./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX --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 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:36:13,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:36:13,025 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:36:13,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:36:13,077 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:36:13,082 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:36:13,085 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:36:13,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:36:13,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:36:13,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:36:13,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:36:13,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:36:13,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:36:13,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:36:13,113 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:36:13,119 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:36:13,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:36:13,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:36:13,125 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:36:13,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:36:13,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:36:13,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:36:13,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:36:13,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:36:13,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:36:13,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:36:13,159 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:36:13,162 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:36:13,163 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:36:13,164 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:36:13,166 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:36:13,167 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:36:13,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:36:13,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:36:13,173 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:36:13,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:36:13,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:36:13,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:36:13,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:36:13,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:36:13,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:36:13,179 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 09:36:13,237 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:36:13,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:36:13,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:36:13,238 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:36:13,239 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:36:13,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:36:13,240 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:36:13,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:36:13,241 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:36:13,241 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 09:36:13,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:36:13,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:36:13,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:36:13,243 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 09:36:13,243 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 09:36:13,243 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 09:36:13,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:36:13,244 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 09:36:13,244 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:36:13,244 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:36:13,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:36:13,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:36:13,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:36:13,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:36:13,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:36:13,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:36:13,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:36:13,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:36:13,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:36:13,248 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_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2021-11-09 09:36:13,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:36:13,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:36:13,661 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:36:13,662 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:36:13,663 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:36:13,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2021-11-09 09:36:13,749 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/data/7b0d76c42/95b5e277d2a043e9bcd0e317fb112ab0/FLAG2e247927b [2021-11-09 09:36:14,410 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:36:14,411 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2021-11-09 09:36:14,425 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/data/7b0d76c42/95b5e277d2a043e9bcd0e317fb112ab0/FLAG2e247927b [2021-11-09 09:36:14,770 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/data/7b0d76c42/95b5e277d2a043e9bcd0e317fb112ab0 [2021-11-09 09:36:14,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:36:14,780 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 09:36:14,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:36:14,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:36:14,791 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:36:14,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:36:14" (1/1) ... [2021-11-09 09:36:14,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39bb08a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:14, skipping insertion in model container [2021-11-09 09:36:14,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:36:14" (1/1) ... [2021-11-09 09:36:14,805 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:36:14,823 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:36:15,140 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:36:15,151 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:36:15,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:36:15,201 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:36:15,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:15 WrapperNode [2021-11-09 09:36:15,203 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:36:15,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:36:15,205 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:36:15,205 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:36:15,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:15" (1/1) ... [2021-11-09 09:36:15,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:15" (1/1) ... [2021-11-09 09:36:15,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:15" (1/1) ... [2021-11-09 09:36:15,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:15" (1/1) ... [2021-11-09 09:36:15,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:15" (1/1) ... [2021-11-09 09:36:15,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:15" (1/1) ... [2021-11-09 09:36:15,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:15" (1/1) ... [2021-11-09 09:36:15,276 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:36:15,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:36:15,279 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:36:15,279 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:36:15,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:15" (1/1) ... [2021-11-09 09:36:15,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:36:15,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:15,327 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:36:15,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:36:15,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 09:36:15,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:36:15,396 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-11-09 09:36:15,396 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 09:36:15,397 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-11-09 09:36:15,397 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:36:15,397 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 09:36:15,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:36:15,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:36:15,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:36:15,399 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 09:36:15,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:36:15,801 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:36:15,801 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-09 09:36:15,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:36:15 BoogieIcfgContainer [2021-11-09 09:36:15,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:36:15,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:36:15,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:36:15,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:36:15,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:36:14" (1/3) ... [2021-11-09 09:36:15,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c83644c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:36:15, skipping insertion in model container [2021-11-09 09:36:15,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:36:15" (2/3) ... [2021-11-09 09:36:15,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c83644c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:36:15, skipping insertion in model container [2021-11-09 09:36:15,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:36:15" (3/3) ... [2021-11-09 09:36:15,828 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2021-11-09 09:36:15,833 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:36:15,848 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2021-11-09 09:36:15,901 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:36:15,910 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 [2021-11-09 09:36:15,910 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-11-09 09:36:15,929 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) [2021-11-09 09:36:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 09:36:15,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:15,940 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:15,941 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:15,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:15,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1909189377, now seen corresponding path program 1 times [2021-11-09 09:36:15,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:15,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807171897] [2021-11-09 09:36:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:15,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:16,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:16,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:16,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807171897] [2021-11-09 09:36:16,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807171897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:16,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:16,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:36:16,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409204684] [2021-11-09 09:36:16,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:16,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:16,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:16,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:16,356 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) [2021-11-09 09:36:16,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:16,578 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-11-09 09:36:16,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:36:16,580 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 [2021-11-09 09:36:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:16,591 INFO L225 Difference]: With dead ends: 58 [2021-11-09 09:36:16,591 INFO L226 Difference]: Without dead ends: 54 [2021-11-09 09:36:16,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:16,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-09 09:36:16,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-11-09 09:36:16,647 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) [2021-11-09 09:36:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-11-09 09:36:16,651 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 10 [2021-11-09 09:36:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:16,651 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-11-09 09:36:16,652 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) [2021-11-09 09:36:16,652 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-11-09 09:36:16,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 09:36:16,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:16,653 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:16,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:36:16,654 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:16,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:16,655 INFO L85 PathProgramCache]: Analyzing trace with hash -941983064, now seen corresponding path program 1 times [2021-11-09 09:36:16,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:16,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959949141] [2021-11-09 09:36:16,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:16,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:16,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:16,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:16,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959949141] [2021-11-09 09:36:16,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959949141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:16,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:16,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 09:36:16,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496883640] [2021-11-09 09:36:16,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:16,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:16,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:16,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:36:16,743 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) [2021-11-09 09:36:16,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:16,936 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2021-11-09 09:36:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:16,937 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 [2021-11-09 09:36:16,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:16,941 INFO L225 Difference]: With dead ends: 49 [2021-11-09 09:36:16,941 INFO L226 Difference]: Without dead ends: 49 [2021-11-09 09:36:16,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:16,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-09 09:36:16,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2021-11-09 09:36:16,949 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) [2021-11-09 09:36:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-09 09:36:16,951 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 11 [2021-11-09 09:36:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:16,952 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-09 09:36:16,952 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) [2021-11-09 09:36:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-09 09:36:16,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:36:16,954 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:16,954 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:16,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:36:16,955 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting fooErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:16,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:16,956 INFO L85 PathProgramCache]: Analyzing trace with hash 863296133, now seen corresponding path program 1 times [2021-11-09 09:36:16,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:16,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026397657] [2021-11-09 09:36:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:16,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:17,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:17,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:17,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:17,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026397657] [2021-11-09 09:36:17,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026397657] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:17,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:17,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:36:17,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677872632] [2021-11-09 09:36:17,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:36:17,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:17,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:36:17,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:36:17,051 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) [2021-11-09 09:36:17,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:17,248 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-11-09 09:36:17,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:36:17,249 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 [2021-11-09 09:36:17,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:17,250 INFO L225 Difference]: With dead ends: 40 [2021-11-09 09:36:17,251 INFO L226 Difference]: Without dead ends: 40 [2021-11-09 09:36:17,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:36:17,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-09 09:36:17,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-09 09:36:17,257 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) [2021-11-09 09:36:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-11-09 09:36:17,259 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 12 [2021-11-09 09:36:17,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:17,260 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-11-09 09:36:17,260 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) [2021-11-09 09:36:17,261 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-11-09 09:36:17,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 09:36:17,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:17,262 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:17,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:36:17,263 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:17,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:17,264 INFO L85 PathProgramCache]: Analyzing trace with hash 863296134, now seen corresponding path program 1 times [2021-11-09 09:36:17,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:17,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105906830] [2021-11-09 09:36:17,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:17,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:17,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:17,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:17,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:17,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:17,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105906830] [2021-11-09 09:36:17,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105906830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:17,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:17,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:36:17,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167940629] [2021-11-09 09:36:17,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:36:17,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:17,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:36:17,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:36:17,393 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) [2021-11-09 09:36:17,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:17,584 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2021-11-09 09:36:17,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:36:17,584 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 [2021-11-09 09:36:17,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:17,586 INFO L225 Difference]: With dead ends: 46 [2021-11-09 09:36:17,586 INFO L226 Difference]: Without dead ends: 46 [2021-11-09 09:36:17,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:36:17,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-09 09:36:17,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-11-09 09:36:17,593 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) [2021-11-09 09:36:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-11-09 09:36:17,595 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 12 [2021-11-09 09:36:17,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:17,595 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-11-09 09:36:17,596 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) [2021-11-09 09:36:17,596 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-11-09 09:36:17,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 09:36:17,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:17,597 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:17,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:36:17,598 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:17,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:17,599 INFO L85 PathProgramCache]: Analyzing trace with hash 143250926, now seen corresponding path program 1 times [2021-11-09 09:36:17,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:17,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393264787] [2021-11-09 09:36:17,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:17,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:17,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:17,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:17,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:17,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:17,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393264787] [2021-11-09 09:36:17,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393264787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:17,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:17,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:36:17,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205120182] [2021-11-09 09:36:17,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:36:17,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:17,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:36:17,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:36:17,719 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-09 09:36:17,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:17,886 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-11-09 09:36:17,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:36:17,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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 15 [2021-11-09 09:36:17,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:17,888 INFO L225 Difference]: With dead ends: 61 [2021-11-09 09:36:17,889 INFO L226 Difference]: Without dead ends: 61 [2021-11-09 09:36:17,889 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:36:17,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-09 09:36:17,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2021-11-09 09:36:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 39 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-09 09:36:17,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-11-09 09:36:17,899 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 15 [2021-11-09 09:36:17,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:17,899 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-11-09 09:36:17,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-09 09:36:17,900 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-11-09 09:36:17,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-09 09:36:17,901 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:17,901 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:17,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:36:17,902 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:17,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:17,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1623425863, now seen corresponding path program 1 times [2021-11-09 09:36:17,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:17,903 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047839002] [2021-11-09 09:36:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:17,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:17,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:17,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:17,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047839002] [2021-11-09 09:36:17,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047839002] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:17,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227775733] [2021-11-09 09:36:17,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:17,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:17,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:18,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:18,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:36:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:18,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 09:36:18,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:18,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227775733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:18,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:18,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-11-09 09:36:18,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250302193] [2021-11-09 09:36:18,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:36:18,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:18,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:36:18,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:18,229 INFO L87 Difference]: Start difference. First operand 45 states and 50 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) [2021-11-09 09:36:18,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:18,363 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2021-11-09 09:36:18,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:36:18,364 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 [2021-11-09 09:36:18,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:18,369 INFO L225 Difference]: With dead ends: 56 [2021-11-09 09:36:18,369 INFO L226 Difference]: Without dead ends: 56 [2021-11-09 09:36:18,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:36:18,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-09 09:36:18,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2021-11-09 09:36:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 43 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-09 09:36:18,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-11-09 09:36:18,392 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 16 [2021-11-09 09:36:18,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:18,393 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-11-09 09:36:18,394 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) [2021-11-09 09:36:18,394 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-11-09 09:36:18,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 09:36:18,396 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:18,396 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:18,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:18,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-09 09:36:18,613 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting fooErr2REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:18,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:18,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1213405753, now seen corresponding path program 1 times [2021-11-09 09:36:18,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:18,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356920635] [2021-11-09 09:36:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:18,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:18,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:36:18,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:18,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356920635] [2021-11-09 09:36:18,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356920635] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:18,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:18,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:36:18,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215583783] [2021-11-09 09:36:18,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:36:18,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:18,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:36:18,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:36:18,828 INFO L87 Difference]: Start difference. First operand 49 states and 55 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) [2021-11-09 09:36:19,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:19,018 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-11-09 09:36:19,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:36:19,019 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 [2021-11-09 09:36:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:19,021 INFO L225 Difference]: With dead ends: 48 [2021-11-09 09:36:19,021 INFO L226 Difference]: Without dead ends: 48 [2021-11-09 09:36:19,022 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:36:19,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-09 09:36:19,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-09 09:36:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 42 states have internal predecessors, (46), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-09 09:36:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2021-11-09 09:36:19,046 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 17 [2021-11-09 09:36:19,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:19,047 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2021-11-09 09:36:19,048 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) [2021-11-09 09:36:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2021-11-09 09:36:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 09:36:19,049 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:19,049 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:19,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 09:36:19,052 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:19,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:19,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2121234189, now seen corresponding path program 1 times [2021-11-09 09:36:19,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:19,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375033884] [2021-11-09 09:36:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:19,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:19,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:19,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:19,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:19,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:19,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375033884] [2021-11-09 09:36:19,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375033884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:19,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402758422] [2021-11-09 09:36:19,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:19,221 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:19,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:19,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:19,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:36:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:19,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:36:19,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:19,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402758422] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:19,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:19,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-11-09 09:36:19,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438797906] [2021-11-09 09:36:19,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:36:19,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:19,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:36:19,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:36:19,505 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:19,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:19,754 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-11-09 09:36:19,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:36:19,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2021-11-09 09:36:19,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:19,759 INFO L225 Difference]: With dead ends: 68 [2021-11-09 09:36:19,760 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 09:36:19,761 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:36:19,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 09:36:19,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 44. [2021-11-09 09:36:19,774 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) [2021-11-09 09:36:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-11-09 09:36:19,779 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 20 [2021-11-09 09:36:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:19,779 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-11-09 09:36:19,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:19,780 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-11-09 09:36:19,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-09 09:36:19,780 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:19,781 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:19,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:20,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:20,013 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:20,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:20,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1483602424, now seen corresponding path program 2 times [2021-11-09 09:36:20,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:20,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622294301] [2021-11-09 09:36:20,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:20,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:20,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:20,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:20,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622294301] [2021-11-09 09:36:20,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622294301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:20,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351455516] [2021-11-09 09:36:20,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:36:20,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:20,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:20,141 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:20,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:36:20,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:36:20,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:20,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:36:20,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:36:20,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351455516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:20,401 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:20,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-11-09 09:36:20,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509252506] [2021-11-09 09:36:20,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:36:20,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:20,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:36:20,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:36:20,405 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 3 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) [2021-11-09 09:36:20,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:20,731 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2021-11-09 09:36:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:36:20,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 3 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 [2021-11-09 09:36:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:20,733 INFO L225 Difference]: With dead ends: 74 [2021-11-09 09:36:20,733 INFO L226 Difference]: Without dead ends: 74 [2021-11-09 09:36:20,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:36:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-09 09:36:20,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2021-11-09 09:36:20,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 53 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:20,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-11-09 09:36:20,739 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 21 [2021-11-09 09:36:20,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:20,739 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-11-09 09:36:20,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 3 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) [2021-11-09 09:36:20,740 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-11-09 09:36:20,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:36:20,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:20,741 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:20,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:20,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:20,942 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:20,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:20,942 INFO L85 PathProgramCache]: Analyzing trace with hash -523456178, now seen corresponding path program 2 times [2021-11-09 09:36:20,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:20,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283319555] [2021-11-09 09:36:20,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:20,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:21,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:21,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:21,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:21,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:21,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283319555] [2021-11-09 09:36:21,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283319555] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:21,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095764687] [2021-11-09 09:36:21,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:36:21,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:21,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:21,061 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:21,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:36:21,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-09 09:36:21,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:21,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 09:36:21,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:21,227 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 09:36:21,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 09:36:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:36:22,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095764687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:22,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:36:22,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-11-09 09:36:22,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124732335] [2021-11-09 09:36:22,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:36:22,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:22,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:36:22,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:36:22,143 INFO L87 Difference]: Start difference. First operand 60 states and 63 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) [2021-11-09 09:36:22,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:22,190 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-11-09 09:36:22,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:22,191 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 [2021-11-09 09:36:22,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:22,193 INFO L225 Difference]: With dead ends: 58 [2021-11-09 09:36:22,193 INFO L226 Difference]: Without dead ends: 58 [2021-11-09 09:36:22,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:36:22,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-09 09:36:22,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-09 09:36:22,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.148936170212766) internal successors, (54), 51 states have internal predecessors, (54), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-11-09 09:36:22,209 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 25 [2021-11-09 09:36:22,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:22,214 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-11-09 09:36:22,215 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) [2021-11-09 09:36:22,215 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-11-09 09:36:22,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:36:22,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:22,217 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:22,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:22,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:36:22,418 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:22,419 INFO L85 PathProgramCache]: Analyzing trace with hash -523456177, now seen corresponding path program 1 times [2021-11-09 09:36:22,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:22,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115556589] [2021-11-09 09:36:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:22,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:22,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:22,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:22,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:36:22,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:22,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115556589] [2021-11-09 09:36:22,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115556589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:22,563 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:36:22,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:36:22,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477589698] [2021-11-09 09:36:22,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 09:36:22,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:22,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 09:36:22,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:22,565 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:36:22,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:22,640 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-11-09 09:36:22,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:36:22,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-11-09 09:36:22,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:22,642 INFO L225 Difference]: With dead ends: 62 [2021-11-09 09:36:22,642 INFO L226 Difference]: Without dead ends: 62 [2021-11-09 09:36:22,642 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:36:22,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-09 09:36:22,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-11-09 09:36:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 52 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-11-09 09:36:22,654 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 25 [2021-11-09 09:36:22,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:22,657 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-11-09 09:36:22,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:36:22,657 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-11-09 09:36:22,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-09 09:36:22,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:22,664 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:22,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 09:36:22,664 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:22,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2020089664, now seen corresponding path program 1 times [2021-11-09 09:36:22,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:22,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076976377] [2021-11-09 09:36:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:22,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:22,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:22,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:36:22,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:22,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076976377] [2021-11-09 09:36:22,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076976377] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:22,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591491479] [2021-11-09 09:36:22,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:22,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:22,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:22,829 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:22,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:36:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:22,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:36:22,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:36:23,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591491479] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:23,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:23,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-11-09 09:36:23,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546169823] [2021-11-09 09:36:23,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:36:23,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:23,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:36:23,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:36:23,156 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:23,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:23,303 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-11-09 09:36:23,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 09:36:23,304 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2021-11-09 09:36:23,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:23,305 INFO L225 Difference]: With dead ends: 66 [2021-11-09 09:36:23,306 INFO L226 Difference]: Without dead ends: 66 [2021-11-09 09:36:23,306 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:36:23,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-09 09:36:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2021-11-09 09:36:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.14) internal successors, (57), 53 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:23,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2021-11-09 09:36:23,310 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 31 [2021-11-09 09:36:23,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:23,311 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2021-11-09 09:36:23,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:23,311 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2021-11-09 09:36:23,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-09 09:36:23,313 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:23,313 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:23,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:23,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:23,529 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr4ENSURES_VIOLATIONMEMORY_LEAK === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:23,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:23,529 INFO L85 PathProgramCache]: Analyzing trace with hash -590570264, now seen corresponding path program 1 times [2021-11-09 09:36:23,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:23,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049722710] [2021-11-09 09:36:23,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:23,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:23,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:23,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:23,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:23,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:36:23,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:23,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049722710] [2021-11-09 09:36:23,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049722710] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:23,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314087576] [2021-11-09 09:36:23,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:23,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:23,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:23,633 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:23,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:36:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:23,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:36:23,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:23,864 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-09 09:36:23,864 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 [2021-11-09 09:36:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 09:36:24,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314087576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:24,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:36:24,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-11-09 09:36:24,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452434704] [2021-11-09 09:36:24,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:36:24,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:24,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:36:24,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:36:24,515 INFO L87 Difference]: Start difference. First operand 61 states and 64 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) [2021-11-09 09:36:24,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:24,612 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2021-11-09 09:36:24,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:36:24,612 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 34 [2021-11-09 09:36:24,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:24,613 INFO L225 Difference]: With dead ends: 60 [2021-11-09 09:36:24,614 INFO L226 Difference]: Without dead ends: 57 [2021-11-09 09:36:24,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:36:24,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-11-09 09:36:24,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-11-09 09:36:24,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 49 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-11-09 09:36:24,618 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 34 [2021-11-09 09:36:24,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:24,618 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-11-09 09:36:24,618 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) [2021-11-09 09:36:24,619 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-11-09 09:36:24,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 09:36:24,620 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:24,620 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:24,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:24,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 09:36:24,821 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:24,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:24,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1127717213, now seen corresponding path program 1 times [2021-11-09 09:36:24,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:24,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589931528] [2021-11-09 09:36:24,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:24,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:24,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:24,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-09 09:36:24,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:24,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589931528] [2021-11-09 09:36:24,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589931528] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:24,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953231548] [2021-11-09 09:36:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:24,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:24,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:24,965 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:24,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:36:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:25,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:36:25,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:25,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-09 09:36:25,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:36:25,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:36:25,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2021-11-09 09:36:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:36:25,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953231548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:25,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:25,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11] total 14 [2021-11-09 09:36:25,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647085690] [2021-11-09 09:36:25,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:36:25,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:25,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:36:25,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:36:25,503 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:25,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:25,832 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2021-11-09 09:36:25,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:36:25,833 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-11-09 09:36:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:25,834 INFO L225 Difference]: With dead ends: 76 [2021-11-09 09:36:25,834 INFO L226 Difference]: Without dead ends: 76 [2021-11-09 09:36:25,835 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:36:25,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-09 09:36:25,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 60. [2021-11-09 09:36:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.1) internal successors, (55), 52 states have internal predecessors, (55), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-11-09 09:36:25,839 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 35 [2021-11-09 09:36:25,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:25,839 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-11-09 09:36:25,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-11-09 09:36:25,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-09 09:36:25,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:25,841 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:25,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:26,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:36:26,065 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:26,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:26,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1710006518, now seen corresponding path program 1 times [2021-11-09 09:36:26,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:26,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919151485] [2021-11-09 09:36:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:26,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 09:36:26,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:26,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919151485] [2021-11-09 09:36:26,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919151485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:26,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713805616] [2021-11-09 09:36:26,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:26,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:26,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:26,166 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:26,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:36:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:36:26,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-09 09:36:26,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713805616] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:26,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:26,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-11-09 09:36:26,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598998203] [2021-11-09 09:36:26,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:36:26,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:26,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:36:26,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:36:26,558 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:36:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:26,685 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2021-11-09 09:36:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:36:26,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2021-11-09 09:36:26,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:26,687 INFO L225 Difference]: With dead ends: 71 [2021-11-09 09:36:26,688 INFO L226 Difference]: Without dead ends: 71 [2021-11-09 09:36:26,688 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:36:26,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-09 09:36:26,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2021-11-09 09:36:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 57 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:26,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-11-09 09:36:26,692 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 42 [2021-11-09 09:36:26,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:26,693 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-11-09 09:36:26,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:36:26,694 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-11-09 09:36:26,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 09:36:26,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:26,695 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:26,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:26,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:26,909 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:26,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:26,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1860847279, now seen corresponding path program 1 times [2021-11-09 09:36:26,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:26,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505518723] [2021-11-09 09:36:26,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:26,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:26,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:36:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 30 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 09:36:27,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:27,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505518723] [2021-11-09 09:36:27,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505518723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:27,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448204360] [2021-11-09 09:36:27,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:27,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:27,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:27,055 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:27,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:36:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:27,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:36:27,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 09:36:27,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448204360] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:27,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:27,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-11-09 09:36:27,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122957886] [2021-11-09 09:36:27,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 09:36:27,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:27,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 09:36:27,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:36:27,554 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-09 09:36:27,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:27,892 INFO L93 Difference]: Finished difference Result 73 states and 75 transitions. [2021-11-09 09:36:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:36:27,893 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2021-11-09 09:36:27,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:27,894 INFO L225 Difference]: With dead ends: 73 [2021-11-09 09:36:27,894 INFO L226 Difference]: Without dead ends: 70 [2021-11-09 09:36:27,895 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:36:27,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-09 09:36:27,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2021-11-09 09:36:27,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 57 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-11-09 09:36:27,899 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 46 [2021-11-09 09:36:27,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:27,899 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-11-09 09:36:27,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-09 09:36:27,900 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-11-09 09:36:27,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-09 09:36:27,900 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:27,900 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:27,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:28,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:36:28,101 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:28,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:28,102 INFO L85 PathProgramCache]: Analyzing trace with hash -374076379, now seen corresponding path program 2 times [2021-11-09 09:36:28,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:28,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506147514] [2021-11-09 09:36:28,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:28,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:28,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:28,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:28,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 49 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:36:28,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:28,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506147514] [2021-11-09 09:36:28,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506147514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:28,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789556647] [2021-11-09 09:36:28,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:36:28,224 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:28,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:28,225 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:28,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:36:28,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:36:28,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:28,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:36:28,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-09 09:36:28,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789556647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:28,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:28,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-11-09 09:36:28,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379897933] [2021-11-09 09:36:28,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:36:28,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:28,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:36:28,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:36:28,816 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 13 states have internal predecessors, (60), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:29,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:29,131 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2021-11-09 09:36:29,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:36:29,132 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 13 states have internal predecessors, (60), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2021-11-09 09:36:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:29,133 INFO L225 Difference]: With dead ends: 98 [2021-11-09 09:36:29,133 INFO L226 Difference]: Without dead ends: 98 [2021-11-09 09:36:29,134 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:36:29,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-09 09:36:29,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 86. [2021-11-09 09:36:29,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 77 states have internal predecessors, (79), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-09 09:36:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2021-11-09 09:36:29,138 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 47 [2021-11-09 09:36:29,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:29,139 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2021-11-09 09:36:29,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 13 states have internal predecessors, (60), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:29,139 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2021-11-09 09:36:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 09:36:29,140 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:29,140 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:29,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:29,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:29,353 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr1REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:29,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:29,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1743494932, now seen corresponding path program 2 times [2021-11-09 09:36:29,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:29,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853770920] [2021-11-09 09:36:29,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:29,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:29,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:29,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:29,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:36:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-09 09:36:29,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:29,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853770920] [2021-11-09 09:36:29,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853770920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:29,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526437995] [2021-11-09 09:36:29,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:36:29,495 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:29,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:29,500 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:29,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:36:29,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:36:29,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:29,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-09 09:36:29,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:29,827 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 09:36:29,828 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 [2021-11-09 09:36:29,834 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 [2021-11-09 09:36:30,738 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-09 09:36:30,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526437995] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:36:30,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:36:30,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5] total 14 [2021-11-09 09:36:30,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519838527] [2021-11-09 09:36:30,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:36:30,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:30,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:36:30,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:36:30,740 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:30,997 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2021-11-09 09:36:30,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:36:30,998 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 51 [2021-11-09 09:36:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:30,999 INFO L225 Difference]: With dead ends: 87 [2021-11-09 09:36:30,999 INFO L226 Difference]: Without dead ends: 87 [2021-11-09 09:36:31,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:36:31,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-09 09:36:31,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-11-09 09:36:31,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 74 states have (on average 1.054054054054054) internal successors, (78), 76 states have internal predecessors, (78), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-09 09:36:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2021-11-09 09:36:31,004 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 51 [2021-11-09 09:36:31,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:31,004 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2021-11-09 09:36:31,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:36:31,005 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2021-11-09 09:36:31,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-09 09:36:31,005 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:31,005 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:31,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:31,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-09 09:36:31,217 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:31,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:31,217 INFO L85 PathProgramCache]: Analyzing trace with hash -305990144, now seen corresponding path program 2 times [2021-11-09 09:36:31,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:31,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294767311] [2021-11-09 09:36:31,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:31,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:31,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:31,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:31,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:36:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-09 09:36:31,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:31,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294767311] [2021-11-09 09:36:31,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294767311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:31,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338647509] [2021-11-09 09:36:31,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:36:31,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:31,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:31,336 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:31,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:36:31,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:36:31,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:31,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:36:31,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-09 09:36:31,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338647509] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:31,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:31,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-11-09 09:36:31,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924565815] [2021-11-09 09:36:31,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 09:36:31,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:31,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 09:36:31,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:36:31,941 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:36:32,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:32,136 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2021-11-09 09:36:32,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:36:32,137 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 61 [2021-11-09 09:36:32,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:32,138 INFO L225 Difference]: With dead ends: 106 [2021-11-09 09:36:32,138 INFO L226 Difference]: Without dead ends: 106 [2021-11-09 09:36:32,138 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:36:32,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-09 09:36:32,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-11-09 09:36:32,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 84 states have internal predecessors, (87), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-09 09:36:32,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2021-11-09 09:36:32,142 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 61 [2021-11-09 09:36:32,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:32,142 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2021-11-09 09:36:32,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:36:32,143 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2021-11-09 09:36:32,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 09:36:32,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:32,143 INFO L513 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:32,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:32,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:32,344 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:32,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:32,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1240037378, now seen corresponding path program 3 times [2021-11-09 09:36:32,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:32,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560655640] [2021-11-09 09:36:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:32,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:32,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:32,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:32,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:36:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 93 proven. 21 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-09 09:36:32,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:32,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560655640] [2021-11-09 09:36:32,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560655640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:32,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800609392] [2021-11-09 09:36:32,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:36:32,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:32,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:32,461 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:32,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:36:32,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-09 09:36:32,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:32,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 09:36:32,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 104 proven. 13 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-09 09:36:33,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800609392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:33,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:33,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 14 [2021-11-09 09:36:33,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483795017] [2021-11-09 09:36:33,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:36:33,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:33,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:36:33,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:36:33,076 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-09 09:36:33,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:33,570 INFO L93 Difference]: Finished difference Result 149 states and 154 transitions. [2021-11-09 09:36:33,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:36:33,571 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 73 [2021-11-09 09:36:33,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:33,572 INFO L225 Difference]: With dead ends: 149 [2021-11-09 09:36:33,572 INFO L226 Difference]: Without dead ends: 149 [2021-11-09 09:36:33,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:36:33,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-09 09:36:33,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 120. [2021-11-09 09:36:33,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 107 states have (on average 1.0560747663551402) internal successors, (113), 109 states have internal predecessors, (113), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:36:33,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2021-11-09 09:36:33,579 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 73 [2021-11-09 09:36:33,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:33,579 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2021-11-09 09:36:33,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-09 09:36:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2021-11-09 09:36:33,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-09 09:36:33,580 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:33,580 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:33,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:33,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:33,793 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr3REQUIRES_VIOLATION === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:33,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:33,793 INFO L85 PathProgramCache]: Analyzing trace with hash 658566144, now seen corresponding path program 3 times [2021-11-09 09:36:33,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:33,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514004445] [2021-11-09 09:36:33,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:33,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:33,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:33,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:33,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:36:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:33,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:36:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:33,965 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 107 proven. 26 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-09 09:36:33,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:33,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514004445] [2021-11-09 09:36:33,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514004445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:33,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708616273] [2021-11-09 09:36:33,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:36:33,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:33,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:33,968 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:33,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:36:34,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-09 09:36:34,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:34,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 09:36:34,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:34,349 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 09:36:34,350 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 [2021-11-09 09:36:34,357 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 [2021-11-09 09:36:35,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-09 09:36:35,945 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 09:36:35,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 59 [2021-11-09 09:36:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 105 proven. 6 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-11-09 09:36:36,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708616273] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:36,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:36,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 23 [2021-11-09 09:36:36,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767315116] [2021-11-09 09:36:36,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:36:36,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:36,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:36:36,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:36:36,336 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 22 states have internal predecessors, (93), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 09:36:38,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:38,448 INFO L93 Difference]: Finished difference Result 139 states and 142 transitions. [2021-11-09 09:36:38,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-09 09:36:38,448 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 22 states have internal predecessors, (93), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 91 [2021-11-09 09:36:38,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:38,450 INFO L225 Difference]: With dead ends: 139 [2021-11-09 09:36:38,450 INFO L226 Difference]: Without dead ends: 120 [2021-11-09 09:36:38,452 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 83 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=456, Invalid=2850, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 09:36:38,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-09 09:36:38,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 113. [2021-11-09 09:36:38,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 102 states have internal predecessors, (104), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:36:38,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2021-11-09 09:36:38,458 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 91 [2021-11-09 09:36:38,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:38,459 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2021-11-09 09:36:38,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.043478260869565) internal successors, (93), 22 states have internal predecessors, (93), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-11-09 09:36:38,459 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2021-11-09 09:36:38,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-09 09:36:38,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:38,461 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:38,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:38,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:38,673 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:38,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:38,673 INFO L85 PathProgramCache]: Analyzing trace with hash 241027877, now seen corresponding path program 4 times [2021-11-09 09:36:38,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:38,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847657778] [2021-11-09 09:36:38,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:38,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:38,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:38,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:38,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:36:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:38,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:36:38,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-09 09:36:38,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:38,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847657778] [2021-11-09 09:36:38,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847657778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:38,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962558613] [2021-11-09 09:36:38,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:36:38,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:38,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:38,853 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:38,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:36:39,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:36:39,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:39,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:36:39,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-09 09:36:39,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962558613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:39,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:39,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-11-09 09:36:39,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99142319] [2021-11-09 09:36:39,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:36:39,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:39,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:36:39,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:36:39,774 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:36:39,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:39,999 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2021-11-09 09:36:39,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:36:39,999 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 109 [2021-11-09 09:36:40,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:40,001 INFO L225 Difference]: With dead ends: 136 [2021-11-09 09:36:40,001 INFO L226 Difference]: Without dead ends: 136 [2021-11-09 09:36:40,001 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-09 09:36:40,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-09 09:36:40,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 118. [2021-11-09 09:36:40,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 107 states have internal predecessors, (110), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-09 09:36:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2021-11-09 09:36:40,007 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 109 [2021-11-09 09:36:40,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:40,007 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2021-11-09 09:36:40,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:36:40,007 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2021-11-09 09:36:40,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-09 09:36:40,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:40,009 INFO L513 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:40,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:40,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:40,210 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:40,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:40,211 INFO L85 PathProgramCache]: Analyzing trace with hash 220199146, now seen corresponding path program 5 times [2021-11-09 09:36:40,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:40,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999612476] [2021-11-09 09:36:40,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:40,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:40,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:40,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:40,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:36:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:40,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:36:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:40,480 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 303 proven. 45 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-11-09 09:36:40,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:40,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999612476] [2021-11-09 09:36:40,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999612476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:40,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642975669] [2021-11-09 09:36:40,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:36:40,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:40,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:40,483 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:40,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:36:41,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 09:36:41,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:41,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:36:41,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 272 proven. 172 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-09 09:36:41,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642975669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:41,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:41,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 26 [2021-11-09 09:36:41,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194035090] [2021-11-09 09:36:41,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:36:41,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:41,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:36:41,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:36:41,860 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 26 states, 26 states have (on average 4.0) internal successors, (104), 24 states have internal predecessors, (104), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-09 09:36:42,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:42,528 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2021-11-09 09:36:42,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:36:42,529 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 24 states have internal predecessors, (104), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 114 [2021-11-09 09:36:42,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:42,530 INFO L225 Difference]: With dead ends: 169 [2021-11-09 09:36:42,531 INFO L226 Difference]: Without dead ends: 169 [2021-11-09 09:36:42,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=334, Invalid=1472, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 09:36:42,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-09 09:36:42,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2021-11-09 09:36:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 145 states have (on average 1.0344827586206897) internal successors, (150), 146 states have internal predecessors, (150), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-09 09:36:42,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2021-11-09 09:36:42,543 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 114 [2021-11-09 09:36:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:42,544 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2021-11-09 09:36:42,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 24 states have internal predecessors, (104), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-09 09:36:42,545 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2021-11-09 09:36:42,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-11-09 09:36:42,546 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:42,547 INFO L513 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:42,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:42,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:42,781 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:42,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:42,781 INFO L85 PathProgramCache]: Analyzing trace with hash -937043486, now seen corresponding path program 6 times [2021-11-09 09:36:42,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:42,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883972303] [2021-11-09 09:36:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:42,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:42,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:42,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:42,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:36:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:42,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:36:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:42,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:36:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 622 proven. 48 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2021-11-09 09:36:43,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:43,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883972303] [2021-11-09 09:36:43,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883972303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:43,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456803635] [2021-11-09 09:36:43,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:36:43,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:43,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:43,068 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:43,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:36:43,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-09 09:36:43,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:43,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:36:43,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 396 proven. 49 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2021-11-09 09:36:44,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456803635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:44,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:44,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-11-09 09:36:44,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722727751] [2021-11-09 09:36:44,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 09:36:44,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:44,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 09:36:44,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-11-09 09:36:44,477 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 21 states have internal predecessors, (99), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-09 09:36:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:45,596 INFO L93 Difference]: Finished difference Result 219 states and 223 transitions. [2021-11-09 09:36:45,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 09:36:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 21 states have internal predecessors, (99), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 145 [2021-11-09 09:36:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:45,599 INFO L225 Difference]: With dead ends: 219 [2021-11-09 09:36:45,599 INFO L226 Difference]: Without dead ends: 210 [2021-11-09 09:36:45,601 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 09:36:45,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-09 09:36:45,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 195. [2021-11-09 09:36:45,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 179 states have (on average 1.0223463687150838) internal successors, (183), 180 states have internal predecessors, (183), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-09 09:36:45,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2021-11-09 09:36:45,610 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 145 [2021-11-09 09:36:45,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:45,611 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2021-11-09 09:36:45,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 21 states have internal predecessors, (99), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-09 09:36:45,612 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2021-11-09 09:36:45,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-09 09:36:45,615 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:45,615 INFO L513 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:45,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:45,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:45,821 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:45,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:45,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1055653604, now seen corresponding path program 7 times [2021-11-09 09:36:45,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:45,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625064628] [2021-11-09 09:36:45,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:45,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:45,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:45,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:45,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:36:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:36:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:36:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:36:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1678 backedges. 998 proven. 75 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2021-11-09 09:36:46,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:46,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625064628] [2021-11-09 09:36:46,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625064628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:46,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570634906] [2021-11-09 09:36:46,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:36:46,200 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:46,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:46,201 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:46,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:36:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:47,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 09:36:47,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1678 backedges. 1018 proven. 55 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2021-11-09 09:36:47,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570634906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:47,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:47,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 22 [2021-11-09 09:36:47,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752296102] [2021-11-09 09:36:47,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:36:47,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:47,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:36:47,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:36:47,945 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 21 states have internal predecessors, (108), 8 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-09 09:36:48,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:48,527 INFO L93 Difference]: Finished difference Result 222 states and 225 transitions. [2021-11-09 09:36:48,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:36:48,528 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 21 states have internal predecessors, (108), 8 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 186 [2021-11-09 09:36:48,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:48,530 INFO L225 Difference]: With dead ends: 222 [2021-11-09 09:36:48,531 INFO L226 Difference]: Without dead ends: 216 [2021-11-09 09:36:48,532 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=900, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 09:36:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-09 09:36:48,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 204. [2021-11-09 09:36:48,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 189 states have internal predecessors, (192), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-09 09:36:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 207 transitions. [2021-11-09 09:36:48,557 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 207 transitions. Word has length 186 [2021-11-09 09:36:48,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:48,558 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 207 transitions. [2021-11-09 09:36:48,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 21 states have internal predecessors, (108), 8 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-09 09:36:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 207 transitions. [2021-11-09 09:36:48,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-09 09:36:48,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:48,562 INFO L513 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:48,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:48,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 09:36:48,789 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:48,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1444022939, now seen corresponding path program 8 times [2021-11-09 09:36:48,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:48,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276413012] [2021-11-09 09:36:48,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:48,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:48,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:48,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:48,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:36:48,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:48,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:36:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:48,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:36:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:48,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:36:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 570 proven. 60 refuted. 0 times theorem prover too weak. 1175 trivial. 0 not checked. [2021-11-09 09:36:48,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:48,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276413012] [2021-11-09 09:36:48,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276413012] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:48,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832880435] [2021-11-09 09:36:48,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:36:48,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:48,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:48,989 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:49,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:36:50,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:36:50,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:50,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-09 09:36:50,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:50,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1805 backedges. 570 proven. 60 refuted. 0 times theorem prover too weak. 1175 trivial. 0 not checked. [2021-11-09 09:36:50,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832880435] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:50,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:50,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-11-09 09:36:50,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016654101] [2021-11-09 09:36:50,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:36:50,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:50,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:36:50,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:36:50,580 INFO L87 Difference]: Start difference. First operand 204 states and 207 transitions. Second operand has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:36:50,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:50,920 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2021-11-09 09:36:50,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:36:50,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 191 [2021-11-09 09:36:50,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:50,923 INFO L225 Difference]: With dead ends: 215 [2021-11-09 09:36:50,923 INFO L226 Difference]: Without dead ends: 215 [2021-11-09 09:36:50,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:36:50,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-09 09:36:50,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 205. [2021-11-09 09:36:50,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 189 states have (on average 1.0211640211640212) internal successors, (193), 190 states have internal predecessors, (193), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-09 09:36:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2021-11-09 09:36:50,943 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 191 [2021-11-09 09:36:50,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:50,944 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2021-11-09 09:36:50,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.75) internal successors, (46), 8 states have internal predecessors, (46), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:36:50,944 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2021-11-09 09:36:50,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-09 09:36:50,946 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:50,947 INFO L513 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:50,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:51,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:51,147 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:51,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1146107562, now seen corresponding path program 9 times [2021-11-09 09:36:51,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:51,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334300587] [2021-11-09 09:36:51,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:51,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:51,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:51,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:51,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:51,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:36:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:51,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:36:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:51,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:36:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:51,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:36:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1937 backedges. 675 proven. 87 refuted. 0 times theorem prover too weak. 1175 trivial. 0 not checked. [2021-11-09 09:36:51,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:51,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334300587] [2021-11-09 09:36:51,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334300587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:51,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338786308] [2021-11-09 09:36:51,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:36:51,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:51,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:51,413 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:51,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 09:36:52,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-09 09:36:52,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:52,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-09 09:36:52,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1937 backedges. 675 proven. 87 refuted. 0 times theorem prover too weak. 1175 trivial. 0 not checked. [2021-11-09 09:36:53,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338786308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:53,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:53,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-09 09:36:53,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215183441] [2021-11-09 09:36:53,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:36:53,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:53,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:36:53,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:36:53,046 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 18 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:36:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:53,425 INFO L93 Difference]: Finished difference Result 231 states and 236 transitions. [2021-11-09 09:36:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:36:53,426 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 196 [2021-11-09 09:36:53,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:53,428 INFO L225 Difference]: With dead ends: 231 [2021-11-09 09:36:53,428 INFO L226 Difference]: Without dead ends: 231 [2021-11-09 09:36:53,429 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:36:53,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-09 09:36:53,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 210. [2021-11-09 09:36:53,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 194 states have (on average 1.0257731958762886) internal successors, (199), 195 states have internal predecessors, (199), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-09 09:36:53,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 214 transitions. [2021-11-09 09:36:53,438 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 214 transitions. Word has length 196 [2021-11-09 09:36:53,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:53,439 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 214 transitions. [2021-11-09 09:36:53,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:36:53,439 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 214 transitions. [2021-11-09 09:36:53,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-09 09:36:53,442 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:53,443 INFO L513 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:53,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:53,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 09:36:53,665 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:53,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:53,665 INFO L85 PathProgramCache]: Analyzing trace with hash 938276997, now seen corresponding path program 10 times [2021-11-09 09:36:53,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:53,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020130613] [2021-11-09 09:36:53,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:53,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:53,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:53,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:54,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:36:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:54,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:36:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:54,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:36:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:54,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:36:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 873 proven. 101 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2021-11-09 09:36:54,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:54,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020130613] [2021-11-09 09:36:54,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020130613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:54,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310412222] [2021-11-09 09:36:54,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:36:54,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:54,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:54,065 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:54,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 09:36:55,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:36:55,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:55,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:36:55,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:36:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 834 proven. 369 refuted. 0 times theorem prover too weak. 871 trivial. 0 not checked. [2021-11-09 09:36:56,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310412222] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:56,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:36:56,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 31 [2021-11-09 09:36:56,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119768965] [2021-11-09 09:36:56,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 09:36:56,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:36:56,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 09:36:56,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:36:56,097 INFO L87 Difference]: Start difference. First operand 210 states and 214 transitions. Second operand has 31 states, 31 states have (on average 4.32258064516129) internal successors, (134), 29 states have internal predecessors, (134), 7 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-09 09:36:57,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:36:57,182 INFO L93 Difference]: Finished difference Result 274 states and 279 transitions. [2021-11-09 09:36:57,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 09:36:57,183 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.32258064516129) internal successors, (134), 29 states have internal predecessors, (134), 7 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 201 [2021-11-09 09:36:57,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:36:57,184 INFO L225 Difference]: With dead ends: 274 [2021-11-09 09:36:57,185 INFO L226 Difference]: Without dead ends: 274 [2021-11-09 09:36:57,186 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=484, Invalid=2168, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 09:36:57,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-11-09 09:36:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 261. [2021-11-09 09:36:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 243 states have (on average 1.0246913580246915) internal successors, (249), 244 states have internal predecessors, (249), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-09 09:36:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 266 transitions. [2021-11-09 09:36:57,215 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 266 transitions. Word has length 201 [2021-11-09 09:36:57,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:36:57,216 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 266 transitions. [2021-11-09 09:36:57,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.32258064516129) internal successors, (134), 29 states have internal predecessors, (134), 7 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-11-09 09:36:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 266 transitions. [2021-11-09 09:36:57,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-09 09:36:57,223 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:36:57,223 INFO L513 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:36:57,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 09:36:57,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 09:36:57,437 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:36:57,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:36:57,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1428696967, now seen corresponding path program 11 times [2021-11-09 09:36:57,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:36:57,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340102401] [2021-11-09 09:36:57,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:36:57,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:36:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:57,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:36:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:57,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:36:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:57,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:36:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:57,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:36:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:57,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:36:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:57,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:36:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:57,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:36:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:36:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3093 backedges. 1762 proven. 107 refuted. 0 times theorem prover too weak. 1224 trivial. 0 not checked. [2021-11-09 09:36:57,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:36:57,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340102401] [2021-11-09 09:36:57,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340102401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:36:57,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889423902] [2021-11-09 09:36:57,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:36:57,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:36:57,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:36:57,810 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:36:57,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 09:36:59,036 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-09 09:36:59,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:36:59,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-09 09:36:59,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:00,093 INFO L134 CoverageAnalysis]: Checked inductivity of 3093 backedges. 1729 proven. 456 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-11-09 09:37:00,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889423902] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:00,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:00,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 29 [2021-11-09 09:37:00,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857444166] [2021-11-09 09:37:00,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-09 09:37:00,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:00,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-09 09:37:00,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-11-09 09:37:00,096 INFO L87 Difference]: Start difference. First operand 261 states and 266 transitions. Second operand has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 28 states have internal predecessors, (142), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-09 09:37:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:01,096 INFO L93 Difference]: Finished difference Result 276 states and 279 transitions. [2021-11-09 09:37:01,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 09:37:01,097 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 28 states have internal predecessors, (142), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 242 [2021-11-09 09:37:01,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:01,099 INFO L225 Difference]: With dead ends: 276 [2021-11-09 09:37:01,100 INFO L226 Difference]: Without dead ends: 270 [2021-11-09 09:37:01,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=440, Invalid=1630, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 09:37:01,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-11-09 09:37:01,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 261. [2021-11-09 09:37:01,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 243 states have (on average 1.0164609053497942) internal successors, (247), 244 states have internal predecessors, (247), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-09 09:37:01,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 264 transitions. [2021-11-09 09:37:01,117 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 264 transitions. Word has length 242 [2021-11-09 09:37:01,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:01,118 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 264 transitions. [2021-11-09 09:37:01,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.896551724137931) internal successors, (142), 28 states have internal predecessors, (142), 8 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-09 09:37:01,119 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 264 transitions. [2021-11-09 09:37:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-09 09:37:01,121 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:01,121 INFO L513 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:01,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:01,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 09:37:01,349 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:37:01,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:01,349 INFO L85 PathProgramCache]: Analyzing trace with hash -300291550, now seen corresponding path program 12 times [2021-11-09 09:37:01,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:01,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846908281] [2021-11-09 09:37:01,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:01,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:01,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:01,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:37:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:01,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:37:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:01,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:37:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:01,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:37:01,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:01,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:37:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:01,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:37:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:01,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:37:01,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3266 backedges. 1047 proven. 119 refuted. 0 times theorem prover too weak. 2100 trivial. 0 not checked. [2021-11-09 09:37:01,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:01,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846908281] [2021-11-09 09:37:01,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846908281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:01,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694519458] [2021-11-09 09:37:01,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:37:01,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:01,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:01,653 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:01,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 09:37:03,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-09 09:37:03,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:03,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-09 09:37:03,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3266 backedges. 1047 proven. 119 refuted. 0 times theorem prover too weak. 2100 trivial. 0 not checked. [2021-11-09 09:37:04,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694519458] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:04,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:04,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-11-09 09:37:04,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667014679] [2021-11-09 09:37:04,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:37:04,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:04,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:37:04,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:37:04,131 INFO L87 Difference]: Start difference. First operand 261 states and 264 transitions. Second operand has 20 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:37:04,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:04,516 INFO L93 Difference]: Finished difference Result 278 states and 282 transitions. [2021-11-09 09:37:04,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 09:37:04,517 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 247 [2021-11-09 09:37:04,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:04,519 INFO L225 Difference]: With dead ends: 278 [2021-11-09 09:37:04,519 INFO L226 Difference]: Without dead ends: 278 [2021-11-09 09:37:04,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:37:04,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-11-09 09:37:04,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 266. [2021-11-09 09:37:04,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 248 states have (on average 1.0201612903225807) internal successors, (253), 249 states have internal predecessors, (253), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-09 09:37:04,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 270 transitions. [2021-11-09 09:37:04,530 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 270 transitions. Word has length 247 [2021-11-09 09:37:04,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:04,531 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 270 transitions. [2021-11-09 09:37:04,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:37:04,532 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 270 transitions. [2021-11-09 09:37:04,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-09 09:37:04,534 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:04,534 INFO L513 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:04,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:04,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:04,735 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:37:04,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:04,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2080329715, now seen corresponding path program 13 times [2021-11-09 09:37:04,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:04,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367437578] [2021-11-09 09:37:04,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:04,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:37:05,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:37:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:37:05,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:37:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:37:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:37:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:37:05,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1314 proven. 138 refuted. 0 times theorem prover too weak. 1992 trivial. 0 not checked. [2021-11-09 09:37:05,137 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:05,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367437578] [2021-11-09 09:37:05,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367437578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:05,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963045319] [2021-11-09 09:37:05,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:37:05,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:05,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:05,141 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:05,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 09:37:06,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:06,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:37:06,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3444 backedges. 1350 proven. 102 refuted. 0 times theorem prover too weak. 1992 trivial. 0 not checked. [2021-11-09 09:37:07,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963045319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:07,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:07,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 30 [2021-11-09 09:37:07,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111867247] [2021-11-09 09:37:07,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 09:37:07,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:07,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 09:37:07,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:37:07,798 INFO L87 Difference]: Start difference. First operand 266 states and 270 transitions. Second operand has 30 states, 30 states have (on average 4.5) internal successors, (135), 28 states have internal predecessors, (135), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-09 09:37:08,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:08,483 INFO L93 Difference]: Finished difference Result 330 states and 335 transitions. [2021-11-09 09:37:08,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:37:08,484 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 4.5) internal successors, (135), 28 states have internal predecessors, (135), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 252 [2021-11-09 09:37:08,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:08,486 INFO L225 Difference]: With dead ends: 330 [2021-11-09 09:37:08,487 INFO L226 Difference]: Without dead ends: 330 [2021-11-09 09:37:08,488 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=522, Invalid=1640, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 09:37:08,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-09 09:37:08,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 317. [2021-11-09 09:37:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 297 states have (on average 1.02020202020202) internal successors, (303), 298 states have internal predecessors, (303), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-09 09:37:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 322 transitions. [2021-11-09 09:37:08,500 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 322 transitions. Word has length 252 [2021-11-09 09:37:08,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:08,501 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 322 transitions. [2021-11-09 09:37:08,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 4.5) internal successors, (135), 28 states have internal predecessors, (135), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-11-09 09:37:08,501 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 322 transitions. [2021-11-09 09:37:08,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-09 09:37:08,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:08,504 INFO L513 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:08,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:08,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:08,733 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:37:08,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:08,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1652634800, now seen corresponding path program 14 times [2021-11-09 09:37:08,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:08,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239358602] [2021-11-09 09:37:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:08,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:08,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:37:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:08,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:37:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:09,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:37:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:09,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:37:09,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:09,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:37:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:09,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:37:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:09,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:37:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:09,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:37:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4942 backedges. 2644 proven. 144 refuted. 0 times theorem prover too weak. 2154 trivial. 0 not checked. [2021-11-09 09:37:09,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:09,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239358602] [2021-11-09 09:37:09,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239358602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:09,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290840942] [2021-11-09 09:37:09,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:37:09,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:09,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:09,258 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:09,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 09:37:10,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:37:10,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:10,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:37:10,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4942 backedges. 2676 proven. 112 refuted. 0 times theorem prover too weak. 2154 trivial. 0 not checked. [2021-11-09 09:37:11,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290840942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:11,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:11,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2021-11-09 09:37:11,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014014697] [2021-11-09 09:37:11,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 09:37:11,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:11,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 09:37:11,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:37:11,706 INFO L87 Difference]: Start difference. First operand 317 states and 322 transitions. Second operand has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 27 states have internal predecessors, (138), 10 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-09 09:37:12,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:12,397 INFO L93 Difference]: Finished difference Result 332 states and 335 transitions. [2021-11-09 09:37:12,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-09 09:37:12,398 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 27 states have internal predecessors, (138), 10 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 298 [2021-11-09 09:37:12,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:12,400 INFO L225 Difference]: With dead ends: 332 [2021-11-09 09:37:12,400 INFO L226 Difference]: Without dead ends: 326 [2021-11-09 09:37:12,401 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 303 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=471, Invalid=1509, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 09:37:12,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-09 09:37:12,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 317. [2021-11-09 09:37:12,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 297 states have (on average 1.0134680134680134) internal successors, (301), 298 states have internal predecessors, (301), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-09 09:37:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 320 transitions. [2021-11-09 09:37:12,411 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 320 transitions. Word has length 298 [2021-11-09 09:37:12,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:12,412 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 320 transitions. [2021-11-09 09:37:12,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.928571428571429) internal successors, (138), 27 states have internal predecessors, (138), 10 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-09 09:37:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 320 transitions. [2021-11-09 09:37:12,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-11-09 09:37:12,415 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:12,416 INFO L513 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:12,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:12,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-09 09:37:12,629 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:37:12,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:12,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1585027973, now seen corresponding path program 15 times [2021-11-09 09:37:12,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:12,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178366338] [2021-11-09 09:37:12,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:12,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:12,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:37:12,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:12,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:37:12,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:12,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:37:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:12,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:37:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:12,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:37:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:12,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:37:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:12,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:37:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:12,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:37:12,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:12,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5161 backedges. 1533 proven. 156 refuted. 0 times theorem prover too weak. 3472 trivial. 0 not checked. [2021-11-09 09:37:12,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:12,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178366338] [2021-11-09 09:37:12,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178366338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:12,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806024705] [2021-11-09 09:37:12,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:37:12,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:12,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:12,953 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:12,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 09:37:14,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-09 09:37:14,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:14,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-09 09:37:14,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:15,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5161 backedges. 1533 proven. 156 refuted. 0 times theorem prover too weak. 3472 trivial. 0 not checked. [2021-11-09 09:37:15,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806024705] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:15,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:15,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-11-09 09:37:15,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067418212] [2021-11-09 09:37:15,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:37:15,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:15,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:37:15,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:37:15,562 INFO L87 Difference]: Start difference. First operand 317 states and 320 transitions. Second operand has 22 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:37:16,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:16,012 INFO L93 Difference]: Finished difference Result 334 states and 338 transitions. [2021-11-09 09:37:16,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:37:16,013 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 303 [2021-11-09 09:37:16,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:16,015 INFO L225 Difference]: With dead ends: 334 [2021-11-09 09:37:16,015 INFO L226 Difference]: Without dead ends: 334 [2021-11-09 09:37:16,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 308 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:37:16,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-09 09:37:16,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 322. [2021-11-09 09:37:16,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 302 states have (on average 1.0165562913907285) internal successors, (307), 303 states have internal predecessors, (307), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-09 09:37:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 326 transitions. [2021-11-09 09:37:16,029 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 326 transitions. Word has length 303 [2021-11-09 09:37:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:16,030 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 326 transitions. [2021-11-09 09:37:16,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.9523809523809526) internal successors, (104), 21 states have internal predecessors, (104), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:37:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 326 transitions. [2021-11-09 09:37:16,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2021-11-09 09:37:16,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:16,034 INFO L513 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:16,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:16,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-09 09:37:16,257 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:37:16,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:16,257 INFO L85 PathProgramCache]: Analyzing trace with hash 699884682, now seen corresponding path program 16 times [2021-11-09 09:37:16,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:16,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317759897] [2021-11-09 09:37:16,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:16,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:37:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:37:16,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:37:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:37:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:37:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:37:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:37:16,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:37:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5385 backedges. 1879 proven. 181 refuted. 0 times theorem prover too weak. 3325 trivial. 0 not checked. [2021-11-09 09:37:16,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:16,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317759897] [2021-11-09 09:37:16,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317759897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:16,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527550773] [2021-11-09 09:37:16,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:37:16,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:16,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:16,762 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:16,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 09:37:18,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:37:18,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:18,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 09:37:18,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:19,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5385 backedges. 1832 proven. 634 refuted. 0 times theorem prover too weak. 2919 trivial. 0 not checked. [2021-11-09 09:37:19,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527550773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:19,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:19,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 37 [2021-11-09 09:37:19,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558449986] [2021-11-09 09:37:19,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 09:37:19,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:19,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 09:37:19,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1094, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:37:19,704 INFO L87 Difference]: Start difference. First operand 322 states and 326 transitions. Second operand has 37 states, 37 states have (on average 4.4324324324324325) internal successors, (164), 35 states have internal predecessors, (164), 9 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-09 09:37:20,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:20,986 INFO L93 Difference]: Finished difference Result 391 states and 396 transitions. [2021-11-09 09:37:20,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 09:37:20,987 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.4324324324324325) internal successors, (164), 35 states have internal predecessors, (164), 9 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 308 [2021-11-09 09:37:20,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:20,989 INFO L225 Difference]: With dead ends: 391 [2021-11-09 09:37:20,990 INFO L226 Difference]: Without dead ends: 391 [2021-11-09 09:37:20,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 308 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=702, Invalid=3080, Unknown=0, NotChecked=0, Total=3782 [2021-11-09 09:37:20,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-09 09:37:21,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 378. [2021-11-09 09:37:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 356 states have (on average 1.0168539325842696) internal successors, (362), 357 states have internal predecessors, (362), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:37:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 383 transitions. [2021-11-09 09:37:21,003 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 383 transitions. Word has length 308 [2021-11-09 09:37:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:21,004 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 383 transitions. [2021-11-09 09:37:21,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.4324324324324325) internal successors, (164), 35 states have internal predecessors, (164), 9 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-09 09:37:21,005 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 383 transitions. [2021-11-09 09:37:21,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-11-09 09:37:21,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:21,008 INFO L513 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 52, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:21,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:21,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 09:37:21,231 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:37:21,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:21,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1109948414, now seen corresponding path program 17 times [2021-11-09 09:37:21,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:21,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621176502] [2021-11-09 09:37:21,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:21,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:21,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:37:21,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:21,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:37:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:21,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:37:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:21,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:37:21,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:21,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:37:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:21,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:37:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:21,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:37:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:21,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:37:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:21,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:37:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7490 backedges. 3774 proven. 186 refuted. 0 times theorem prover too weak. 3530 trivial. 0 not checked. [2021-11-09 09:37:21,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:21,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621176502] [2021-11-09 09:37:21,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621176502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:21,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656957907] [2021-11-09 09:37:21,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:37:21,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:21,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:21,781 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:21,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 09:37:23,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-11-09 09:37:23,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:23,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:37:23,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7490 backedges. 3721 proven. 809 refuted. 0 times theorem prover too weak. 2960 trivial. 0 not checked. [2021-11-09 09:37:25,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656957907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:25,344 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:25,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 35 [2021-11-09 09:37:25,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47157303] [2021-11-09 09:37:25,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 09:37:25,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:25,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 09:37:25,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 09:37:25,347 INFO L87 Difference]: Start difference. First operand 378 states and 383 transitions. Second operand has 35 states, 35 states have (on average 4.914285714285715) internal successors, (172), 34 states have internal predecessors, (172), 10 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-11-09 09:37:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:26,501 INFO L93 Difference]: Finished difference Result 393 states and 396 transitions. [2021-11-09 09:37:26,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 09:37:26,501 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 4.914285714285715) internal successors, (172), 34 states have internal predecessors, (172), 10 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 359 [2021-11-09 09:37:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:26,504 INFO L225 Difference]: With dead ends: 393 [2021-11-09 09:37:26,505 INFO L226 Difference]: Without dead ends: 387 [2021-11-09 09:37:26,506 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 362 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=655, Invalid=2425, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 09:37:26,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-09 09:37:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 378. [2021-11-09 09:37:26,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 356 states have (on average 1.0112359550561798) internal successors, (360), 357 states have internal predecessors, (360), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-11-09 09:37:26,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 381 transitions. [2021-11-09 09:37:26,521 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 381 transitions. Word has length 359 [2021-11-09 09:37:26,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:26,522 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 381 transitions. [2021-11-09 09:37:26,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 4.914285714285715) internal successors, (172), 34 states have internal predecessors, (172), 10 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-11-09 09:37:26,523 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 381 transitions. [2021-11-09 09:37:26,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2021-11-09 09:37:26,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:26,526 INFO L513 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:26,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:26,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 09:37:26,746 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:37:26,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:26,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1526039033, now seen corresponding path program 18 times [2021-11-09 09:37:26,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:26,746 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217569699] [2021-11-09 09:37:26,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:26,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:27,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:37:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:27,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:37:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:27,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:37:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:27,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:37:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:27,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:37:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:27,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:37:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:27,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:37:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:27,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:37:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:27,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:37:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:27,119 INFO L134 CoverageAnalysis]: Checked inductivity of 7760 backedges. 2148 proven. 198 refuted. 0 times theorem prover too weak. 5414 trivial. 0 not checked. [2021-11-09 09:37:27,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:27,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217569699] [2021-11-09 09:37:27,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217569699] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:27,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856388350] [2021-11-09 09:37:27,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:37:27,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:27,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:27,125 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:27,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 09:37:28,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-11-09 09:37:28,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:28,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-09 09:37:28,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:30,173 INFO L134 CoverageAnalysis]: Checked inductivity of 7760 backedges. 2189 proven. 193 refuted. 0 times theorem prover too weak. 5378 trivial. 0 not checked. [2021-11-09 09:37:30,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856388350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:30,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:30,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 26 [2021-11-09 09:37:30,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587548725] [2021-11-09 09:37:30,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 09:37:30,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:30,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 09:37:30,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:37:30,177 INFO L87 Difference]: Start difference. First operand 378 states and 381 transitions. Second operand has 27 states, 26 states have (on average 4.615384615384615) internal successors, (120), 25 states have internal predecessors, (120), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-09 09:37:31,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:31,790 INFO L93 Difference]: Finished difference Result 467 states and 473 transitions. [2021-11-09 09:37:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-09 09:37:31,791 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.615384615384615) internal successors, (120), 25 states have internal predecessors, (120), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 364 [2021-11-09 09:37:31,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:31,794 INFO L225 Difference]: With dead ends: 467 [2021-11-09 09:37:31,794 INFO L226 Difference]: Without dead ends: 467 [2021-11-09 09:37:31,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=306, Invalid=2244, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 09:37:31,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-11-09 09:37:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 439. [2021-11-09 09:37:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 415 states have (on average 1.0144578313253012) internal successors, (421), 416 states have internal predecessors, (421), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-09 09:37:31,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 444 transitions. [2021-11-09 09:37:31,814 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 444 transitions. Word has length 364 [2021-11-09 09:37:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:31,815 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 444 transitions. [2021-11-09 09:37:31,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.615384615384615) internal successors, (120), 25 states have internal predecessors, (120), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2021-11-09 09:37:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 444 transitions. [2021-11-09 09:37:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2021-11-09 09:37:31,819 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:31,820 INFO L513 BasicCegarLoop]: trace histogram [64, 63, 63, 63, 63, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:31,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:32,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-09 09:37:32,041 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:37:32,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:32,041 INFO L85 PathProgramCache]: Analyzing trace with hash 321506027, now seen corresponding path program 19 times [2021-11-09 09:37:32,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:32,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720425854] [2021-11-09 09:37:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:32,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:32,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:37:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:32,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:37:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:32,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:37:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:32,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:37:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:32,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:37:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:32,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:37:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:32,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:37:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:32,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:37:32,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:32,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:37:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:32,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:37:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10890 backedges. 5182 proven. 233 refuted. 0 times theorem prover too weak. 5475 trivial. 0 not checked. [2021-11-09 09:37:32,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:32,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720425854] [2021-11-09 09:37:32,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720425854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:32,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795854536] [2021-11-09 09:37:32,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:37:32,741 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:32,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:32,743 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:32,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 09:37:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:34,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:37:34,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10890 backedges. 5226 proven. 189 refuted. 0 times theorem prover too weak. 5475 trivial. 0 not checked. [2021-11-09 09:37:36,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795854536] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:36,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:36,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 34 [2021-11-09 09:37:36,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860769337] [2021-11-09 09:37:36,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 09:37:36,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:36,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 09:37:36,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 09:37:36,110 INFO L87 Difference]: Start difference. First operand 439 states and 444 transitions. Second operand has 34 states, 34 states have (on average 4.9411764705882355) internal successors, (168), 33 states have internal predecessors, (168), 12 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-09 09:37:36,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:36,956 INFO L93 Difference]: Finished difference Result 463 states and 467 transitions. [2021-11-09 09:37:36,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 09:37:36,956 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.9411764705882355) internal successors, (168), 33 states have internal predecessors, (168), 12 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 425 [2021-11-09 09:37:36,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:36,959 INFO L225 Difference]: With dead ends: 463 [2021-11-09 09:37:36,959 INFO L226 Difference]: Without dead ends: 457 [2021-11-09 09:37:36,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 432 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=696, Invalid=2274, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 09:37:36,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-11-09 09:37:36,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 444. [2021-11-09 09:37:36,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 420 states have (on average 1.0119047619047619) internal successors, (425), 421 states have internal predecessors, (425), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-09 09:37:36,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 448 transitions. [2021-11-09 09:37:36,973 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 448 transitions. Word has length 425 [2021-11-09 09:37:36,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:36,973 INFO L470 AbstractCegarLoop]: Abstraction has 444 states and 448 transitions. [2021-11-09 09:37:36,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.9411764705882355) internal successors, (168), 33 states have internal predecessors, (168), 12 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-09 09:37:36,974 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 448 transitions. [2021-11-09 09:37:36,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-11-09 09:37:36,977 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:36,978 INFO L513 BasicCegarLoop]: trace histogram [65, 64, 64, 64, 64, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:37,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:37,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-09 09:37:37,204 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:37:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash -867500726, now seen corresponding path program 20 times [2021-11-09 09:37:37,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:37,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101674641] [2021-11-09 09:37:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:37,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:37,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:37:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:37,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:37:37,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:37,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:37:37,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:37,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:37:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:37,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:37:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:37,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:37:37,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:37,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:37:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:37,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:37:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:37,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:37:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:37,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:37:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11216 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2021-11-09 09:37:37,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:37,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101674641] [2021-11-09 09:37:37,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101674641] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:37,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324133950] [2021-11-09 09:37:37,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:37:37,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:37,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:37,566 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:37,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 09:37:39,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:37:39,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:39,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 09:37:39,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 11216 backedges. 2907 proven. 245 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2021-11-09 09:37:40,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324133950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:40,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:40,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-11-09 09:37:40,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013235524] [2021-11-09 09:37:40,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:37:40,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:40,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:37:40,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:37:40,666 INFO L87 Difference]: Start difference. First operand 444 states and 448 transitions. Second operand has 14 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:37:41,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:41,293 INFO L93 Difference]: Finished difference Result 473 states and 479 transitions. [2021-11-09 09:37:41,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:37:41,293 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 430 [2021-11-09 09:37:41,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:41,296 INFO L225 Difference]: With dead ends: 473 [2021-11-09 09:37:41,296 INFO L226 Difference]: Without dead ends: 473 [2021-11-09 09:37:41,297 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 448 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:37:41,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-09 09:37:41,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 449. [2021-11-09 09:37:41,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 425 states have (on average 1.0141176470588236) internal successors, (431), 426 states have internal predecessors, (431), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-09 09:37:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 454 transitions. [2021-11-09 09:37:41,311 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 454 transitions. Word has length 430 [2021-11-09 09:37:41,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:41,312 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 454 transitions. [2021-11-09 09:37:41,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 5.461538461538462) internal successors, (71), 13 states have internal predecessors, (71), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:37:41,313 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 454 transitions. [2021-11-09 09:37:41,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2021-11-09 09:37:41,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:41,319 INFO L513 BasicCegarLoop]: trace histogram [66, 65, 65, 65, 65, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:41,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:41,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 09:37:41,534 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:37:41,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:41,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1933224475, now seen corresponding path program 21 times [2021-11-09 09:37:41,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:41,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579261975] [2021-11-09 09:37:41,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:41,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:42,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:37:42,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:42,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:37:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:42,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:37:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:42,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:37:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:42,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:37:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:42,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:37:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:42,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:37:42,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:42,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:37:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:42,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:37:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:42,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:37:42,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 11547 backedges. 3441 proven. 285 refuted. 0 times theorem prover too weak. 7821 trivial. 0 not checked. [2021-11-09 09:37:42,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:42,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579261975] [2021-11-09 09:37:42,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579261975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:42,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951994067] [2021-11-09 09:37:42,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:37:42,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:42,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:42,103 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:42,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 09:37:44,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-09 09:37:44,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:44,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:37:44,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:45,737 INFO L134 CoverageAnalysis]: Checked inductivity of 11547 backedges. 5060 proven. 828 refuted. 0 times theorem prover too weak. 5659 trivial. 0 not checked. [2021-11-09 09:37:45,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951994067] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:45,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:45,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 42 [2021-11-09 09:37:45,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112456915] [2021-11-09 09:37:45,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 09:37:45,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:45,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 09:37:45,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=1479, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 09:37:45,742 INFO L87 Difference]: Start difference. First operand 449 states and 454 transitions. Second operand has 42 states, 42 states have (on average 4.5) internal successors, (189), 40 states have internal predecessors, (189), 11 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-09 09:37:48,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:48,184 INFO L93 Difference]: Finished difference Result 534 states and 539 transitions. [2021-11-09 09:37:48,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-09 09:37:48,185 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.5) internal successors, (189), 40 states have internal predecessors, (189), 11 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 435 [2021-11-09 09:37:48,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:48,189 INFO L225 Difference]: With dead ends: 534 [2021-11-09 09:37:48,189 INFO L226 Difference]: Without dead ends: 534 [2021-11-09 09:37:48,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 438 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1493, Invalid=6163, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 09:37:48,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-11-09 09:37:48,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 521. [2021-11-09 09:37:48,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 521 states, 493 states have (on average 1.0121703853955375) internal successors, (499), 496 states have internal predecessors, (499), 13 states have call successors, (13), 13 states have call predecessors, (13), 14 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-09 09:37:48,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 526 transitions. [2021-11-09 09:37:48,211 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 526 transitions. Word has length 435 [2021-11-09 09:37:48,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:48,212 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 526 transitions. [2021-11-09 09:37:48,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.5) internal successors, (189), 40 states have internal predecessors, (189), 11 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2021-11-09 09:37:48,212 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 526 transitions. [2021-11-09 09:37:48,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2021-11-09 09:37:48,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:48,217 INFO L513 BasicCegarLoop]: trace histogram [77, 76, 76, 76, 76, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:48,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:48,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 09:37:48,440 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:37:48,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:48,440 INFO L85 PathProgramCache]: Analyzing trace with hash -422752958, now seen corresponding path program 22 times [2021-11-09 09:37:48,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:48,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169269974] [2021-11-09 09:37:48,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:48,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:48,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:37:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:48,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:37:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:48,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:37:48,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:48,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:37:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:48,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:37:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:48,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:37:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:48,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:37:48,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:48,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:37:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:48,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:37:48,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:48,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:37:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:48,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:37:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 15697 backedges. 3825 proven. 297 refuted. 0 times theorem prover too weak. 11575 trivial. 0 not checked. [2021-11-09 09:37:48,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:48,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169269974] [2021-11-09 09:37:48,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169269974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:48,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469894825] [2021-11-09 09:37:48,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:37:48,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:48,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:48,957 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:48,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 09:37:51,494 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:37:51,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:51,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 09:37:51,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 15697 backedges. 3825 proven. 297 refuted. 0 times theorem prover too weak. 11575 trivial. 0 not checked. [2021-11-09 09:37:52,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469894825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:52,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:52,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-11-09 09:37:52,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774888395] [2021-11-09 09:37:52,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:37:52,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:52,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:37:52,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:37:52,699 INFO L87 Difference]: Start difference. First operand 521 states and 526 transitions. Second operand has 15 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:37:53,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:37:53,593 INFO L93 Difference]: Finished difference Result 538 states and 544 transitions. [2021-11-09 09:37:53,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 09:37:53,593 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 501 [2021-11-09 09:37:53,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:37:53,597 INFO L225 Difference]: With dead ends: 538 [2021-11-09 09:37:53,597 INFO L226 Difference]: Without dead ends: 538 [2021-11-09 09:37:53,598 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 521 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:37:53,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-11-09 09:37:53,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 526. [2021-11-09 09:37:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 498 states have (on average 1.0140562248995983) internal successors, (505), 501 states have internal predecessors, (505), 13 states have call successors, (13), 13 states have call predecessors, (13), 14 states have return successors, (14), 11 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-09 09:37:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 532 transitions. [2021-11-09 09:37:53,614 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 532 transitions. Word has length 501 [2021-11-09 09:37:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:37:53,615 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 532 transitions. [2021-11-09 09:37:53,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:37:53,615 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 532 transitions. [2021-11-09 09:37:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-11-09 09:37:53,621 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:37:53,622 INFO L513 BasicCegarLoop]: trace histogram [78, 77, 77, 77, 77, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:37:53,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 09:37:53,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 09:37:53,845 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:37:53,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:37:53,845 INFO L85 PathProgramCache]: Analyzing trace with hash 697188589, now seen corresponding path program 23 times [2021-11-09 09:37:53,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:37:53,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78549259] [2021-11-09 09:37:53,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:37:53,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:37:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:54,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:37:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:54,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:37:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:54,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:37:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:54,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:37:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:54,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:37:54,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:54,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:37:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:54,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:37:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:54,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:37:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:54,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:37:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:54,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:37:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:54,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:37:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:37:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16089 backedges. 4468 proven. 346 refuted. 0 times theorem prover too weak. 11275 trivial. 0 not checked. [2021-11-09 09:37:54,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:37:54,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78549259] [2021-11-09 09:37:54,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78549259] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:54,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906584552] [2021-11-09 09:37:54,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:37:54,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:37:54,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:37:54,532 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:37:54,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 09:37:57,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-09 09:37:57,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:37:57,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 1317 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 09:37:57,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:37:59,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16089 backedges. 5354 proven. 1951 refuted. 0 times theorem prover too weak. 8784 trivial. 0 not checked. [2021-11-09 09:37:59,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906584552] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:37:59,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:37:59,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32] total 52 [2021-11-09 09:37:59,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558972467] [2021-11-09 09:37:59,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 09:37:59,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:37:59,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 09:37:59,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=2222, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 09:37:59,588 INFO L87 Difference]: Start difference. First operand 526 states and 532 transitions. Second operand has 52 states, 52 states have (on average 4.596153846153846) internal successors, (239), 50 states have internal predecessors, (239), 12 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-09 09:38:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:01,729 INFO L93 Difference]: Finished difference Result 692 states and 703 transitions. [2021-11-09 09:38:01,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-09 09:38:01,730 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.596153846153846) internal successors, (239), 50 states have internal predecessors, (239), 12 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 506 [2021-11-09 09:38:01,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:01,735 INFO L225 Difference]: With dead ends: 692 [2021-11-09 09:38:01,735 INFO L226 Difference]: Without dead ends: 692 [2021-11-09 09:38:01,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 503 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1525, Invalid=7405, Unknown=0, NotChecked=0, Total=8930 [2021-11-09 09:38:01,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-11-09 09:38:01,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 675. [2021-11-09 09:38:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 640 states have (on average 1.015625) internal successors, (650), 645 states have internal predecessors, (650), 16 states have call successors, (16), 15 states have call predecessors, (16), 18 states have return successors, (20), 14 states have call predecessors, (20), 15 states have call successors, (20) [2021-11-09 09:38:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 686 transitions. [2021-11-09 09:38:01,759 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 686 transitions. Word has length 506 [2021-11-09 09:38:01,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:01,760 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 686 transitions. [2021-11-09 09:38:01,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.596153846153846) internal successors, (239), 50 states have internal predecessors, (239), 12 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-09 09:38:01,761 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 686 transitions. [2021-11-09 09:38:01,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2021-11-09 09:38:01,767 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:01,767 INFO L513 BasicCegarLoop]: trace histogram [88, 87, 87, 87, 87, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:01,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:01,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-09 09:38:01,981 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:38:01,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:01,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1064351445, now seen corresponding path program 24 times [2021-11-09 09:38:01,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:01,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603606897] [2021-11-09 09:38:01,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:01,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:02,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:02,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:38:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:02,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:38:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:02,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:38:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:02,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:38:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:02,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:38:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:02,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:38:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:02,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:38:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:02,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:38:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:02,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:38:02,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:02,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:38:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:02,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 437 [2021-11-09 09:38:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20485 backedges. 7980 proven. 860 refuted. 0 times theorem prover too weak. 11645 trivial. 0 not checked. [2021-11-09 09:38:02,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:02,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603606897] [2021-11-09 09:38:02,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603606897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:02,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321202758] [2021-11-09 09:38:02,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:38:02,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:02,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:02,708 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:02,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 09:38:06,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-11-09 09:38:06,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:06,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 09:38:06,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:07,965 INFO L134 CoverageAnalysis]: Checked inductivity of 20485 backedges. 4849 proven. 364 refuted. 0 times theorem prover too weak. 15272 trivial. 0 not checked. [2021-11-09 09:38:07,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321202758] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:07,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:07,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18] total 42 [2021-11-09 09:38:07,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803100090] [2021-11-09 09:38:07,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 09:38:07,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:07,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 09:38:07,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1468, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 09:38:07,969 INFO L87 Difference]: Start difference. First operand 675 states and 686 transitions. Second operand has 42 states, 42 states have (on average 4.619047619047619) internal successors, (194), 40 states have internal predecessors, (194), 24 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-09 09:38:10,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:10,049 INFO L93 Difference]: Finished difference Result 691 states and 698 transitions. [2021-11-09 09:38:10,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-09 09:38:10,050 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.619047619047619) internal successors, (194), 40 states have internal predecessors, (194), 24 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) Word has length 567 [2021-11-09 09:38:10,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:10,053 INFO L225 Difference]: With dead ends: 691 [2021-11-09 09:38:10,054 INFO L226 Difference]: Without dead ends: 679 [2021-11-09 09:38:10,055 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2028 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1277, Invalid=6913, Unknown=0, NotChecked=0, Total=8190 [2021-11-09 09:38:10,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-11-09 09:38:10,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 657. [2021-11-09 09:38:10,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 627 states have (on average 1.0111642743221692) internal successors, (634), 628 states have internal predecessors, (634), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-09 09:38:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 663 transitions. [2021-11-09 09:38:10,074 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 663 transitions. Word has length 567 [2021-11-09 09:38:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:10,075 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 663 transitions. [2021-11-09 09:38:10,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.619047619047619) internal successors, (194), 40 states have internal predecessors, (194), 24 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-09 09:38:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 663 transitions. [2021-11-09 09:38:10,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2021-11-09 09:38:10,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:10,083 INFO L513 BasicCegarLoop]: trace histogram [100, 99, 99, 99, 99, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:10,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:10,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:10,297 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:38:10,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:10,297 INFO L85 PathProgramCache]: Analyzing trace with hash 501411891, now seen corresponding path program 25 times [2021-11-09 09:38:10,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:10,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865858718] [2021-11-09 09:38:10,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:10,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:10,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:10,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:10,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:38:10,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:10,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:38:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:10,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:38:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:10,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:38:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:10,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:38:10,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:10,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:38:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:10,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:38:10,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:10,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:38:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:10,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:38:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:10,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:38:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:10,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:38:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:11,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 508 [2021-11-09 09:38:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 26415 backedges. 9710 proven. 973 refuted. 0 times theorem prover too weak. 15732 trivial. 0 not checked. [2021-11-09 09:38:11,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:11,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865858718] [2021-11-09 09:38:11,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865858718] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:11,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857357130] [2021-11-09 09:38:11,024 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:38:11,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:11,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:11,025 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:11,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 09:38:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:13,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 09:38:13,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 26415 backedges. 13502 proven. 286 refuted. 0 times theorem prover too weak. 12627 trivial. 0 not checked. [2021-11-09 09:38:15,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857357130] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:15,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:15,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2021-11-09 09:38:15,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628093257] [2021-11-09 09:38:15,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 09:38:15,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:15,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 09:38:15,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1217, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:38:15,444 INFO L87 Difference]: Start difference. First operand 657 states and 663 transitions. Second operand has 40 states, 40 states have (on average 5.025) internal successors, (201), 39 states have internal predecessors, (201), 14 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-11-09 09:38:16,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:16,307 INFO L93 Difference]: Finished difference Result 684 states and 688 transitions. [2021-11-09 09:38:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 09:38:16,308 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.025) internal successors, (201), 39 states have internal predecessors, (201), 14 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 638 [2021-11-09 09:38:16,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:16,311 INFO L225 Difference]: With dead ends: 684 [2021-11-09 09:38:16,312 INFO L226 Difference]: Without dead ends: 675 [2021-11-09 09:38:16,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 649 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=965, Invalid=3195, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 09:38:16,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-11-09 09:38:16,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 662. [2021-11-09 09:38:16,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 632 states have (on average 1.0079113924050633) internal successors, (637), 633 states have internal predecessors, (637), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-09 09:38:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 666 transitions. [2021-11-09 09:38:16,330 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 666 transitions. Word has length 638 [2021-11-09 09:38:16,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:16,331 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 666 transitions. [2021-11-09 09:38:16,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.025) internal successors, (201), 39 states have internal predecessors, (201), 14 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2021-11-09 09:38:16,331 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 666 transitions. [2021-11-09 09:38:16,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2021-11-09 09:38:16,337 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:16,338 INFO L513 BasicCegarLoop]: trace histogram [102, 101, 101, 101, 101, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:16,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:16,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:16,553 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:38:16,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:16,553 INFO L85 PathProgramCache]: Analyzing trace with hash -344385043, now seen corresponding path program 26 times [2021-11-09 09:38:16,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:16,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169668457] [2021-11-09 09:38:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:16,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:16,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:16,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:38:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:16,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:38:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:16,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:38:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:16,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:38:16,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:16,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:38:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:16,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:38:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:16,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:38:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:16,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:38:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:16,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:38:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:16,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:38:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:17,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:38:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:17,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:38:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 27438 backedges. 10917 proven. 404 refuted. 0 times theorem prover too weak. 16117 trivial. 0 not checked. [2021-11-09 09:38:17,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:17,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169668457] [2021-11-09 09:38:17,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169668457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:17,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550188345] [2021-11-09 09:38:17,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:38:17,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:17,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:17,413 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:17,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 09:38:20,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:38:20,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:20,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 1671 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-09 09:38:20,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:22,577 INFO L134 CoverageAnalysis]: Checked inductivity of 27438 backedges. 10979 proven. 342 refuted. 0 times theorem prover too weak. 16117 trivial. 0 not checked. [2021-11-09 09:38:22,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550188345] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:22,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:22,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 43 [2021-11-09 09:38:22,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435738891] [2021-11-09 09:38:22,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 09:38:22,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:22,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 09:38:22,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1409, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 09:38:22,580 INFO L87 Difference]: Start difference. First operand 662 states and 666 transitions. Second operand has 43 states, 43 states have (on average 4.953488372093023) internal successors, (213), 42 states have internal predecessors, (213), 15 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-09 09:38:23,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:23,696 INFO L93 Difference]: Finished difference Result 692 states and 696 transitions. [2021-11-09 09:38:23,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-09 09:38:23,697 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 4.953488372093023) internal successors, (213), 42 states have internal predecessors, (213), 15 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 648 [2021-11-09 09:38:23,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:23,701 INFO L225 Difference]: With dead ends: 692 [2021-11-09 09:38:23,701 INFO L226 Difference]: Without dead ends: 686 [2021-11-09 09:38:23,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 728 GetRequests, 659 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1116, Invalid=3714, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 09:38:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-11-09 09:38:23,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 671. [2021-11-09 09:38:23,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 641 states have (on average 1.0078003120124805) internal successors, (646), 642 states have internal predecessors, (646), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-09 09:38:23,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 675 transitions. [2021-11-09 09:38:23,721 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 675 transitions. Word has length 648 [2021-11-09 09:38:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:23,722 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 675 transitions. [2021-11-09 09:38:23,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 4.953488372093023) internal successors, (213), 42 states have internal predecessors, (213), 15 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-09 09:38:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 675 transitions. [2021-11-09 09:38:23,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 654 [2021-11-09 09:38:23,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:23,733 INFO L513 BasicCegarLoop]: trace histogram [103, 102, 102, 102, 102, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:23,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:23,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:23,961 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:38:23,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:23,961 INFO L85 PathProgramCache]: Analyzing trace with hash -679479288, now seen corresponding path program 27 times [2021-11-09 09:38:23,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:23,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658079288] [2021-11-09 09:38:23,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:23,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:38:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:38:24,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:38:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:38:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:38:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:38:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:38:24,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:38:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:38:24,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:38:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:38:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:38:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 27957 backedges. 5736 proven. 354 refuted. 0 times theorem prover too weak. 21867 trivial. 0 not checked. [2021-11-09 09:38:24,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:24,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658079288] [2021-11-09 09:38:24,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658079288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:24,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658549923] [2021-11-09 09:38:24,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:38:24,522 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:24,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:24,523 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:24,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 09:38:27,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-09 09:38:27,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:27,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 09:38:27,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:29,310 INFO L134 CoverageAnalysis]: Checked inductivity of 27957 backedges. 5736 proven. 354 refuted. 0 times theorem prover too weak. 21867 trivial. 0 not checked. [2021-11-09 09:38:29,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658549923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:29,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:29,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2021-11-09 09:38:29,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371789509] [2021-11-09 09:38:29,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 09:38:29,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:29,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 09:38:29,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:38:29,312 INFO L87 Difference]: Start difference. First operand 671 states and 675 transitions. Second operand has 30 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:38:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:29,989 INFO L93 Difference]: Finished difference Result 685 states and 689 transitions. [2021-11-09 09:38:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:38:29,990 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 653 [2021-11-09 09:38:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:29,993 INFO L225 Difference]: With dead ends: 685 [2021-11-09 09:38:29,993 INFO L226 Difference]: Without dead ends: 685 [2021-11-09 09:38:29,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1426, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 09:38:29,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-11-09 09:38:30,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 672. [2021-11-09 09:38:30,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 642 states have (on average 1.0077881619937694) internal successors, (647), 643 states have internal predecessors, (647), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-09 09:38:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 676 transitions. [2021-11-09 09:38:30,009 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 676 transitions. Word has length 653 [2021-11-09 09:38:30,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:30,010 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 676 transitions. [2021-11-09 09:38:30,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.9655172413793105) internal successors, (144), 29 states have internal predecessors, (144), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:38:30,011 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 676 transitions. [2021-11-09 09:38:30,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 659 [2021-11-09 09:38:30,017 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:30,018 INFO L513 BasicCegarLoop]: trace histogram [104, 103, 103, 103, 103, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:30,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:30,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-09 09:38:30,234 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:38:30,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:30,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1104503271, now seen corresponding path program 28 times [2021-11-09 09:38:30,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:30,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544671398] [2021-11-09 09:38:30,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:30,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:38:30,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:38:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:38:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:38:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:38:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:38:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:38:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:38:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:38:30,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:38:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:38:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:38:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:30,881 INFO L134 CoverageAnalysis]: Checked inductivity of 28481 backedges. 6198 proven. 416 refuted. 0 times theorem prover too weak. 21867 trivial. 0 not checked. [2021-11-09 09:38:30,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:30,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544671398] [2021-11-09 09:38:30,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544671398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:30,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464867143] [2021-11-09 09:38:30,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:38:30,883 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:30,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:30,884 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:30,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 09:38:35,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:38:35,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:35,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 1695 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 09:38:35,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:37,010 INFO L134 CoverageAnalysis]: Checked inductivity of 28481 backedges. 6198 proven. 416 refuted. 0 times theorem prover too weak. 21867 trivial. 0 not checked. [2021-11-09 09:38:37,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464867143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:37,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:37,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-11-09 09:38:37,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251332908] [2021-11-09 09:38:37,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:38:37,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:37,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:38:37,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:38:37,014 INFO L87 Difference]: Start difference. First operand 672 states and 676 transitions. Second operand has 17 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:38:37,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:37,850 INFO L93 Difference]: Finished difference Result 701 states and 707 transitions. [2021-11-09 09:38:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-09 09:38:37,850 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 658 [2021-11-09 09:38:37,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:37,855 INFO L225 Difference]: With dead ends: 701 [2021-11-09 09:38:37,855 INFO L226 Difference]: Without dead ends: 701 [2021-11-09 09:38:37,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 682 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:38:37,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-11-09 09:38:37,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 677. [2021-11-09 09:38:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 647 states have (on average 1.009273570324575) internal successors, (653), 648 states have internal predecessors, (653), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-09 09:38:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 682 transitions. [2021-11-09 09:38:37,872 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 682 transitions. Word has length 658 [2021-11-09 09:38:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:37,873 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 682 transitions. [2021-11-09 09:38:37,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:38:37,874 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 682 transitions. [2021-11-09 09:38:37,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 664 [2021-11-09 09:38:37,883 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:37,884 INFO L513 BasicCegarLoop]: trace histogram [105, 104, 104, 104, 104, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:37,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-09 09:38:38,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-09 09:38:38,109 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:38:38,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:38,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1375581336, now seen corresponding path program 29 times [2021-11-09 09:38:38,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:38,110 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354386612] [2021-11-09 09:38:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:38,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:38,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:38,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:38:38,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:38,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:38:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:38,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:38:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:38,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:38:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:38,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:38:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:38,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:38:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:38,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:38:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:38,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:38:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:38,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:38:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:38,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:38:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:38,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:38:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:39,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:38:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:39,019 INFO L134 CoverageAnalysis]: Checked inductivity of 29010 backedges. 7089 proven. 486 refuted. 0 times theorem prover too weak. 21435 trivial. 0 not checked. [2021-11-09 09:38:39,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:39,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354386612] [2021-11-09 09:38:39,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354386612] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:39,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797898820] [2021-11-09 09:38:39,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:38:39,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:39,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:39,025 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:39,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 09:38:43,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-11-09 09:38:43,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:43,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 1707 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 09:38:43,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 29010 backedges. 7054 proven. 2006 refuted. 0 times theorem prover too weak. 19950 trivial. 0 not checked. [2021-11-09 09:38:45,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797898820] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:45,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:45,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 36] total 53 [2021-11-09 09:38:45,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491111786] [2021-11-09 09:38:45,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-09 09:38:45,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:45,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-09 09:38:45,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2250, Unknown=0, NotChecked=0, Total=2756 [2021-11-09 09:38:45,669 INFO L87 Difference]: Start difference. First operand 677 states and 682 transitions. Second operand has 53 states, 53 states have (on average 4.60377358490566) internal successors, (244), 51 states have internal predecessors, (244), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2021-11-09 09:38:47,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:47,663 INFO L93 Difference]: Finished difference Result 779 states and 785 transitions. [2021-11-09 09:38:47,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-09 09:38:47,663 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.60377358490566) internal successors, (244), 51 states have internal predecessors, (244), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 663 [2021-11-09 09:38:47,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:47,666 INFO L225 Difference]: With dead ends: 779 [2021-11-09 09:38:47,666 INFO L226 Difference]: Without dead ends: 779 [2021-11-09 09:38:47,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 667 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1518, Invalid=6492, Unknown=0, NotChecked=0, Total=8010 [2021-11-09 09:38:47,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-11-09 09:38:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 763. [2021-11-09 09:38:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 731 states have (on average 1.009575923392613) internal successors, (738), 732 states have internal predecessors, (738), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-11-09 09:38:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 769 transitions. [2021-11-09 09:38:47,685 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 769 transitions. Word has length 663 [2021-11-09 09:38:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:47,686 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 769 transitions. [2021-11-09 09:38:47,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.60377358490566) internal successors, (244), 51 states have internal predecessors, (244), 14 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2021-11-09 09:38:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 769 transitions. [2021-11-09 09:38:47,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 740 [2021-11-09 09:38:47,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:47,694 INFO L513 BasicCegarLoop]: trace histogram [118, 117, 117, 117, 117, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:47,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:47,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:47,921 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:38:47,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:47,921 INFO L85 PathProgramCache]: Analyzing trace with hash 79086155, now seen corresponding path program 30 times [2021-11-09 09:38:47,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:47,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001229250] [2021-11-09 09:38:47,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:47,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:48,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:48,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:38:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:48,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:38:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:48,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:38:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:48,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:38:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:48,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:38:48,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:48,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:38:48,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:48,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:38:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:48,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:38:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:48,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:38:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:48,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:38:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:48,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:38:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:48,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:38:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:48,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:38:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:48,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:38:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:38:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 36595 backedges. 14194 proven. 471 refuted. 0 times theorem prover too weak. 21930 trivial. 0 not checked. [2021-11-09 09:38:48,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:38:48,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001229250] [2021-11-09 09:38:48,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001229250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:48,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569853519] [2021-11-09 09:38:48,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:38:48,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:48,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:38:48,837 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:38:48,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-09 09:38:53,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-11-09 09:38:53,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:38:53,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1848 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 09:38:53,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:38:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 36595 backedges. 7581 proven. 2304 refuted. 0 times theorem prover too weak. 26710 trivial. 0 not checked. [2021-11-09 09:38:56,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569853519] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:38:56,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:38:56,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 24] total 54 [2021-11-09 09:38:56,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075954578] [2021-11-09 09:38:56,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-09 09:38:56,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:38:56,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-09 09:38:56,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=2487, Unknown=0, NotChecked=0, Total=2862 [2021-11-09 09:38:56,128 INFO L87 Difference]: Start difference. First operand 763 states and 769 transitions. Second operand has 54 states, 54 states have (on average 4.666666666666667) internal successors, (252), 52 states have internal predecessors, (252), 27 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (27), 26 states have call predecessors, (27), 25 states have call successors, (27) [2021-11-09 09:38:59,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:38:59,143 INFO L93 Difference]: Finished difference Result 874 states and 880 transitions. [2021-11-09 09:38:59,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-09 09:38:59,144 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.666666666666667) internal successors, (252), 52 states have internal predecessors, (252), 27 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (27), 26 states have call predecessors, (27), 25 states have call successors, (27) Word has length 739 [2021-11-09 09:38:59,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:38:59,148 INFO L225 Difference]: With dead ends: 874 [2021-11-09 09:38:59,148 INFO L226 Difference]: Without dead ends: 865 [2021-11-09 09:38:59,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 860 GetRequests, 743 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3695 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2154, Invalid=11888, Unknown=0, NotChecked=0, Total=14042 [2021-11-09 09:38:59,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-11-09 09:38:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 844. [2021-11-09 09:38:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 810 states have (on average 1.0074074074074073) internal successors, (816), 811 states have internal predecessors, (816), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-09 09:38:59,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 849 transitions. [2021-11-09 09:38:59,171 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 849 transitions. Word has length 739 [2021-11-09 09:38:59,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:38:59,172 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 849 transitions. [2021-11-09 09:38:59,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.666666666666667) internal successors, (252), 52 states have internal predecessors, (252), 27 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (27), 26 states have call predecessors, (27), 25 states have call successors, (27) [2021-11-09 09:38:59,173 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 849 transitions. [2021-11-09 09:38:59,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2021-11-09 09:38:59,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:38:59,188 INFO L513 BasicCegarLoop]: trace histogram [133, 132, 132, 132, 132, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:38:59,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-09 09:38:59,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:38:59,401 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:38:59,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:38:59,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1645932632, now seen corresponding path program 31 times [2021-11-09 09:38:59,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:38:59,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752280282] [2021-11-09 09:38:59,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:38:59,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:38:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:00,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:39:00,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:00,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:39:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:00,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:39:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:00,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:39:00,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:00,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:39:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:00,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:39:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:00,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:39:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:00,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:39:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:00,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:39:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:00,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:39:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:00,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:39:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:00,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:39:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:00,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:39:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:00,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:39:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:00,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:39:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 46399 backedges. 16838 proven. 543 refuted. 0 times theorem prover too weak. 29018 trivial. 0 not checked. [2021-11-09 09:39:00,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:00,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752280282] [2021-11-09 09:39:00,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752280282] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:00,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063166368] [2021-11-09 09:39:00,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:39:00,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:39:00,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:39:00,541 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:39:00,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-09 09:39:04,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:04,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 2109 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 09:39:04,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:39:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 46399 backedges. 16912 proven. 469 refuted. 0 times theorem prover too weak. 29018 trivial. 0 not checked. [2021-11-09 09:39:07,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063166368] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:07,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:39:07,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2021-11-09 09:39:07,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703063856] [2021-11-09 09:39:07,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-09 09:39:07,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:07,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-09 09:39:07,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=1835, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 09:39:07,585 INFO L87 Difference]: Start difference. First operand 844 states and 849 transitions. Second operand has 49 states, 49 states have (on average 4.959183673469388) internal successors, (243), 48 states have internal predecessors, (243), 17 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-09 09:39:09,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:09,011 INFO L93 Difference]: Finished difference Result 877 states and 882 transitions. [2021-11-09 09:39:09,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 09:39:09,012 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.959183673469388) internal successors, (243), 48 states have internal predecessors, (243), 17 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 825 [2021-11-09 09:39:09,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:09,015 INFO L225 Difference]: With dead ends: 877 [2021-11-09 09:39:09,015 INFO L226 Difference]: Without dead ends: 871 [2021-11-09 09:39:09,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 917 GetRequests, 838 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1451, Invalid=4869, Unknown=0, NotChecked=0, Total=6320 [2021-11-09 09:39:09,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-11-09 09:39:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 853. [2021-11-09 09:39:09,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 819 states have (on average 1.0073260073260073) internal successors, (825), 820 states have internal predecessors, (825), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-09 09:39:09,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 858 transitions. [2021-11-09 09:39:09,032 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 858 transitions. Word has length 825 [2021-11-09 09:39:09,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:09,033 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 858 transitions. [2021-11-09 09:39:09,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.959183673469388) internal successors, (243), 48 states have internal predecessors, (243), 17 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-09 09:39:09,034 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 858 transitions. [2021-11-09 09:39:09,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2021-11-09 09:39:09,043 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:09,043 INFO L513 BasicCegarLoop]: trace histogram [134, 133, 133, 133, 133, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:39:09,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-09 09:39:09,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-09 09:39:09,257 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:39:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:09,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1316222893, now seen corresponding path program 32 times [2021-11-09 09:39:09,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:09,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256875518] [2021-11-09 09:39:09,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:09,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:09,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:09,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:39:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:09,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:39:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:10,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:39:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:10,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:39:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:10,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:39:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:10,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:39:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:10,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:39:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:10,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:39:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:10,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:39:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:10,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:39:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:10,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:39:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:10,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:39:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:10,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:39:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:10,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:39:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:10,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:39:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 47075 backedges. 8778 proven. 483 refuted. 0 times theorem prover too weak. 37814 trivial. 0 not checked. [2021-11-09 09:39:10,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:10,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256875518] [2021-11-09 09:39:10,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256875518] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:10,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686881906] [2021-11-09 09:39:10,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:39:10,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:39:10,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:39:10,117 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:39:10,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-09 09:39:14,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:39:14,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:39:14,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 2121 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-09 09:39:14,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:39:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 47075 backedges. 8778 proven. 483 refuted. 0 times theorem prover too weak. 37814 trivial. 0 not checked. [2021-11-09 09:39:16,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686881906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:16,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:39:16,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-11-09 09:39:16,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016139530] [2021-11-09 09:39:16,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:39:16,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:16,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:39:16,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:39:16,886 INFO L87 Difference]: Start difference. First operand 853 states and 858 transitions. Second operand has 18 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:39:17,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:17,933 INFO L93 Difference]: Finished difference Result 870 states and 875 transitions. [2021-11-09 09:39:17,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:39:17,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 830 [2021-11-09 09:39:17,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:17,938 INFO L225 Difference]: With dead ends: 870 [2021-11-09 09:39:17,938 INFO L226 Difference]: Without dead ends: 870 [2021-11-09 09:39:17,938 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 890 GetRequests, 858 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:39:17,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-11-09 09:39:17,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 854. [2021-11-09 09:39:17,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 820 states have (on average 1.0073170731707317) internal successors, (826), 821 states have internal predecessors, (826), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-09 09:39:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 859 transitions. [2021-11-09 09:39:17,957 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 859 transitions. Word has length 830 [2021-11-09 09:39:17,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:17,958 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 859 transitions. [2021-11-09 09:39:17,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:39:17,959 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 859 transitions. [2021-11-09 09:39:17,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2021-11-09 09:39:17,968 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:17,969 INFO L513 BasicCegarLoop]: trace histogram [135, 134, 134, 134, 134, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:39:18,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-09 09:39:18,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 09:39:18,185 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:39:18,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:18,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1746428258, now seen corresponding path program 33 times [2021-11-09 09:39:18,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:18,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790742591] [2021-11-09 09:39:18,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:18,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:18,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:39:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:18,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:39:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:18,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:39:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:18,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:39:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:18,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:39:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:18,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:39:18,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:18,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:39:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:18,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:39:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:18,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:39:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:18,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:39:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:18,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:39:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:18,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:39:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:18,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:39:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:18,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:39:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:18,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:39:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 47756 backedges. 9387 proven. 555 refuted. 0 times theorem prover too weak. 37814 trivial. 0 not checked. [2021-11-09 09:39:18,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:18,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790742591] [2021-11-09 09:39:18,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790742591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:18,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110591937] [2021-11-09 09:39:18,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:39:18,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:39:18,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:39:18,969 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:39:18,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-09 09:39:24,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-09 09:39:24,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:39:24,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-09 09:39:24,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:39:26,263 INFO L134 CoverageAnalysis]: Checked inductivity of 47756 backedges. 9387 proven. 555 refuted. 0 times theorem prover too weak. 37814 trivial. 0 not checked. [2021-11-09 09:39:26,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110591937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:26,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:39:26,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 35 [2021-11-09 09:39:26,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078644553] [2021-11-09 09:39:26,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-09 09:39:26,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:26,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-09 09:39:26,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2021-11-09 09:39:26,266 INFO L87 Difference]: Start difference. First operand 854 states and 859 transitions. Second operand has 36 states, 35 states have (on average 4.9714285714285715) internal successors, (174), 35 states have internal predecessors, (174), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:39:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:27,166 INFO L93 Difference]: Finished difference Result 886 states and 893 transitions. [2021-11-09 09:39:27,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:39:27,167 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 4.9714285714285715) internal successors, (174), 35 states have internal predecessors, (174), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 835 [2021-11-09 09:39:27,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:27,170 INFO L225 Difference]: With dead ends: 886 [2021-11-09 09:39:27,170 INFO L226 Difference]: Without dead ends: 886 [2021-11-09 09:39:27,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 897 GetRequests, 847 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=539, Invalid=2113, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 09:39:27,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886 states. [2021-11-09 09:39:27,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886 to 859. [2021-11-09 09:39:27,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 825 states have (on average 1.0084848484848485) internal successors, (832), 826 states have internal predecessors, (832), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-11-09 09:39:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 865 transitions. [2021-11-09 09:39:27,184 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 865 transitions. Word has length 835 [2021-11-09 09:39:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:27,185 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 865 transitions. [2021-11-09 09:39:27,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 4.9714285714285715) internal successors, (174), 35 states have internal predecessors, (174), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:39:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 865 transitions. [2021-11-09 09:39:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2021-11-09 09:39:27,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:27,194 INFO L513 BasicCegarLoop]: trace histogram [136, 135, 135, 135, 135, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:39:27,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-09 09:39:27,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-09 09:39:27,417 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:39:27,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:27,417 INFO L85 PathProgramCache]: Analyzing trace with hash 380289229, now seen corresponding path program 34 times [2021-11-09 09:39:27,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:27,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247625839] [2021-11-09 09:39:27,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:27,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:28,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:39:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:28,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:39:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:28,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:39:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:28,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:39:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:28,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:39:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:28,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:39:28,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:28,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:39:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:28,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:39:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:28,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:39:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:28,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:39:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:28,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:39:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:28,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:39:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:28,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:39:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:28,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:39:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:28,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:39:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:28,534 INFO L134 CoverageAnalysis]: Checked inductivity of 48442 backedges. 10566 proven. 650 refuted. 0 times theorem prover too weak. 37226 trivial. 0 not checked. [2021-11-09 09:39:28,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:28,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247625839] [2021-11-09 09:39:28,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247625839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:28,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782605090] [2021-11-09 09:39:28,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:39:28,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:39:28,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:39:28,537 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:39:28,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-09 09:39:33,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:39:33,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:39:33,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 1815 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 09:39:33,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:39:36,282 INFO L134 CoverageAnalysis]: Checked inductivity of 48442 backedges. 10491 proven. 2097 refuted. 0 times theorem prover too weak. 35854 trivial. 0 not checked. [2021-11-09 09:39:36,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782605090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:36,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:39:36,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 39] total 58 [2021-11-09 09:39:36,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363507227] [2021-11-09 09:39:36,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-09 09:39:36,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:36,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-09 09:39:36,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=2676, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 09:39:36,287 INFO L87 Difference]: Start difference. First operand 859 states and 865 transitions. Second operand has 58 states, 58 states have (on average 4.637931034482759) internal successors, (269), 56 states have internal predecessors, (269), 16 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-09 09:39:38,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:38,207 INFO L93 Difference]: Finished difference Result 974 states and 981 transitions. [2021-11-09 09:39:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-09 09:39:38,208 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 4.637931034482759) internal successors, (269), 56 states have internal predecessors, (269), 16 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) Word has length 840 [2021-11-09 09:39:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:38,211 INFO L225 Difference]: With dead ends: 974 [2021-11-09 09:39:38,211 INFO L226 Difference]: Without dead ends: 974 [2021-11-09 09:39:38,212 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 943 GetRequests, 847 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1843, Invalid=7469, Unknown=0, NotChecked=0, Total=9312 [2021-11-09 09:39:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-11-09 09:39:38,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 955. [2021-11-09 09:39:38,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 919 states have (on average 1.0087051142546246) internal successors, (927), 920 states have internal predecessors, (927), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 09:39:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 962 transitions. [2021-11-09 09:39:38,230 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 962 transitions. Word has length 840 [2021-11-09 09:39:38,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:38,231 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 962 transitions. [2021-11-09 09:39:38,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 4.637931034482759) internal successors, (269), 56 states have internal predecessors, (269), 16 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-09 09:39:38,231 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 962 transitions. [2021-11-09 09:39:38,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 927 [2021-11-09 09:39:38,242 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:38,242 INFO L513 BasicCegarLoop]: trace histogram [151, 150, 150, 150, 150, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:39:38,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-09 09:39:38,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:39:38,465 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:39:38,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:38,465 INFO L85 PathProgramCache]: Analyzing trace with hash -848043632, now seen corresponding path program 35 times [2021-11-09 09:39:38,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:38,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229533874] [2021-11-09 09:39:38,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:38,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:38,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:38,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:39:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:38,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:39:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:38,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:39:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:38,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:39:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:38,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:39:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:38,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:39:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:38,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:39:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:39,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:39:39,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:39,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:39:39,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:39,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:39:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:39,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:39:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:39,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:39:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:39,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:39:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:39,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:39:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:39,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:39:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:39,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:39:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 59640 backedges. 21148 proven. 620 refuted. 0 times theorem prover too weak. 37872 trivial. 0 not checked. [2021-11-09 09:39:39,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:39,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229533874] [2021-11-09 09:39:39,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229533874] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:39,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454996330] [2021-11-09 09:39:39,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:39:39,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:39:39,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:39:39,725 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:39:39,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-09 09:39:52,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-11-09 09:39:52,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:39:52,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 2297 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 09:39:52,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:39:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 59640 backedges. 25480 proven. 3556 refuted. 0 times theorem prover too weak. 30604 trivial. 0 not checked. [2021-11-09 09:39:55,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454996330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:55,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:39:55,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 38] total 66 [2021-11-09 09:39:55,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277738362] [2021-11-09 09:39:55,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-09 09:39:55,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:39:55,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-09 09:39:55,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=3587, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 09:39:55,785 INFO L87 Difference]: Start difference. First operand 955 states and 962 transitions. Second operand has 66 states, 66 states have (on average 4.954545454545454) internal successors, (327), 65 states have internal predecessors, (327), 17 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-09 09:39:58,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:39:58,628 INFO L93 Difference]: Finished difference Result 976 states and 981 transitions. [2021-11-09 09:39:58,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-09 09:39:58,629 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 4.954545454545454) internal successors, (327), 65 states have internal predecessors, (327), 17 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 926 [2021-11-09 09:39:58,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:39:58,632 INFO L225 Difference]: With dead ends: 976 [2021-11-09 09:39:58,632 INFO L226 Difference]: Without dead ends: 970 [2021-11-09 09:39:58,633 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1039 GetRequests, 926 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3182 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2183, Invalid=10699, Unknown=0, NotChecked=0, Total=12882 [2021-11-09 09:39:58,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2021-11-09 09:39:58,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 955. [2021-11-09 09:39:58,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 919 states have (on average 1.0065288356909685) internal successors, (925), 920 states have internal predecessors, (925), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-09 09:39:58,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 960 transitions. [2021-11-09 09:39:58,645 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 960 transitions. Word has length 926 [2021-11-09 09:39:58,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:39:58,646 INFO L470 AbstractCegarLoop]: Abstraction has 955 states and 960 transitions. [2021-11-09 09:39:58,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 4.954545454545454) internal successors, (327), 65 states have internal predecessors, (327), 17 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2021-11-09 09:39:58,647 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 960 transitions. [2021-11-09 09:39:58,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 932 [2021-11-09 09:39:58,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:39:58,658 INFO L513 BasicCegarLoop]: trace histogram [152, 151, 151, 151, 151, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:39:58,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-09 09:39:58,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:39:58,873 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:39:58,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:39:58,873 INFO L85 PathProgramCache]: Analyzing trace with hash 401870661, now seen corresponding path program 36 times [2021-11-09 09:39:58,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:39:58,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541485704] [2021-11-09 09:39:58,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:39:58,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:39:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:39:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:39:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:39:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:39:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:39:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:39:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:39:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:39:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:39:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:39:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:39:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:39:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:39:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:39:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:39:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:39:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:39:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 60407 backedges. 11325 proven. 632 refuted. 0 times theorem prover too weak. 48450 trivial. 0 not checked. [2021-11-09 09:39:59,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:39:59,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541485704] [2021-11-09 09:39:59,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541485704] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:39:59,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750409094] [2021-11-09 09:39:59,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:39:59,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:39:59,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:39:59,625 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:39:59,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-09 09:40:07,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2021-11-09 09:40:07,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:40:07,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 2370 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 09:40:07,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 60407 backedges. 15859 proven. 4559 refuted. 0 times theorem prover too weak. 39989 trivial. 0 not checked. [2021-11-09 09:40:10,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750409094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:10,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:10,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 44 [2021-11-09 09:40:10,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687029180] [2021-11-09 09:40:10,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-09 09:40:10,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:10,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-09 09:40:10,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1772, Unknown=0, NotChecked=0, Total=1980 [2021-11-09 09:40:10,437 INFO L87 Difference]: Start difference. First operand 955 states and 960 transitions. Second operand has 45 states, 44 states have (on average 4.590909090909091) internal successors, (202), 43 states have internal predecessors, (202), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-09 09:40:13,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:13,738 INFO L93 Difference]: Finished difference Result 1103 states and 1115 transitions. [2021-11-09 09:40:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-09 09:40:13,738 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 4.590909090909091) internal successors, (202), 43 states have internal predecessors, (202), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 931 [2021-11-09 09:40:13,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:13,742 INFO L225 Difference]: With dead ends: 1103 [2021-11-09 09:40:13,742 INFO L226 Difference]: Without dead ends: 1103 [2021-11-09 09:40:13,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 937 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1082, Invalid=8424, Unknown=0, NotChecked=0, Total=9506 [2021-11-09 09:40:13,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-11-09 09:40:13,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 1072. [2021-11-09 09:40:13,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1030 states have (on average 1.007766990291262) internal successors, (1038), 1032 states have internal predecessors, (1038), 22 states have call successors, (22), 19 states have call predecessors, (22), 19 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-09 09:40:13,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1082 transitions. [2021-11-09 09:40:13,771 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1082 transitions. Word has length 931 [2021-11-09 09:40:13,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:13,772 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1082 transitions. [2021-11-09 09:40:13,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 4.590909090909091) internal successors, (202), 43 states have internal predecessors, (202), 5 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2021-11-09 09:40:13,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1082 transitions. [2021-11-09 09:40:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 942 [2021-11-09 09:40:13,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:13,785 INFO L513 BasicCegarLoop]: trace histogram [154, 153, 153, 153, 153, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:13,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:13,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:13,996 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:40:13,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:13,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1421501723, now seen corresponding path program 37 times [2021-11-09 09:40:13,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:13,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527800424] [2021-11-09 09:40:13,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:13,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:14,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:40:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:14,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:40:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:14,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:40:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:14,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:40:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:14,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:40:14,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:14,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:40:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:14,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:40:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:14,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:40:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:14,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:40:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:14,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:40:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:14,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:40:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:14,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:40:14,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:14,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:40:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:15,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 594 [2021-11-09 09:40:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:15,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 675 [2021-11-09 09:40:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:15,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 761 [2021-11-09 09:40:15,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 61956 backedges. 18457 proven. 3667 refuted. 0 times theorem prover too weak. 39832 trivial. 0 not checked. [2021-11-09 09:40:15,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:15,102 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527800424] [2021-11-09 09:40:15,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527800424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:15,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421731272] [2021-11-09 09:40:15,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:40:15,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:15,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:15,104 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:15,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-09 09:40:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:21,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 2394 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 09:40:21,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 61956 backedges. 35953 proven. 418 refuted. 0 times theorem prover too weak. 25585 trivial. 0 not checked. [2021-11-09 09:40:23,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421731272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:23,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:23,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29] total 46 [2021-11-09 09:40:23,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982564335] [2021-11-09 09:40:23,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 09:40:23,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:23,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 09:40:23,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=1615, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 09:40:23,713 INFO L87 Difference]: Start difference. First operand 1072 states and 1082 transitions. Second operand has 46 states, 46 states have (on average 5.130434782608695) internal successors, (236), 45 states have internal predecessors, (236), 15 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-09 09:40:24,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:24,843 INFO L93 Difference]: Finished difference Result 1060 states and 1066 transitions. [2021-11-09 09:40:24,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 09:40:24,844 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.130434782608695) internal successors, (236), 45 states have internal predecessors, (236), 15 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 941 [2021-11-09 09:40:24,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:24,849 INFO L225 Difference]: With dead ends: 1060 [2021-11-09 09:40:24,850 INFO L226 Difference]: Without dead ends: 1052 [2021-11-09 09:40:24,850 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1017 GetRequests, 958 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=2815, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 09:40:24,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-11-09 09:40:24,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1046. [2021-11-09 09:40:24,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1008 states have (on average 1.0069444444444444) internal successors, (1015), 1009 states have internal predecessors, (1015), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-09 09:40:24,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1052 transitions. [2021-11-09 09:40:24,872 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1052 transitions. Word has length 941 [2021-11-09 09:40:24,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:24,873 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1052 transitions. [2021-11-09 09:40:24,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.130434782608695) internal successors, (236), 45 states have internal predecessors, (236), 15 states have call successors, (18), 3 states have call predecessors, (18), 3 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-09 09:40:24,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1052 transitions. [2021-11-09 09:40:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1028 [2021-11-09 09:40:24,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:24,886 INFO L513 BasicCegarLoop]: trace histogram [169, 168, 168, 168, 168, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:24,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:25,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-09 09:40:25,101 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:40:25,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:25,101 INFO L85 PathProgramCache]: Analyzing trace with hash -697239742, now seen corresponding path program 38 times [2021-11-09 09:40:25,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:25,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763994310] [2021-11-09 09:40:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:25,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:25,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:40:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:25,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:40:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:25,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:40:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:25,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:40:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:25,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:40:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:25,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:40:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:25,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:40:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:25,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:40:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:25,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:40:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:25,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:40:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:26,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:40:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:26,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:40:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:26,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:40:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:26,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:40:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:26,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:40:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:26,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:40:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:26,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:40:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 74548 backedges. 25342 proven. 702 refuted. 0 times theorem prover too weak. 48504 trivial. 0 not checked. [2021-11-09 09:40:26,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:26,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763994310] [2021-11-09 09:40:26,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763994310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:26,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134955817] [2021-11-09 09:40:26,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:40:26,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:26,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:26,557 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:26,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-09 09:40:33,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:40:33,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:40:33,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 2607 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 09:40:33,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 74548 backedges. 25428 proven. 616 refuted. 0 times theorem prover too weak. 48504 trivial. 0 not checked. [2021-11-09 09:40:36,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134955817] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:36,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:36,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 55 [2021-11-09 09:40:36,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461188786] [2021-11-09 09:40:36,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-09 09:40:36,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:36,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-09 09:40:36,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=2317, Unknown=0, NotChecked=0, Total=2970 [2021-11-09 09:40:36,116 INFO L87 Difference]: Start difference. First operand 1046 states and 1052 transitions. Second operand has 55 states, 55 states have (on average 4.963636363636364) internal successors, (273), 54 states have internal predecessors, (273), 19 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-09 09:40:37,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:37,875 INFO L93 Difference]: Finished difference Result 1073 states and 1078 transitions. [2021-11-09 09:40:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-09 09:40:37,876 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.963636363636364) internal successors, (273), 54 states have internal predecessors, (273), 19 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 1027 [2021-11-09 09:40:37,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:37,881 INFO L225 Difference]: With dead ends: 1073 [2021-11-09 09:40:37,881 INFO L226 Difference]: Without dead ends: 1067 [2021-11-09 09:40:37,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1130 GetRequests, 1041 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1894 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1830, Invalid=6180, Unknown=0, NotChecked=0, Total=8010 [2021-11-09 09:40:37,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-11-09 09:40:37,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1051. [2021-11-09 09:40:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1013 states have (on average 1.005923000987167) internal successors, (1019), 1014 states have internal predecessors, (1019), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-09 09:40:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1056 transitions. [2021-11-09 09:40:37,899 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1056 transitions. Word has length 1027 [2021-11-09 09:40:37,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:37,900 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 1056 transitions. [2021-11-09 09:40:37,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.963636363636364) internal successors, (273), 54 states have internal predecessors, (273), 19 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-09 09:40:37,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1056 transitions. [2021-11-09 09:40:37,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1033 [2021-11-09 09:40:37,913 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:37,914 INFO L513 BasicCegarLoop]: trace histogram [170, 169, 169, 169, 169, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:37,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:38,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:38,129 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:40:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:38,129 INFO L85 PathProgramCache]: Analyzing trace with hash 548287687, now seen corresponding path program 39 times [2021-11-09 09:40:38,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:38,130 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498595741] [2021-11-09 09:40:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:38,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:38,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:40:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:38,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:40:38,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:38,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:40:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:38,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:40:38,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:38,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:40:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:38,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:40:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:38,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:40:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:39,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:40:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:39,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:40:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:39,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:40:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:39,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:40:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:39,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:40:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:39,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:40:39,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:39,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:40:39,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:39,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:40:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:39,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:40:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:39,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:40:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 75406 backedges. 13512 proven. 714 refuted. 0 times theorem prover too weak. 61180 trivial. 0 not checked. [2021-11-09 09:40:39,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:39,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498595741] [2021-11-09 09:40:39,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498595741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:39,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159780576] [2021-11-09 09:40:39,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:40:39,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:39,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:39,254 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:39,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-09 09:40:46,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-09 09:40:46,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:40:46,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:40:46,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:40:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 75406 backedges. 13512 proven. 714 refuted. 0 times theorem prover too weak. 61180 trivial. 0 not checked. [2021-11-09 09:40:48,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159780576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:48,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:40:48,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2021-11-09 09:40:48,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430530449] [2021-11-09 09:40:48,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-09 09:40:48,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:40:48,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-09 09:40:48,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2021-11-09 09:40:48,875 INFO L87 Difference]: Start difference. First operand 1051 states and 1056 transitions. Second operand has 40 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:40:50,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:40:50,039 INFO L93 Difference]: Finished difference Result 1083 states and 1090 transitions. [2021-11-09 09:40:50,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:40:50,040 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 1032 [2021-11-09 09:40:50,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:40:50,043 INFO L225 Difference]: With dead ends: 1083 [2021-11-09 09:40:50,043 INFO L226 Difference]: Without dead ends: 1083 [2021-11-09 09:40:50,044 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1102 GetRequests, 1046 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=660, Invalid=2646, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 09:40:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2021-11-09 09:40:50,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1056. [2021-11-09 09:40:50,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1018 states have (on average 1.006876227897839) internal successors, (1025), 1019 states have internal predecessors, (1025), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-11-09 09:40:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1062 transitions. [2021-11-09 09:40:50,056 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1062 transitions. Word has length 1032 [2021-11-09 09:40:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:40:50,057 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 1062 transitions. [2021-11-09 09:40:50,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 4.9743589743589745) internal successors, (194), 39 states have internal predecessors, (194), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:40:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1062 transitions. [2021-11-09 09:40:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1038 [2021-11-09 09:40:50,069 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:40:50,069 INFO L513 BasicCegarLoop]: trace histogram [171, 170, 170, 170, 170, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:40:50,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-09 09:40:50,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-09 09:40:50,297 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:40:50,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:40:50,297 INFO L85 PathProgramCache]: Analyzing trace with hash 773473416, now seen corresponding path program 40 times [2021-11-09 09:40:50,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:40:50,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177851584] [2021-11-09 09:40:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:40:50,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:40:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:40:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:40:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:40:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:40:51,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:40:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:40:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:40:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:40:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:40:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:40:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:40:51,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:40:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:40:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:40:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:40:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:40:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:40:51,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:40:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 76269 backedges. 15019 proven. 838 refuted. 0 times theorem prover too weak. 60412 trivial. 0 not checked. [2021-11-09 09:40:51,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:40:51,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177851584] [2021-11-09 09:40:51,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177851584] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:40:51,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189050399] [2021-11-09 09:40:51,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:40:51,672 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:40:51,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:40:51,677 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:40:51,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-09 09:40:58,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:40:58,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:40:58,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 2225 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-09 09:40:58,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 76269 backedges. 14936 proven. 2668 refuted. 0 times theorem prover too weak. 58665 trivial. 0 not checked. [2021-11-09 09:41:02,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189050399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:02,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:02,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 43] total 64 [2021-11-09 09:41:02,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722549140] [2021-11-09 09:41:02,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-09 09:41:02,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:02,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-09 09:41:02,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=778, Invalid=3254, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:41:02,229 INFO L87 Difference]: Start difference. First operand 1056 states and 1062 transitions. Second operand has 64 states, 64 states have (on average 4.671875) internal successors, (299), 62 states have internal predecessors, (299), 18 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) [2021-11-09 09:41:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:04,587 INFO L93 Difference]: Finished difference Result 1181 states and 1188 transitions. [2021-11-09 09:41:04,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-09 09:41:04,588 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 4.671875) internal successors, (299), 62 states have internal predecessors, (299), 18 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) Word has length 1037 [2021-11-09 09:41:04,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:04,591 INFO L225 Difference]: With dead ends: 1181 [2021-11-09 09:41:04,591 INFO L226 Difference]: Without dead ends: 1181 [2021-11-09 09:41:04,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1152 GetRequests, 1046 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2365 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2277, Invalid=9065, Unknown=0, NotChecked=0, Total=11342 [2021-11-09 09:41:04,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-11-09 09:41:04,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1162. [2021-11-09 09:41:04,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1122 states have (on average 1.0071301247771836) internal successors, (1130), 1123 states have internal predecessors, (1130), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-09 09:41:04,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1169 transitions. [2021-11-09 09:41:04,605 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1169 transitions. Word has length 1037 [2021-11-09 09:41:04,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:04,605 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1169 transitions. [2021-11-09 09:41:04,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 4.671875) internal successors, (299), 62 states have internal predecessors, (299), 18 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (18), 18 states have call predecessors, (18), 17 states have call successors, (18) [2021-11-09 09:41:04,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1169 transitions. [2021-11-09 09:41:04,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1134 [2021-11-09 09:41:04,614 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:04,615 INFO L513 BasicCegarLoop]: trace histogram [188, 187, 187, 187, 187, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:04,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-11-09 09:41:04,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-11-09 09:41:04,816 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:41:04,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:04,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1908118869, now seen corresponding path program 41 times [2021-11-09 09:41:04,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:04,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682094427] [2021-11-09 09:41:04,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:04,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:41:05,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:41:05,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:41:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:41:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:41:05,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:41:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:41:05,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:41:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:41:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:41:05,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:41:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:41:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:41:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:41:05,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:41:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:41:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:41:05,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:05,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 943 [2021-11-09 09:41:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 92072 backedges. 30054 proven. 789 refuted. 0 times theorem prover too weak. 61229 trivial. 0 not checked. [2021-11-09 09:41:06,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:06,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682094427] [2021-11-09 09:41:06,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682094427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:06,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73302646] [2021-11-09 09:41:06,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:41:06,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:06,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:06,117 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:06,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-09 09:41:17,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-11-09 09:41:17,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:17,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 2807 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-09 09:41:17,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:21,571 INFO L134 CoverageAnalysis]: Checked inductivity of 92072 backedges. 34266 proven. 6057 refuted. 0 times theorem prover too weak. 51749 trivial. 0 not checked. [2021-11-09 09:41:21,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73302646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:21,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:21,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 42] total 72 [2021-11-09 09:41:21,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238016482] [2021-11-09 09:41:21,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-09 09:41:21,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:21,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-09 09:41:21,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=847, Invalid=4265, Unknown=0, NotChecked=0, Total=5112 [2021-11-09 09:41:21,575 INFO L87 Difference]: Start difference. First operand 1162 states and 1169 transitions. Second operand has 72 states, 72 states have (on average 4.958333333333333) internal successors, (357), 71 states have internal predecessors, (357), 19 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2021-11-09 09:41:24,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:24,966 INFO L93 Difference]: Finished difference Result 1183 states and 1188 transitions. [2021-11-09 09:41:24,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-09 09:41:24,966 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 4.958333333333333) internal successors, (357), 71 states have internal predecessors, (357), 19 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 1133 [2021-11-09 09:41:24,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:24,970 INFO L225 Difference]: With dead ends: 1183 [2021-11-09 09:41:24,971 INFO L226 Difference]: Without dead ends: 1177 [2021-11-09 09:41:24,972 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1258 GetRequests, 1135 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3790 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2628, Invalid=12624, Unknown=0, NotChecked=0, Total=15252 [2021-11-09 09:41:24,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-11-09 09:41:24,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1162. [2021-11-09 09:41:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1122 states have (on average 1.0053475935828877) internal successors, (1128), 1123 states have internal predecessors, (1128), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-09 09:41:24,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1167 transitions. [2021-11-09 09:41:24,986 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1167 transitions. Word has length 1133 [2021-11-09 09:41:24,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:24,987 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1167 transitions. [2021-11-09 09:41:24,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 4.958333333333333) internal successors, (357), 71 states have internal predecessors, (357), 19 states have call successors, (22), 3 states have call predecessors, (22), 3 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2021-11-09 09:41:24,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1167 transitions. [2021-11-09 09:41:25,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1139 [2021-11-09 09:41:25,002 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:25,003 INFO L513 BasicCegarLoop]: trace histogram [189, 188, 188, 188, 188, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:25,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:25,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-09 09:41:25,223 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:41:25,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:25,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1485351030, now seen corresponding path program 42 times [2021-11-09 09:41:25,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:25,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007709513] [2021-11-09 09:41:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:25,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:41:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:41:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:41:26,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:41:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:41:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:41:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:41:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:41:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:41:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:41:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:41:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:41:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:41:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:41:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:41:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:41:26,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:41:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 943 [2021-11-09 09:41:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:26,292 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 15963 proven. 801 refuted. 0 times theorem prover too weak. 76262 trivial. 0 not checked. [2021-11-09 09:41:26,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:26,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007709513] [2021-11-09 09:41:26,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007709513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:26,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998717916] [2021-11-09 09:41:26,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:41:26,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:26,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:26,297 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:26,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-09 09:41:35,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-11-09 09:41:35,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:41:35,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 2154 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-09 09:41:35,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 93026 backedges. 15963 proven. 801 refuted. 0 times theorem prover too weak. 76262 trivial. 0 not checked. [2021-11-09 09:41:38,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998717916] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:38,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:38,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 41 [2021-11-09 09:41:38,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796784973] [2021-11-09 09:41:38,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 09:41:38,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:38,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 09:41:38,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 09:41:38,273 INFO L87 Difference]: Start difference. First operand 1162 states and 1167 transitions. Second operand has 42 states, 41 states have (on average 4.975609756097561) internal successors, (204), 41 states have internal predecessors, (204), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:41:39,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:39,758 INFO L93 Difference]: Finished difference Result 1185 states and 1191 transitions. [2021-11-09 09:41:39,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-09 09:41:39,758 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.975609756097561) internal successors, (204), 41 states have internal predecessors, (204), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 1138 [2021-11-09 09:41:39,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:39,762 INFO L225 Difference]: With dead ends: 1185 [2021-11-09 09:41:39,763 INFO L226 Difference]: Without dead ends: 1185 [2021-11-09 09:41:39,763 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1212 GetRequests, 1153 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=725, Invalid=2935, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 09:41:39,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1185 states. [2021-11-09 09:41:39,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1185 to 1167. [2021-11-09 09:41:39,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1127 states have (on average 1.0062111801242235) internal successors, (1134), 1128 states have internal predecessors, (1134), 20 states have call successors, (20), 20 states have call predecessors, (20), 19 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-09 09:41:39,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1173 transitions. [2021-11-09 09:41:39,777 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1173 transitions. Word has length 1138 [2021-11-09 09:41:39,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:39,777 INFO L470 AbstractCegarLoop]: Abstraction has 1167 states and 1173 transitions. [2021-11-09 09:41:39,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.975609756097561) internal successors, (204), 41 states have internal predecessors, (204), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:41:39,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1173 transitions. [2021-11-09 09:41:39,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1144 [2021-11-09 09:41:39,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:39,793 INFO L513 BasicCegarLoop]: trace histogram [190, 189, 189, 189, 189, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:39,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:40,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-09 09:41:40,017 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:41:40,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:40,017 INFO L85 PathProgramCache]: Analyzing trace with hash -831036507, now seen corresponding path program 43 times [2021-11-09 09:41:40,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:40,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735490661] [2021-11-09 09:41:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:40,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:41:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:41:41,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:41:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:41:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:41:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:41:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:41:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:41:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:41:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:41:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:41:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:41:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:41:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:41:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:41:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:41:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:41:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 943 [2021-11-09 09:41:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 93985 backedges. 17649 proven. 941 refuted. 0 times theorem prover too weak. 75395 trivial. 0 not checked. [2021-11-09 09:41:41,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:41,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735490661] [2021-11-09 09:41:41,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735490661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:41,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449345365] [2021-11-09 09:41:41,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:41:41,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:41,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:41,442 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:41,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-09 09:41:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:49,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 2892 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-09 09:41:49,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:41:53,297 INFO L134 CoverageAnalysis]: Checked inductivity of 93985 backedges. 17740 proven. 850 refuted. 0 times theorem prover too weak. 75395 trivial. 0 not checked. [2021-11-09 09:41:53,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449345365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:53,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:41:53,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 63 [2021-11-09 09:41:53,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921350545] [2021-11-09 09:41:53,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-09 09:41:53,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:41:53,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-09 09:41:53,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=846, Invalid=3060, Unknown=0, NotChecked=0, Total=3906 [2021-11-09 09:41:53,301 INFO L87 Difference]: Start difference. First operand 1167 states and 1173 transitions. Second operand has 63 states, 63 states have (on average 4.761904761904762) internal successors, (300), 61 states have internal predecessors, (300), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-09 09:41:55,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:41:55,339 INFO L93 Difference]: Finished difference Result 1292 states and 1299 transitions. [2021-11-09 09:41:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-09 09:41:55,340 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 4.761904761904762) internal successors, (300), 61 states have internal predecessors, (300), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 1143 [2021-11-09 09:41:55,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:41:55,346 INFO L225 Difference]: With dead ends: 1292 [2021-11-09 09:41:55,346 INFO L226 Difference]: Without dead ends: 1292 [2021-11-09 09:41:55,348 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1259 GetRequests, 1159 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2480, Invalid=7822, Unknown=0, NotChecked=0, Total=10302 [2021-11-09 09:41:55,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2021-11-09 09:41:55,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1273. [2021-11-09 09:41:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1231 states have (on average 1.0064987814784727) internal successors, (1239), 1232 states have internal predecessors, (1239), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-09 09:41:55,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 1280 transitions. [2021-11-09 09:41:55,370 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 1280 transitions. Word has length 1143 [2021-11-09 09:41:55,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:41:55,372 INFO L470 AbstractCegarLoop]: Abstraction has 1273 states and 1280 transitions. [2021-11-09 09:41:55,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 4.761904761904762) internal successors, (300), 61 states have internal predecessors, (300), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-11-09 09:41:55,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 1280 transitions. [2021-11-09 09:41:55,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1245 [2021-11-09 09:41:55,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:41:55,390 INFO L513 BasicCegarLoop]: trace histogram [208, 207, 207, 207, 207, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:41:55,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-09 09:41:55,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:55,617 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:41:55,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:41:55,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1962245081, now seen corresponding path program 44 times [2021-11-09 09:41:55,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:41:55,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384123419] [2021-11-09 09:41:55,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:41:55,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:41:55,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:41:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:41:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:41:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:41:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:41:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:41:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:41:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:41:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:41:56,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:41:56,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:41:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:41:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:41:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:41:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:41:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:41:56,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:41:56,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 943 [2021-11-09 09:41:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1044 [2021-11-09 09:41:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:41:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 112500 backedges. 35314 proven. 881 refuted. 0 times theorem prover too weak. 76305 trivial. 0 not checked. [2021-11-09 09:41:56,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:41:56,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384123419] [2021-11-09 09:41:56,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384123419] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:41:56,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466617244] [2021-11-09 09:41:56,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:41:56,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:41:56,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:41:56,873 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:41:56,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-09 09:42:05,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:42:05,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:42:05,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 3141 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 09:42:06,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:42:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 112500 backedges. 35412 proven. 783 refuted. 0 times theorem prover too weak. 76305 trivial. 0 not checked. [2021-11-09 09:42:09,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466617244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:09,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:42:09,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 61 [2021-11-09 09:42:09,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465669572] [2021-11-09 09:42:09,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-09 09:42:09,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:09,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-09 09:42:09,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=805, Invalid=2855, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 09:42:09,770 INFO L87 Difference]: Start difference. First operand 1273 states and 1280 transitions. Second operand has 61 states, 61 states have (on average 4.967213114754099) internal successors, (303), 60 states have internal predecessors, (303), 21 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-09 09:42:11,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:11,626 INFO L93 Difference]: Finished difference Result 1294 states and 1299 transitions. [2021-11-09 09:42:11,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-09 09:42:11,627 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 4.967213114754099) internal successors, (303), 60 states have internal predecessors, (303), 21 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 1244 [2021-11-09 09:42:11,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:11,630 INFO L225 Difference]: With dead ends: 1294 [2021-11-09 09:42:11,630 INFO L226 Difference]: Without dead ends: 1288 [2021-11-09 09:42:11,631 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1359 GetRequests, 1260 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2384 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2253, Invalid=7647, Unknown=0, NotChecked=0, Total=9900 [2021-11-09 09:42:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1288 states. [2021-11-09 09:42:11,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1288 to 1273. [2021-11-09 09:42:11,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1231 states have (on average 1.0048740861088545) internal successors, (1237), 1232 states have internal predecessors, (1237), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-09 09:42:11,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 1278 transitions. [2021-11-09 09:42:11,645 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 1278 transitions. Word has length 1244 [2021-11-09 09:42:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:11,646 INFO L470 AbstractCegarLoop]: Abstraction has 1273 states and 1278 transitions. [2021-11-09 09:42:11,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 4.967213114754099) internal successors, (303), 60 states have internal predecessors, (303), 21 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-09 09:42:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 1278 transitions. [2021-11-09 09:42:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1250 [2021-11-09 09:42:11,657 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:11,657 INFO L513 BasicCegarLoop]: trace histogram [209, 208, 208, 208, 208, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:11,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-11-09 09:42:11,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:11,858 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:42:11,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:11,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1184766334, now seen corresponding path program 45 times [2021-11-09 09:42:11,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:11,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475205319] [2021-11-09 09:42:11,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:11,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:42:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:42:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:42:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:42:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:42:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:42:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:42:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:42:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:42:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:42:12,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:42:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:42:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:42:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:42:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:42:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:42:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:42:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 943 [2021-11-09 09:42:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1044 [2021-11-09 09:42:12,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:12,916 INFO L134 CoverageAnalysis]: Checked inductivity of 113555 backedges. 18693 proven. 893 refuted. 0 times theorem prover too weak. 93969 trivial. 0 not checked. [2021-11-09 09:42:12,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:12,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475205319] [2021-11-09 09:42:12,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475205319] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:12,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990714521] [2021-11-09 09:42:12,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:42:12,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:12,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:42:12,918 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:42:12,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-09 09:42:22,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-11-09 09:42:22,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:42:22,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-09 09:42:22,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:42:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 113555 backedges. 18693 proven. 893 refuted. 0 times theorem prover too weak. 93969 trivial. 0 not checked. [2021-11-09 09:42:25,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990714521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:25,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:42:25,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 43 [2021-11-09 09:42:25,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12926991] [2021-11-09 09:42:25,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 09:42:25,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:25,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 09:42:25,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 09:42:25,413 INFO L87 Difference]: Start difference. First operand 1273 states and 1278 transitions. Second operand has 44 states, 43 states have (on average 4.976744186046512) internal successors, (214), 43 states have internal predecessors, (214), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:42:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:26,946 INFO L93 Difference]: Finished difference Result 1296 states and 1302 transitions. [2021-11-09 09:42:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 09:42:26,946 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 4.976744186046512) internal successors, (214), 43 states have internal predecessors, (214), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 1249 [2021-11-09 09:42:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:26,951 INFO L225 Difference]: With dead ends: 1296 [2021-11-09 09:42:26,951 INFO L226 Difference]: Without dead ends: 1296 [2021-11-09 09:42:26,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1327 GetRequests, 1265 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=793, Invalid=3239, Unknown=0, NotChecked=0, Total=4032 [2021-11-09 09:42:26,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-11-09 09:42:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1278. [2021-11-09 09:42:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1236 states have (on average 1.005663430420712) internal successors, (1243), 1237 states have internal predecessors, (1243), 21 states have call successors, (21), 21 states have call predecessors, (21), 20 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-09 09:42:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 1284 transitions. [2021-11-09 09:42:26,971 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 1284 transitions. Word has length 1249 [2021-11-09 09:42:26,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:26,972 INFO L470 AbstractCegarLoop]: Abstraction has 1278 states and 1284 transitions. [2021-11-09 09:42:26,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 4.976744186046512) internal successors, (214), 43 states have internal predecessors, (214), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:42:26,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 1284 transitions. [2021-11-09 09:42:26,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1255 [2021-11-09 09:42:26,990 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:26,991 INFO L513 BasicCegarLoop]: trace histogram [210, 209, 209, 209, 209, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:27,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-09 09:42:27,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:27,205 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:42:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:27,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1445425069, now seen corresponding path program 46 times [2021-11-09 09:42:27,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:27,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686339823] [2021-11-09 09:42:27,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:27,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:42:28,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:42:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:42:28,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:42:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:42:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:42:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:42:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:42:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:42:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:42:28,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:42:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:42:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:42:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:42:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:42:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:42:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:42:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:28,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 943 [2021-11-09 09:42:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:29,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1044 [2021-11-09 09:42:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:29,035 INFO L134 CoverageAnalysis]: Checked inductivity of 114615 backedges. 20568 proven. 1050 refuted. 0 times theorem prover too weak. 92997 trivial. 0 not checked. [2021-11-09 09:42:29,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:29,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686339823] [2021-11-09 09:42:29,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686339823] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:29,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610500934] [2021-11-09 09:42:29,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:42:29,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:29,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:42:29,041 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:42:29,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-09 09:42:38,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:42:38,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:42:39,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 2675 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 09:42:39,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:42:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 114615 backedges. 20477 proven. 3307 refuted. 0 times theorem prover too weak. 90831 trivial. 0 not checked. [2021-11-09 09:42:43,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610500934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:43,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:42:43,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 47] total 70 [2021-11-09 09:42:43,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950581490] [2021-11-09 09:42:43,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-09 09:42:43,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:42:43,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-09 09:42:43,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=942, Invalid=3888, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 09:42:43,161 INFO L87 Difference]: Start difference. First operand 1278 states and 1284 transitions. Second operand has 70 states, 70 states have (on average 4.7) internal successors, (329), 68 states have internal predecessors, (329), 20 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (20), 20 states have call predecessors, (20), 19 states have call successors, (20) [2021-11-09 09:42:45,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:42:45,841 INFO L93 Difference]: Finished difference Result 1408 states and 1415 transitions. [2021-11-09 09:42:45,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-09 09:42:45,842 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 4.7) internal successors, (329), 68 states have internal predecessors, (329), 20 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (20), 20 states have call predecessors, (20), 19 states have call successors, (20) Word has length 1254 [2021-11-09 09:42:45,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:42:45,847 INFO L225 Difference]: With dead ends: 1408 [2021-11-09 09:42:45,847 INFO L226 Difference]: Without dead ends: 1408 [2021-11-09 09:42:45,849 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1381 GetRequests, 1265 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2808 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2759, Invalid=10813, Unknown=0, NotChecked=0, Total=13572 [2021-11-09 09:42:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-11-09 09:42:45,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1389. [2021-11-09 09:42:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1345 states have (on average 1.0059479553903345) internal successors, (1353), 1346 states have internal predecessors, (1353), 22 states have call successors, (22), 22 states have call predecessors, (22), 21 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-09 09:42:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1396 transitions. [2021-11-09 09:42:45,864 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1396 transitions. Word has length 1254 [2021-11-09 09:42:45,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:42:45,865 INFO L470 AbstractCegarLoop]: Abstraction has 1389 states and 1396 transitions. [2021-11-09 09:42:45,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 4.7) internal successors, (329), 68 states have internal predecessors, (329), 20 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (20), 20 states have call predecessors, (20), 19 states have call successors, (20) [2021-11-09 09:42:45,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1396 transitions. [2021-11-09 09:42:45,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1361 [2021-11-09 09:42:45,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:42:45,877 INFO L513 BasicCegarLoop]: trace histogram [229, 228, 228, 228, 228, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:42:45,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-09 09:42:46,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-11-09 09:42:46,078 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:42:46,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:42:46,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1077882064, now seen corresponding path program 47 times [2021-11-09 09:42:46,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:42:46,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756446308] [2021-11-09 09:42:46,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:42:46,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:42:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:42:46,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:42:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:42:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:42:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:42:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:42:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:42:46,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:42:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:42:46,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:42:46,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:42:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:42:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:42:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:42:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:42:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:42:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:42:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 943 [2021-11-09 09:42:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1044 [2021-11-09 09:42:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:46,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1150 [2021-11-09 09:42:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:42:47,544 INFO L134 CoverageAnalysis]: Checked inductivity of 136135 backedges. 41152 proven. 978 refuted. 0 times theorem prover too weak. 94005 trivial. 0 not checked. [2021-11-09 09:42:47,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:42:47,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756446308] [2021-11-09 09:42:47,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756446308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:42:47,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567978715] [2021-11-09 09:42:47,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:42:47,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:42:47,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:42:47,547 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:42:47,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-09 09:43:07,568 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-11-09 09:43:07,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:43:07,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 3365 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 09:43:07,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:43:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 136135 backedges. 45244 proven. 8842 refuted. 0 times theorem prover too weak. 82049 trivial. 0 not checked. [2021-11-09 09:43:12,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567978715] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:12,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:43:12,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 46] total 78 [2021-11-09 09:43:12,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713623199] [2021-11-09 09:43:12,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-09 09:43:12,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:12,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-09 09:43:12,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=4999, Unknown=0, NotChecked=0, Total=6006 [2021-11-09 09:43:12,349 INFO L87 Difference]: Start difference. First operand 1389 states and 1396 transitions. Second operand has 78 states, 78 states have (on average 4.961538461538462) internal successors, (387), 77 states have internal predecessors, (387), 21 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2021-11-09 09:43:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:15,570 INFO L93 Difference]: Finished difference Result 1410 states and 1415 transitions. [2021-11-09 09:43:15,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-09 09:43:15,570 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 4.961538461538462) internal successors, (387), 77 states have internal predecessors, (387), 21 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 1360 [2021-11-09 09:43:15,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:15,576 INFO L225 Difference]: With dead ends: 1410 [2021-11-09 09:43:15,576 INFO L226 Difference]: Without dead ends: 1404 [2021-11-09 09:43:15,579 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1497 GetRequests, 1364 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4454 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3117, Invalid=14705, Unknown=0, NotChecked=0, Total=17822 [2021-11-09 09:43:15,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-11-09 09:43:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1389. [2021-11-09 09:43:15,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 1345 states have (on average 1.0044609665427509) internal successors, (1351), 1346 states have internal predecessors, (1351), 22 states have call successors, (22), 22 states have call predecessors, (22), 21 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-09 09:43:15,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1394 transitions. [2021-11-09 09:43:15,594 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1394 transitions. Word has length 1360 [2021-11-09 09:43:15,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:15,595 INFO L470 AbstractCegarLoop]: Abstraction has 1389 states and 1394 transitions. [2021-11-09 09:43:15,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 4.961538461538462) internal successors, (387), 77 states have internal predecessors, (387), 21 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2021-11-09 09:43:15,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1394 transitions. [2021-11-09 09:43:15,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1366 [2021-11-09 09:43:15,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:15,609 INFO L513 BasicCegarLoop]: trace histogram [230, 229, 229, 229, 229, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:15,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-09 09:43:15,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-09 09:43:15,810 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:43:15,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:15,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1160826203, now seen corresponding path program 48 times [2021-11-09 09:43:15,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:15,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792911409] [2021-11-09 09:43:15,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:15,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:16,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:16,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:43:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:16,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:43:16,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:16,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:43:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:16,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:43:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:16,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:43:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:16,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:43:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:17,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:43:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:17,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:43:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:17,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:43:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:17,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:43:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:17,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:43:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:17,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:43:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:17,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:43:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:17,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:43:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:17,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:43:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:17,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:43:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:17,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:43:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:17,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 943 [2021-11-09 09:43:17,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:17,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1044 [2021-11-09 09:43:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:17,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1150 [2021-11-09 09:43:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 137296 backedges. 21717 proven. 990 refuted. 0 times theorem prover too weak. 114589 trivial. 0 not checked. [2021-11-09 09:43:17,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:17,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792911409] [2021-11-09 09:43:17,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792911409] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:17,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124905370] [2021-11-09 09:43:17,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:43:17,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:17,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:17,137 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:43:17,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-09 09:43:29,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2021-11-09 09:43:29,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:43:29,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 2526 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-09 09:43:29,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:43:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 137296 backedges. 21717 proven. 990 refuted. 0 times theorem prover too weak. 114589 trivial. 0 not checked. [2021-11-09 09:43:32,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124905370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:32,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:43:32,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2021-11-09 09:43:32,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184938386] [2021-11-09 09:43:32,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 09:43:32,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:32,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 09:43:32,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 09:43:32,763 INFO L87 Difference]: Start difference. First operand 1389 states and 1394 transitions. Second operand has 46 states, 45 states have (on average 4.977777777777778) internal successors, (224), 45 states have internal predecessors, (224), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:43:34,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:34,407 INFO L93 Difference]: Finished difference Result 1412 states and 1418 transitions. [2021-11-09 09:43:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 09:43:34,408 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 4.977777777777778) internal successors, (224), 45 states have internal predecessors, (224), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 1365 [2021-11-09 09:43:34,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:34,413 INFO L225 Difference]: With dead ends: 1412 [2021-11-09 09:43:34,413 INFO L226 Difference]: Without dead ends: 1412 [2021-11-09 09:43:34,414 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1447 GetRequests, 1382 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=864, Invalid=3558, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 09:43:34,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2021-11-09 09:43:34,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1394. [2021-11-09 09:43:34,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1394 states, 1350 states have (on average 1.0051851851851852) internal successors, (1357), 1351 states have internal predecessors, (1357), 22 states have call successors, (22), 22 states have call predecessors, (22), 21 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-09 09:43:34,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 1400 transitions. [2021-11-09 09:43:34,426 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 1400 transitions. Word has length 1365 [2021-11-09 09:43:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:34,427 INFO L470 AbstractCegarLoop]: Abstraction has 1394 states and 1400 transitions. [2021-11-09 09:43:34,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 4.977777777777778) internal successors, (224), 45 states have internal predecessors, (224), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:43:34,427 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 1400 transitions. [2021-11-09 09:43:34,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1371 [2021-11-09 09:43:34,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:34,441 INFO L513 BasicCegarLoop]: trace histogram [231, 230, 230, 230, 230, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:34,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-09 09:43:34,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-09 09:43:34,642 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:43:34,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:34,642 INFO L85 PathProgramCache]: Analyzing trace with hash 484655466, now seen corresponding path program 49 times [2021-11-09 09:43:34,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:34,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596114052] [2021-11-09 09:43:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:34,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:43:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:43:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:43:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:43:35,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:43:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:43:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:43:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:43:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:43:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:43:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:43:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:43:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:43:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:43:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:43:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:43:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:43:35,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 943 [2021-11-09 09:43:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1044 [2021-11-09 09:43:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:35,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1150 [2021-11-09 09:43:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:36,013 INFO L134 CoverageAnalysis]: Checked inductivity of 138462 backedges. 23791 proven. 1165 refuted. 0 times theorem prover too weak. 113506 trivial. 0 not checked. [2021-11-09 09:43:36,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:36,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596114052] [2021-11-09 09:43:36,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596114052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:36,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478076744] [2021-11-09 09:43:36,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:43:36,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:36,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:36,015 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:43:36,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-09 09:43:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:46,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 3450 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 09:43:46,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:43:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 138462 backedges. 23892 proven. 1064 refuted. 0 times theorem prover too weak. 113506 trivial. 0 not checked. [2021-11-09 09:43:50,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478076744] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:50,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:43:50,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 69 [2021-11-09 09:43:50,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744137047] [2021-11-09 09:43:50,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-09 09:43:50,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:43:50,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-09 09:43:50,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1018, Invalid=3674, Unknown=0, NotChecked=0, Total=4692 [2021-11-09 09:43:50,921 INFO L87 Difference]: Start difference. First operand 1394 states and 1400 transitions. Second operand has 69 states, 69 states have (on average 4.782608695652174) internal successors, (330), 67 states have internal predecessors, (330), 22 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-09 09:43:52,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:43:52,983 INFO L93 Difference]: Finished difference Result 1529 states and 1536 transitions. [2021-11-09 09:43:52,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-09 09:43:52,984 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 4.782608695652174) internal successors, (330), 67 states have internal predecessors, (330), 22 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 1370 [2021-11-09 09:43:52,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:43:52,988 INFO L225 Difference]: With dead ends: 1529 [2021-11-09 09:43:52,989 INFO L226 Difference]: Without dead ends: 1529 [2021-11-09 09:43:52,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1498 GetRequests, 1388 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2992, Invalid=9440, Unknown=0, NotChecked=0, Total=12432 [2021-11-09 09:43:52,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2021-11-09 09:43:53,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1510. [2021-11-09 09:43:53,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1464 states have (on average 1.005464480874317) internal successors, (1472), 1465 states have internal predecessors, (1472), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-09 09:43:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 1517 transitions. [2021-11-09 09:43:53,015 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 1517 transitions. Word has length 1370 [2021-11-09 09:43:53,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:43:53,016 INFO L470 AbstractCegarLoop]: Abstraction has 1510 states and 1517 transitions. [2021-11-09 09:43:53,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 4.782608695652174) internal successors, (330), 67 states have internal predecessors, (330), 22 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-09 09:43:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 1517 transitions. [2021-11-09 09:43:53,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1482 [2021-11-09 09:43:53,038 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:43:53,039 INFO L513 BasicCegarLoop]: trace histogram [251, 250, 250, 250, 250, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:43:53,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-09 09:43:53,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-09 09:43:53,241 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:43:53,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:43:53,241 INFO L85 PathProgramCache]: Analyzing trace with hash -667535262, now seen corresponding path program 50 times [2021-11-09 09:43:53,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:43:53,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237977750] [2021-11-09 09:43:53,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:43:53,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:43:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:43:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:43:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:43:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:43:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:43:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:43:54,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:43:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:43:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:43:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:43:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:43:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:43:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:43:54,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:43:54,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:43:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:43:54,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:43:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 943 [2021-11-09 09:43:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1044 [2021-11-09 09:43:54,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1150 [2021-11-09 09:43:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:54,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1261 [2021-11-09 09:43:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:43:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 163295 backedges. 47598 proven. 1080 refuted. 0 times theorem prover too weak. 114617 trivial. 0 not checked. [2021-11-09 09:43:55,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:43:55,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237977750] [2021-11-09 09:43:55,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237977750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:43:55,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657189481] [2021-11-09 09:43:55,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:43:55,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:43:55,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:43:55,190 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:43:55,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-09 09:44:06,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:44:06,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:06,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 3723 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-09 09:44:06,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 163295 backedges. 47708 proven. 970 refuted. 0 times theorem prover too weak. 114617 trivial. 0 not checked. [2021-11-09 09:44:10,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657189481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:10,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:10,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 67 [2021-11-09 09:44:10,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204675076] [2021-11-09 09:44:10,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-09 09:44:10,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:10,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-09 09:44:10,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=973, Invalid=3449, Unknown=0, NotChecked=0, Total=4422 [2021-11-09 09:44:10,935 INFO L87 Difference]: Start difference. First operand 1510 states and 1517 transitions. Second operand has 67 states, 67 states have (on average 4.970149253731344) internal successors, (333), 66 states have internal predecessors, (333), 23 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-09 09:44:12,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:12,781 INFO L93 Difference]: Finished difference Result 1531 states and 1536 transitions. [2021-11-09 09:44:12,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-09 09:44:12,781 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 4.970149253731344) internal successors, (333), 66 states have internal predecessors, (333), 23 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 1481 [2021-11-09 09:44:12,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:12,785 INFO L225 Difference]: With dead ends: 1531 [2021-11-09 09:44:12,785 INFO L226 Difference]: Without dead ends: 1525 [2021-11-09 09:44:12,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1608 GetRequests, 1499 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2930 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2720, Invalid=9270, Unknown=0, NotChecked=0, Total=11990 [2021-11-09 09:44:12,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-11-09 09:44:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1510. [2021-11-09 09:44:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1464 states have (on average 1.0040983606557377) internal successors, (1470), 1465 states have internal predecessors, (1470), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-09 09:44:12,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 1515 transitions. [2021-11-09 09:44:12,800 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 1515 transitions. Word has length 1481 [2021-11-09 09:44:12,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:12,801 INFO L470 AbstractCegarLoop]: Abstraction has 1510 states and 1515 transitions. [2021-11-09 09:44:12,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 4.970149253731344) internal successors, (333), 66 states have internal predecessors, (333), 23 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-09 09:44:12,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 1515 transitions. [2021-11-09 09:44:12,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1487 [2021-11-09 09:44:12,817 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:12,817 INFO L513 BasicCegarLoop]: trace histogram [252, 251, 251, 251, 251, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:12,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:13,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-09 09:44:13,018 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:44:13,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:13,019 INFO L85 PathProgramCache]: Analyzing trace with hash 9778855, now seen corresponding path program 51 times [2021-11-09 09:44:13,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:13,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614915729] [2021-11-09 09:44:13,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:13,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:44:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:44:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:44:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:44:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:44:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:44:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:44:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:44:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:44:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:44:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:44:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:44:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:44:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:44:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:44:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:44:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:44:14,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 943 [2021-11-09 09:44:14,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1044 [2021-11-09 09:44:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1150 [2021-11-09 09:44:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1261 [2021-11-09 09:44:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 164567 backedges. 25050 proven. 1092 refuted. 0 times theorem prover too weak. 138425 trivial. 0 not checked. [2021-11-09 09:44:14,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:14,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614915729] [2021-11-09 09:44:14,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614915729] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:14,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614855431] [2021-11-09 09:44:14,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:44:14,462 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:14,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:14,464 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:14,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-09 09:44:26,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-09 09:44:26,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:26,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1614 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 09:44:26,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 164567 backedges. 25050 proven. 1092 refuted. 0 times theorem prover too weak. 138425 trivial. 0 not checked. [2021-11-09 09:44:30,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614855431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:30,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:30,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 47 [2021-11-09 09:44:30,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237399195] [2021-11-09 09:44:30,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-09 09:44:30,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:30,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-09 09:44:30,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2021-11-09 09:44:30,317 INFO L87 Difference]: Start difference. First operand 1510 states and 1515 transitions. Second operand has 48 states, 47 states have (on average 4.9787234042553195) internal successors, (234), 47 states have internal predecessors, (234), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:44:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:31,935 INFO L93 Difference]: Finished difference Result 1533 states and 1539 transitions. [2021-11-09 09:44:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 09:44:31,935 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.9787234042553195) internal successors, (234), 47 states have internal predecessors, (234), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 1486 [2021-11-09 09:44:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:31,940 INFO L225 Difference]: With dead ends: 1533 [2021-11-09 09:44:31,941 INFO L226 Difference]: Without dead ends: 1533 [2021-11-09 09:44:31,941 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1572 GetRequests, 1504 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=938, Invalid=3892, Unknown=0, NotChecked=0, Total=4830 [2021-11-09 09:44:31,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states. [2021-11-09 09:44:31,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1515. [2021-11-09 09:44:31,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1469 states have (on average 1.0047651463580667) internal successors, (1476), 1470 states have internal predecessors, (1476), 23 states have call successors, (23), 23 states have call predecessors, (23), 22 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-09 09:44:31,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 1521 transitions. [2021-11-09 09:44:31,954 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 1521 transitions. Word has length 1486 [2021-11-09 09:44:31,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:31,955 INFO L470 AbstractCegarLoop]: Abstraction has 1515 states and 1521 transitions. [2021-11-09 09:44:31,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.9787234042553195) internal successors, (234), 47 states have internal predecessors, (234), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:44:31,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 1521 transitions. [2021-11-09 09:44:31,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1492 [2021-11-09 09:44:31,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:31,971 INFO L513 BasicCegarLoop]: trace histogram [253, 252, 252, 252, 252, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:32,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-09 09:44:32,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:32,171 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:44:32,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:32,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1504276136, now seen corresponding path program 52 times [2021-11-09 09:44:32,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:32,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492041312] [2021-11-09 09:44:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:32,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:44:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:44:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:44:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:44:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:44:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:44:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:44:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:44:34,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:44:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:44:34,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:44:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:44:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:44:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:44:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:44:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:44:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:44:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 943 [2021-11-09 09:44:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1044 [2021-11-09 09:44:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1150 [2021-11-09 09:44:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1261 [2021-11-09 09:44:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 165844 backedges. 27333 proven. 1286 refuted. 0 times theorem prover too weak. 137225 trivial. 0 not checked. [2021-11-09 09:44:34,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:34,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492041312] [2021-11-09 09:44:34,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492041312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:34,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886326920] [2021-11-09 09:44:34,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:44:34,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:34,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:34,259 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:34,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-09 09:44:46,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:44:46,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:44:46,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 3165 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 09:44:46,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:44:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 165844 backedges. 27234 proven. 4014 refuted. 0 times theorem prover too weak. 134596 trivial. 0 not checked. [2021-11-09 09:44:51,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886326920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:51,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:44:51,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 51] total 76 [2021-11-09 09:44:51,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102639471] [2021-11-09 09:44:51,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-09 09:44:51,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:44:51,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-09 09:44:51,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=4578, Unknown=0, NotChecked=0, Total=5700 [2021-11-09 09:44:51,419 INFO L87 Difference]: Start difference. First operand 1515 states and 1521 transitions. Second operand has 76 states, 76 states have (on average 4.723684210526316) internal successors, (359), 74 states have internal predecessors, (359), 22 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-09 09:44:54,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:44:54,297 INFO L93 Difference]: Finished difference Result 1655 states and 1662 transitions. [2021-11-09 09:44:54,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-09 09:44:54,297 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 4.723684210526316) internal successors, (359), 74 states have internal predecessors, (359), 22 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) Word has length 1491 [2021-11-09 09:44:54,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:44:54,301 INFO L225 Difference]: With dead ends: 1655 [2021-11-09 09:44:54,301 INFO L226 Difference]: Without dead ends: 1655 [2021-11-09 09:44:54,303 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1630 GetRequests, 1504 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3287 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3289, Invalid=12713, Unknown=0, NotChecked=0, Total=16002 [2021-11-09 09:44:54,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1655 states. [2021-11-09 09:44:54,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1655 to 1636. [2021-11-09 09:44:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1588 states have (on average 1.0050377833753148) internal successors, (1596), 1589 states have internal predecessors, (1596), 24 states have call successors, (24), 24 states have call predecessors, (24), 23 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-09 09:44:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1643 transitions. [2021-11-09 09:44:54,320 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1643 transitions. Word has length 1491 [2021-11-09 09:44:54,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:44:54,321 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 1643 transitions. [2021-11-09 09:44:54,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 4.723684210526316) internal successors, (359), 74 states have internal predecessors, (359), 22 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (22), 22 states have call predecessors, (22), 21 states have call successors, (22) [2021-11-09 09:44:54,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1643 transitions. [2021-11-09 09:44:54,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1608 [2021-11-09 09:44:54,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:44:54,345 INFO L513 BasicCegarLoop]: trace histogram [274, 273, 273, 273, 273, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:44:54,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-11-09 09:44:54,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:54,545 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:44:54,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:44:54,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1747254261, now seen corresponding path program 53 times [2021-11-09 09:44:54,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:44:54,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514702875] [2021-11-09 09:44:54,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:44:54,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:44:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:44:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:44:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:44:55,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:44:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:44:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:44:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:44:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:44:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:44:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:44:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:44:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:44:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:44:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:44:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:44:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:44:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:44:55,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 943 [2021-11-09 09:44:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1044 [2021-11-09 09:44:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1150 [2021-11-09 09:44:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1261 [2021-11-09 09:44:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:55,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1377 [2021-11-09 09:44:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:44:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 194313 backedges. 54682 proven. 1187 refuted. 0 times theorem prover too weak. 138444 trivial. 0 not checked. [2021-11-09 09:44:56,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:44:56,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514702875] [2021-11-09 09:44:56,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514702875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:44:56,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761255351] [2021-11-09 09:44:56,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:44:56,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:44:56,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:44:56,487 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:44:56,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-09 09:45:24,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-11-09 09:45:24,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:45:24,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 3971 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 09:45:24,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 194313 backedges. 54478 proven. 6313 refuted. 0 times theorem prover too weak. 133522 trivial. 0 not checked. [2021-11-09 09:45:29,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761255351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:29,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:45:29,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 50] total 75 [2021-11-09 09:45:29,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702187382] [2021-11-09 09:45:29,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-09 09:45:29,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:29,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-09 09:45:29,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1084, Invalid=4466, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 09:45:29,472 INFO L87 Difference]: Start difference. First operand 1636 states and 1643 transitions. Second operand has 75 states, 75 states have (on average 4.96) internal successors, (372), 74 states have internal predecessors, (372), 23 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2021-11-09 09:45:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:32,304 INFO L93 Difference]: Finished difference Result 1657 states and 1662 transitions. [2021-11-09 09:45:32,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-09 09:45:32,305 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 4.96) internal successors, (372), 74 states have internal predecessors, (372), 23 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 1607 [2021-11-09 09:45:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:32,309 INFO L225 Difference]: With dead ends: 1657 [2021-11-09 09:45:32,310 INFO L226 Difference]: Without dead ends: 1651 [2021-11-09 09:45:32,311 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1747 GetRequests, 1622 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3851 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3308, Invalid=12442, Unknown=0, NotChecked=0, Total=15750 [2021-11-09 09:45:32,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1651 states. [2021-11-09 09:45:32,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1651 to 1636. [2021-11-09 09:45:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1588 states have (on average 1.0037783375314862) internal successors, (1594), 1589 states have internal predecessors, (1594), 24 states have call successors, (24), 24 states have call predecessors, (24), 23 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-09 09:45:32,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 1641 transitions. [2021-11-09 09:45:32,326 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 1641 transitions. Word has length 1607 [2021-11-09 09:45:32,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:32,327 INFO L470 AbstractCegarLoop]: Abstraction has 1636 states and 1641 transitions. [2021-11-09 09:45:32,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 4.96) internal successors, (372), 74 states have internal predecessors, (372), 23 states have call successors, (26), 3 states have call predecessors, (26), 3 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2021-11-09 09:45:32,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 1641 transitions. [2021-11-09 09:45:32,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1613 [2021-11-09 09:45:32,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:32,346 INFO L513 BasicCegarLoop]: trace histogram [275, 274, 274, 274, 274, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:32,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-11-09 09:45:32,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:32,547 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:45:32,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:32,548 INFO L85 PathProgramCache]: Analyzing trace with hash 318401322, now seen corresponding path program 54 times [2021-11-09 09:45:32,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:32,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952362618] [2021-11-09 09:45:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:32,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:45:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:45:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:45:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:45:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:45:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:45:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:45:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:45:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:45:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:45:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:45:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:45:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:45:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:45:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:45:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:45:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:45:33,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 943 [2021-11-09 09:45:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1044 [2021-11-09 09:45:33,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1150 [2021-11-09 09:45:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1261 [2021-11-09 09:45:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1377 [2021-11-09 09:45:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:45:33,875 INFO L134 CoverageAnalysis]: Checked inductivity of 195701 backedges. 28707 proven. 1199 refuted. 0 times theorem prover too weak. 165795 trivial. 0 not checked. [2021-11-09 09:45:33,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:45:33,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952362618] [2021-11-09 09:45:33,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952362618] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:33,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082799509] [2021-11-09 09:45:33,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:45:33,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:33,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:45:33,876 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:45:33,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-09 09:45:53,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2021-11-09 09:45:53,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:45:53,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 3354 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 09:45:53,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:45:57,138 INFO L134 CoverageAnalysis]: Checked inductivity of 195701 backedges. 28707 proven. 1199 refuted. 0 times theorem prover too weak. 165795 trivial. 0 not checked. [2021-11-09 09:45:57,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082799509] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:45:57,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:45:57,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2021-11-09 09:45:57,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626768742] [2021-11-09 09:45:57,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-09 09:45:57,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:45:57,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-09 09:45:57,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2021-11-09 09:45:57,141 INFO L87 Difference]: Start difference. First operand 1636 states and 1641 transitions. Second operand has 50 states, 49 states have (on average 4.979591836734694) internal successors, (244), 49 states have internal predecessors, (244), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:45:58,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:45:58,780 INFO L93 Difference]: Finished difference Result 1659 states and 1665 transitions. [2021-11-09 09:45:58,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 09:45:58,781 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 4.979591836734694) internal successors, (244), 49 states have internal predecessors, (244), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 1612 [2021-11-09 09:45:58,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:45:58,788 INFO L225 Difference]: With dead ends: 1659 [2021-11-09 09:45:58,788 INFO L226 Difference]: Without dead ends: 1659 [2021-11-09 09:45:58,788 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1702 GetRequests, 1631 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1015, Invalid=4241, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 09:45:58,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-11-09 09:45:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1641. [2021-11-09 09:45:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1641 states, 1593 states have (on average 1.0043942247332078) internal successors, (1600), 1594 states have internal predecessors, (1600), 24 states have call successors, (24), 24 states have call predecessors, (24), 23 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-09 09:45:58,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 1647 transitions. [2021-11-09 09:45:58,802 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 1647 transitions. Word has length 1612 [2021-11-09 09:45:58,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:45:58,803 INFO L470 AbstractCegarLoop]: Abstraction has 1641 states and 1647 transitions. [2021-11-09 09:45:58,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 4.979591836734694) internal successors, (244), 49 states have internal predecessors, (244), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-09 09:45:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 1647 transitions. [2021-11-09 09:45:58,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1618 [2021-11-09 09:45:58,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:45:58,825 INFO L513 BasicCegarLoop]: trace histogram [276, 275, 275, 275, 275, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:45:58,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-09 09:45:59,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:45:59,029 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:45:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:45:59,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1712352251, now seen corresponding path program 55 times [2021-11-09 09:45:59,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:45:59,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343254887] [2021-11-09 09:45:59,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:45:59,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:45:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:46:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:46:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:46:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:46:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:46:00,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:46:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:46:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:46:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:46:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:46:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:46:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:46:00,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:46:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:46:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:46:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:46:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:46:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 943 [2021-11-09 09:46:00,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1044 [2021-11-09 09:46:00,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1150 [2021-11-09 09:46:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1261 [2021-11-09 09:46:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1377 [2021-11-09 09:46:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 197094 backedges. 31209 proven. 1413 refuted. 0 times theorem prover too weak. 164472 trivial. 0 not checked. [2021-11-09 09:46:00,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:00,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343254887] [2021-11-09 09:46:00,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343254887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:00,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768318814] [2021-11-09 09:46:00,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:46:00,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:00,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:00,897 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:00,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-09 09:46:14,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:14,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 4056 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-09 09:46:14,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:46:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 197094 backedges. 31320 proven. 1302 refuted. 0 times theorem prover too weak. 164472 trivial. 0 not checked. [2021-11-09 09:46:18,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768318814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:18,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:46:18,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 75 [2021-11-09 09:46:18,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918393741] [2021-11-09 09:46:18,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-09 09:46:18,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:46:18,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-09 09:46:18,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1206, Invalid=4344, Unknown=0, NotChecked=0, Total=5550 [2021-11-09 09:46:18,949 INFO L87 Difference]: Start difference. First operand 1641 states and 1647 transitions. Second operand has 75 states, 75 states have (on average 4.8) internal successors, (360), 73 states have internal predecessors, (360), 24 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-09 09:46:21,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:46:21,588 INFO L93 Difference]: Finished difference Result 1786 states and 1793 transitions. [2021-11-09 09:46:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-09 09:46:21,588 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 4.8) internal successors, (360), 73 states have internal predecessors, (360), 24 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 1617 [2021-11-09 09:46:21,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:46:21,592 INFO L225 Difference]: With dead ends: 1786 [2021-11-09 09:46:21,593 INFO L226 Difference]: Without dead ends: 1786 [2021-11-09 09:46:21,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1757 GetRequests, 1637 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2633 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3552, Invalid=11210, Unknown=0, NotChecked=0, Total=14762 [2021-11-09 09:46:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1786 states. [2021-11-09 09:46:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1786 to 1767. [2021-11-09 09:46:21,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1717 states have (on average 1.0046592894583577) internal successors, (1725), 1718 states have internal predecessors, (1725), 25 states have call successors, (25), 25 states have call predecessors, (25), 24 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2021-11-09 09:46:21,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 1774 transitions. [2021-11-09 09:46:21,610 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 1774 transitions. Word has length 1617 [2021-11-09 09:46:21,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:46:21,610 INFO L470 AbstractCegarLoop]: Abstraction has 1767 states and 1774 transitions. [2021-11-09 09:46:21,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 4.8) internal successors, (360), 73 states have internal predecessors, (360), 24 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-09 09:46:21,611 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 1774 transitions. [2021-11-09 09:46:21,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1739 [2021-11-09 09:46:21,631 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:46:21,632 INFO L513 BasicCegarLoop]: trace histogram [298, 297, 297, 297, 297, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:46:21,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-11-09 09:46:21,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:21,833 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting fooErr0ASSERT_VIOLATIONARRAY_INDEX === [fooErr0ASSERT_VIOLATIONARRAY_INDEX, fooErr1REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION (and 3 more)] === [2021-11-09 09:46:21,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:46:21,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1675122425, now seen corresponding path program 56 times [2021-11-09 09:46:21,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:46:21,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154960073] [2021-11-09 09:46:21,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:46:21,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:46:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:46:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-09 09:46:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-11-09 09:46:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-09 09:46:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-11-09 09:46:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-09 09:46:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2021-11-09 09:46:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-09 09:46:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 259 [2021-11-09 09:46:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 315 [2021-11-09 09:46:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2021-11-09 09:46:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2021-11-09 09:46:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 513 [2021-11-09 09:46:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 589 [2021-11-09 09:46:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2021-11-09 09:46:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2021-11-09 09:46:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-11-09 09:46:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 943 [2021-11-09 09:46:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1044 [2021-11-09 09:46:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1150 [2021-11-09 09:46:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1261 [2021-11-09 09:46:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1377 [2021-11-09 09:46:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:23,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1498 [2021-11-09 09:46:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:46:24,162 INFO L134 CoverageAnalysis]: Checked inductivity of 229537 backedges. 62434 proven. 1299 refuted. 0 times theorem prover too weak. 165804 trivial. 0 not checked. [2021-11-09 09:46:24,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:46:24,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154960073] [2021-11-09 09:46:24,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154960073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:46:24,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417926962] [2021-11-09 09:46:24,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:46:24,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:46:24,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:46:24,164 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:46:24,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dfdd07d-06c4-4598-aa0d-20a34336939a/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process