-10-21 19:27:04,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:27:04,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831812968] [2021-10-21 19:27:04,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831812968] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:27:04,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786726554] [2021-10-21 19:27:04,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:27:04,688 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:27:04,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:27:04,704 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:27:04,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:27:05,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-21 19:27:05,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:27:05,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:27:05,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:27:05,540 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-21 19:27:05,540 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 [2021-10-21 19:27:05,543 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 [2021-10-21 19:27:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1698 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1692 trivial. 0 not checked. [2021-10-21 19:27:06,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786726554] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:27:06,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:27:06,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [18] total 23 [2021-10-21 19:27:06,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833255457] [2021-10-21 19:27:06,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:27:06,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:27:06,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:27:06,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:27:06,834 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) [2021-10-21 19:27:06,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:27:06,879 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2021-10-21 19:27:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:27:06,880 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 [2021-10-21 19:27:06,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:27:06,880 INFO L225 Difference]: With dead ends: 103 [2021-10-21 19:27:06,880 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 19:27:06,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 350.3ms TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:27:06,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 19:27:06,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 19:27:06,881 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) [2021-10-21 19:27:06,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 19:27:06,881 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2021-10-21 19:27:06,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:27:06,882 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 19:27:06,882 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) [2021-10-21 19:27:06,882 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 19:27:06,882 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 19:27:06,884 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr0ASSERT_VIOLATIONARRAY_INDEX [2021-10-21 19:27:06,885 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr1REQUIRES_VIOLATION [2021-10-21 19:27:06,885 INFO L764 garLoopResultBuilder]: Registering result SAFE for location fooErr2REQUIRES_VIOLATION [2021-10-21 19:27:06,885 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-10-21 19:27:06,885 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-10-21 19:27:06,885 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2REQUIRES_VIOLATION [2021-10-21 19:27:06,885 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3REQUIRES_VIOLATION [2021-10-21 19:27:06,886 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr4ENSURES_VIOLATIONMEMORY_LEAK [2021-10-21 19:27:06,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:27:07,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-21 19:27:07,100 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:27:07,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:27:07 BoogieIcfgContainer [2021-10-21 19:27:07,102 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:27:07,102 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:27:07,102 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:27:07,102 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:27:07,103 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:26:34" (3/4) ... [2021-10-21 19:27:07,115 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 19:27:07,132 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-10-21 19:27:07,132 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure foo [2021-10-21 19:27:07,132 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-10-21 19:27:07,136 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2021-10-21 19:27:07,137 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-21 19:27:07,137 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-21 19:27:07,137 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 19:27:07,167 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:27:07,167 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:27:07,168 INFO L168 Benchmark]: Toolchain (without parser) took 33578.46 ms. Allocated memory was 113.2 MB in the beginning and 205.5 MB in the end (delta: 92.3 MB). Free memory was 73.9 MB in the beginning and 122.8 MB in the end (delta: -48.8 MB). Peak memory consumption was 43.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:27:07,172 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 113.2 MB. Free memory is still 90.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:27:07,172 INFO L168 Benchmark]: CACSL2BoogieTranslator took 205.30 ms. Allocated memory is still 113.2 MB. Free memory was 73.7 MB in the beginning and 89.3 MB in the end (delta: -15.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:27:07,173 INFO L168 Benchmark]: Boogie Preprocessor took 29.38 ms. Allocated memory is still 113.2 MB. Free memory was 89.3 MB in the beginning and 87.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:27:07,173 INFO L168 Benchmark]: RCFGBuilder took 296.41 ms. Allocated memory is still 113.2 MB. Free memory was 87.6 MB in the beginning and 76.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:27:07,173 INFO L168 Benchmark]: TraceAbstraction took 32976.66 ms. Allocated memory was 113.2 MB in the beginning and 205.5 MB in the end (delta: 92.3 MB). Free memory was 76.2 MB in the beginning and 125.7 MB in the end (delta: -49.5 MB). Peak memory consumption was 46.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:27:07,174 INFO L168 Benchmark]: Witness Printer took 65.25 ms. Allocated memory is still 205.5 MB. Free memory was 125.7 MB in the beginning and 122.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:27:07,176 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 113.2 MB. Free memory is still 90.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 205.30 ms. Allocated memory is still 113.2 MB. Free memory was 73.7 MB in the beginning and 89.3 MB in the end (delta: -15.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.38 ms. Allocated memory is still 113.2 MB. Free memory was 89.3 MB in the beginning and 87.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 296.41 ms. Allocated memory is still 113.2 MB. Free memory was 87.6 MB in the beginning and 76.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 32976.66 ms. Allocated memory was 113.2 MB in the beginning and 205.5 MB in the end (delta: 92.3 MB). Free memory was 76.2 MB in the beginning and 125.7 MB in the end (delta: -49.5 MB). Peak memory consumption was 46.1 MB. Max. memory is 16.1 GB. * Witness Printer took 65.25 ms. Allocated memory is still 205.5 MB. Free memory was 125.7 MB in the beginning and 122.8 MB in the end (delta: 2.9 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, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 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: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 26]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 29]: 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: 32917.3ms, OverallIterations: 25, TraceHistogramMax: 26, EmptinessCheckTime: 38.8ms, AutomataDifference: 6285.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 621 SDtfs, 1822 SDslu, 2190 SDs, 0 SdLazy, 2869 SolverSat, 299 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2066.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1981 GetRequests, 1547 SyntacticMatches, 16 SemanticMatches, 418 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 6900.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=24, InterpolantAutomatonStates: 221, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 138.7ms AutomataMinimizationTime, 25 MinimizatonAttempts, 132 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 278.9ms SsaConstructionTime, 927.4ms SatisfiabilityAnalysisTime, 15228.9ms InterpolantComputationTime, 3239 NumberOfCodeBlocks, 2689 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 3195 ConstructedInterpolants, 462 QuantifiedInterpolants, 20385 SizeOfPredicates, 29 NumberOfNonLiveVariables, 3127 ConjunctsInSsa, 170 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! [2021-10-21 19:27:07,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45fe1919-b077-4249-be69-a7e09caa1c51/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...