./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9957a8257e625ece47db9a92e288c6545c023c8bdaf68d0d314c8d86ce47979a --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:20:14,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:20:14,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:20:14,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:20:14,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:20:14,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:20:14,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:20:14,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:20:14,554 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:20:14,555 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:20:14,556 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:20:14,557 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:20:14,558 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:20:14,559 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:20:14,560 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:20:14,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:20:14,562 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:20:14,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:20:14,566 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:20:14,568 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:20:14,570 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:20:14,571 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:20:14,572 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:20:14,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:20:14,577 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:20:14,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:20:14,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:20:14,578 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:20:14,579 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:20:14,580 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:20:14,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:20:14,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:20:14,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:20:14,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:20:14,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:20:14,584 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:20:14,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:20:14,584 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:20:14,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:20:14,585 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:20:14,586 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:20:14,586 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 17:20:14,602 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:20:14,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:20:14,602 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:20:14,602 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:20:14,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 17:20:14,603 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 17:20:14,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:20:14,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:20:14,604 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:20:14,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:20:14,604 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 17:20:14,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:20:14,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 17:20:14,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:20:14,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 17:20:14,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 17:20:14,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 17:20:14,605 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 17:20:14,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:20:14,605 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:20:14,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 17:20:14,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:20:14,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:20:14,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 17:20:14,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:20:14,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:20:14,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 17:20:14,606 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 17:20:14,606 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:20:14,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 17:20:14,606 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 17:20:14,606 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 17:20:14,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 17:20:14,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:20:14,606 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_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9957a8257e625ece47db9a92e288c6545c023c8bdaf68d0d314c8d86ce47979a [2021-12-06 17:20:14,787 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:20:14,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:20:14,806 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:20:14,807 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:20:14,808 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:20:14,809 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2021-12-06 17:20:14,853 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/data/4e2feaef4/96b7f9511d7b49d6bda36e393f7e1a3c/FLAGa74488b8f [2021-12-06 17:20:15,219 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:20:15,219 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i [2021-12-06 17:20:15,223 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/data/4e2feaef4/96b7f9511d7b49d6bda36e393f7e1a3c/FLAGa74488b8f [2021-12-06 17:20:15,234 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/data/4e2feaef4/96b7f9511d7b49d6bda36e393f7e1a3c [2021-12-06 17:20:15,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:20:15,237 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:20:15,238 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:20:15,239 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:20:15,241 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:20:15,242 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:20:15" (1/1) ... [2021-12-06 17:20:15,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fce7509 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:20:15, skipping insertion in model container [2021-12-06 17:20:15,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:20:15" (1/1) ... [2021-12-06 17:20:15,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:20:15,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:20:15,367 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i[853,866] [2021-12-06 17:20:15,376 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:20:15,382 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:20:15,390 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/sv-benchmarks/c/array-examples/standard_strcpy_ground-1.i[853,866] [2021-12-06 17:20:15,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:20:15,404 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:20:15,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:20:15 WrapperNode [2021-12-06 17:20:15,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:20:15,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:20:15,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:20:15,406 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:20:15,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:20:15" (1/1) ... [2021-12-06 17:20:15,416 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:20:15" (1/1) ... [2021-12-06 17:20:15,430 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2021-12-06 17:20:15,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:20:15,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:20:15,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:20:15,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:20:15,437 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:20:15" (1/1) ... [2021-12-06 17:20:15,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:20:15" (1/1) ... [2021-12-06 17:20:15,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:20:15" (1/1) ... [2021-12-06 17:20:15,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:20:15" (1/1) ... [2021-12-06 17:20:15,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:20:15" (1/1) ... [2021-12-06 17:20:15,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:20:15" (1/1) ... [2021-12-06 17:20:15,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:20:15" (1/1) ... [2021-12-06 17:20:15,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:20:15,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:20:15,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:20:15,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:20:15,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:20:15" (1/1) ... [2021-12-06 17:20:15,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 17:20:15,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:20:15,472 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 17:20:15,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 17:20:15,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 17:20:15,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 17:20:15,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 17:20:15,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 17:20:15,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:20:15,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:20:15,510 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 17:20:15,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 17:20:15,559 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:20:15,561 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:20:15,636 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:20:15,640 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:20:15,640 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 17:20:15,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:20:15 BoogieIcfgContainer [2021-12-06 17:20:15,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:20:15,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 17:20:15,643 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 17:20:15,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 17:20:15,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 05:20:15" (1/3) ... [2021-12-06 17:20:15,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1547c20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:20:15, skipping insertion in model container [2021-12-06 17:20:15,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:20:15" (2/3) ... [2021-12-06 17:20:15,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1547c20f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 05:20:15, skipping insertion in model container [2021-12-06 17:20:15,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:20:15" (3/3) ... [2021-12-06 17:20:15,648 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-1.i [2021-12-06 17:20:15,652 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 17:20:15,652 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 17:20:15,686 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 17:20:15,691 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 [2021-12-06 17:20:15,691 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 17:20:15,701 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:15,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 17:20:15,705 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:20:15,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:20:15,706 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:20:15,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:20:15,710 INFO L85 PathProgramCache]: Analyzing trace with hash 254868323, now seen corresponding path program 1 times [2021-12-06 17:20:15,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:20:15,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040685533] [2021-12-06 17:20:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:15,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:20:15,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:20:15,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:20:15,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040685533] [2021-12-06 17:20:15,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040685533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:20:15,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:20:15,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:20:15,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398511823] [2021-12-06 17:20:15,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:20:15,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 17:20:15,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:20:15,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:20:15,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:20:15,865 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:15,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:20:15,887 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2021-12-06 17:20:15,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:20:15,889 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 17:20:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:20:15,895 INFO L225 Difference]: With dead ends: 32 [2021-12-06 17:20:15,895 INFO L226 Difference]: Without dead ends: 14 [2021-12-06 17:20:15,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:20:15,900 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:20:15,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:20:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-12-06 17:20:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-06 17:20:15,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:15,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-12-06 17:20:15,923 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 8 [2021-12-06 17:20:15,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:20:15,924 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-12-06 17:20:15,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:15,924 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-12-06 17:20:15,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 17:20:15,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:20:15,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:20:15,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 17:20:15,925 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:20:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:20:15,926 INFO L85 PathProgramCache]: Analyzing trace with hash -743314847, now seen corresponding path program 1 times [2021-12-06 17:20:15,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:20:15,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564279118] [2021-12-06 17:20:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:15,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:20:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:15,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:20:15,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:20:15,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564279118] [2021-12-06 17:20:15,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564279118] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:20:15,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561574026] [2021-12-06 17:20:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:15,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:20:15,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:20:15,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:20:15,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 17:20:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:16,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:20:16,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:20:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:20:16,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:20:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:20:16,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561574026] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:20:16,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:20:16,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-06 17:20:16,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580975194] [2021-12-06 17:20:16,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:20:16,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 17:20:16,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:20:16,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 17:20:16,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:20:16,101 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:16,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:20:16,124 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-12-06 17:20:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:20:16,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 17:20:16,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:20:16,126 INFO L225 Difference]: With dead ends: 27 [2021-12-06 17:20:16,126 INFO L226 Difference]: Without dead ends: 17 [2021-12-06 17:20:16,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-06 17:20:16,128 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:20:16,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:20:16,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-06 17:20:16,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-12-06 17:20:16,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:16,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-12-06 17:20:16,134 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2021-12-06 17:20:16,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:20:16,134 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-12-06 17:20:16,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:16,134 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-12-06 17:20:16,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-06 17:20:16,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:20:16,135 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:20:16,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:20:16,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:20:16,338 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:20:16,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:20:16,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1408008124, now seen corresponding path program 2 times [2021-12-06 17:20:16,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:20:16,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222805854] [2021-12-06 17:20:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:16,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:20:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:20:16,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:20:16,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222805854] [2021-12-06 17:20:16,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222805854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:20:16,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:20:16,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:20:16,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18819241] [2021-12-06 17:20:16,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:20:16,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 17:20:16,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:20:16,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:20:16,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:20:16,518 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:16,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:20:16,536 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-12-06 17:20:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:20:16,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-06 17:20:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:20:16,537 INFO L225 Difference]: With dead ends: 28 [2021-12-06 17:20:16,537 INFO L226 Difference]: Without dead ends: 20 [2021-12-06 17:20:16,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:20:16,539 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:20:16,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 31 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:20:16,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-06 17:20:16,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-06 17:20:16,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:16,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-12-06 17:20:16,544 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2021-12-06 17:20:16,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:20:16,545 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-12-06 17:20:16,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-12-06 17:20:16,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-06 17:20:16,546 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:20:16,546 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:20:16,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 17:20:16,546 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:20:16,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:20:16,547 INFO L85 PathProgramCache]: Analyzing trace with hash -506219954, now seen corresponding path program 1 times [2021-12-06 17:20:16,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:20:16,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071094941] [2021-12-06 17:20:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:16,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:20:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:20:16,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:20:16,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071094941] [2021-12-06 17:20:16,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071094941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:20:16,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631259790] [2021-12-06 17:20:16,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:16,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:20:16,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:20:16,628 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:20:16,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 17:20:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:16,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 17:20:16,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:20:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:20:16,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:20:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:20:16,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631259790] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:20:16,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:20:16,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-06 17:20:16,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157540148] [2021-12-06 17:20:16,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:20:16,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 17:20:16,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:20:16,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 17:20:16,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:20:16,751 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:16,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:20:16,768 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2021-12-06 17:20:16,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 17:20:16,769 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-12-06 17:20:16,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:20:16,769 INFO L225 Difference]: With dead ends: 39 [2021-12-06 17:20:16,769 INFO L226 Difference]: Without dead ends: 26 [2021-12-06 17:20:16,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-06 17:20:16,771 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:20:16,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:20:16,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-06 17:20:16,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-06 17:20:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-06 17:20:16,775 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2021-12-06 17:20:16,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:20:16,775 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-06 17:20:16,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:16,775 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-06 17:20:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 17:20:16,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:20:16,776 INFO L514 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:20:16,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 17:20:16,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:20:16,978 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:20:16,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:20:16,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1390008430, now seen corresponding path program 2 times [2021-12-06 17:20:16,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:20:16,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567516940] [2021-12-06 17:20:16,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:16,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:20:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:20:17,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:20:17,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567516940] [2021-12-06 17:20:17,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567516940] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:20:17,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492663280] [2021-12-06 17:20:17,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:20:17,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:20:17,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:20:17,193 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:20:17,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 17:20:17,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:20:17,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:20:17,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 17:20:17,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:20:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:20:17,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:20:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:20:17,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492663280] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:20:17,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:20:17,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-06 17:20:17,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977542769] [2021-12-06 17:20:17,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:20:17,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 17:20:17,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:20:17,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 17:20:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-06 17:20:17,433 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:17,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:20:17,463 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2021-12-06 17:20:17,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-06 17:20:17,463 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 17:20:17,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:20:17,464 INFO L225 Difference]: With dead ends: 51 [2021-12-06 17:20:17,464 INFO L226 Difference]: Without dead ends: 38 [2021-12-06 17:20:17,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-06 17:20:17,466 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:20:17,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:20:17,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-06 17:20:17,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-06 17:20:17,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-12-06 17:20:17,473 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 23 [2021-12-06 17:20:17,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:20:17,473 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-12-06 17:20:17,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:17,473 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-12-06 17:20:17,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 17:20:17,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:20:17,474 INFO L514 BasicCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:20:17,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 17:20:17,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:20:17,677 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:20:17,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:20:17,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1940857682, now seen corresponding path program 3 times [2021-12-06 17:20:17,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:20:17,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354950815] [2021-12-06 17:20:17,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:17,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:20:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 17:20:18,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:20:18,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354950815] [2021-12-06 17:20:18,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354950815] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:20:18,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239944419] [2021-12-06 17:20:18,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:20:18,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:20:18,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:20:18,023 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:20:18,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 17:20:18,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 17:20:18,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:20:18,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 17:20:18,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:20:18,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 17:20:18,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 17:20:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-06 17:20:18,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:20:18,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 17:20:18,413 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 82 treesize of output 78 [2021-12-06 17:20:18,440 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-12-06 17:20:18,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 90 [2021-12-06 17:20:18,481 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-12-06 17:20:18,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 17:20:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-06 17:20:18,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239944419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:20:18,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:20:18,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 32 [2021-12-06 17:20:18,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064332180] [2021-12-06 17:20:18,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:20:18,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-06 17:20:18,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:20:18,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-06 17:20:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=673, Unknown=0, NotChecked=0, Total=992 [2021-12-06 17:20:18,696 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:19,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:20:19,111 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2021-12-06 17:20:19,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-06 17:20:19,112 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-06 17:20:19,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:20:19,113 INFO L225 Difference]: With dead ends: 57 [2021-12-06 17:20:19,113 INFO L226 Difference]: Without dead ends: 44 [2021-12-06 17:20:19,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=953, Invalid=2239, Unknown=0, NotChecked=0, Total=3192 [2021-12-06 17:20:19,116 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:20:19,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 83 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:20:19,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-06 17:20:19,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2021-12-06 17:20:19,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:19,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2021-12-06 17:20:19,123 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 35 [2021-12-06 17:20:19,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:20:19,123 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2021-12-06 17:20:19,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:19,124 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2021-12-06 17:20:19,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-06 17:20:19,125 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:20:19,125 INFO L514 BasicCegarLoop]: trace histogram [23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:20:19,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-06 17:20:19,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:20:19,327 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:20:19,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:20:19,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1181345695, now seen corresponding path program 1 times [2021-12-06 17:20:19,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:20:19,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052247977] [2021-12-06 17:20:19,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:19,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:20:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:20:19,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:20:19,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052247977] [2021-12-06 17:20:19,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052247977] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:20:19,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596350888] [2021-12-06 17:20:19,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:19,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:20:19,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:20:19,690 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:20:19,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 17:20:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:19,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 17:20:19,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:20:19,816 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:20:19,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:20:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:20:20,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596350888] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:20:20,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:20:20,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2021-12-06 17:20:20,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592334969] [2021-12-06 17:20:20,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:20:20,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 17:20:20,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:20:20,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 17:20:20,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 17:20:20,218 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 51 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:20,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:20:20,257 INFO L93 Difference]: Finished difference Result 81 states and 113 transitions. [2021-12-06 17:20:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-06 17:20:20,258 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-06 17:20:20,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:20:20,258 INFO L225 Difference]: With dead ends: 81 [2021-12-06 17:20:20,259 INFO L226 Difference]: Without dead ends: 66 [2021-12-06 17:20:20,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-06 17:20:20,260 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 17:20:20,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 17:20:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-06 17:20:20,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-12-06 17:20:20,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:20,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-12-06 17:20:20,267 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 40 [2021-12-06 17:20:20,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:20:20,267 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-12-06 17:20:20,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 51 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:20,267 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-12-06 17:20:20,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-06 17:20:20,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:20:20,269 INFO L514 BasicCegarLoop]: trace histogram [48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:20:20,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 17:20:20,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 17:20:20,470 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:20:20,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:20:20,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1792281924, now seen corresponding path program 2 times [2021-12-06 17:20:20,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:20:20,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526823635] [2021-12-06 17:20:20,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:20,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:20:20,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:20:21,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:20:21,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526823635] [2021-12-06 17:20:21,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526823635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:20:21,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719360520] [2021-12-06 17:20:21,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 17:20:21,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:20:21,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:20:21,160 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:20:21,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 17:20:21,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 17:20:21,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:20:21,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-06 17:20:21,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:20:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:20:21,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:20:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:20:22,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719360520] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:20:22,754 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:20:22,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2021-12-06 17:20:22,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087085835] [2021-12-06 17:20:22,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:20:22,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-06 17:20:22,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:20:22,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-06 17:20:22,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 17:20:22,758 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 101 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 101 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:22,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:20:22,875 INFO L93 Difference]: Finished difference Result 131 states and 188 transitions. [2021-12-06 17:20:22,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-06 17:20:22,875 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 101 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-06 17:20:22,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:20:22,876 INFO L225 Difference]: With dead ends: 131 [2021-12-06 17:20:22,876 INFO L226 Difference]: Without dead ends: 116 [2021-12-06 17:20:22,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-06 17:20:22,880 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:20:22,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:20:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-06 17:20:22,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-12-06 17:20:22,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 115 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 120 transitions. [2021-12-06 17:20:22,891 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 120 transitions. Word has length 65 [2021-12-06 17:20:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:20:22,891 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 120 transitions. [2021-12-06 17:20:22,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1287128712871286) internal successors, (114), 101 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:22,891 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 120 transitions. [2021-12-06 17:20:22,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-06 17:20:22,894 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:20:22,894 INFO L514 BasicCegarLoop]: trace histogram [98, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:20:22,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 17:20:23,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:20:23,095 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:20:23,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:20:23,096 INFO L85 PathProgramCache]: Analyzing trace with hash -442421852, now seen corresponding path program 3 times [2021-12-06 17:20:23,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:20:23,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426471674] [2021-12-06 17:20:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:23,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:20:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:25,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4856 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-06 17:20:25,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:20:25,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426471674] [2021-12-06 17:20:25,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426471674] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:20:25,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639617379] [2021-12-06 17:20:25,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:20:25,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:20:25,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:20:25,301 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:20:25,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 17:20:25,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 17:20:25,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:20:25,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:20:25,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:20:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4856 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2021-12-06 17:20:25,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:20:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4856 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2021-12-06 17:20:25,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639617379] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:20:25,742 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:20:25,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 6, 6] total 107 [2021-12-06 17:20:25,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047444740] [2021-12-06 17:20:25,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:20:25,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-12-06 17:20:25,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:20:25,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-12-06 17:20:25,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6272, Unknown=0, NotChecked=0, Total=11342 [2021-12-06 17:20:25,747 INFO L87 Difference]: Start difference. First operand 116 states and 120 transitions. Second operand has 107 states, 107 states have (on average 1.2429906542056075) internal successors, (133), 107 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:28,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:20:28,155 INFO L93 Difference]: Finished difference Result 141 states and 151 transitions. [2021-12-06 17:20:28,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-12-06 17:20:28,155 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.2429906542056075) internal successors, (133), 107 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-12-06 17:20:28,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:20:28,156 INFO L225 Difference]: With dead ends: 141 [2021-12-06 17:20:28,156 INFO L226 Difference]: Without dead ends: 120 [2021-12-06 17:20:28,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5547 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=15267, Invalid=26963, Unknown=0, NotChecked=0, Total=42230 [2021-12-06 17:20:28,163 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:20:28,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 63 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:20:28,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-06 17:20:28,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-12-06 17:20:28,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.050420168067227) internal successors, (125), 119 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:28,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2021-12-06 17:20:28,173 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 115 [2021-12-06 17:20:28,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:20:28,173 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2021-12-06 17:20:28,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.2429906542056075) internal successors, (133), 107 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:28,173 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2021-12-06 17:20:28,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-06 17:20:28,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:20:28,175 INFO L514 BasicCegarLoop]: trace histogram [99, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:20:28,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 17:20:28,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:20:28,377 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:20:28,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:20:28,378 INFO L85 PathProgramCache]: Analyzing trace with hash -784496137, now seen corresponding path program 4 times [2021-12-06 17:20:28,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:20:28,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602830049] [2021-12-06 17:20:28,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:28,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:20:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 17:20:30,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:20:30,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602830049] [2021-12-06 17:20:30,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602830049] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:20:30,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081212572] [2021-12-06 17:20:30,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:20:30,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:20:30,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:20:30,482 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:20:30,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 17:20:30,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:20:30,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:20:30,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-06 17:20:30,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:20:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 17:20:30,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:20:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4961 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 17:20:36,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081212572] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:20:36,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:20:36,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2021-12-06 17:20:36,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459120282] [2021-12-06 17:20:36,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:20:36,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-12-06 17:20:36,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:20:36,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-12-06 17:20:36,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-12-06 17:20:36,592 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand has 203 states, 203 states have (on average 1.064039408866995) internal successors, (216), 203 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:20:36,870 INFO L93 Difference]: Finished difference Result 239 states and 349 transitions. [2021-12-06 17:20:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-12-06 17:20:36,871 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.064039408866995) internal successors, (216), 203 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2021-12-06 17:20:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 17:20:36,872 INFO L225 Difference]: With dead ends: 239 [2021-12-06 17:20:36,872 INFO L226 Difference]: Without dead ends: 221 [2021-12-06 17:20:36,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-12-06 17:20:36,875 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 17:20:36,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 17:20:36,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-06 17:20:36,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2021-12-06 17:20:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0272727272727273) internal successors, (226), 220 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:36,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 226 transitions. [2021-12-06 17:20:36,897 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 226 transitions. Word has length 119 [2021-12-06 17:20:36,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 17:20:36,897 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 226 transitions. [2021-12-06 17:20:36,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.064039408866995) internal successors, (216), 203 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:20:36,898 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 226 transitions. [2021-12-06 17:20:36,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-12-06 17:20:36,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 17:20:36,902 INFO L514 BasicCegarLoop]: trace histogram [200, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:20:36,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 17:20:37,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 17:20:37,104 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 17:20:37,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:20:37,105 INFO L85 PathProgramCache]: Analyzing trace with hash -12073614, now seen corresponding path program 5 times [2021-12-06 17:20:37,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:20:37,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656900955] [2021-12-06 17:20:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:20:37,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:20:37,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:20:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20111 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 17:20:45,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:20:45,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656900955] [2021-12-06 17:20:45,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656900955] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:20:45,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474536959] [2021-12-06 17:20:45,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 17:20:45,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:20:45,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:20:45,315 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:20:45,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fbefbe75-e80e-4c2f-a6b8-b454edce1b93/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process