./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i --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_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/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_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/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_ddbae540-4147-462e-8c00-9f92d4a57ebd/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 bb0dadf0e8f232b05f9d0197df303d37d10164a820174c4773d99bdc295fe4aa --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:31:09,520 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:31:09,523 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:31:09,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:31:09,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:31:09,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:31:09,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:31:09,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:31:09,593 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:31:09,598 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:31:09,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:31:09,602 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:31:09,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:31:09,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:31:09,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:31:09,616 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:31:09,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:31:09,619 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:31:09,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:31:09,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:31:09,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:31:09,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:31:09,638 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:31:09,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:31:09,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:31:09,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:31:09,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:31:09,652 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:31:09,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:31:09,654 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:31:09,655 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:31:09,656 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:31:09,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:31:09,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:31:09,661 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:31:09,661 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:31:09,662 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:31:09,663 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:31:09,663 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:31:09,664 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:31:09,665 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:31:09,666 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:31:09,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:31:09,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:31:09,714 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:31:09,714 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:31:09,715 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:31:09,715 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:31:09,716 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:31:09,716 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:31:09,717 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:31:09,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:31:09,718 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:31:09,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:31:09,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:31:09,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:31:09,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:31:09,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:31:09,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:31:09,720 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:31:09,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:31:09,720 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:31:09,721 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:31:09,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:31:09,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:31:09,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:31:09,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:31:09,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:31:09,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:31:09,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:31:09,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:31:09,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:31:09,723 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:31:09,724 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:31:09,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:31:09,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:31:09,724 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_ddbae540-4147-462e-8c00-9f92d4a57ebd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb0dadf0e8f232b05f9d0197df303d37d10164a820174c4773d99bdc295fe4aa [2021-11-13 17:31:10,063 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:31:10,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:31:10,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:31:10,110 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:31:10,111 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:31:10,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i [2021-11-13 17:31:10,197 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/data/609620d9a/367f7c15008e4133bd80a0b6e2aa1f83/FLAGa03b9e342 [2021-11-13 17:31:10,664 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:31:10,664 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i [2021-11-13 17:31:10,671 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/data/609620d9a/367f7c15008e4133bd80a0b6e2aa1f83/FLAGa03b9e342 [2021-11-13 17:31:11,077 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/data/609620d9a/367f7c15008e4133bd80a0b6e2aa1f83 [2021-11-13 17:31:11,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:31:11,081 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:31:11,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:31:11,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:31:11,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:31:11,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7abcd708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11, skipping insertion in model container [2021-11-13 17:31:11,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:31:11,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:31:11,282 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_ddbae540-4147-462e-8c00-9f92d4a57ebd/sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i[813,826] [2021-11-13 17:31:11,297 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:31:11,311 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:31:11,326 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_ddbae540-4147-462e-8c00-9f92d4a57ebd/sv-benchmarks/c/array-lopstr16/partial_lesser_bound.i[813,826] [2021-11-13 17:31:11,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:31:11,348 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:31:11,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11 WrapperNode [2021-11-13 17:31:11,349 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:31:11,351 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:31:11,351 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:31:11,351 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:31:11,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:31:11,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:31:11,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:31:11,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:31:11,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,427 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:31:11,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:31:11,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:31:11,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:31:11,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (1/1) ... [2021-11-13 17:31:11,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:31:11,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:31:11,494 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:31:11,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:31:11,541 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 17:31:11,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:31:11,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 17:31:11,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:31:11,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 17:31:11,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:31:11,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:31:11,777 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:31:11,778 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 17:31:11,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:31:11 BoogieIcfgContainer [2021-11-13 17:31:11,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:31:11,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:31:11,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:31:11,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:31:11,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:31:11" (1/3) ... [2021-11-13 17:31:11,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ccc1b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:31:11, skipping insertion in model container [2021-11-13 17:31:11,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:31:11" (2/3) ... [2021-11-13 17:31:11,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ccc1b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:31:11, skipping insertion in model container [2021-11-13 17:31:11,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:31:11" (3/3) ... [2021-11-13 17:31:11,791 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_lesser_bound.i [2021-11-13 17:31:11,797 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:31:11,798 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:31:11,861 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:31:11,879 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 17:31:11,880 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:31:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 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 17:31:11,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-13 17:31:11,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:11,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:11,903 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:11,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:11,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2021-11-13 17:31:11,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:11,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399499212] [2021-11-13 17:31:11,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:11,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:12,153 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 17:31:12,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:12,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399499212] [2021-11-13 17:31:12,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399499212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:31:12,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:31:12,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:31:12,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619333136] [2021-11-13 17:31:12,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:31:12,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:31:12,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:12,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:31:12,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:12,203 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 17:31:12,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:12,264 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2021-11-13 17:31:12,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:31:12,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 9 [2021-11-13 17:31:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:12,276 INFO L225 Difference]: With dead ends: 42 [2021-11-13 17:31:12,276 INFO L226 Difference]: Without dead ends: 24 [2021-11-13 17:31:12,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:31:12,283 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.47ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.32ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:12,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 21 Invalid, 20 Unknown, 0 Unchecked, 1.47ms Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 36.32ms Time] [2021-11-13 17:31:12,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-13 17:31:12,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 16. [2021-11-13 17:31:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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 17:31:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-11-13 17:31:12,320 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2021-11-13 17:31:12,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:12,320 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-11-13 17:31:12,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 17:31:12,321 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-11-13 17:31:12,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 17:31:12,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:12,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:12,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:31:12,323 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:12,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2021-11-13 17:31:12,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:12,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118424588] [2021-11-13 17:31:12,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:12,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:31:12,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:12,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118424588] [2021-11-13 17:31:12,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118424588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:31:12,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875472560] [2021-11-13 17:31:12,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:12,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:31:12,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:31:12,406 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:31:12,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:31:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:12,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:31:12,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:31:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:31:12,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:31:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 17:31:12,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875472560] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:31:12,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:31:12,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-13 17:31:12,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585457550] [2021-11-13 17:31:12,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:31:12,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:31:12,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:12,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:31:12,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:12,698 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:12,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:12,852 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-11-13 17:31:12,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:31:12,854 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-13 17:31:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:12,856 INFO L225 Difference]: With dead ends: 51 [2021-11-13 17:31:12,857 INFO L226 Difference]: Without dead ends: 40 [2021-11-13 17:31:12,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:31:12,862 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 92.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.02ms SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 131.49ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:12,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 21 Invalid, 61 Unknown, 0 Unchecked, 3.02ms Time], IncrementalHoareTripleChecker [24 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 131.49ms Time] [2021-11-13 17:31:12,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-13 17:31:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2021-11-13 17:31:12,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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 17:31:12,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-13 17:31:12,880 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2021-11-13 17:31:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:12,881 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-13 17:31:12,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:31:12,882 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-13 17:31:12,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-13 17:31:12,889 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:12,890 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:12,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:31:13,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:31:13,111 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1754797751, now seen corresponding path program 2 times [2021-11-13 17:31:13,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:13,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947674586] [2021-11-13 17:31:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:13,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 17:31:13,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:13,258 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947674586] [2021-11-13 17:31:13,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947674586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:31:13,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42303871] [2021-11-13 17:31:13,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 17:31:13,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:31:13,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:31:13,263 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:31:13,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:31:13,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 17:31:13,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:31:13,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 17:31:13,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:31:13,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 17:31:13,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:31:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 17:31:13,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42303871] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:31:13,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:31:13,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-11-13 17:31:13,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774534568] [2021-11-13 17:31:13,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:31:13,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 17:31:13,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:13,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 17:31:13,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:31:13,511 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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 17:31:13,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:13,650 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2021-11-13 17:31:13,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 17:31:13,651 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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 17:31:13,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:13,652 INFO L225 Difference]: With dead ends: 89 [2021-11-13 17:31:13,653 INFO L226 Difference]: Without dead ends: 76 [2021-11-13 17:31:13,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:31:13,655 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 81 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.30ms SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 106.58ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:13,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 33 Invalid, 103 Unknown, 0 Unchecked, 4.30ms Time], IncrementalHoareTripleChecker [40 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 106.58ms Time] [2021-11-13 17:31:13,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-13 17:31:13,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 42. [2021-11-13 17:31:13,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 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 17:31:13,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-11-13 17:31:13,666 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 21 [2021-11-13 17:31:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:13,666 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-11-13 17:31:13,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 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 17:31:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-11-13 17:31:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-13 17:31:13,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:13,668 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:13,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:31:13,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:31:13,892 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:13,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:13,892 INFO L85 PathProgramCache]: Analyzing trace with hash -707072841, now seen corresponding path program 3 times [2021-11-13 17:31:13,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:13,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755287177] [2021-11-13 17:31:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:13,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:14,210 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-13 17:31:14,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:14,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755287177] [2021-11-13 17:31:14,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755287177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:31:14,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658269621] [2021-11-13 17:31:14,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-13 17:31:14,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:31:14,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:31:14,220 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:31:14,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:31:15,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-13 17:31:15,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:31:15,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 17:31:15,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:31:15,515 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 17:31:15,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:31:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-13 17:31:15,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658269621] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:31:15,680 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:31:15,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 20 [2021-11-13 17:31:15,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672391912] [2021-11-13 17:31:15,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:31:15,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-13 17:31:15,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:15,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-13 17:31:15,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-13 17:31:15,683 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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 17:31:15,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:15,957 INFO L93 Difference]: Finished difference Result 197 states and 219 transitions. [2021-11-13 17:31:15,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-13 17:31:15,957 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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 39 [2021-11-13 17:31:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:15,964 INFO L225 Difference]: With dead ends: 197 [2021-11-13 17:31:15,964 INFO L226 Difference]: Without dead ends: 178 [2021-11-13 17:31:15,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-13 17:31:15,968 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 257 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 149.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.54ms SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 202.97ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:15,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 74 Invalid, 220 Unknown, 0 Unchecked, 5.54ms Time], IncrementalHoareTripleChecker [104 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 202.97ms Time] [2021-11-13 17:31:15,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-13 17:31:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 80. [2021-11-13 17:31:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 79 states have internal predecessors, (82), 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 17:31:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-11-13 17:31:15,996 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 39 [2021-11-13 17:31:15,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:15,996 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-11-13 17:31:15,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 20 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 17:31:15,997 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-11-13 17:31:16,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 17:31:16,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:16,005 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:16,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:31:16,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:31:16,220 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:16,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:16,220 INFO L85 PathProgramCache]: Analyzing trace with hash -775280303, now seen corresponding path program 4 times [2021-11-13 17:31:16,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:16,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332917441] [2021-11-13 17:31:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:16,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-13 17:31:16,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:16,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332917441] [2021-11-13 17:31:16,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332917441] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:31:16,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762388530] [2021-11-13 17:31:16,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-13 17:31:16,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:31:16,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:31:16,597 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:31:16,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:31:16,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-13 17:31:16,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 17:31:16,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 17:31:16,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:31:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-13 17:31:16,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:31:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-13 17:31:17,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762388530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:31:17,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:31:17,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2021-11-13 17:31:17,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589331859] [2021-11-13 17:31:17,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:31:17,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-13 17:31:17,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:31:17,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-13 17:31:17,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 17:31:17,590 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 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 17:31:18,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:31:18,253 INFO L93 Difference]: Finished difference Result 411 states and 452 transitions. [2021-11-13 17:31:18,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-13 17:31:18,254 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 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 77 [2021-11-13 17:31:18,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:31:18,256 INFO L225 Difference]: With dead ends: 411 [2021-11-13 17:31:18,256 INFO L226 Difference]: Without dead ends: 368 [2021-11-13 17:31:18,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 17:31:18,258 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 676 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 327.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.36ms SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 401.92ms IncrementalHoareTripleChecker+Time [2021-11-13 17:31:18,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [676 Valid, 154 Invalid, 496 Unknown, 0 Unchecked, 7.36ms Time], IncrementalHoareTripleChecker [260 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 401.92ms Time] [2021-11-13 17:31:18,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-13 17:31:18,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 156. [2021-11-13 17:31:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 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 17:31:18,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 158 transitions. [2021-11-13 17:31:18,280 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 158 transitions. Word has length 77 [2021-11-13 17:31:18,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:31:18,280 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 158 transitions. [2021-11-13 17:31:18,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.1025641025641026) internal successors, (121), 39 states have internal predecessors, (121), 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 17:31:18,280 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 158 transitions. [2021-11-13 17:31:18,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-13 17:31:18,283 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:31:18,283 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:31:18,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:31:18,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:31:18,499 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:31:18,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:31:18,500 INFO L85 PathProgramCache]: Analyzing trace with hash 433379653, now seen corresponding path program 5 times [2021-11-13 17:31:18,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:31:18,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125809200] [2021-11-13 17:31:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:31:18,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:31:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:31:19,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2592 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1296 trivial. 0 not checked. [2021-11-13 17:31:19,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:31:19,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125809200] [2021-11-13 17:31:19,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125809200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:31:19,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593001335] [2021-11-13 17:31:19,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-13 17:31:19,481 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:31:19,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:31:19,483 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:31:19,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ddbae540-4147-462e-8c00-9f92d4a57ebd/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process