./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array25_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array25_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y --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 d5acc4e7957d3ad66d9b011b6d1c27cdde7a453adaa0d9781357dfd70a9cc20a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:03:40,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:03:40,264 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:03:40,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:03:40,333 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:03:40,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:03:40,338 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:03:40,341 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:03:40,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:03:40,348 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:03:40,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:03:40,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:03:40,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:03:40,366 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:03:40,369 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:03:40,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:03:40,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:03:40,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:03:40,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:03:40,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:03:40,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:03:40,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:03:40,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:03:40,406 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:03:40,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:03:40,412 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:03:40,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:03:40,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:03:40,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:03:40,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:03:40,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:03:40,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:03:40,421 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:03:40,423 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:03:40,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:03:40,426 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:03:40,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:03:40,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:03:40,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:03:40,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:03:40,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:03:40,432 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:03:40,496 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:03:40,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:03:40,498 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:03:40,498 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:03:40,499 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:03:40,499 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:03:40,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:03:40,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:03:40,501 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:03:40,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:03:40,504 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:03:40,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:03:40,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:03:40,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:03:40,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:03:40,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:03:40,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:03:40,506 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:03:40,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:03:40,506 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:03:40,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:03:40,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:03:40,507 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:03:40,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:03:40,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:03:40,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:03:40,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:03:40,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:03:40,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:03:40,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:03:40,509 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:03:40,510 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:03:40,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:03:40,510 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:03:40,511 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_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d5acc4e7957d3ad66d9b011b6d1c27cdde7a453adaa0d9781357dfd70a9cc20a [2021-11-13 18:03:40,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:03:40,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:03:40,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:03:40,944 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:03:40,945 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:03:40,947 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-patterns/array25_pattern.c [2021-11-13 18:03:41,044 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/data/949fe56de/e08f6ebdb4754a4b89b338990155fd05/FLAG099bb3586 [2021-11-13 18:03:41,653 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:03:41,654 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/sv-benchmarks/c/array-patterns/array25_pattern.c [2021-11-13 18:03:41,665 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/data/949fe56de/e08f6ebdb4754a4b89b338990155fd05/FLAG099bb3586 [2021-11-13 18:03:42,029 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/data/949fe56de/e08f6ebdb4754a4b89b338990155fd05 [2021-11-13 18:03:42,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:03:42,038 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:03:42,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:03:42,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:03:42,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:03:42,049 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:03:42" (1/1) ... [2021-11-13 18:03:42,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d6b8098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:42, skipping insertion in model container [2021-11-13 18:03:42,054 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:03:42" (1/1) ... [2021-11-13 18:03:42,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:03:42,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:03:42,408 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/sv-benchmarks/c/array-patterns/array25_pattern.c[1270,1283] [2021-11-13 18:03:42,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:03:42,459 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:03:42,479 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/sv-benchmarks/c/array-patterns/array25_pattern.c[1270,1283] [2021-11-13 18:03:42,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:03:42,530 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:03:42,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:42 WrapperNode [2021-11-13 18:03:42,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:03:42,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:03:42,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:03:42,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:03:42,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:42" (1/1) ... [2021-11-13 18:03:42,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:42" (1/1) ... [2021-11-13 18:03:42,591 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:03:42,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:03:42,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:03:42,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:03:42,603 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:42" (1/1) ... [2021-11-13 18:03:42,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:42" (1/1) ... [2021-11-13 18:03:42,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:42" (1/1) ... [2021-11-13 18:03:42,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:42" (1/1) ... [2021-11-13 18:03:42,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:42" (1/1) ... [2021-11-13 18:03:42,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:42" (1/1) ... [2021-11-13 18:03:42,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:42" (1/1) ... [2021-11-13 18:03:42,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:03:42,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:03:42,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:03:42,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:03:42,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:42" (1/1) ... [2021-11-13 18:03:42,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:03:42,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:42,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:03:42,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:03:42,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:03:42,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:03:42,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:03:42,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:03:42,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:03:42,735 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:03:42,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:03:43,034 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:03:43,034 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-13 18:03:43,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:03:43 BoogieIcfgContainer [2021-11-13 18:03:43,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:03:43,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:03:43,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:03:43,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:03:43,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:03:42" (1/3) ... [2021-11-13 18:03:43,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f15e985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:03:43, skipping insertion in model container [2021-11-13 18:03:43,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:42" (2/3) ... [2021-11-13 18:03:43,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f15e985 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:03:43, skipping insertion in model container [2021-11-13 18:03:43,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:03:43" (3/3) ... [2021-11-13 18:03:43,048 INFO L111 eAbstractionObserver]: Analyzing ICFG array25_pattern.c [2021-11-13 18:03:43,054 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:03:43,055 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:03:43,115 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:03:43,123 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 [2021-11-13 18:03:43,124 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:03:43,166 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 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) [2021-11-13 18:03:43,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:03:43,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:43,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:43,174 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:43,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:43,195 INFO L85 PathProgramCache]: Analyzing trace with hash -320975489, now seen corresponding path program 1 times [2021-11-13 18:03:43,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:43,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308340824] [2021-11-13 18:03:43,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:43,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:43,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:43,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308340824] [2021-11-13 18:03:43,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308340824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:43,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:43,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:03:43,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261311644] [2021-11-13 18:03:43,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:43,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:03:43,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:43,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:03:43,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:03:43,543 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-11-13 18:03:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:43,576 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2021-11-13 18:03:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:03:43,579 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2021-11-13 18:03:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:43,590 INFO L225 Difference]: With dead ends: 43 [2021-11-13 18:03:43,590 INFO L226 Difference]: Without dead ends: 19 [2021-11-13 18:03:43,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:03:43,604 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.00ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:43,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 2.00ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:03:43,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-13 18:03:43,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-13 18:03:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2021-11-13 18:03:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-13 18:03:43,651 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-13 18:03:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:43,652 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-13 18:03:43,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-11-13 18:03:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-13 18:03:43,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:03:43,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:43,654 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:43,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:03:43,656 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:43,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:43,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1931938343, now seen corresponding path program 1 times [2021-11-13 18:03:43,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:43,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498738592] [2021-11-13 18:03:43,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:43,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:43,705 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:03:43,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [233404853] [2021-11-13 18:03:43,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:43,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:43,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:43,714 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:03:43,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:03:43,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:43,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:03:43,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:43,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:03:43,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:43,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498738592] [2021-11-13 18:03:43,971 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:03:43,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233404853] [2021-11-13 18:03:43,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233404853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:43,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:43,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:03:43,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342503949] [2021-11-13 18:03:43,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:43,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:03:43,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:43,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:03:43,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:03:43,994 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-13 18:03:44,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:44,045 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-11-13 18:03:44,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:03:44,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-11-13 18:03:44,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:44,049 INFO L225 Difference]: With dead ends: 26 [2021-11-13 18:03:44,049 INFO L226 Difference]: Without dead ends: 22 [2021-11-13 18:03:44,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:03:44,053 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.87ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.65ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.18ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:44,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 8 Unknown, 0 Unchecked, 5.65ms Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 16.18ms Time] [2021-11-13 18:03:44,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-13 18:03:44,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-13 18:03:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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) [2021-11-13 18:03:44,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-13 18:03:44,076 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2021-11-13 18:03:44,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:44,076 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-13 18:03:44,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-13 18:03:44,077 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-13 18:03:44,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:03:44,078 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:44,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:44,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:44,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-13 18:03:44,305 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:44,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:44,306 INFO L85 PathProgramCache]: Analyzing trace with hash -94215630, now seen corresponding path program 1 times [2021-11-13 18:03:44,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:44,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11962104] [2021-11-13 18:03:44,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:44,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:44,333 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:03:44,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [979955481] [2021-11-13 18:03:44,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:44,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:44,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:44,351 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:03:44,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:03:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:44,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:03:44,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:03:44,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:03:44,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:44,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11962104] [2021-11-13 18:03:44,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:03:44,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979955481] [2021-11-13 18:03:44,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979955481] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:44,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:44,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:03:44,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213392355] [2021-11-13 18:03:44,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:44,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:03:44,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:44,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:03:44,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:03:44,598 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-11-13 18:03:44,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:44,761 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2021-11-13 18:03:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:03:44,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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 15 [2021-11-13 18:03:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:44,763 INFO L225 Difference]: With dead ends: 54 [2021-11-13 18:03:44,764 INFO L226 Difference]: Without dead ends: 34 [2021-11-13 18:03:44,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:03:44,766 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.79ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 121.71ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:44,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 31 Invalid, 44 Unknown, 0 Unchecked, 1.79ms Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 121.71ms Time] [2021-11-13 18:03:44,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-13 18:03:44,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-11-13 18:03:44,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 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) [2021-11-13 18:03:44,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2021-11-13 18:03:44,774 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 15 [2021-11-13 18:03:44,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:44,774 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2021-11-13 18:03:44,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 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) [2021-11-13 18:03:44,775 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2021-11-13 18:03:44,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 18:03:44,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:44,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:44,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:44,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:44,997 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:44,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:44,998 INFO L85 PathProgramCache]: Analyzing trace with hash -169454663, now seen corresponding path program 1 times [2021-11-13 18:03:44,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:44,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851571042] [2021-11-13 18:03:44,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:44,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:45,013 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:03:45,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200404099] [2021-11-13 18:03:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:45,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:45,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:45,016 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:03:45,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:03:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:45,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:03:45,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:03:45,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:03:45,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:45,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851571042] [2021-11-13 18:03:45,231 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:03:45,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200404099] [2021-11-13 18:03:45,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200404099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:45,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:45,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:03:45,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232820776] [2021-11-13 18:03:45,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:45,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:03:45,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:45,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:03:45,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:03:45,234 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-11-13 18:03:45,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:45,357 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2021-11-13 18:03:45,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:03:45,358 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 18 [2021-11-13 18:03:45,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:45,359 INFO L225 Difference]: With dead ends: 54 [2021-11-13 18:03:45,359 INFO L226 Difference]: Without dead ends: 36 [2021-11-13 18:03:45,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:03:45,361 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.72ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 101.40ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:45,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 16 Invalid, 41 Unknown, 0 Unchecked, 1.72ms Time], IncrementalHoareTripleChecker [8 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 101.40ms Time] [2021-11-13 18:03:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-13 18:03:45,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-11-13 18:03:45,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 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) [2021-11-13 18:03:45,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-11-13 18:03:45,370 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 18 [2021-11-13 18:03:45,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:45,371 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-11-13 18:03:45,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-11-13 18:03:45,371 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-11-13 18:03:45,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 18:03:45,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:45,393 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:45,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:45,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:45,631 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:45,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:45,632 INFO L85 PathProgramCache]: Analyzing trace with hash -308201553, now seen corresponding path program 1 times [2021-11-13 18:03:45,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:45,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908317483] [2021-11-13 18:03:45,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:45,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:45,657 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:03:45,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560379395] [2021-11-13 18:03:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:45,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:45,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:45,669 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:03:45,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:03:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:45,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:03:45,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:03:45,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:03:46,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:46,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908317483] [2021-11-13 18:03:46,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:03:46,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560379395] [2021-11-13 18:03:46,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560379395] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:03:46,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:03:46,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-11-13 18:03:46,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686243849] [2021-11-13 18:03:46,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:03:46,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:03:46,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:46,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:03:46,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:03:46,097 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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) [2021-11-13 18:03:46,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:46,402 INFO L93 Difference]: Finished difference Result 65 states and 86 transitions. [2021-11-13 18:03:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:03:46,405 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 21 [2021-11-13 18:03:46,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:46,406 INFO L225 Difference]: With dead ends: 65 [2021-11-13 18:03:46,407 INFO L226 Difference]: Without dead ends: 45 [2021-11-13 18:03:46,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:03:46,409 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 112 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 114.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.92ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 148.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:46,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 22 Invalid, 94 Unknown, 0 Unchecked, 9.92ms Time], IncrementalHoareTripleChecker [35 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 148.74ms Time] [2021-11-13 18:03:46,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-13 18:03:46,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-11-13 18:03:46,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 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) [2021-11-13 18:03:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-11-13 18:03:46,428 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 21 [2021-11-13 18:03:46,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:46,429 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-11-13 18:03:46,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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) [2021-11-13 18:03:46,433 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-11-13 18:03:46,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-13 18:03:46,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:46,438 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:46,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:46,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:46,657 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:46,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:46,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1610723178, now seen corresponding path program 1 times [2021-11-13 18:03:46,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:46,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569198366] [2021-11-13 18:03:46,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:46,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:46,673 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:03:46,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758971582] [2021-11-13 18:03:46,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:46,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:46,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:46,683 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:03:46,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:03:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:46,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:03:46,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:03:46,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:03:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 18:03:47,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:47,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569198366] [2021-11-13 18:03:47,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:03:47,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758971582] [2021-11-13 18:03:47,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758971582] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:03:47,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:03:47,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-13 18:03:47,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888915503] [2021-11-13 18:03:47,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:03:47,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:03:47,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:47,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:03:47,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:03:47,091 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 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) [2021-11-13 18:03:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:47,598 INFO L93 Difference]: Finished difference Result 113 states and 152 transitions. [2021-11-13 18:03:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 18:03:47,599 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 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 27 [2021-11-13 18:03:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:47,600 INFO L225 Difference]: With dead ends: 113 [2021-11-13 18:03:47,601 INFO L226 Difference]: Without dead ends: 88 [2021-11-13 18:03:47,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:03:47,603 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 66 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 268.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.78ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 331.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:47,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 43 Invalid, 281 Unknown, 0 Unchecked, 6.78ms Time], IncrementalHoareTripleChecker [40 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 331.47ms Time] [2021-11-13 18:03:47,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-13 18:03:47,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 67. [2021-11-13 18:03:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 66 states have internal predecessors, (88), 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) [2021-11-13 18:03:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2021-11-13 18:03:47,625 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 27 [2021-11-13 18:03:47,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:47,625 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2021-11-13 18:03:47,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 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) [2021-11-13 18:03:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2021-11-13 18:03:47,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 18:03:47,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:47,627 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:47,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:03:47,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-13 18:03:47,832 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:47,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:47,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1943339208, now seen corresponding path program 1 times [2021-11-13 18:03:47,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:47,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975618802] [2021-11-13 18:03:47,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:47,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:47,847 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-13 18:03:47,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696308965] [2021-11-13 18:03:47,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:47,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:03:47,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:47,849 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:03:47,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:03:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:48,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-13 18:03:48,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:03:48,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-13 18:03:48,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-13 18:03:48,878 INFO L354 Elim1Store]: treesize reduction 120, result has 20.5 percent of original size [2021-11-13 18:03:48,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 89 [2021-11-13 18:03:48,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:03:48,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 24 [2021-11-13 18:03:49,498 INFO L354 Elim1Store]: treesize reduction 315, result has 18.4 percent of original size [2021-11-13 18:03:49,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 136 [2021-11-13 18:03:49,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:03:49,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:03:49,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:03:49,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 24 [2021-11-13 18:03:49,986 INFO L354 Elim1Store]: treesize reduction 268, result has 18.0 percent of original size [2021-11-13 18:03:49,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 115 [2021-11-13 18:03:50,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:03:50,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:03:50,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:03:50,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:03:50,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:03:50,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:03:50,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 23 [2021-11-13 18:03:51,630 INFO L354 Elim1Store]: treesize reduction 168, result has 0.6 percent of original size [2021-11-13 18:03:51,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 113 treesize of output 40 [2021-11-13 18:03:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:03:51,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:10,449 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:04:10,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 957 treesize of output 957 [2021-11-13 18:04:10,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2021-11-13 18:04:11,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 6 [2021-11-13 18:04:12,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 949 treesize of output 913 [2021-11-13 18:04:20,188 WARN L227 SmtUtils]: Spent 7.12s on a formula simplification. DAG size of input: 142 DAG size of output: 98 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-13 18:04:20,193 INFO L354 Elim1Store]: treesize reduction 260, result has 56.4 percent of original size [2021-11-13 18:04:20,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 2870987 treesize of output 2725886 [2021-11-13 18:04:29,945 WARN L227 SmtUtils]: Spent 9.74s on a formula simplification that was a NOOP. DAG size: 3016 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-13 18:04:30,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:04:30,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975618802] [2021-11-13 18:04:30,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-13 18:04:30,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696308965] [2021-11-13 18:04:30,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-13 18:04:30,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:30,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-13 18:04:30,023 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-11-13 18:04:30,024 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-11-13 18:04:30,033 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:04:30,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:30,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:04:30,265 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:30,267 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:04:30,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.11 06:04:30 BoogieIcfgContainer [2021-11-13 18:04:30,294 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-13 18:04:30,294 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-13 18:04:30,295 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-13 18:04:30,295 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-13 18:04:30,296 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:03:43" (3/4) ... [2021-11-13 18:04:30,299 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-13 18:04:30,300 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-13 18:04:30,301 INFO L158 Benchmark]: Toolchain (without parser) took 48262.11ms. Allocated memory was 102.8MB in the beginning and 281.0MB in the end (delta: 178.3MB). Free memory was 70.5MB in the beginning and 217.6MB in the end (delta: -147.1MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2021-11-13 18:04:30,301 INFO L158 Benchmark]: CDTParser took 0.41ms. Allocated memory is still 102.8MB. Free memory is still 55.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:04:30,302 INFO L158 Benchmark]: CACSL2BoogieTranslator took 490.10ms. Allocated memory is still 102.8MB. Free memory was 70.3MB in the beginning and 76.6MB in the end (delta: -6.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-13 18:04:30,302 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.18ms. Allocated memory is still 102.8MB. Free memory was 76.6MB in the beginning and 74.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:04:30,303 INFO L158 Benchmark]: Boogie Preprocessor took 31.17ms. Allocated memory is still 102.8MB. Free memory was 74.9MB in the beginning and 73.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:04:30,303 INFO L158 Benchmark]: RCFGBuilder took 413.14ms. Allocated memory is still 102.8MB. Free memory was 73.5MB in the beginning and 62.6MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-13 18:04:30,304 INFO L158 Benchmark]: TraceAbstraction took 47254.76ms. Allocated memory was 102.8MB in the beginning and 281.0MB in the end (delta: 178.3MB). Free memory was 62.0MB in the beginning and 218.7MB in the end (delta: -156.7MB). Peak memory consumption was 156.3MB. Max. memory is 16.1GB. [2021-11-13 18:04:30,304 INFO L158 Benchmark]: Witness Printer took 5.33ms. Allocated memory is still 281.0MB. Free memory was 218.7MB in the beginning and 217.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-13 18:04:30,307 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.41ms. Allocated memory is still 102.8MB. Free memory is still 55.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 490.10ms. Allocated memory is still 102.8MB. Free memory was 70.3MB in the beginning and 76.6MB in the end (delta: -6.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.18ms. Allocated memory is still 102.8MB. Free memory was 76.6MB in the beginning and 74.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.17ms. Allocated memory is still 102.8MB. Free memory was 74.9MB in the beginning and 73.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 413.14ms. Allocated memory is still 102.8MB. Free memory was 73.5MB in the beginning and 62.6MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 47254.76ms. Allocated memory was 102.8MB in the beginning and 281.0MB in the end (delta: 178.3MB). Free memory was 62.0MB in the beginning and 218.7MB in the end (delta: -156.7MB). Peak memory consumption was 156.3MB. Max. memory is 16.1GB. * Witness Printer took 5.33ms. Allocated memory is still 281.0MB. Free memory was 218.7MB in the beginning and 217.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 33]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L37] signed long long ARR_SIZE ; [L41] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L42] CALL assume_abort_if_not(ARR_SIZE > 1) [L31] COND FALSE !(!cond) [L42] RET assume_abort_if_not(ARR_SIZE > 1) [L44] int array[ARR_SIZE][ARR_SIZE] ; [L46] int row = 0, column = 0, num = -1 ; [L47] signed long sum = 0 ; [L49] row=0 [L49] COND TRUE row main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y 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 -> d5acc4e7957d3ad66d9b011b6d1c27cdde7a453adaa0d9781357dfd70a9cc20a [2021-11-13 18:04:34,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:04:34,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:04:34,106 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:04:34,108 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:04:34,109 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:04:34,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-patterns/array25_pattern.c [2021-11-13 18:04:34,204 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/data/b47d87819/7e1869e4459646c2b551677e2961a29a/FLAGfe5837828 [2021-11-13 18:04:34,963 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:04:34,964 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/sv-benchmarks/c/array-patterns/array25_pattern.c [2021-11-13 18:04:34,977 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/data/b47d87819/7e1869e4459646c2b551677e2961a29a/FLAGfe5837828 [2021-11-13 18:04:35,260 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/data/b47d87819/7e1869e4459646c2b551677e2961a29a [2021-11-13 18:04:35,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:04:35,265 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:04:35,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:04:35,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:04:35,272 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:04:35,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:04:35" (1/1) ... [2021-11-13 18:04:35,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@662cb0bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:04:35, skipping insertion in model container [2021-11-13 18:04:35,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:04:35" (1/1) ... [2021-11-13 18:04:35,305 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:04:35,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:04:35,499 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/sv-benchmarks/c/array-patterns/array25_pattern.c[1270,1283] [2021-11-13 18:04:35,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:04:35,537 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:04:35,553 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/sv-benchmarks/c/array-patterns/array25_pattern.c[1270,1283] [2021-11-13 18:04:35,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:04:35,587 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:04:35,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:04:35 WrapperNode [2021-11-13 18:04:35,588 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:04:35,589 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:04:35,590 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:04:35,590 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:04:35,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:04:35" (1/1) ... [2021-11-13 18:04:35,610 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:04:35" (1/1) ... [2021-11-13 18:04:35,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:04:35,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:04:35,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:04:35,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:04:35,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:04:35" (1/1) ... [2021-11-13 18:04:35,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:04:35" (1/1) ... [2021-11-13 18:04:35,654 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:04:35" (1/1) ... [2021-11-13 18:04:35,655 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:04:35" (1/1) ... [2021-11-13 18:04:35,665 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:04:35" (1/1) ... [2021-11-13 18:04:35,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:04:35" (1/1) ... [2021-11-13 18:04:35,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:04:35" (1/1) ... [2021-11-13 18:04:35,677 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:04:35,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:04:35,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:04:35,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:04:35,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:04:35" (1/1) ... [2021-11-13 18:04:35,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:04:35,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:04:35,739 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:04:35,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:04:35,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:04:35,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:04:35,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 18:04:35,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:04:35,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:04:35,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:04:35,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 18:04:36,391 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:04:36,393 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-13 18:04:36,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:04:36 BoogieIcfgContainer [2021-11-13 18:04:36,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:04:36,398 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:04:36,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:04:36,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:04:36,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:04:35" (1/3) ... [2021-11-13 18:04:36,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5b3f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:04:36, skipping insertion in model container [2021-11-13 18:04:36,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:04:35" (2/3) ... [2021-11-13 18:04:36,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a5b3f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:04:36, skipping insertion in model container [2021-11-13 18:04:36,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:04:36" (3/3) ... [2021-11-13 18:04:36,409 INFO L111 eAbstractionObserver]: Analyzing ICFG array25_pattern.c [2021-11-13 18:04:36,417 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:04:36,417 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:04:36,499 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:04:36,515 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 [2021-11-13 18:04:36,515 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:04:36,548 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 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) [2021-11-13 18:04:36,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:04:36,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:36,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:36,560 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:36,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:36,569 INFO L85 PathProgramCache]: Analyzing trace with hash -320975489, now seen corresponding path program 1 times [2021-11-13 18:04:36,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:36,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [368846112] [2021-11-13 18:04:36,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:36,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:36,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:36,596 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:36,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:04:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:36,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 18:04:36,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:36,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:36,893 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:36,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [368846112] [2021-11-13 18:04:36,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [368846112] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:36,895 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:36,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 18:04:36,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029229380] [2021-11-13 18:04:36,899 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:36,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:04:36,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:36,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:04:36,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:04:36,964 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-11-13 18:04:36,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:36,985 INFO L93 Difference]: Finished difference Result 43 states and 64 transitions. [2021-11-13 18:04:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:04:36,988 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2021-11-13 18:04:36,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:37,010 INFO L225 Difference]: With dead ends: 43 [2021-11-13 18:04:37,010 INFO L226 Difference]: Without dead ends: 19 [2021-11-13 18:04:37,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:04:37,019 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:37,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:04:37,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-13 18:04:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-13 18:04:37,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2021-11-13 18:04:37,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2021-11-13 18:04:37,063 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 10 [2021-11-13 18:04:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:37,064 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2021-11-13 18:04:37,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-11-13 18:04:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2021-11-13 18:04:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-13 18:04:37,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:37,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:37,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:37,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:37,281 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:37,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:37,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1931938343, now seen corresponding path program 1 times [2021-11-13 18:04:37,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:37,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127249163] [2021-11-13 18:04:37,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:37,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:37,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:37,288 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:37,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:04:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:37,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:04:37,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:37,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:04:37,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:37,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127249163] [2021-11-13 18:04:37,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127249163] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:37,621 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:37,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 18:04:37,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370073350] [2021-11-13 18:04:37,622 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:37,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:04:37,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:37,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:04:37,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:04:37,626 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-13 18:04:37,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:37,759 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-11-13 18:04:37,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:04:37,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 10 [2021-11-13 18:04:37,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:37,761 INFO L225 Difference]: With dead ends: 26 [2021-11-13 18:04:37,761 INFO L226 Difference]: Without dead ends: 22 [2021-11-13 18:04:37,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:04:37,764 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.27ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 107.92ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:37,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 73 Invalid, 11 Unknown, 0 Unchecked, 2.27ms Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 107.92ms Time] [2021-11-13 18:04:37,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-13 18:04:37,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-13 18:04:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 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) [2021-11-13 18:04:37,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-11-13 18:04:37,787 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 10 [2021-11-13 18:04:37,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:37,787 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-11-13 18:04:37,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-11-13 18:04:37,788 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-11-13 18:04:37,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-13 18:04:37,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:37,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:37,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:38,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:38,004 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:38,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:38,005 INFO L85 PathProgramCache]: Analyzing trace with hash -94215630, now seen corresponding path program 1 times [2021-11-13 18:04:38,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:38,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540811088] [2021-11-13 18:04:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:38,007 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:38,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:38,009 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:38,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:04:38,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:38,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:04:38,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:04:38,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:04:38,756 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:38,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540811088] [2021-11-13 18:04:38,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540811088] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:38,757 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:38,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 18:04:38,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841436576] [2021-11-13 18:04:38,765 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:38,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:04:38,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:38,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:04:38,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:04:38,768 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-11-13 18:04:38,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:38,996 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-11-13 18:04:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:04:38,997 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 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 15 [2021-11-13 18:04:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:38,998 INFO L225 Difference]: With dead ends: 35 [2021-11-13 18:04:38,998 INFO L226 Difference]: Without dead ends: 23 [2021-11-13 18:04:38,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:04:39,001 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 177.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.58ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 215.93ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:39,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 35 Invalid, 49 Unknown, 0 Unchecked, 1.58ms Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 17 Unchecked, 215.93ms Time] [2021-11-13 18:04:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-13 18:04:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-13 18:04:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 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) [2021-11-13 18:04:39,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-11-13 18:04:39,014 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 15 [2021-11-13 18:04:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:39,014 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-11-13 18:04:39,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 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) [2021-11-13 18:04:39,015 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-11-13 18:04:39,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-13 18:04:39,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:39,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:39,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:39,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:39,217 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:39,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:39,218 INFO L85 PathProgramCache]: Analyzing trace with hash -169454663, now seen corresponding path program 1 times [2021-11-13 18:04:39,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:39,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1998283999] [2021-11-13 18:04:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:39,219 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:39,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:39,222 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:39,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:04:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:39,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:04:39,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:04:39,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:04:39,855 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:39,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1998283999] [2021-11-13 18:04:39,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1998283999] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:39,858 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:39,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 18:04:39,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051488365] [2021-11-13 18:04:39,861 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:39,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:04:39,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:39,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:04:39,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:04:39,870 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2021-11-13 18:04:40,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:40,089 INFO L93 Difference]: Finished difference Result 42 states and 55 transitions. [2021-11-13 18:04:40,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:04:40,090 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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 18 [2021-11-13 18:04:40,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:40,092 INFO L225 Difference]: With dead ends: 42 [2021-11-13 18:04:40,092 INFO L226 Difference]: Without dead ends: 24 [2021-11-13 18:04:40,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:04:40,094 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 162.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.79ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 203.21ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:40,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 60 Unknown, 0 Unchecked, 1.79ms Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 31 Unchecked, 203.21ms Time] [2021-11-13 18:04:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-13 18:04:40,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-11-13 18:04:40,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 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) [2021-11-13 18:04:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-11-13 18:04:40,103 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 18 [2021-11-13 18:04:40,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:40,104 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-11-13 18:04:40,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 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) [2021-11-13 18:04:40,104 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2021-11-13 18:04:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 18:04:40,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:40,106 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:40,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:40,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:40,319 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:40,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:40,320 INFO L85 PathProgramCache]: Analyzing trace with hash -308201553, now seen corresponding path program 1 times [2021-11-13 18:04:40,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:40,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010620014] [2021-11-13 18:04:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:40,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:40,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:40,329 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:40,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:04:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:40,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:04:40,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:04:40,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:04:41,149 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:41,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010620014] [2021-11-13 18:04:41,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010620014] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:41,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:04:41,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-13 18:04:41,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492689835] [2021-11-13 18:04:41,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:41,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:04:41,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:41,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:04:41,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:04:41,153 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2021-11-13 18:04:41,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:41,398 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2021-11-13 18:04:41,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:04:41,399 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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 21 [2021-11-13 18:04:41,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:41,400 INFO L225 Difference]: With dead ends: 45 [2021-11-13 18:04:41,400 INFO L226 Difference]: Without dead ends: 27 [2021-11-13 18:04:41,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:04:41,402 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 195.13ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.79ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 233.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:41,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 79 Unknown, 0 Unchecked, 1.79ms Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 31 Unchecked, 233.77ms Time] [2021-11-13 18:04:41,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-13 18:04:41,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-13 18:04:41,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 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) [2021-11-13 18:04:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-13 18:04:41,414 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 21 [2021-11-13 18:04:41,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:41,414 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-13 18:04:41,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2021-11-13 18:04:41,415 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-13 18:04:41,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-13 18:04:41,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:41,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:41,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:41,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:41,635 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:41,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1090691504, now seen corresponding path program 1 times [2021-11-13 18:04:41,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:41,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [486860599] [2021-11-13 18:04:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:41,637 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:41,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:41,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:41,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:04:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:41,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:04:41,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:41,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:04:41,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:04:41,939 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:41,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [486860599] [2021-11-13 18:04:41,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [486860599] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:41,940 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:41,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 18:04:41,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084854335] [2021-11-13 18:04:41,942 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:41,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:04:41,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:41,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:04:41,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:04:41,947 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2021-11-13 18:04:42,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:42,341 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2021-11-13 18:04:42,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:04:42,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 22 [2021-11-13 18:04:42,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:42,343 INFO L225 Difference]: With dead ends: 64 [2021-11-13 18:04:42,344 INFO L226 Difference]: Without dead ends: 46 [2021-11-13 18:04:42,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:04:42,345 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 300.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.49ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 353.85ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:42,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 65 Unknown, 0 Unchecked, 1.49ms Time], IncrementalHoareTripleChecker [18 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 353.85ms Time] [2021-11-13 18:04:42,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-13 18:04:42,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2021-11-13 18:04:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 states have internal predecessors, (39), 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) [2021-11-13 18:04:42,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-11-13 18:04:42,369 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 22 [2021-11-13 18:04:42,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:42,370 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-11-13 18:04:42,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2021-11-13 18:04:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-11-13 18:04:42,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-13 18:04:42,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:42,372 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:42,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:42,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:42,589 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:42,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:42,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1958262791, now seen corresponding path program 2 times [2021-11-13 18:04:42,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:42,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [776387073] [2021-11-13 18:04:42,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:04:42,590 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:42,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:42,591 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:42,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:04:42,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:04:42,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:04:42,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:04:42,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:04:42,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:04:42,976 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:42,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [776387073] [2021-11-13 18:04:42,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [776387073] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:42,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:04:42,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-13 18:04:42,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395302079] [2021-11-13 18:04:42,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:42,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:04:42,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:42,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:04:42,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:04:42,979 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 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) [2021-11-13 18:04:43,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:43,554 INFO L93 Difference]: Finished difference Result 110 states and 145 transitions. [2021-11-13 18:04:43,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:04:43,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 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) Word has length 24 [2021-11-13 18:04:43,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:43,560 INFO L225 Difference]: With dead ends: 110 [2021-11-13 18:04:43,561 INFO L226 Difference]: Without dead ends: 88 [2021-11-13 18:04:43,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:04:43,563 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 54 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 457.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.50ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 554.80ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:43,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 113 Invalid, 115 Unknown, 0 Unchecked, 2.50ms Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 554.80ms Time] [2021-11-13 18:04:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-13 18:04:43,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 39. [2021-11-13 18:04:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 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) [2021-11-13 18:04:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2021-11-13 18:04:43,577 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 24 [2021-11-13 18:04:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:43,577 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2021-11-13 18:04:43,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 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) [2021-11-13 18:04:43,578 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2021-11-13 18:04:43,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-13 18:04:43,579 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:43,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:43,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:43,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:43,795 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:43,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:43,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1982846008, now seen corresponding path program 1 times [2021-11-13 18:04:43,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:43,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [443232374] [2021-11-13 18:04:43,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:43,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:43,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:43,798 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:43,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:04:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:43,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:04:43,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:44,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:04:44,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 18:04:45,344 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:45,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [443232374] [2021-11-13 18:04:45,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [443232374] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:45,344 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:04:45,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-13 18:04:45,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520402223] [2021-11-13 18:04:45,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:45,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:04:45,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:45,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:04:45,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:04:45,350 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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) [2021-11-13 18:04:46,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:46,187 INFO L93 Difference]: Finished difference Result 93 states and 124 transitions. [2021-11-13 18:04:46,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 18:04:46,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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 25 [2021-11-13 18:04:46,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:46,190 INFO L225 Difference]: With dead ends: 93 [2021-11-13 18:04:46,190 INFO L226 Difference]: Without dead ends: 63 [2021-11-13 18:04:46,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:04:46,192 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 19 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 402.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.57ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 465.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:46,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 26 Invalid, 141 Unknown, 0 Unchecked, 1.57ms Time], IncrementalHoareTripleChecker [10 Valid, 98 Invalid, 0 Unknown, 33 Unchecked, 465.32ms Time] [2021-11-13 18:04:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-13 18:04:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-11-13 18:04:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 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) [2021-11-13 18:04:46,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2021-11-13 18:04:46,206 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 25 [2021-11-13 18:04:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:46,207 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2021-11-13 18:04:46,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 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) [2021-11-13 18:04:46,207 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2021-11-13 18:04:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 18:04:46,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:46,209 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:46,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:46,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:46,429 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:46,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:46,430 INFO L85 PathProgramCache]: Analyzing trace with hash -951111360, now seen corresponding path program 2 times [2021-11-13 18:04:46,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:46,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599884308] [2021-11-13 18:04:46,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:04:46,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:46,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:46,432 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:46,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:04:46,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:04:46,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:04:46,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:04:46,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:04:47,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:04:47,354 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:47,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599884308] [2021-11-13 18:04:47,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599884308] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:47,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:04:47,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-13 18:04:47,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849852478] [2021-11-13 18:04:47,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:47,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:04:47,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:47,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:04:47,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:04:47,358 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-11-13 18:04:47,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:47,534 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2021-11-13 18:04:47,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:04:47,535 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 28 [2021-11-13 18:04:47,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:47,537 INFO L225 Difference]: With dead ends: 86 [2021-11-13 18:04:47,537 INFO L226 Difference]: Without dead ends: 74 [2021-11-13 18:04:47,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:04:47,538 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 148.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.75ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 165.79ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:47,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 26 Invalid, 45 Unknown, 0 Unchecked, 0.75ms Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 12 Unchecked, 165.79ms Time] [2021-11-13 18:04:47,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-13 18:04:47,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2021-11-13 18:04:47,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.271186440677966) internal successors, (75), 59 states have internal predecessors, (75), 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) [2021-11-13 18:04:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 75 transitions. [2021-11-13 18:04:47,552 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 75 transitions. Word has length 28 [2021-11-13 18:04:47,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:47,553 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 75 transitions. [2021-11-13 18:04:47,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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) [2021-11-13 18:04:47,553 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 75 transitions. [2021-11-13 18:04:47,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-13 18:04:47,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:47,555 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:47,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:47,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:47,777 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:47,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:47,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1335460331, now seen corresponding path program 3 times [2021-11-13 18:04:47,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:47,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283614608] [2021-11-13 18:04:47,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:04:47,779 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:47,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:47,780 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:47,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:04:47,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-13 18:04:47,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:04:47,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:04:47,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 18:04:48,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-13 18:04:48,661 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:48,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283614608] [2021-11-13 18:04:48,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283614608] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:48,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:04:48,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-13 18:04:48,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630064600] [2021-11-13 18:04:48,662 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:48,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:04:48,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:48,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:04:48,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:04:48,664 INFO L87 Difference]: Start difference. First operand 60 states and 75 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-11-13 18:04:48,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:48,702 INFO L93 Difference]: Finished difference Result 91 states and 116 transitions. [2021-11-13 18:04:48,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:04:48,703 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) Word has length 31 [2021-11-13 18:04:48,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:48,705 INFO L225 Difference]: With dead ends: 91 [2021-11-13 18:04:48,705 INFO L226 Difference]: Without dead ends: 87 [2021-11-13 18:04:48,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:04:48,707 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.46ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 26.46ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:48,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 30 Unknown, 0 Unchecked, 0.46ms Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 20 Unchecked, 26.46ms Time] [2021-11-13 18:04:48,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-13 18:04:48,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2021-11-13 18:04:48,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 84 states have internal predecessors, (110), 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) [2021-11-13 18:04:48,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 110 transitions. [2021-11-13 18:04:48,725 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 110 transitions. Word has length 31 [2021-11-13 18:04:48,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:48,726 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 110 transitions. [2021-11-13 18:04:48,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-11-13 18:04:48,726 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 110 transitions. [2021-11-13 18:04:48,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-13 18:04:48,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:48,728 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:48,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:48,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:48,947 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:48,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:48,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1026825090, now seen corresponding path program 4 times [2021-11-13 18:04:48,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:48,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1851701743] [2021-11-13 18:04:48,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:04:48,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:48,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:48,949 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:48,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 18:04:49,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:04:49,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:04:49,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:04:49,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 18:04:49,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:04:50,350 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:50,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1851701743] [2021-11-13 18:04:50,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1851701743] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:50,350 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:04:50,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-11-13 18:04:50,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901676459] [2021-11-13 18:04:50,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:50,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:04:50,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:50,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:04:50,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:04:50,366 INFO L87 Difference]: Start difference. First operand 85 states and 110 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2021-11-13 18:04:51,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:51,825 INFO L93 Difference]: Finished difference Result 231 states and 308 transitions. [2021-11-13 18:04:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 18:04:51,826 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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 34 [2021-11-13 18:04:51,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:51,827 INFO L225 Difference]: With dead ends: 231 [2021-11-13 18:04:51,828 INFO L226 Difference]: Without dead ends: 176 [2021-11-13 18:04:51,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-11-13 18:04:51,830 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 296.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.70ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 355.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:51,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 103 Invalid, 182 Unknown, 0 Unchecked, 1.70ms Time], IncrementalHoareTripleChecker [11 Valid, 85 Invalid, 0 Unknown, 86 Unchecked, 355.95ms Time] [2021-11-13 18:04:51,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-13 18:04:51,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 141. [2021-11-13 18:04:51,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.3214285714285714) internal successors, (185), 140 states have internal predecessors, (185), 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) [2021-11-13 18:04:51,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 185 transitions. [2021-11-13 18:04:51,857 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 185 transitions. Word has length 34 [2021-11-13 18:04:51,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:51,857 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 185 transitions. [2021-11-13 18:04:51,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 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) [2021-11-13 18:04:51,858 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 185 transitions. [2021-11-13 18:04:51,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 18:04:51,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:51,861 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:51,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:52,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:52,075 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:52,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:52,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1329887459, now seen corresponding path program 5 times [2021-11-13 18:04:52,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:52,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1622918114] [2021-11-13 18:04:52,076 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:04:52,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:52,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:52,077 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:52,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 18:04:52,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-13 18:04:52,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:04:52,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:04:52,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:52,337 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:04:52,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:04:52,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:52,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1622918114] [2021-11-13 18:04:52,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1622918114] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:52,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:04:52,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-13 18:04:52,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265032522] [2021-11-13 18:04:52,507 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:52,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:04:52,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:52,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:04:52,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:04:52,509 INFO L87 Difference]: Start difference. First operand 141 states and 185 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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) [2021-11-13 18:04:52,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:52,812 INFO L93 Difference]: Finished difference Result 210 states and 277 transitions. [2021-11-13 18:04:52,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:04:52,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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) Word has length 35 [2021-11-13 18:04:52,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:52,815 INFO L225 Difference]: With dead ends: 210 [2021-11-13 18:04:52,815 INFO L226 Difference]: Without dead ends: 145 [2021-11-13 18:04:52,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:04:52,816 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 249.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.64ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 283.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:52,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 52 Unknown, 0 Unchecked, 0.64ms Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 283.33ms Time] [2021-11-13 18:04:52,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-13 18:04:52,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 138. [2021-11-13 18:04:52,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.2773722627737227) internal successors, (175), 137 states have internal predecessors, (175), 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) [2021-11-13 18:04:52,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 175 transitions. [2021-11-13 18:04:52,853 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 175 transitions. Word has length 35 [2021-11-13 18:04:52,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:52,854 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 175 transitions. [2021-11-13 18:04:52,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 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) [2021-11-13 18:04:52,854 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 175 transitions. [2021-11-13 18:04:52,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 18:04:52,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:52,864 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:52,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-13 18:04:53,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:53,081 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:53,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:53,081 INFO L85 PathProgramCache]: Analyzing trace with hash -863664749, now seen corresponding path program 1 times [2021-11-13 18:04:53,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:53,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431253790] [2021-11-13 18:04:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:53,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:53,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:53,084 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:53,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 18:04:53,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:53,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:04:53,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:04:53,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:54,451 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:04:54,451 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:54,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431253790] [2021-11-13 18:04:54,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431253790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:54,452 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:04:54,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-11-13 18:04:54,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669237730] [2021-11-13 18:04:54,452 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:54,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:04:54,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:54,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:04:54,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:04:54,455 INFO L87 Difference]: Start difference. First operand 138 states and 175 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 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) [2021-11-13 18:04:55,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:55,515 INFO L93 Difference]: Finished difference Result 292 states and 384 transitions. [2021-11-13 18:04:55,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 18:04:55,516 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 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 36 [2021-11-13 18:04:55,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:55,519 INFO L225 Difference]: With dead ends: 292 [2021-11-13 18:04:55,519 INFO L226 Difference]: Without dead ends: 279 [2021-11-13 18:04:55,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:04:55,521 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 85 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 485.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.88ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 545.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:55,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 72 Invalid, 202 Unknown, 0 Unchecked, 1.88ms Time], IncrementalHoareTripleChecker [15 Valid, 95 Invalid, 0 Unknown, 92 Unchecked, 545.19ms Time] [2021-11-13 18:04:55,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-11-13 18:04:55,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 228. [2021-11-13 18:04:55,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.3171806167400881) internal successors, (299), 227 states have internal predecessors, (299), 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) [2021-11-13 18:04:55,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 299 transitions. [2021-11-13 18:04:55,566 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 299 transitions. Word has length 36 [2021-11-13 18:04:55,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:55,569 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 299 transitions. [2021-11-13 18:04:55,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 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) [2021-11-13 18:04:55,570 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 299 transitions. [2021-11-13 18:04:55,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-13 18:04:55,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:55,575 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:55,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:55,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:55,791 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:55,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:55,792 INFO L85 PathProgramCache]: Analyzing trace with hash -892878219, now seen corresponding path program 2 times [2021-11-13 18:04:55,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:55,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78740066] [2021-11-13 18:04:55,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:04:55,793 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:55,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:55,794 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:55,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 18:04:55,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:04:55,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:04:55,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:04:55,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 18:04:56,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 18:04:56,771 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:56,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78740066] [2021-11-13 18:04:56,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78740066] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:56,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:04:56,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-13 18:04:56,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994541759] [2021-11-13 18:04:56,772 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:56,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:04:56,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:56,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:04:56,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:04:56,774 INFO L87 Difference]: Start difference. First operand 228 states and 299 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2021-11-13 18:04:56,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:56,810 INFO L93 Difference]: Finished difference Result 240 states and 313 transitions. [2021-11-13 18:04:56,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:04:56,811 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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 38 [2021-11-13 18:04:56,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:56,813 INFO L225 Difference]: With dead ends: 240 [2021-11-13 18:04:56,814 INFO L226 Difference]: Without dead ends: 236 [2021-11-13 18:04:56,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:04:56,815 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 6 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.31ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.11ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:56,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.31ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 27 Unchecked, 0.11ms Time] [2021-11-13 18:04:56,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-13 18:04:56,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 167. [2021-11-13 18:04:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.2891566265060241) internal successors, (214), 166 states have internal predecessors, (214), 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) [2021-11-13 18:04:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 214 transitions. [2021-11-13 18:04:56,841 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 214 transitions. Word has length 38 [2021-11-13 18:04:56,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:56,842 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 214 transitions. [2021-11-13 18:04:56,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 10 states have internal predecessors, (44), 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) [2021-11-13 18:04:56,842 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 214 transitions. [2021-11-13 18:04:56,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-13 18:04:56,843 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:56,844 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:56,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:57,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:57,059 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:57,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:57,060 INFO L85 PathProgramCache]: Analyzing trace with hash 54280905, now seen corresponding path program 6 times [2021-11-13 18:04:57,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:57,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730625185] [2021-11-13 18:04:57,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:04:57,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:57,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:57,062 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:57,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 18:04:57,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-13 18:04:57,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:04:57,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:04:57,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:04:57,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:04:58,731 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:58,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730625185] [2021-11-13 18:04:58,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1730625185] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:58,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:04:58,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-11-13 18:04:58,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667452176] [2021-11-13 18:04:58,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:58,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:04:58,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:58,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:04:58,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:04:58,733 INFO L87 Difference]: Start difference. First operand 167 states and 214 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 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) [2021-11-13 18:05:00,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:00,455 INFO L93 Difference]: Finished difference Result 215 states and 279 transitions. [2021-11-13 18:05:00,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-13 18:05:00,456 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 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 38 [2021-11-13 18:05:00,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:00,458 INFO L225 Difference]: With dead ends: 215 [2021-11-13 18:05:00,458 INFO L226 Difference]: Without dead ends: 197 [2021-11-13 18:05:00,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2021-11-13 18:05:00,460 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 731.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.70ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 800.94ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:00,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 47 Invalid, 194 Unknown, 0 Unchecked, 1.70ms Time], IncrementalHoareTripleChecker [14 Valid, 98 Invalid, 0 Unknown, 82 Unchecked, 800.94ms Time] [2021-11-13 18:05:00,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-13 18:05:00,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 181. [2021-11-13 18:05:00,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.3) internal successors, (234), 180 states have internal predecessors, (234), 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) [2021-11-13 18:05:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 234 transitions. [2021-11-13 18:05:00,488 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 234 transitions. Word has length 38 [2021-11-13 18:05:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:00,488 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 234 transitions. [2021-11-13 18:05:00,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 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) [2021-11-13 18:05:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 234 transitions. [2021-11-13 18:05:00,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-13 18:05:00,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:00,490 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:00,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:00,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:00,705 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:00,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:00,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1018497115, now seen corresponding path program 7 times [2021-11-13 18:05:00,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:00,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6926858] [2021-11-13 18:05:00,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-13 18:05:00,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:00,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:00,709 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:00,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 18:05:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:00,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:05:00,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 18:05:01,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 18:05:02,269 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:02,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6926858] [2021-11-13 18:05:02,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6926858] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:05:02,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:05:02,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-11-13 18:05:02,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990298214] [2021-11-13 18:05:02,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:05:02,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-13 18:05:02,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:02,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-13 18:05:02,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:05:02,273 INFO L87 Difference]: Start difference. First operand 181 states and 234 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 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) [2021-11-13 18:05:04,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:04,380 INFO L93 Difference]: Finished difference Result 442 states and 587 transitions. [2021-11-13 18:05:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 18:05:04,381 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 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 38 [2021-11-13 18:05:04,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:04,384 INFO L225 Difference]: With dead ends: 442 [2021-11-13 18:05:04,384 INFO L226 Difference]: Without dead ends: 364 [2021-11-13 18:05:04,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-11-13 18:05:04,386 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 42 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 309.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.86ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 361.34ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:04,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 120 Invalid, 227 Unknown, 0 Unchecked, 1.86ms Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 120 Unchecked, 361.34ms Time] [2021-11-13 18:05:04,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-11-13 18:05:04,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 318. [2021-11-13 18:05:04,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.3154574132492114) internal successors, (417), 317 states have internal predecessors, (417), 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) [2021-11-13 18:05:04,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 417 transitions. [2021-11-13 18:05:04,431 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 417 transitions. Word has length 38 [2021-11-13 18:05:04,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:04,432 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 417 transitions. [2021-11-13 18:05:04,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 19 states have internal predecessors, (57), 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) [2021-11-13 18:05:04,433 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 417 transitions. [2021-11-13 18:05:04,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 18:05:04,434 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:04,435 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:04,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:04,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:04,651 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:04,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:04,651 INFO L85 PathProgramCache]: Analyzing trace with hash -984604620, now seen corresponding path program 8 times [2021-11-13 18:05:04,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:04,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994240128] [2021-11-13 18:05:04,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:05:04,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:04,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:04,654 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:04,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 18:05:04,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:05:04,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:05:04,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:05:04,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:05,235 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:05:05,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 18:05:05,889 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:05,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994240128] [2021-11-13 18:05:05,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994240128] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:05:05,889 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:05:05,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 14 [2021-11-13 18:05:05,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723867376] [2021-11-13 18:05:05,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:05:05,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:05:05,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:05,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:05:05,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:05:05,892 INFO L87 Difference]: Start difference. First operand 318 states and 417 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 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) [2021-11-13 18:05:06,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:06,625 INFO L93 Difference]: Finished difference Result 656 states and 887 transitions. [2021-11-13 18:05:06,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:05:06,627 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 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 41 [2021-11-13 18:05:06,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:06,631 INFO L225 Difference]: With dead ends: 656 [2021-11-13 18:05:06,632 INFO L226 Difference]: Without dead ends: 507 [2021-11-13 18:05:06,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:05:06,635 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 179.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.14ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 203.61ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:06,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 66 Invalid, 103 Unknown, 0 Unchecked, 1.14ms Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 60 Unchecked, 203.61ms Time] [2021-11-13 18:05:06,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-11-13 18:05:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 496. [2021-11-13 18:05:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 1.3373737373737373) internal successors, (662), 495 states have internal predecessors, (662), 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) [2021-11-13 18:05:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 662 transitions. [2021-11-13 18:05:06,703 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 662 transitions. Word has length 41 [2021-11-13 18:05:06,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:06,705 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 662 transitions. [2021-11-13 18:05:06,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 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) [2021-11-13 18:05:06,706 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 662 transitions. [2021-11-13 18:05:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 18:05:06,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:06,708 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:06,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:06,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:06,925 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:06,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:06,925 INFO L85 PathProgramCache]: Analyzing trace with hash 421760628, now seen corresponding path program 3 times [2021-11-13 18:05:06,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:06,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315635103] [2021-11-13 18:05:06,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:05:06,926 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:06,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:06,928 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:06,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 18:05:07,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:05:07,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:05:07,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-13 18:05:07,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 18:05:07,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 18:05:08,166 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:08,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315635103] [2021-11-13 18:05:08,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315635103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:05:08,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:05:08,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-11-13 18:05:08,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276772968] [2021-11-13 18:05:08,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:05:08,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:05:08,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:08,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:05:08,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:05:08,169 INFO L87 Difference]: Start difference. First operand 496 states and 662 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 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) [2021-11-13 18:05:08,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:08,324 INFO L93 Difference]: Finished difference Result 536 states and 713 transitions. [2021-11-13 18:05:08,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:05:08,325 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 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 41 [2021-11-13 18:05:08,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:08,329 INFO L225 Difference]: With dead ends: 536 [2021-11-13 18:05:08,330 INFO L226 Difference]: Without dead ends: 523 [2021-11-13 18:05:08,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:05:08,331 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.61ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 91.31ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:08,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 60 Unknown, 0 Unchecked, 0.61ms Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 34 Unchecked, 91.31ms Time] [2021-11-13 18:05:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-13 18:05:08,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 503. [2021-11-13 18:05:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 1.3346613545816732) internal successors, (670), 502 states have internal predecessors, (670), 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) [2021-11-13 18:05:08,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 670 transitions. [2021-11-13 18:05:08,400 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 670 transitions. Word has length 41 [2021-11-13 18:05:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:08,401 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 670 transitions. [2021-11-13 18:05:08,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 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) [2021-11-13 18:05:08,401 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 670 transitions. [2021-11-13 18:05:08,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 18:05:08,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:08,403 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:08,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:08,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:08,621 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:08,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:08,622 INFO L85 PathProgramCache]: Analyzing trace with hash -550379465, now seen corresponding path program 9 times [2021-11-13 18:05:08,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:08,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119442852] [2021-11-13 18:05:08,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 18:05:08,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:08,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:08,624 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:08,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 18:05:08,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-13 18:05:08,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:05:08,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:05:08,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:09,361 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:05:09,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:09,901 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-13 18:05:09,901 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:09,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119442852] [2021-11-13 18:05:09,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119442852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:05:09,901 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:05:09,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-11-13 18:05:09,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751390587] [2021-11-13 18:05:09,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:05:09,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:05:09,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:09,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:05:09,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:05:09,904 INFO L87 Difference]: Start difference. First operand 503 states and 670 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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) [2021-11-13 18:05:10,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:10,448 INFO L93 Difference]: Finished difference Result 548 states and 725 transitions. [2021-11-13 18:05:10,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:05:10,450 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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 41 [2021-11-13 18:05:10,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:10,454 INFO L225 Difference]: With dead ends: 548 [2021-11-13 18:05:10,454 INFO L226 Difference]: Without dead ends: 533 [2021-11-13 18:05:10,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:05:10,456 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 211.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.04ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 241.21ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:10,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 39 Invalid, 113 Unknown, 0 Unchecked, 1.04ms Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 47 Unchecked, 241.21ms Time] [2021-11-13 18:05:10,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-11-13 18:05:10,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 518. [2021-11-13 18:05:10,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 1.3307543520309477) internal successors, (688), 517 states have internal predecessors, (688), 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) [2021-11-13 18:05:10,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 688 transitions. [2021-11-13 18:05:10,533 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 688 transitions. Word has length 41 [2021-11-13 18:05:10,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:10,534 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 688 transitions. [2021-11-13 18:05:10,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 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) [2021-11-13 18:05:10,534 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 688 transitions. [2021-11-13 18:05:10,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 18:05:10,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:10,536 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:10,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:10,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:10,751 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:10,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:10,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1590540904, now seen corresponding path program 4 times [2021-11-13 18:05:10,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:10,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1353728425] [2021-11-13 18:05:10,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 18:05:10,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:10,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:10,754 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:10,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 18:05:10,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 18:05:10,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:05:10,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:05:10,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 18:05:11,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:11,183 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-13 18:05:11,183 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:11,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1353728425] [2021-11-13 18:05:11,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1353728425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:05:11,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:05:11,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-13 18:05:11,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524982727] [2021-11-13 18:05:11,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:05:11,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:05:11,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:11,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:05:11,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:05:11,186 INFO L87 Difference]: Start difference. First operand 518 states and 688 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2021-11-13 18:05:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:11,620 INFO L93 Difference]: Finished difference Result 1129 states and 1534 transitions. [2021-11-13 18:05:11,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:05:11,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 42 [2021-11-13 18:05:11,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:11,626 INFO L225 Difference]: With dead ends: 1129 [2021-11-13 18:05:11,626 INFO L226 Difference]: Without dead ends: 696 [2021-11-13 18:05:11,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:05:11,628 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 284.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.14ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 348.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:11,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 58 Invalid, 77 Unknown, 0 Unchecked, 1.14ms Time], IncrementalHoareTripleChecker [12 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 348.60ms Time] [2021-11-13 18:05:11,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-11-13 18:05:11,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 572. [2021-11-13 18:05:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 1.3134851138353765) internal successors, (750), 571 states have internal predecessors, (750), 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) [2021-11-13 18:05:11,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 750 transitions. [2021-11-13 18:05:11,718 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 750 transitions. Word has length 42 [2021-11-13 18:05:11,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:11,719 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 750 transitions. [2021-11-13 18:05:11,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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) [2021-11-13 18:05:11,719 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 750 transitions. [2021-11-13 18:05:11,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-13 18:05:11,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:11,722 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:11,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:11,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:11,937 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:11,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:11,938 INFO L85 PathProgramCache]: Analyzing trace with hash 631089746, now seen corresponding path program 5 times [2021-11-13 18:05:11,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:11,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179107890] [2021-11-13 18:05:11,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 18:05:11,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:11,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:11,940 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:11,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-13 18:05:12,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-13 18:05:12,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:05:12,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:05:12,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-13 18:05:12,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-13 18:05:13,216 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:13,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179107890] [2021-11-13 18:05:13,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179107890] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:05:13,217 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:05:13,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2021-11-13 18:05:13,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907952744] [2021-11-13 18:05:13,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:05:13,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 18:05:13,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:13,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 18:05:13,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:05:13,220 INFO L87 Difference]: Start difference. First operand 572 states and 750 transitions. Second operand has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 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) [2021-11-13 18:05:15,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:15,948 INFO L93 Difference]: Finished difference Result 1306 states and 1732 transitions. [2021-11-13 18:05:15,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-13 18:05:15,950 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 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 42 [2021-11-13 18:05:15,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:15,956 INFO L225 Difference]: With dead ends: 1306 [2021-11-13 18:05:15,956 INFO L226 Difference]: Without dead ends: 877 [2021-11-13 18:05:15,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=259, Invalid=931, Unknown=0, NotChecked=0, Total=1190 [2021-11-13 18:05:15,960 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 210 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1712.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.59ms SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1976.66ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:15,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 100 Invalid, 842 Unknown, 0 Unchecked, 7.59ms Time], IncrementalHoareTripleChecker [98 Valid, 744 Invalid, 0 Unknown, 0 Unchecked, 1976.66ms Time] [2021-11-13 18:05:15,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-11-13 18:05:16,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 195. [2021-11-13 18:05:16,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.1958762886597938) internal successors, (232), 194 states have internal predecessors, (232), 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) [2021-11-13 18:05:16,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 232 transitions. [2021-11-13 18:05:16,012 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 232 transitions. Word has length 42 [2021-11-13 18:05:16,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:16,012 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 232 transitions. [2021-11-13 18:05:16,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.4) internal successors, (68), 20 states have internal predecessors, (68), 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) [2021-11-13 18:05:16,013 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 232 transitions. [2021-11-13 18:05:16,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-13 18:05:16,014 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:16,014 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:16,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:16,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:16,228 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:16,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:16,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1943339208, now seen corresponding path program 6 times [2021-11-13 18:05:16,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:16,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121633257] [2021-11-13 18:05:16,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-13 18:05:16,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:16,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:16,231 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:16,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40d5ef6d-2786-4aaa-8457-5763cb7aee3c/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-13 18:05:16,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-13 18:05:16,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:05:16,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-13 18:05:16,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:17,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-13 18:05:17,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:05:17,779 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 36 treesize of output 35 [2021-11-13 18:05:18,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:05:18,808 INFO L354 Elim1Store]: treesize reduction 65, result has 31.6 percent of original size [2021-11-13 18:05:18,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 55 [2021-11-13 18:05:20,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:05:20,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:05:20,114 INFO L354 Elim1Store]: treesize reduction 91, result has 23.5 percent of original size [2021-11-13 18:05:20,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 66 [2021-11-13 18:05:23,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:05:23,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:05:23,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:05:23,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:05:23,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:05:23,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:05:23,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 18:05:23,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-13 18:05:23,474 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-13 18:05:23,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 24 [2021-11-13 18:05:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:05:24,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:10,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 508 treesize of output 492 [2021-11-13 18:06:13,036 INFO L354 Elim1Store]: treesize reduction 41, result has 53.4 percent of original size [2021-11-13 18:06:13,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 849365083 treesize of output 827345033