./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/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_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/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 64bit --witnessprinter.graph.data.programhash 8bd4d18c7774801c1dd2fcc01cd37afd9da2c99096cf08f4bd160d17156b286b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:05:22,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:05:22,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:05:22,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:05:22,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:05:22,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:05:22,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:05:22,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:05:22,508 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:05:22,510 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:05:22,511 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:05:22,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:05:22,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:05:22,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:05:22,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:05:22,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:05:22,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:05:22,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:05:22,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:05:22,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:05:22,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:05:22,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:05:22,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:05:22,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:05:22,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:05:22,564 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:05:22,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:05:22,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:05:22,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:05:22,568 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:05:22,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:05:22,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:05:22,571 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:05:22,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:05:22,574 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:05:22,574 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:05:22,575 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:05:22,575 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:05:22,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:05:22,577 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:05:22,578 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:05:22,579 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-13 18:05:22,614 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:05:22,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:05:22,619 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:05:22,620 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:05:22,621 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:05:22,621 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:05:22,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:05:22,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:05:22,623 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:05:22,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:05:22,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:05:22,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:05:22,627 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:05:22,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:05:22,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:05:22,628 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:05:22,628 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:05:22,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:05:22,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:05:22,629 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:05:22,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:05:22,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:05:22,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:05:22,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:05:22,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:05:22,631 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:05:22,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:05:22,632 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:05:22,632 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:05:22,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:05:22,635 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:05:22,636 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_552290e3-e871-475a-9cda-67b6e59acc0b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd4d18c7774801c1dd2fcc01cd37afd9da2c99096cf08f4bd160d17156b286b [2021-11-13 18:05:22,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:05:22,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:05:22,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:05:22,975 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:05:22,976 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:05:22,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-13 18:05:23,082 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/data/5be23dee1/28924e38f15e47fe943a3ca43a8eb959/FLAG9ca29429d [2021-11-13 18:05:24,010 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:05:24,012 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-13 18:05:24,071 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/data/5be23dee1/28924e38f15e47fe943a3ca43a8eb959/FLAG9ca29429d [2021-11-13 18:05:24,563 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/data/5be23dee1/28924e38f15e47fe943a3ca43a8eb959 [2021-11-13 18:05:24,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:05:24,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:05:24,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:05:24,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:05:24,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:05:24,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:05:24" (1/1) ... [2021-11-13 18:05:24,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22fb002a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:24, skipping insertion in model container [2021-11-13 18:05:24,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:05:24" (1/1) ... [2021-11-13 18:05:24,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:05:24,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:05:25,618 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_552290e3-e871-475a-9cda-67b6e59acc0b/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113815,113828] [2021-11-13 18:05:25,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:05:25,745 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:05:25,991 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_552290e3-e871-475a-9cda-67b6e59acc0b/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113815,113828] [2021-11-13 18:05:26,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:05:26,083 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:05:26,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:26 WrapperNode [2021-11-13 18:05:26,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:05:26,088 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:05:26,088 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:05:26,088 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:05:26,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:26" (1/1) ... [2021-11-13 18:05:26,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:26" (1/1) ... [2021-11-13 18:05:26,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:05:26,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:05:26,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:05:26,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:05:26,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:26" (1/1) ... [2021-11-13 18:05:26,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:26" (1/1) ... [2021-11-13 18:05:26,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:26" (1/1) ... [2021-11-13 18:05:26,287 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:26" (1/1) ... [2021-11-13 18:05:26,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:26" (1/1) ... [2021-11-13 18:05:26,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:26" (1/1) ... [2021-11-13 18:05:26,356 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:26" (1/1) ... [2021-11-13 18:05:26,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:05:26,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:05:26,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:05:26,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:05:26,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:26" (1/1) ... [2021-11-13 18:05:26,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:05:26,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:05:26,473 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:05:26,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:05:26,525 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:05:26,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:05:26,526 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:05:26,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-13 18:05:26,527 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-13 18:05:26,527 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:05:26,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:05:26,527 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 18:05:26,528 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 18:05:26,528 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2021-11-13 18:05:26,528 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2021-11-13 18:05:26,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:05:26,528 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:05:26,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:05:26,529 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 18:05:26,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 18:05:26,529 INFO L130 BoogieDeclarations]: Found specification of procedure usb_acecad_disconnect [2021-11-13 18:05:26,529 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_acecad_disconnect [2021-11-13 18:05:26,530 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-13 18:05:26,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-13 18:05:26,530 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:05:26,531 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:05:26,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:05:26,531 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-13 18:05:26,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-13 18:05:26,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:05:26,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:05:26,532 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2021-11-13 18:05:26,532 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2021-11-13 18:05:26,532 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-13 18:05:26,532 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-13 18:05:26,532 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_7 [2021-11-13 18:05:26,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_7 [2021-11-13 18:05:26,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:05:26,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:05:26,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:05:26,533 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-13 18:05:26,534 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-13 18:05:26,534 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 18:05:26,534 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 18:05:26,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:05:26,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:05:26,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:05:27,166 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:05:28,173 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:05:28,174 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:05:28,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:05:28 BoogieIcfgContainer [2021-11-13 18:05:28,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:05:28,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:05:28,180 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:05:28,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:05:28,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:05:24" (1/3) ... [2021-11-13 18:05:28,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df6c7db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:05:28, skipping insertion in model container [2021-11-13 18:05:28,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:26" (2/3) ... [2021-11-13 18:05:28,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6df6c7db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:05:28, skipping insertion in model container [2021-11-13 18:05:28,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:05:28" (3/3) ... [2021-11-13 18:05:28,189 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-13 18:05:28,200 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:05:28,201 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:05:28,289 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:05:28,298 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 18:05:28,298 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:05:28,332 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 173 states have (on average 1.3121387283236994) internal successors, (227), 184 states have internal predecessors, (227), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-13 18:05:28,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 18:05:28,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:28,342 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:28,342 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:28,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:28,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1664570800, now seen corresponding path program 1 times [2021-11-13 18:05:28,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:28,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629819595] [2021-11-13 18:05:28,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:28,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:28,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:28,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:29,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:29,028 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 18:05:29,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:29,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629819595] [2021-11-13 18:05:29,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629819595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:29,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:29,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:05:29,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681247380] [2021-11-13 18:05:29,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:29,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:05:29,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:29,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:05:29,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:05:29,105 INFO L87 Difference]: Start difference. First operand has 233 states, 173 states have (on average 1.3121387283236994) internal successors, (227), 184 states have internal predecessors, (227), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:05:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:29,651 INFO L93 Difference]: Finished difference Result 468 states and 636 transitions. [2021-11-13 18:05:29,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:05:29,655 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-11-13 18:05:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:29,671 INFO L225 Difference]: With dead ends: 468 [2021-11-13 18:05:29,672 INFO L226 Difference]: Without dead ends: 229 [2021-11-13 18:05:29,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:05:29,684 INFO L933 BasicCegarLoop]: 293 mSDtfsCounter, 90 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 329.38ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.85ms SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 406.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:29,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 457 Invalid, 161 Unknown, 0 Unchecked, 16.85ms Time], IncrementalHoareTripleChecker [93 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 406.39ms Time] [2021-11-13 18:05:29,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-13 18:05:29,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 222. [2021-11-13 18:05:29,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 168 states have (on average 1.2797619047619047) internal successors, (215), 173 states have internal predecessors, (215), 39 states have call successors, (39), 15 states have call predecessors, (39), 14 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-13 18:05:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 289 transitions. [2021-11-13 18:05:29,825 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 289 transitions. Word has length 32 [2021-11-13 18:05:29,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:29,826 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 289 transitions. [2021-11-13 18:05:29,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:05:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 289 transitions. [2021-11-13 18:05:29,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 18:05:29,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:29,830 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:29,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:05:29,831 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:29,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:29,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1241868974, now seen corresponding path program 1 times [2021-11-13 18:05:29,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:29,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170955345] [2021-11-13 18:05:29,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:29,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:30,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:30,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:30,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:30,111 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 18:05:30,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:30,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170955345] [2021-11-13 18:05:30,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170955345] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:30,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:30,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:05:30,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594441931] [2021-11-13 18:05:30,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:30,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:05:30,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:30,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:05:30,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:05:30,118 INFO L87 Difference]: Start difference. First operand 222 states and 289 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:05:31,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:31,090 INFO L93 Difference]: Finished difference Result 646 states and 850 transitions. [2021-11-13 18:05:31,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:05:31,091 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-11-13 18:05:31,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:31,105 INFO L225 Difference]: With dead ends: 646 [2021-11-13 18:05:31,105 INFO L226 Difference]: Without dead ends: 429 [2021-11-13 18:05:31,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:05:31,118 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 312 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 675.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 24.18ms SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 801.04ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:31,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 847 Invalid, 360 Unknown, 0 Unchecked, 24.18ms Time], IncrementalHoareTripleChecker [103 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 801.04ms Time] [2021-11-13 18:05:31,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-11-13 18:05:31,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 415. [2021-11-13 18:05:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 314 states have (on average 1.2738853503184713) internal successors, (400), 321 states have internal predecessors, (400), 72 states have call successors, (72), 29 states have call predecessors, (72), 28 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2021-11-13 18:05:31,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 540 transitions. [2021-11-13 18:05:31,254 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 540 transitions. Word has length 32 [2021-11-13 18:05:31,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:31,256 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 540 transitions. [2021-11-13 18:05:31,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:05:31,256 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 540 transitions. [2021-11-13 18:05:31,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 18:05:31,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:31,269 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:31,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:05:31,270 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:31,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:31,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1658921169, now seen corresponding path program 1 times [2021-11-13 18:05:31,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:31,271 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147048871] [2021-11-13 18:05:31,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:31,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:31,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:31,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:31,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:31,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:05:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:31,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:31,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:31,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:05:31,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:31,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147048871] [2021-11-13 18:05:31,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147048871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:31,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:31,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:05:31,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469639217] [2021-11-13 18:05:31,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:31,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:05:31,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:31,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:05:31,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:05:31,604 INFO L87 Difference]: Start difference. First operand 415 states and 540 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:05:32,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:32,810 INFO L93 Difference]: Finished difference Result 980 states and 1316 transitions. [2021-11-13 18:05:32,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:05:32,811 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2021-11-13 18:05:32,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:32,818 INFO L225 Difference]: With dead ends: 980 [2021-11-13 18:05:32,818 INFO L226 Difference]: Without dead ends: 580 [2021-11-13 18:05:32,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:05:32,821 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 608 mSDsluCounter, 1111 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 900.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 22.95ms SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1044.64ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:32,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [640 Valid, 1558 Invalid, 523 Unknown, 0 Unchecked, 22.95ms Time], IncrementalHoareTripleChecker [167 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 1044.64ms Time] [2021-11-13 18:05:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-11-13 18:05:32,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 418. [2021-11-13 18:05:32,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 317 states have (on average 1.2681388012618298) internal successors, (402), 324 states have internal predecessors, (402), 72 states have call successors, (72), 29 states have call predecessors, (72), 28 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2021-11-13 18:05:32,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 542 transitions. [2021-11-13 18:05:32,876 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 542 transitions. Word has length 55 [2021-11-13 18:05:32,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:32,877 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 542 transitions. [2021-11-13 18:05:32,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:05:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 542 transitions. [2021-11-13 18:05:32,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 18:05:32,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:32,886 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:32,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:05:32,886 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:32,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:32,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1898729455, now seen corresponding path program 1 times [2021-11-13 18:05:32,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:32,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011275823] [2021-11-13 18:05:32,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:32,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:33,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:33,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:33,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:33,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:05:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:33,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:33,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:33,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:05:33,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:33,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011275823] [2021-11-13 18:05:33,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011275823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:33,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:33,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:05:33,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567143902] [2021-11-13 18:05:33,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:33,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:05:33,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:33,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:05:33,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:05:33,131 INFO L87 Difference]: Start difference. First operand 418 states and 542 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:05:33,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:33,971 INFO L93 Difference]: Finished difference Result 1245 states and 1635 transitions. [2021-11-13 18:05:33,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:05:33,984 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2021-11-13 18:05:33,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:33,994 INFO L225 Difference]: With dead ends: 1245 [2021-11-13 18:05:33,997 INFO L226 Difference]: Without dead ends: 842 [2021-11-13 18:05:33,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:05:34,006 INFO L933 BasicCegarLoop]: 377 mSDtfsCounter, 312 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 610.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.96ms SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 723.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:34,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 993 Invalid, 357 Unknown, 0 Unchecked, 12.96ms Time], IncrementalHoareTripleChecker [95 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 723.86ms Time] [2021-11-13 18:05:34,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-11-13 18:05:34,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 812. [2021-11-13 18:05:34,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 620 states have (on average 1.2629032258064516) internal successors, (783), 631 states have internal predecessors, (783), 137 states have call successors, (137), 55 states have call predecessors, (137), 54 states have return successors, (133), 133 states have call predecessors, (133), 133 states have call successors, (133) [2021-11-13 18:05:34,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1053 transitions. [2021-11-13 18:05:34,117 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1053 transitions. Word has length 55 [2021-11-13 18:05:34,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:34,119 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1053 transitions. [2021-11-13 18:05:34,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 3 states have internal predecessors, (33), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:05:34,119 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1053 transitions. [2021-11-13 18:05:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 18:05:34,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:34,123 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:34,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:05:34,123 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:34,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:34,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1268938597, now seen corresponding path program 1 times [2021-11-13 18:05:34,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:34,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251478942] [2021-11-13 18:05:34,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:34,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:34,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:34,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:34,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:34,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:05:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:34,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:34,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:05:34,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:34,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251478942] [2021-11-13 18:05:34,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251478942] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:34,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:34,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:05:34,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098746313] [2021-11-13 18:05:34,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:34,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:05:34,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:34,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:05:34,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:05:34,367 INFO L87 Difference]: Start difference. First operand 812 states and 1053 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:05:34,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:34,855 INFO L93 Difference]: Finished difference Result 842 states and 1102 transitions. [2021-11-13 18:05:34,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:05:34,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2021-11-13 18:05:34,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:34,863 INFO L225 Difference]: With dead ends: 842 [2021-11-13 18:05:34,864 INFO L226 Difference]: Without dead ends: 839 [2021-11-13 18:05:34,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:05:34,866 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 273 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 321.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.64ms SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 391.93ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:34,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 583 Invalid, 180 Unknown, 0 Unchecked, 6.64ms Time], IncrementalHoareTripleChecker [63 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 391.93ms Time] [2021-11-13 18:05:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-11-13 18:05:34,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 811. [2021-11-13 18:05:34,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 620 states have (on average 1.261290322580645) internal successors, (782), 630 states have internal predecessors, (782), 136 states have call successors, (136), 55 states have call predecessors, (136), 54 states have return successors, (133), 133 states have call predecessors, (133), 133 states have call successors, (133) [2021-11-13 18:05:34,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1051 transitions. [2021-11-13 18:05:34,960 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1051 transitions. Word has length 56 [2021-11-13 18:05:34,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:34,961 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 1051 transitions. [2021-11-13 18:05:34,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:05:34,961 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1051 transitions. [2021-11-13 18:05:34,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 18:05:34,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:34,964 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:34,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:05:34,965 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:34,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:34,966 INFO L85 PathProgramCache]: Analyzing trace with hash 682405268, now seen corresponding path program 1 times [2021-11-13 18:05:34,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:34,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399599004] [2021-11-13 18:05:34,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:34,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:35,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:35,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:35,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:35,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:35,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:05:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:35,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:35,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:35,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:35,138 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:05:35,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:35,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399599004] [2021-11-13 18:05:35,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399599004] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:35,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:35,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:05:35,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508109960] [2021-11-13 18:05:35,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:35,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:05:35,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:35,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:05:35,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:05:35,146 INFO L87 Difference]: Start difference. First operand 811 states and 1051 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:05:35,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:35,683 INFO L93 Difference]: Finished difference Result 841 states and 1100 transitions. [2021-11-13 18:05:35,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:05:35,684 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2021-11-13 18:05:35,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:35,694 INFO L225 Difference]: With dead ends: 841 [2021-11-13 18:05:35,694 INFO L226 Difference]: Without dead ends: 838 [2021-11-13 18:05:35,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:05:35,701 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 270 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 361.01ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.25ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 425.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:35,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 579 Invalid, 179 Unknown, 0 Unchecked, 6.25ms Time], IncrementalHoareTripleChecker [62 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 425.24ms Time] [2021-11-13 18:05:35,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-11-13 18:05:35,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 810. [2021-11-13 18:05:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 620 states have (on average 1.2596774193548388) internal successors, (781), 629 states have internal predecessors, (781), 135 states have call successors, (135), 55 states have call predecessors, (135), 54 states have return successors, (133), 133 states have call predecessors, (133), 133 states have call successors, (133) [2021-11-13 18:05:35,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1049 transitions. [2021-11-13 18:05:35,775 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1049 transitions. Word has length 57 [2021-11-13 18:05:35,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:35,777 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 1049 transitions. [2021-11-13 18:05:35,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:05:35,778 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1049 transitions. [2021-11-13 18:05:35,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 18:05:35,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:35,780 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:35,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:05:35,781 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:35,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:35,782 INFO L85 PathProgramCache]: Analyzing trace with hash -320253880, now seen corresponding path program 1 times [2021-11-13 18:05:35,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:35,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330609117] [2021-11-13 18:05:35,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:35,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:35,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:35,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:35,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:35,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:35,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:05:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:35,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:05:36,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:36,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330609117] [2021-11-13 18:05:36,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330609117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:36,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:36,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:05:36,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208180246] [2021-11-13 18:05:36,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:36,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:05:36,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:36,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:05:36,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:05:36,017 INFO L87 Difference]: Start difference. First operand 810 states and 1049 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:05:36,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:36,430 INFO L93 Difference]: Finished difference Result 840 states and 1098 transitions. [2021-11-13 18:05:36,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:05:36,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2021-11-13 18:05:36,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:36,438 INFO L225 Difference]: With dead ends: 840 [2021-11-13 18:05:36,438 INFO L226 Difference]: Without dead ends: 829 [2021-11-13 18:05:36,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:05:36,441 INFO L933 BasicCegarLoop]: 273 mSDtfsCounter, 307 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 274.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.87ms SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 321.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:36,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 426 Invalid, 166 Unknown, 0 Unchecked, 4.87ms Time], IncrementalHoareTripleChecker [97 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 321.89ms Time] [2021-11-13 18:05:36,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-11-13 18:05:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 801. [2021-11-13 18:05:36,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 612 states have (on average 1.2581699346405228) internal successors, (770), 620 states have internal predecessors, (770), 134 states have call successors, (134), 55 states have call predecessors, (134), 54 states have return successors, (133), 133 states have call predecessors, (133), 133 states have call successors, (133) [2021-11-13 18:05:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1037 transitions. [2021-11-13 18:05:36,516 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1037 transitions. Word has length 58 [2021-11-13 18:05:36,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:36,516 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 1037 transitions. [2021-11-13 18:05:36,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-13 18:05:36,517 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1037 transitions. [2021-11-13 18:05:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-13 18:05:36,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:36,527 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:36,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:05:36,527 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:36,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:36,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1089358151, now seen corresponding path program 1 times [2021-11-13 18:05:36,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:36,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855460460] [2021-11-13 18:05:36,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:36,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-13 18:05:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-11-13 18:05:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-11-13 18:05:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 18:05:36,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:36,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-13 18:05:36,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:36,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 18:05:36,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 18:05:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-13 18:05:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-11-13 18:05:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-13 18:05:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:36,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:36,860 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:05:36,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:36,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855460460] [2021-11-13 18:05:36,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855460460] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:36,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:36,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:05:36,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299113262] [2021-11-13 18:05:36,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:36,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:05:36,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:36,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:05:36,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:05:36,865 INFO L87 Difference]: Start difference. First operand 801 states and 1037 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:05:37,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:37,561 INFO L93 Difference]: Finished difference Result 1679 states and 2193 transitions. [2021-11-13 18:05:37,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:05:37,562 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 152 [2021-11-13 18:05:37,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:37,570 INFO L225 Difference]: With dead ends: 1679 [2021-11-13 18:05:37,570 INFO L226 Difference]: Without dead ends: 893 [2021-11-13 18:05:37,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:05:37,574 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 224 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 469.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.00ms SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 554.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:37,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 805 Invalid, 344 Unknown, 0 Unchecked, 8.00ms Time], IncrementalHoareTripleChecker [179 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 554.24ms Time] [2021-11-13 18:05:37,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-11-13 18:05:37,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 855. [2021-11-13 18:05:37,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 665 states have (on average 1.2691729323308272) internal successors, (844), 673 states have internal predecessors, (844), 134 states have call successors, (134), 56 states have call predecessors, (134), 55 states have return successors, (133), 133 states have call predecessors, (133), 133 states have call successors, (133) [2021-11-13 18:05:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1111 transitions. [2021-11-13 18:05:37,647 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1111 transitions. Word has length 152 [2021-11-13 18:05:37,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:37,648 INFO L470 AbstractCegarLoop]: Abstraction has 855 states and 1111 transitions. [2021-11-13 18:05:37,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:05:37,648 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1111 transitions. [2021-11-13 18:05:37,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-13 18:05:37,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:37,654 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:37,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:05:37,654 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:37,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1490878930, now seen corresponding path program 1 times [2021-11-13 18:05:37,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:37,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957021128] [2021-11-13 18:05:37,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:37,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:05:37,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:37,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:05:37,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-11-13 18:05:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-13 18:05:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 18:05:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-11-13 18:05:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:05:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-13 18:05:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-13 18:05:37,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-11-13 18:05:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:05:37,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:37,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957021128] [2021-11-13 18:05:37,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957021128] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:37,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:37,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-13 18:05:37,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13377415] [2021-11-13 18:05:37,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:37,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:05:37,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:37,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:05:37,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:05:37,988 INFO L87 Difference]: Start difference. First operand 855 states and 1111 transitions. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:05:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:38,808 INFO L93 Difference]: Finished difference Result 2289 states and 3072 transitions. [2021-11-13 18:05:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:05:38,809 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 161 [2021-11-13 18:05:38,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:38,821 INFO L225 Difference]: With dead ends: 2289 [2021-11-13 18:05:38,822 INFO L226 Difference]: Without dead ends: 1453 [2021-11-13 18:05:38,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:05:38,826 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 382 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 566.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 2075 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.10ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 666.38ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:38,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 2075 Invalid, 456 Unknown, 0 Unchecked, 15.10ms Time], IncrementalHoareTripleChecker [59 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 666.38ms Time] [2021-11-13 18:05:38,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-11-13 18:05:38,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 867. [2021-11-13 18:05:38,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 677 states have (on average 1.2644017725258494) internal successors, (856), 685 states have internal predecessors, (856), 134 states have call successors, (134), 56 states have call predecessors, (134), 55 states have return successors, (133), 133 states have call predecessors, (133), 133 states have call successors, (133) [2021-11-13 18:05:38,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1123 transitions. [2021-11-13 18:05:38,958 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1123 transitions. Word has length 161 [2021-11-13 18:05:38,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:38,959 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 1123 transitions. [2021-11-13 18:05:38,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 5 states have internal predecessors, (97), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:05:38,960 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1123 transitions. [2021-11-13 18:05:38,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-13 18:05:38,966 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:38,966 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:38,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:05:38,967 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:38,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1123553049, now seen corresponding path program 1 times [2021-11-13 18:05:38,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:38,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897456207] [2021-11-13 18:05:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:38,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:39,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:05:39,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:39,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:05:39,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:05:39,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:05:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 18:05:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 18:05:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-13 18:05:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-13 18:05:39,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-13 18:05:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 18:05:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:05:39,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:39,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897456207] [2021-11-13 18:05:39,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897456207] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:05:39,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33974067] [2021-11-13 18:05:39,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:39,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:39,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:05:39,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:05:39,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:05:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:39,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:05:39,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:05:40,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:05:40,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33974067] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:40,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:05:40,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-11-13 18:05:40,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343303697] [2021-11-13 18:05:40,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:40,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:05:40,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:40,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:05:40,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:05:40,231 INFO L87 Difference]: Start difference. First operand 867 states and 1123 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:05:40,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:40,582 INFO L93 Difference]: Finished difference Result 2809 states and 3670 transitions. [2021-11-13 18:05:40,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:05:40,583 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 163 [2021-11-13 18:05:40,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:40,599 INFO L225 Difference]: With dead ends: 2809 [2021-11-13 18:05:40,599 INFO L226 Difference]: Without dead ends: 1961 [2021-11-13 18:05:40,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:05:40,604 INFO L933 BasicCegarLoop]: 582 mSDtfsCounter, 395 mSDsluCounter, 1291 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 1873 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.12ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 129.18ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:40,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 1873 Invalid, 63 Unknown, 0 Unchecked, 8.12ms Time], IncrementalHoareTripleChecker [16 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 129.18ms Time] [2021-11-13 18:05:40,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-11-13 18:05:40,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 903. [2021-11-13 18:05:40,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 705 states have (on average 1.2539007092198582) internal successors, (884), 713 states have internal predecessors, (884), 142 states have call successors, (142), 56 states have call predecessors, (142), 55 states have return successors, (141), 141 states have call predecessors, (141), 141 states have call successors, (141) [2021-11-13 18:05:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1167 transitions. [2021-11-13 18:05:40,719 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1167 transitions. Word has length 163 [2021-11-13 18:05:40,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:40,720 INFO L470 AbstractCegarLoop]: Abstraction has 903 states and 1167 transitions. [2021-11-13 18:05:40,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:05:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1167 transitions. [2021-11-13 18:05:40,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-13 18:05:40,726 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:40,726 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:40,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:40,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 18:05:40,952 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:40,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:40,952 INFO L85 PathProgramCache]: Analyzing trace with hash 112435799, now seen corresponding path program 1 times [2021-11-13 18:05:40,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:40,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858265514] [2021-11-13 18:05:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:40,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:05:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:05:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:05:41,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:05:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 18:05:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 18:05:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-13 18:05:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-11-13 18:05:41,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-13 18:05:41,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-13 18:05:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 18:05:41,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:41,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858265514] [2021-11-13 18:05:41,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858265514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:05:41,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779810723] [2021-11-13 18:05:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:41,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:41,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:05:41,296 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:05:41,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:05:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:41,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 1298 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 18:05:41,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 18:05:42,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:05:42,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779810723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:42,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:05:42,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2021-11-13 18:05:42,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367289415] [2021-11-13 18:05:42,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:42,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:05:42,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:42,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:05:42,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:05:42,330 INFO L87 Difference]: Start difference. First operand 903 states and 1167 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:05:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:42,507 INFO L93 Difference]: Finished difference Result 2153 states and 2858 transitions. [2021-11-13 18:05:42,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:05:42,509 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 163 [2021-11-13 18:05:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:42,520 INFO L225 Difference]: With dead ends: 2153 [2021-11-13 18:05:42,520 INFO L226 Difference]: Without dead ends: 1269 [2021-11-13 18:05:42,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-13 18:05:42,524 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 91 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1855 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.47ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.63ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:42,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 1855 Invalid, 23 Unknown, 0 Unchecked, 6.47ms Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 27.63ms Time] [2021-11-13 18:05:42,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-11-13 18:05:42,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 923. [2021-11-13 18:05:42,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 721 states have (on average 1.248266296809986) internal successors, (900), 729 states have internal predecessors, (900), 142 states have call successors, (142), 56 states have call predecessors, (142), 59 states have return successors, (161), 145 states have call predecessors, (161), 141 states have call successors, (161) [2021-11-13 18:05:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1203 transitions. [2021-11-13 18:05:42,642 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1203 transitions. Word has length 163 [2021-11-13 18:05:42,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:42,643 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 1203 transitions. [2021-11-13 18:05:42,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 5 states have internal predecessors, (104), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:05:42,644 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1203 transitions. [2021-11-13 18:05:42,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-13 18:05:42,649 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:42,650 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:42,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:42,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-13 18:05:42,864 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:42,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:42,864 INFO L85 PathProgramCache]: Analyzing trace with hash -853180109, now seen corresponding path program 1 times [2021-11-13 18:05:42,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:42,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859983023] [2021-11-13 18:05:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:42,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:42,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:05:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:43,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:05:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-11-13 18:05:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:05:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 18:05:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 18:05:43,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-11-13 18:05:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-11-13 18:05:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-11-13 18:05:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-13 18:05:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,275 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:05:43,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:43,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859983023] [2021-11-13 18:05:43,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859983023] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:05:43,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026882096] [2021-11-13 18:05:43,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:43,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:43,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:05:43,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:05:43,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:05:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:43,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 1320 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-13 18:05:43,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:05:44,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:05:44,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026882096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:44,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:05:44,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 9 [2021-11-13 18:05:44,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273928378] [2021-11-13 18:05:44,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:44,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:05:44,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:44,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:05:44,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:05:44,350 INFO L87 Difference]: Start difference. First operand 923 states and 1203 transitions. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:05:44,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:44,473 INFO L93 Difference]: Finished difference Result 1847 states and 2419 transitions. [2021-11-13 18:05:44,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:05:44,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 169 [2021-11-13 18:05:44,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:44,483 INFO L225 Difference]: With dead ends: 1847 [2021-11-13 18:05:44,483 INFO L226 Difference]: Without dead ends: 943 [2021-11-13 18:05:44,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:05:44,487 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 1 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.89ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.73ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:44,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1118 Invalid, 17 Unknown, 0 Unchecked, 3.89ms Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 17.73ms Time] [2021-11-13 18:05:44,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-11-13 18:05:44,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 931. [2021-11-13 18:05:44,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 729 states have (on average 1.2455418381344308) internal successors, (908), 733 states have internal predecessors, (908), 142 states have call successors, (142), 56 states have call predecessors, (142), 59 states have return successors, (161), 149 states have call predecessors, (161), 141 states have call successors, (161) [2021-11-13 18:05:44,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1211 transitions. [2021-11-13 18:05:44,635 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1211 transitions. Word has length 169 [2021-11-13 18:05:44,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:44,636 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 1211 transitions. [2021-11-13 18:05:44,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 4 states have internal predecessors, (107), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:05:44,637 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1211 transitions. [2021-11-13 18:05:44,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-13 18:05:44,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:44,643 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:44,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:44,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:44,872 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:44,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:44,872 INFO L85 PathProgramCache]: Analyzing trace with hash -68871857, now seen corresponding path program 2 times [2021-11-13 18:05:44,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:44,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124748810] [2021-11-13 18:05:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:44,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:05:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:05:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:05:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:05:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-13 18:05:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 18:05:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-13 18:05:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-13 18:05:45,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-13 18:05:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-13 18:05:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 18:05:45,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:45,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124748810] [2021-11-13 18:05:45,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124748810] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:05:45,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796951363] [2021-11-13 18:05:45,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:05:45,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:45,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:05:45,452 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:05:45,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:05:45,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-13 18:05:45,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:05:45,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-13 18:05:45,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 18:05:46,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:05:46,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796951363] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:46,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:05:46,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2021-11-13 18:05:46,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652044127] [2021-11-13 18:05:46,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:46,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:05:46,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:46,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:05:46,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:05:46,420 INFO L87 Difference]: Start difference. First operand 931 states and 1211 transitions. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:05:46,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:46,889 INFO L93 Difference]: Finished difference Result 1893 states and 2543 transitions. [2021-11-13 18:05:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:05:46,890 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 175 [2021-11-13 18:05:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:46,902 INFO L225 Difference]: With dead ends: 1893 [2021-11-13 18:05:46,902 INFO L226 Difference]: Without dead ends: 1433 [2021-11-13 18:05:46,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:05:46,905 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 587 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 161.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 1809 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.17ms SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 193.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:46,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 1809 Invalid, 133 Unknown, 0 Unchecked, 10.17ms Time], IncrementalHoareTripleChecker [81 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 193.75ms Time] [2021-11-13 18:05:46,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2021-11-13 18:05:47,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 937. [2021-11-13 18:05:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 735 states have (on average 1.2435374149659864) internal successors, (914), 739 states have internal predecessors, (914), 142 states have call successors, (142), 56 states have call predecessors, (142), 59 states have return successors, (161), 149 states have call predecessors, (161), 141 states have call successors, (161) [2021-11-13 18:05:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 1217 transitions. [2021-11-13 18:05:47,024 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 1217 transitions. Word has length 175 [2021-11-13 18:05:47,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:47,024 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 1217 transitions. [2021-11-13 18:05:47,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:05:47,025 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 1217 transitions. [2021-11-13 18:05:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-13 18:05:47,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:47,031 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:47,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:47,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-13 18:05:47,248 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:47,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1068489238, now seen corresponding path program 1 times [2021-11-13 18:05:47,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:47,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326380020] [2021-11-13 18:05:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:47,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:47,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:05:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:05:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:05:47,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:05:47,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-13 18:05:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 18:05:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-13 18:05:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-13 18:05:47,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-11-13 18:05:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-11-13 18:05:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-13 18:05:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-11-13 18:05:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 18:05:47,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:47,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326380020] [2021-11-13 18:05:47,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326380020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:05:47,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405188033] [2021-11-13 18:05:47,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:47,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:47,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:05:47,639 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:05:47,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:05:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:48,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 1619 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:05:48,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:48,840 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-13 18:05:48,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:05:48,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405188033] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:48,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:05:48,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 9 [2021-11-13 18:05:48,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369240532] [2021-11-13 18:05:48,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:48,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:05:48,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:48,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:05:48,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:05:48,844 INFO L87 Difference]: Start difference. First operand 937 states and 1217 transitions. Second operand has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-13 18:05:49,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:49,270 INFO L93 Difference]: Finished difference Result 2775 states and 3614 transitions. [2021-11-13 18:05:49,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:05:49,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 206 [2021-11-13 18:05:49,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:49,294 INFO L225 Difference]: With dead ends: 2775 [2021-11-13 18:05:49,295 INFO L226 Difference]: Without dead ends: 2767 [2021-11-13 18:05:49,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:05:49,298 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 399 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 154.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.76ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 185.02ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:49,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 1079 Invalid, 92 Unknown, 0 Unchecked, 6.76ms Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 185.02ms Time] [2021-11-13 18:05:49,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2767 states. [2021-11-13 18:05:49,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2767 to 2753. [2021-11-13 18:05:49,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2163 states have (on average 1.2473416551086454) internal successors, (2698), 2179 states have internal predecessors, (2698), 418 states have call successors, (418), 160 states have call predecessors, (418), 171 states have return successors, (477), 437 states have call predecessors, (477), 417 states have call successors, (477) [2021-11-13 18:05:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 3593 transitions. [2021-11-13 18:05:49,703 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 3593 transitions. Word has length 206 [2021-11-13 18:05:49,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:49,704 INFO L470 AbstractCegarLoop]: Abstraction has 2753 states and 3593 transitions. [2021-11-13 18:05:49,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.5) internal successors, (134), 4 states have internal predecessors, (134), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-13 18:05:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 3593 transitions. [2021-11-13 18:05:49,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-13 18:05:49,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:49,714 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:49,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-13 18:05:49,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:49,928 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:49,928 INFO L85 PathProgramCache]: Analyzing trace with hash 57371988, now seen corresponding path program 1 times [2021-11-13 18:05:49,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:49,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141799856] [2021-11-13 18:05:49,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:49,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:05:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:05:50,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:05:50,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:05:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-13 18:05:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 18:05:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-13 18:05:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-13 18:05:50,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-11-13 18:05:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-11-13 18:05:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-13 18:05:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-11-13 18:05:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-13 18:05:50,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:50,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141799856] [2021-11-13 18:05:50,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141799856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:50,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:50,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:05:50,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845905963] [2021-11-13 18:05:50,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:50,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:05:50,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:50,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:05:50,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:05:50,252 INFO L87 Difference]: Start difference. First operand 2753 states and 3593 transitions. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (18), 6 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-13 18:05:52,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:52,060 INFO L93 Difference]: Finished difference Result 8847 states and 11608 transitions. [2021-11-13 18:05:52,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 18:05:52,061 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (18), 6 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 206 [2021-11-13 18:05:52,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:52,111 INFO L225 Difference]: With dead ends: 8847 [2021-11-13 18:05:52,111 INFO L226 Difference]: Without dead ends: 6113 [2021-11-13 18:05:52,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:05:52,127 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 466 mSDsluCounter, 1285 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 919.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 1634 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.80ms SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1065.08ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:52,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 1634 Invalid, 697 Unknown, 0 Unchecked, 20.80ms Time], IncrementalHoareTripleChecker [204 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 1065.08ms Time] [2021-11-13 18:05:52,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6113 states. [2021-11-13 18:05:52,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6113 to 2765. [2021-11-13 18:05:52,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2765 states, 2175 states have (on average 1.2459770114942528) internal successors, (2710), 2195 states have internal predecessors, (2710), 418 states have call successors, (418), 160 states have call predecessors, (418), 171 states have return successors, (477), 433 states have call predecessors, (477), 417 states have call successors, (477) [2021-11-13 18:05:52,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2765 states to 2765 states and 3605 transitions. [2021-11-13 18:05:52,644 INFO L78 Accepts]: Start accepts. Automaton has 2765 states and 3605 transitions. Word has length 206 [2021-11-13 18:05:52,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:52,650 INFO L470 AbstractCegarLoop]: Abstraction has 2765 states and 3605 transitions. [2021-11-13 18:05:52,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (18), 6 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-13 18:05:52,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2765 states and 3605 transitions. [2021-11-13 18:05:52,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-13 18:05:52,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:52,661 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:52,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:05:52,662 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:52,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:52,662 INFO L85 PathProgramCache]: Analyzing trace with hash 570510040, now seen corresponding path program 1 times [2021-11-13 18:05:52,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:52,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064074399] [2021-11-13 18:05:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:52,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:52,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:52,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-11-13 18:05:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-13 18:05:53,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 18:05:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 18:05:53,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:05:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2021-11-13 18:05:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 18:05:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:05:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-11-13 18:05:53,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-11-13 18:05:53,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-11-13 18:05:53,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-11-13 18:05:53,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-13 18:05:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-11-13 18:05:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2021-11-13 18:05:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-13 18:05:53,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:53,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064074399] [2021-11-13 18:05:53,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064074399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:05:53,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189284514] [2021-11-13 18:05:53,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:53,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:05:53,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:05:53,304 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:05:53,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:05:53,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:53,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 1631 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-13 18:05:53,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:53,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:05:53,969 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 7 treesize of output 6 [2021-11-13 18:05:55,254 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 13 treesize of output 12 [2021-11-13 18:05:55,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-11-13 18:06:05,451 INFO L354 Elim1Store]: treesize reduction 16, result has 23.8 percent of original size [2021-11-13 18:06:05,451 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 1 case distinctions, treesize of input 24 treesize of output 26 [2021-11-13 18:06:05,459 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-13 18:06:05,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 23 treesize of output 23 [2021-11-13 18:09:17,748 INFO L354 Elim1Store]: treesize reduction 29, result has 38.3 percent of original size [2021-11-13 18:09:17,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 51 [2021-11-13 18:09:17,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2021-11-13 18:10:09,488 INFO L354 Elim1Store]: treesize reduction 29, result has 38.3 percent of original size [2021-11-13 18:10:09,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 73 [2021-11-13 18:10:09,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2021-11-13 18:10:23,836 INFO L354 Elim1Store]: treesize reduction 29, result has 38.3 percent of original size [2021-11-13 18:10:23,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 111 [2021-11-13 18:10:23,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-11-13 18:10:23,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:10:23,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-13 18:10:23,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660265896] [2021-11-13 18:10:23,845 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-13 18:10:23,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-13 18:10:23,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:10:23,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-13 18:10:23,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1593, Unknown=46, NotChecked=0, Total=1806 [2021-11-13 18:10:23,848 INFO L87 Difference]: Start difference. First operand 2765 states and 3605 transitions. Second operand has 13 states, 13 states have (on average 10.461538461538462) internal successors, (136), 7 states have internal predecessors, (136), 3 states have call successors, (19), 6 states have call predecessors, (19), 3 states have return successors, (19), 5 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 18:10:23,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:10:23,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 147 SyntacticMatches, 12 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 265.2s TimeCoverageRelationStatistics Valid=167, Invalid=1593, Unknown=46, NotChecked=0, Total=1806 [2021-11-13 18:10:23,850 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.04ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:23,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 1 Unknown, 0 Unchecked, 0.04ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:10:23,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:24,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 18:10:24,064 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@74144928 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:359) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:10:24,068 INFO L158 Benchmark]: Toolchain (without parser) took 299499.73ms. Allocated memory was 115.3MB in the beginning and 343.9MB in the end (delta: 228.6MB). Free memory was 79.6MB in the beginning and 246.4MB in the end (delta: -166.8MB). Peak memory consumption was 60.3MB. Max. memory is 16.1GB. [2021-11-13 18:10:24,068 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 115.3MB. Free memory is still 70.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:10:24,068 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1516.49ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 79.6MB in the beginning and 59.3MB in the end (delta: 20.3MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2021-11-13 18:10:24,069 INFO L158 Benchmark]: Boogie Procedure Inliner took 170.90ms. Allocated memory is still 138.4MB. Free memory was 59.3MB in the beginning and 52.9MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-13 18:10:24,069 INFO L158 Benchmark]: Boogie Preprocessor took 122.49ms. Allocated memory is still 138.4MB. Free memory was 52.9MB in the beginning and 47.5MB in the end (delta: 5.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-13 18:10:24,069 INFO L158 Benchmark]: RCFGBuilder took 1795.18ms. Allocated memory is still 138.4MB. Free memory was 47.5MB in the beginning and 95.8MB in the end (delta: -48.3MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. [2021-11-13 18:10:24,070 INFO L158 Benchmark]: TraceAbstraction took 295887.22ms. Allocated memory was 138.4MB in the beginning and 343.9MB in the end (delta: 205.5MB). Free memory was 95.8MB in the beginning and 246.4MB in the end (delta: -150.6MB). Peak memory consumption was 53.9MB. Max. memory is 16.1GB. [2021-11-13 18:10:24,074 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 115.3MB. Free memory is still 70.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1516.49ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 79.6MB in the beginning and 59.3MB in the end (delta: 20.3MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 170.90ms. Allocated memory is still 138.4MB. Free memory was 59.3MB in the beginning and 52.9MB in the end (delta: 6.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 122.49ms. Allocated memory is still 138.4MB. Free memory was 52.9MB in the beginning and 47.5MB in the end (delta: 5.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1795.18ms. Allocated memory is still 138.4MB. Free memory was 47.5MB in the beginning and 95.8MB in the end (delta: -48.3MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. * TraceAbstraction took 295887.22ms. Allocated memory was 138.4MB in the beginning and 343.9MB in the end (delta: 205.5MB). Free memory was 95.8MB in the beginning and 246.4MB in the end (delta: -150.6MB). Peak memory consumption was 53.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@74144928 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@74144928: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:10:24,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/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_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/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 64bit --witnessprinter.graph.data.programhash 8bd4d18c7774801c1dd2fcc01cd37afd9da2c99096cf08f4bd160d17156b286b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:10:26,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:10:26,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:10:26,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:10:26,674 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:10:26,679 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:10:26,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:10:26,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:10:26,691 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:10:26,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:10:26,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:10:26,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:10:26,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:10:26,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:10:26,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:10:26,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:10:26,714 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:10:26,715 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:10:26,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:10:26,732 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:10:26,735 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:10:26,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:10:26,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:10:26,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:10:26,745 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:10:26,746 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:10:26,746 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:10:26,748 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:10:26,749 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:10:26,750 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:10:26,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:10:26,751 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:10:26,753 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:10:26,754 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:10:26,756 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:10:26,756 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:10:26,757 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:10:26,757 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:10:26,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:10:26,760 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:10:26,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:10:26,766 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-13 18:10:26,812 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:10:26,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:10:26,813 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:10:26,813 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:10:26,814 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:10:26,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:10:26,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:10:26,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:10:26,817 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:10:26,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:10:26,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:10:26,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:10:26,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:10:26,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:10:26,819 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:10:26,819 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:10:26,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:10:26,820 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:10:26,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:10:26,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:10:26,821 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:10:26,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:10:26,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:10:26,822 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:10:26,822 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:10:26,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:10:26,822 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:10:26,822 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:10:26,823 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:10:26,823 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:10:26,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:10:26,823 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:10:26,824 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:10:26,824 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_552290e3-e871-475a-9cda-67b6e59acc0b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd4d18c7774801c1dd2fcc01cd37afd9da2c99096cf08f4bd160d17156b286b [2021-11-13 18:10:27,244 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:10:27,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:10:27,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:10:27,283 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:10:27,283 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:10:27,285 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-13 18:10:27,365 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/data/345dc8a00/c167fda11fb046b785db64788e9a7321/FLAG2a5659978 [2021-11-13 18:10:28,191 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:10:28,192 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-13 18:10:28,232 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/data/345dc8a00/c167fda11fb046b785db64788e9a7321/FLAG2a5659978 [2021-11-13 18:10:28,271 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/data/345dc8a00/c167fda11fb046b785db64788e9a7321 [2021-11-13 18:10:28,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:10:28,274 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:10:28,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:10:28,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:10:28,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:10:28,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:10:28" (1/1) ... [2021-11-13 18:10:28,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@499e8769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:10:28, skipping insertion in model container [2021-11-13 18:10:28,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:10:28" (1/1) ... [2021-11-13 18:10:28,290 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:10:28,365 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:10:29,292 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_552290e3-e871-475a-9cda-67b6e59acc0b/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113815,113828] [2021-11-13 18:10:29,369 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:10:29,396 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:10:29,562 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_552290e3-e871-475a-9cda-67b6e59acc0b/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113815,113828] [2021-11-13 18:10:29,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:10:29,616 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:10:29,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:10:29 WrapperNode [2021-11-13 18:10:29,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:10:29,618 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:10:29,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:10:29,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:10:29,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:10:29" (1/1) ... [2021-11-13 18:10:29,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:10:29" (1/1) ... [2021-11-13 18:10:29,785 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:10:29,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:10:29,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:10:29,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:10:29,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:10:29" (1/1) ... [2021-11-13 18:10:29,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:10:29" (1/1) ... [2021-11-13 18:10:29,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:10:29" (1/1) ... [2021-11-13 18:10:29,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:10:29" (1/1) ... [2021-11-13 18:10:29,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:10:29" (1/1) ... [2021-11-13 18:10:29,873 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:10:29" (1/1) ... [2021-11-13 18:10:29,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:10:29" (1/1) ... [2021-11-13 18:10:29,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:10:29,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:10:29,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:10:29,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:10:29,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:10:29" (1/1) ... [2021-11-13 18:10:29,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:10:29,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:10:29,950 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:10:29,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:10:30,029 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 18:10:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 18:10:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 18:10:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-13 18:10:30,030 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:10:30,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:10:30,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-13 18:10:30,031 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-13 18:10:30,031 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:10:30,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:10:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 18:10:30,034 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 18:10:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2021-11-13 18:10:30,034 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2021-11-13 18:10:30,034 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:10:30,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:10:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 18:10:30,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 18:10:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure usb_acecad_disconnect [2021-11-13 18:10:30,035 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_acecad_disconnect [2021-11-13 18:10:30,035 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-13 18:10:30,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-13 18:10:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:10:30,036 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:10:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:10:30,036 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-13 18:10:30,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-13 18:10:30,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:10:30,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:10:30,037 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2021-11-13 18:10:30,037 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2021-11-13 18:10:30,037 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-13 18:10:30,037 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-13 18:10:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_7 [2021-11-13 18:10:30,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_7 [2021-11-13 18:10:30,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:10:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 18:10:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 18:10:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:10:30,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 18:10:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:10:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-13 18:10:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-13 18:10:30,040 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-13 18:10:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:10:30,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 18:10:30,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 18:10:30,041 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 18:10:30,041 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 18:10:30,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:10:30,041 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:10:30,624 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:10:33,955 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:10:33,955 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:10:33,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:10:33 BoogieIcfgContainer [2021-11-13 18:10:33,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:10:33,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:10:33,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:10:33,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:10:33,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:10:28" (1/3) ... [2021-11-13 18:10:33,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b8e9efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:10:33, skipping insertion in model container [2021-11-13 18:10:33,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:10:29" (2/3) ... [2021-11-13 18:10:33,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b8e9efc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:10:33, skipping insertion in model container [2021-11-13 18:10:33,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:10:33" (3/3) ... [2021-11-13 18:10:33,984 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-13 18:10:34,017 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:10:34,017 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:10:34,087 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:10:34,107 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 18:10:34,112 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:10:34,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 233 states, 173 states have (on average 1.3121387283236994) internal successors, (227), 184 states have internal predecessors, (227), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2021-11-13 18:10:34,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 18:10:34,156 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:34,157 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:34,158 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:34,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:34,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1664570800, now seen corresponding path program 1 times [2021-11-13 18:10:34,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:10:34,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1149453450] [2021-11-13 18:10:34,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:34,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:10:34,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:10:34,194 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:10:34,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:10:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:34,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-13 18:10:34,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:34,779 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 18:10:34,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:34,938 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 18:10:34,940 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:34,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1149453450] [2021-11-13 18:10:34,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1149453450] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:34,942 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:34,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-13 18:10:34,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240757140] [2021-11-13 18:10:34,945 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:34,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 18:10:34,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:34,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 18:10:34,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 18:10:34,993 INFO L87 Difference]: Start difference. First operand has 233 states, 173 states have (on average 1.3121387283236994) internal successors, (227), 184 states have internal predecessors, (227), 43 states have call successors, (43), 16 states have call predecessors, (43), 15 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) Second operand has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:10:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:35,048 INFO L93 Difference]: Finished difference Result 461 states and 624 transitions. [2021-11-13 18:10:35,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 18:10:35,052 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-11-13 18:10:35,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:35,066 INFO L225 Difference]: With dead ends: 461 [2021-11-13 18:10:35,068 INFO L226 Difference]: Without dead ends: 222 [2021-11-13 18:10:35,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 62 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 18:10:35,079 INFO L933 BasicCegarLoop]: 302 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, 302 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.21ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:35,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 3.21ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:10:35,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-13 18:10:35,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-11-13 18:10:35,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 168 states have (on average 1.2797619047619047) internal successors, (215), 173 states have internal predecessors, (215), 39 states have call successors, (39), 15 states have call predecessors, (39), 14 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-13 18:10:35,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 289 transitions. [2021-11-13 18:10:35,198 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 289 transitions. Word has length 32 [2021-11-13 18:10:35,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:35,202 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 289 transitions. [2021-11-13 18:10:35,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 12.5) internal successors, (25), 2 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:10:35,205 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 289 transitions. [2021-11-13 18:10:35,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-13 18:10:35,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:35,208 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:35,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:35,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:10:35,423 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:35,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:35,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1241868974, now seen corresponding path program 1 times [2021-11-13 18:10:35,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:10:35,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1098277001] [2021-11-13 18:10:35,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:35,425 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:10:35,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:10:35,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:10:35,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:10:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:35,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:10:35,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:35,872 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 18:10:35,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:35,991 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 18:10:35,992 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:35,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1098277001] [2021-11-13 18:10:35,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1098277001] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:35,992 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:35,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:10:35,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991676066] [2021-11-13 18:10:35,993 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:35,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:10:35,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:35,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:10:35,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:10:35,997 INFO L87 Difference]: Start difference. First operand 222 states and 289 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:10:36,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:36,763 INFO L93 Difference]: Finished difference Result 814 states and 1068 transitions. [2021-11-13 18:10:36,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:10:36,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2021-11-13 18:10:36,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:36,771 INFO L225 Difference]: With dead ends: 814 [2021-11-13 18:10:36,771 INFO L226 Difference]: Without dead ends: 597 [2021-11-13 18:10:36,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:10:36,774 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 518 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 603.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.43ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 681.22ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:36,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [518 Valid, 1029 Invalid, 103 Unknown, 0 Unchecked, 11.43ms Time], IncrementalHoareTripleChecker [7 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 681.22ms Time] [2021-11-13 18:10:36,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-11-13 18:10:36,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 597. [2021-11-13 18:10:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 453 states have (on average 1.2781456953642385) internal successors, (579), 462 states have internal predecessors, (579), 103 states have call successors, (103), 41 states have call predecessors, (103), 40 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-13 18:10:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 781 transitions. [2021-11-13 18:10:36,877 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 781 transitions. Word has length 32 [2021-11-13 18:10:36,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:36,878 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 781 transitions. [2021-11-13 18:10:36,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-13 18:10:36,879 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 781 transitions. [2021-11-13 18:10:36,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 18:10:36,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:36,890 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:36,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:37,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:10:37,104 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:37,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:37,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1658921169, now seen corresponding path program 1 times [2021-11-13 18:10:37,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:10:37,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [874205443] [2021-11-13 18:10:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:37,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:10:37,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:10:37,107 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:10:37,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:10:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:37,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:10:37,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:10:37,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:10:37,777 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:37,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [874205443] [2021-11-13 18:10:37,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [874205443] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:37,777 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:37,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 18:10:37,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115503738] [2021-11-13 18:10:37,778 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:37,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:10:37,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:37,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:10:37,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:10:37,781 INFO L87 Difference]: Start difference. First operand 597 states and 781 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:10:38,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:38,121 INFO L93 Difference]: Finished difference Result 1454 states and 1955 transitions. [2021-11-13 18:10:38,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:10:38,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2021-11-13 18:10:38,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:38,133 INFO L225 Difference]: With dead ends: 1454 [2021-11-13 18:10:38,133 INFO L226 Difference]: Without dead ends: 872 [2021-11-13 18:10:38,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:10:38,139 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 623 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 188.66ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.61ms SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 225.49ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:38,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 1116 Invalid, 106 Unknown, 0 Unchecked, 9.61ms Time], IncrementalHoareTripleChecker [62 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 225.49ms Time] [2021-11-13 18:10:38,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2021-11-13 18:10:38,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 600. [2021-11-13 18:10:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 456 states have (on average 1.2741228070175439) internal successors, (581), 465 states have internal predecessors, (581), 103 states have call successors, (103), 41 states have call predecessors, (103), 40 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2021-11-13 18:10:38,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 783 transitions. [2021-11-13 18:10:38,211 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 783 transitions. Word has length 55 [2021-11-13 18:10:38,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:38,212 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 783 transitions. [2021-11-13 18:10:38,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:10:38,213 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 783 transitions. [2021-11-13 18:10:38,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-13 18:10:38,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:38,216 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:38,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:38,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:10:38,433 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:38,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:38,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1898729455, now seen corresponding path program 1 times [2021-11-13 18:10:38,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:10:38,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1958352985] [2021-11-13 18:10:38,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:38,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:10:38,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:10:38,438 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:10:38,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:10:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:38,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:10:38,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:39,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:10:39,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:39,246 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:10:39,247 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:39,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1958352985] [2021-11-13 18:10:39,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1958352985] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:39,247 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:39,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:10:39,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365958658] [2021-11-13 18:10:39,248 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:39,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:10:39,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:39,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:10:39,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:10:39,249 INFO L87 Difference]: Start difference. First operand 600 states and 783 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:10:39,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:39,366 INFO L93 Difference]: Finished difference Result 1763 states and 2311 transitions. [2021-11-13 18:10:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:10:39,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 55 [2021-11-13 18:10:39,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:39,377 INFO L225 Difference]: With dead ends: 1763 [2021-11-13 18:10:39,377 INFO L226 Difference]: Without dead ends: 1178 [2021-11-13 18:10:39,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 107 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 18:10:39,382 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 245 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.04ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:39,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 659 Invalid, 13 Unknown, 0 Unchecked, 5.04ms Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 23.30ms Time] [2021-11-13 18:10:39,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2021-11-13 18:10:39,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1176. [2021-11-13 18:10:39,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 898 states have (on average 1.2683741648106903) internal successors, (1139), 913 states have internal predecessors, (1139), 199 states have call successors, (199), 79 states have call predecessors, (199), 78 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2021-11-13 18:10:39,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 1533 transitions. [2021-11-13 18:10:39,505 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 1533 transitions. Word has length 55 [2021-11-13 18:10:39,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:39,506 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 1533 transitions. [2021-11-13 18:10:39,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:10:39,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 1533 transitions. [2021-11-13 18:10:39,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 18:10:39,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:39,509 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:39,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:39,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:10:39,719 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:39,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:39,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1268938597, now seen corresponding path program 1 times [2021-11-13 18:10:39,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:10:39,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [974301938] [2021-11-13 18:10:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:39,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:10:39,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:10:39,722 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:10:39,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:10:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:40,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:10:40,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:10:40,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:10:40,460 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:40,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [974301938] [2021-11-13 18:10:40,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [974301938] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:40,461 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:40,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:10:40,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915452861] [2021-11-13 18:10:40,461 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:40,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:10:40,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:40,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:10:40,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:10:40,463 INFO L87 Difference]: Start difference. First operand 1176 states and 1533 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:10:40,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:40,534 INFO L93 Difference]: Finished difference Result 1178 states and 1534 transitions. [2021-11-13 18:10:40,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:10:40,535 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2021-11-13 18:10:40,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:40,543 INFO L225 Difference]: With dead ends: 1178 [2021-11-13 18:10:40,543 INFO L226 Difference]: Without dead ends: 1175 [2021-11-13 18:10:40,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 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 18:10:40,545 INFO L933 BasicCegarLoop]: 286 mSDtfsCounter, 247 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.80ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.26ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:40,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 286 Invalid, 1 Unknown, 0 Unchecked, 1.80ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 1.26ms Time] [2021-11-13 18:10:40,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2021-11-13 18:10:40,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1175. [2021-11-13 18:10:40,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 898 states have (on average 1.2672605790645879) internal successors, (1138), 912 states have internal predecessors, (1138), 198 states have call successors, (198), 79 states have call predecessors, (198), 78 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2021-11-13 18:10:40,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1531 transitions. [2021-11-13 18:10:40,662 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1531 transitions. Word has length 56 [2021-11-13 18:10:40,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:40,662 INFO L470 AbstractCegarLoop]: Abstraction has 1175 states and 1531 transitions. [2021-11-13 18:10:40,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:10:40,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1531 transitions. [2021-11-13 18:10:40,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 18:10:40,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:40,664 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:40,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:40,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:10:40,881 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:40,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:40,881 INFO L85 PathProgramCache]: Analyzing trace with hash 682405268, now seen corresponding path program 1 times [2021-11-13 18:10:40,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:10:40,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1252376871] [2021-11-13 18:10:40,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:40,882 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:10:40,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:10:40,883 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:10:40,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:10:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:41,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:10:41,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:41,443 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:10:41,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:41,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:10:41,613 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:41,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1252376871] [2021-11-13 18:10:41,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1252376871] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:41,613 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:41,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:10:41,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762540917] [2021-11-13 18:10:41,613 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:41,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:10:41,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:41,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:10:41,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:10:41,615 INFO L87 Difference]: Start difference. First operand 1175 states and 1531 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:10:41,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:41,691 INFO L93 Difference]: Finished difference Result 1177 states and 1532 transitions. [2021-11-13 18:10:41,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:10:41,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 57 [2021-11-13 18:10:41,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:41,700 INFO L225 Difference]: With dead ends: 1177 [2021-11-13 18:10:41,700 INFO L226 Difference]: Without dead ends: 1174 [2021-11-13 18:10:41,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 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 18:10:41,702 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 244 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.77ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.54ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:41,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 284 Invalid, 1 Unknown, 0 Unchecked, 1.77ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 1.54ms Time] [2021-11-13 18:10:41,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-11-13 18:10:41,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1174. [2021-11-13 18:10:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 898 states have (on average 1.2661469933184855) internal successors, (1137), 911 states have internal predecessors, (1137), 197 states have call successors, (197), 79 states have call predecessors, (197), 78 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2021-11-13 18:10:41,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1529 transitions. [2021-11-13 18:10:41,816 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1529 transitions. Word has length 57 [2021-11-13 18:10:41,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:41,816 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 1529 transitions. [2021-11-13 18:10:41,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:10:41,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1529 transitions. [2021-11-13 18:10:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 18:10:41,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:41,818 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:41,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:42,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:10:42,032 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:42,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:42,032 INFO L85 PathProgramCache]: Analyzing trace with hash -320253880, now seen corresponding path program 1 times [2021-11-13 18:10:42,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:10:42,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1440636315] [2021-11-13 18:10:42,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:42,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:10:42,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:10:42,034 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:10:42,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:10:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:42,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:10:42,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:42,569 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:10:42,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 18:10:42,750 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:42,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1440636315] [2021-11-13 18:10:42,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1440636315] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:42,750 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:42,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:10:42,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750167411] [2021-11-13 18:10:42,751 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:42,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:10:42,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:42,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:10:42,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:10:42,752 INFO L87 Difference]: Start difference. First operand 1174 states and 1529 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:10:42,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:42,832 INFO L93 Difference]: Finished difference Result 1176 states and 1530 transitions. [2021-11-13 18:10:42,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:10:42,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 58 [2021-11-13 18:10:42,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:42,840 INFO L225 Difference]: With dead ends: 1176 [2021-11-13 18:10:42,840 INFO L226 Difference]: Without dead ends: 1165 [2021-11-13 18:10:42,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 113 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 18:10:42,841 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 241 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.49ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:42,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 1.49ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:10:42,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-11-13 18:10:42,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1165. [2021-11-13 18:10:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 890 states have (on average 1.2651685393258427) internal successors, (1126), 902 states have internal predecessors, (1126), 196 states have call successors, (196), 79 states have call predecessors, (196), 78 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2021-11-13 18:10:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 1517 transitions. [2021-11-13 18:10:42,935 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 1517 transitions. Word has length 58 [2021-11-13 18:10:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:42,935 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 1517 transitions. [2021-11-13 18:10:42,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:10:42,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 1517 transitions. [2021-11-13 18:10:42,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-13 18:10:42,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:42,941 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:42,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:43,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:10:43,157 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:43,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:43,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1089358151, now seen corresponding path program 1 times [2021-11-13 18:10:43,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:10:43,158 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388306091] [2021-11-13 18:10:43,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:43,159 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:10:43,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:10:43,160 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:10:43,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:10:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:43,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:10:43,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:10:43,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:10:44,332 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:44,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388306091] [2021-11-13 18:10:44,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388306091] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:44,332 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:44,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:10:44,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897775577] [2021-11-13 18:10:44,333 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:44,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:10:44,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:44,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:10:44,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:10:44,334 INFO L87 Difference]: Start difference. First operand 1165 states and 1517 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-13 18:10:44,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:44,488 INFO L93 Difference]: Finished difference Result 2405 states and 3145 transitions. [2021-11-13 18:10:44,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:10:44,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 152 [2021-11-13 18:10:44,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:44,497 INFO L225 Difference]: With dead ends: 2405 [2021-11-13 18:10:44,498 INFO L226 Difference]: Without dead ends: 1255 [2021-11-13 18:10:44,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 301 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 18:10:44,504 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 41 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.57ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69.57ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:44,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 547 Invalid, 12 Unknown, 0 Unchecked, 3.57ms Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 69.57ms Time] [2021-11-13 18:10:44,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-11-13 18:10:44,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1232. [2021-11-13 18:10:44,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 956 states have (on average 1.2751046025104602) internal successors, (1219), 968 states have internal predecessors, (1219), 196 states have call successors, (196), 80 states have call predecessors, (196), 79 states have return successors, (195), 195 states have call predecessors, (195), 195 states have call successors, (195) [2021-11-13 18:10:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1610 transitions. [2021-11-13 18:10:44,624 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1610 transitions. Word has length 152 [2021-11-13 18:10:44,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:44,624 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 1610 transitions. [2021-11-13 18:10:44,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 2 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-13 18:10:44,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1610 transitions. [2021-11-13 18:10:44,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-13 18:10:44,630 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:44,630 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:44,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:44,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:10:44,852 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:44,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:44,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1490878930, now seen corresponding path program 1 times [2021-11-13 18:10:44,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:10:44,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364927451] [2021-11-13 18:10:44,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:44,853 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:10:44,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:10:44,854 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:10:44,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:10:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:45,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:10:45,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:45,757 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-11-13 18:10:45,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:46,277 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 18:10:46,277 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:46,277 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364927451] [2021-11-13 18:10:46,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364927451] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:10:46,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:10:46,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-13 18:10:46,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571166968] [2021-11-13 18:10:46,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:46,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:10:46,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:46,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:10:46,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:10:46,279 INFO L87 Difference]: Start difference. First operand 1232 states and 1610 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:10:46,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:46,452 INFO L93 Difference]: Finished difference Result 2487 states and 3285 transitions. [2021-11-13 18:10:46,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:10:46,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) Word has length 161 [2021-11-13 18:10:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:46,464 INFO L225 Difference]: With dead ends: 2487 [2021-11-13 18:10:46,464 INFO L226 Difference]: Without dead ends: 1274 [2021-11-13 18:10:46,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:10:46,470 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 1 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.56ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.44ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:46,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1118 Invalid, 17 Unknown, 0 Unchecked, 7.56ms Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 41.44ms Time] [2021-11-13 18:10:46,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-11-13 18:10:46,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1256. [2021-11-13 18:10:46,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 974 states have (on average 1.2700205338809034) internal successors, (1237), 986 states have internal predecessors, (1237), 196 states have call successors, (196), 80 states have call predecessors, (196), 85 states have return successors, (225), 201 states have call predecessors, (225), 195 states have call successors, (225) [2021-11-13 18:10:46,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1658 transitions. [2021-11-13 18:10:46,578 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1658 transitions. Word has length 161 [2021-11-13 18:10:46,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:46,580 INFO L470 AbstractCegarLoop]: Abstraction has 1256 states and 1658 transitions. [2021-11-13 18:10:46,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:10:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1658 transitions. [2021-11-13 18:10:46,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-13 18:10:46,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:46,595 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:46,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:46,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:10:46,795 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:46,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:46,796 INFO L85 PathProgramCache]: Analyzing trace with hash 886339054, now seen corresponding path program 1 times [2021-11-13 18:10:46,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:10:46,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187472555] [2021-11-13 18:10:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:46,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:10:46,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:10:46,798 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:10:46,801 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:10:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:47,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:10:47,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-13 18:10:47,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:48,093 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-13 18:10:48,093 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:48,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187472555] [2021-11-13 18:10:48,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187472555] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:48,093 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:48,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 18:10:48,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283348472] [2021-11-13 18:10:48,094 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:48,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:10:48,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:48,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:10:48,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:10:48,096 INFO L87 Difference]: Start difference. First operand 1256 states and 1658 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 18:10:48,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:48,316 INFO L93 Difference]: Finished difference Result 3270 states and 4431 transitions. [2021-11-13 18:10:48,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:10:48,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 167 [2021-11-13 18:10:48,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:48,332 INFO L225 Difference]: With dead ends: 3270 [2021-11-13 18:10:48,333 INFO L226 Difference]: Without dead ends: 2033 [2021-11-13 18:10:48,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:10:48,338 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 332 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.86ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:48,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 1361 Invalid, 30 Unknown, 0 Unchecked, 4.86ms Time], IncrementalHoareTripleChecker [14 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 70.58ms Time] [2021-11-13 18:10:48,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2033 states. [2021-11-13 18:10:48,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2033 to 1274. [2021-11-13 18:10:48,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1274 states, 992 states have (on average 1.2651209677419355) internal successors, (1255), 1004 states have internal predecessors, (1255), 196 states have call successors, (196), 80 states have call predecessors, (196), 85 states have return successors, (225), 201 states have call predecessors, (225), 195 states have call successors, (225) [2021-11-13 18:10:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1274 states to 1274 states and 1676 transitions. [2021-11-13 18:10:48,495 INFO L78 Accepts]: Start accepts. Automaton has 1274 states and 1676 transitions. Word has length 167 [2021-11-13 18:10:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:48,496 INFO L470 AbstractCegarLoop]: Abstraction has 1274 states and 1676 transitions. [2021-11-13 18:10:48,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 18:10:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1274 states and 1676 transitions. [2021-11-13 18:10:48,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-13 18:10:48,502 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:48,503 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:48,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:48,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:10:48,726 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:48,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:48,727 INFO L85 PathProgramCache]: Analyzing trace with hash -18682827, now seen corresponding path program 1 times [2021-11-13 18:10:48,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:10:48,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347663066] [2021-11-13 18:10:48,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:48,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:10:48,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:10:48,729 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:10:48,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 18:10:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:49,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 18:10:49,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:49,870 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 18:10:49,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:51,022 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:10:51,022 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:51,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347663066] [2021-11-13 18:10:51,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347663066] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:10:51,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:10:51,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 18 [2021-11-13 18:10:51,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518861048] [2021-11-13 18:10:51,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:51,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:10:51,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:51,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:10:51,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:10:51,024 INFO L87 Difference]: Start difference. First operand 1274 states and 1676 transitions. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 8 states have internal predecessors, (110), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 4 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 18:10:52,469 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:10:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:52,662 INFO L93 Difference]: Finished difference Result 3291 states and 4445 transitions. [2021-11-13 18:10:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-13 18:10:52,663 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 8 states have internal predecessors, (110), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 4 states have call predecessors, (16), 2 states have call successors, (16) Word has length 169 [2021-11-13 18:10:52,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:52,680 INFO L225 Difference]: With dead ends: 3291 [2021-11-13 18:10:52,680 INFO L226 Difference]: Without dead ends: 2036 [2021-11-13 18:10:52,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-11-13 18:10:52,686 INFO L933 BasicCegarLoop]: 390 mSDtfsCounter, 203 mSDsluCounter, 2994 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1269.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 3384 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.24ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1322.28ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:52,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 3384 Invalid, 82 Unknown, 0 Unchecked, 10.24ms Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 1322.28ms Time] [2021-11-13 18:10:52,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-11-13 18:10:52,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1322. [2021-11-13 18:10:52,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1322 states, 1034 states have (on average 1.2543520309477756) internal successors, (1297), 1040 states have internal predecessors, (1297), 196 states have call successors, (196), 80 states have call predecessors, (196), 91 states have return successors, (237), 213 states have call predecessors, (237), 195 states have call successors, (237) [2021-11-13 18:10:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1730 transitions. [2021-11-13 18:10:52,868 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1730 transitions. Word has length 169 [2021-11-13 18:10:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:52,869 INFO L470 AbstractCegarLoop]: Abstraction has 1322 states and 1730 transitions. [2021-11-13 18:10:52,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 8 states have internal predecessors, (110), 2 states have call successors, (16), 2 states have call predecessors, (16), 4 states have return successors, (16), 4 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-13 18:10:52,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1730 transitions. [2021-11-13 18:10:52,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-13 18:10:52,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:52,875 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:52,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:53,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:10:53,099 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:53,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1318126695, now seen corresponding path program 2 times [2021-11-13 18:10:53,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:10:53,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159439021] [2021-11-13 18:10:53,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:10:53,101 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:10:53,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:10:53,102 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:10:53,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 18:10:53,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-13 18:10:53,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:10:53,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-13 18:10:53,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 18:10:53,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 18:10:54,332 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:54,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159439021] [2021-11-13 18:10:54,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159439021] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:54,332 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:54,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 7 [2021-11-13 18:10:54,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877917212] [2021-11-13 18:10:54,333 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:54,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:10:54,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:54,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:10:54,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:10:54,334 INFO L87 Difference]: Start difference. First operand 1322 states and 1730 transitions. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-13 18:10:55,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:55,675 INFO L93 Difference]: Finished difference Result 2689 states and 3654 transitions. [2021-11-13 18:10:55,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:10:55,676 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 175 [2021-11-13 18:10:55,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:55,690 INFO L225 Difference]: With dead ends: 2689 [2021-11-13 18:10:55,690 INFO L226 Difference]: Without dead ends: 2027 [2021-11-13 18:10:55,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:10:55,693 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 738 mSDsluCounter, 1392 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 846.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 764 SdHoareTripleChecker+Valid, 1814 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.80ms SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 948.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:55,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [764 Valid, 1814 Invalid, 159 Unknown, 0 Unchecked, 7.80ms Time], IncrementalHoareTripleChecker [107 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 948.99ms Time] [2021-11-13 18:10:55,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-11-13 18:10:55,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1331. [2021-11-13 18:10:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1331 states, 1043 states have (on average 1.25215723873442) internal successors, (1306), 1049 states have internal predecessors, (1306), 196 states have call successors, (196), 80 states have call predecessors, (196), 91 states have return successors, (237), 213 states have call predecessors, (237), 195 states have call successors, (237) [2021-11-13 18:10:55,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1331 states to 1331 states and 1739 transitions. [2021-11-13 18:10:55,828 INFO L78 Accepts]: Start accepts. Automaton has 1331 states and 1739 transitions. Word has length 175 [2021-11-13 18:10:55,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:55,829 INFO L470 AbstractCegarLoop]: Abstraction has 1331 states and 1739 transitions. [2021-11-13 18:10:55,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-13 18:10:55,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1331 states and 1739 transitions. [2021-11-13 18:10:55,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-13 18:10:55,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:55,837 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:55,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:10:56,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:10:56,051 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:56,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:56,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1151185806, now seen corresponding path program 1 times [2021-11-13 18:10:56,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:10:56,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583784182] [2021-11-13 18:10:56,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:56,053 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:10:56,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:10:56,054 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:10:56,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 18:10:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:57,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 18:10:57,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 7 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 18:10:57,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:10:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-13 18:10:58,704 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:10:58,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583784182] [2021-11-13 18:10:58,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [583784182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:10:58,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:10:58,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-13 18:10:58,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101657946] [2021-11-13 18:10:58,705 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:10:58,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:10:58,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:10:58,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:10:58,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:10:58,709 INFO L87 Difference]: Start difference. First operand 1331 states and 1739 transitions. Second operand has 16 states, 16 states have (on average 9.4375) internal successors, (151), 12 states have internal predecessors, (151), 4 states have call successors, (25), 2 states have call predecessors, (25), 6 states have return successors, (27), 8 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-13 18:11:00,597 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:11:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:00,857 INFO L93 Difference]: Finished difference Result 2952 states and 3901 transitions. [2021-11-13 18:11:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:11:00,859 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.4375) internal successors, (151), 12 states have internal predecessors, (151), 4 states have call successors, (25), 2 states have call predecessors, (25), 6 states have return successors, (27), 8 states have call predecessors, (27), 4 states have call successors, (27) Word has length 206 [2021-11-13 18:11:00,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:00,870 INFO L225 Difference]: With dead ends: 2952 [2021-11-13 18:11:00,871 INFO L226 Difference]: Without dead ends: 1640 [2021-11-13 18:11:00,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:11:00,875 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 120 mSDsluCounter, 3624 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1844.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 3961 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.54ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1909.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:00,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 3961 Invalid, 87 Unknown, 0 Unchecked, 11.54ms Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 1909.03ms Time] [2021-11-13 18:11:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-11-13 18:11:01,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1343. [2021-11-13 18:11:01,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1343 states, 1049 states have (on average 1.2507149666348905) internal successors, (1312), 1055 states have internal predecessors, (1312), 202 states have call successors, (202), 80 states have call predecessors, (202), 91 states have return successors, (249), 219 states have call predecessors, (249), 201 states have call successors, (249) [2021-11-13 18:11:01,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1763 transitions. [2021-11-13 18:11:01,019 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 1763 transitions. Word has length 206 [2021-11-13 18:11:01,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:01,020 INFO L470 AbstractCegarLoop]: Abstraction has 1343 states and 1763 transitions. [2021-11-13 18:11:01,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.4375) internal successors, (151), 12 states have internal predecessors, (151), 4 states have call successors, (25), 2 states have call predecessors, (25), 6 states have return successors, (27), 8 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-13 18:11:01,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 1763 transitions. [2021-11-13 18:11:01,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-13 18:11:01,027 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:01,028 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:01,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:01,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:01,236 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:01,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:01,236 INFO L85 PathProgramCache]: Analyzing trace with hash 498288242, now seen corresponding path program 2 times [2021-11-13 18:11:01,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:01,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519352843] [2021-11-13 18:11:01,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:11:01,237 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:01,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:01,238 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:01,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 18:11:02,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:11:02,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:11:02,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:11:02,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-11-13 18:11:03,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-13 18:11:03,972 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:03,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519352843] [2021-11-13 18:11:03,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519352843] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:11:03,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:11:03,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-13 18:11:03,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12894448] [2021-11-13 18:11:03,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:11:03,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:11:03,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:03,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:11:03,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:11:03,975 INFO L87 Difference]: Start difference. First operand 1343 states and 1763 transitions. Second operand has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 4 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-13 18:11:06,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:06,700 INFO L93 Difference]: Finished difference Result 7956 states and 10475 transitions. [2021-11-13 18:11:06,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:11:06,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 4 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 212 [2021-11-13 18:11:06,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:06,788 INFO L225 Difference]: With dead ends: 7956 [2021-11-13 18:11:06,788 INFO L226 Difference]: Without dead ends: 7948 [2021-11-13 18:11:06,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:11:06,791 INFO L933 BasicCegarLoop]: 696 mSDtfsCounter, 998 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1861.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.85ms SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2099.39ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:06,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [998 Valid, 2042 Invalid, 741 Unknown, 0 Unchecked, 13.85ms Time], IncrementalHoareTripleChecker [118 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 2099.39ms Time] [2021-11-13 18:11:06,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7948 states. [2021-11-13 18:11:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7948 to 7872. [2021-11-13 18:11:07,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7872 states, 6148 states have (on average 1.252765126870527) internal successors, (7702), 6196 states have internal predecessors, (7702), 1192 states have call successors, (1192), 460 states have call predecessors, (1192), 531 states have return successors, (1479), 1287 states have call predecessors, (1479), 1191 states have call successors, (1479) [2021-11-13 18:11:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7872 states to 7872 states and 10373 transitions. [2021-11-13 18:11:07,534 INFO L78 Accepts]: Start accepts. Automaton has 7872 states and 10373 transitions. Word has length 212 [2021-11-13 18:11:07,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:07,535 INFO L470 AbstractCegarLoop]: Abstraction has 7872 states and 10373 transitions. [2021-11-13 18:11:07,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.166666666666664) internal successors, (241), 6 states have internal predecessors, (241), 4 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-13 18:11:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 7872 states and 10373 transitions. [2021-11-13 18:11:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-13 18:11:07,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:07,560 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:07,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:07,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:07,776 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:07,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:07,776 INFO L85 PathProgramCache]: Analyzing trace with hash -512829008, now seen corresponding path program 1 times [2021-11-13 18:11:07,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:07,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773302514] [2021-11-13 18:11:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:07,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:07,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:07,778 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:07,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 18:11:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:08,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 18:11:08,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-13 18:11:09,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-11-13 18:11:09,690 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:09,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773302514] [2021-11-13 18:11:09,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773302514] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:11:09,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:11:09,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-13 18:11:09,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002603753] [2021-11-13 18:11:09,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:11:09,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-13 18:11:09,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:09,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-13 18:11:09,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:11:09,693 INFO L87 Difference]: Start difference. First operand 7872 states and 10373 transitions. Second operand has 11 states, 11 states have (on average 13.090909090909092) internal successors, (144), 9 states have internal predecessors, (144), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-13 18:11:10,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:10,736 INFO L93 Difference]: Finished difference Result 18938 states and 25506 transitions. [2021-11-13 18:11:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:11:10,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.090909090909092) internal successors, (144), 9 states have internal predecessors, (144), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) Word has length 212 [2021-11-13 18:11:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:10,795 INFO L225 Difference]: With dead ends: 18938 [2021-11-13 18:11:10,795 INFO L226 Difference]: Without dead ends: 11085 [2021-11-13 18:11:10,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:11:10,814 INFO L933 BasicCegarLoop]: 393 mSDtfsCounter, 187 mSDsluCounter, 2630 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 3023 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.91ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 170.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:10,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 3023 Invalid, 57 Unknown, 0 Unchecked, 5.91ms Time], IncrementalHoareTripleChecker [15 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 170.16ms Time] [2021-11-13 18:11:10,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11085 states. [2021-11-13 18:11:11,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11085 to 7980. [2021-11-13 18:11:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7980 states, 6256 states have (on average 1.2484015345268542) internal successors, (7810), 6268 states have internal predecessors, (7810), 1192 states have call successors, (1192), 460 states have call predecessors, (1192), 531 states have return successors, (1479), 1323 states have call predecessors, (1479), 1191 states have call successors, (1479) [2021-11-13 18:11:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7980 states to 7980 states and 10481 transitions. [2021-11-13 18:11:11,661 INFO L78 Accepts]: Start accepts. Automaton has 7980 states and 10481 transitions. Word has length 212 [2021-11-13 18:11:11,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:11,662 INFO L470 AbstractCegarLoop]: Abstraction has 7980 states and 10481 transitions. [2021-11-13 18:11:11,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.090909090909092) internal successors, (144), 9 states have internal predecessors, (144), 3 states have call successors, (24), 2 states have call predecessors, (24), 4 states have return successors, (24), 5 states have call predecessors, (24), 3 states have call successors, (24) [2021-11-13 18:11:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 7980 states and 10481 transitions. [2021-11-13 18:11:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-13 18:11:11,687 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:11,688 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:11,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:11,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:11,904 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:11,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:11,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1946076244, now seen corresponding path program 2 times [2021-11-13 18:11:11,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:11,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [421820665] [2021-11-13 18:11:11,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:11:11,905 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:11,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:11,906 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:11,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 18:11:12,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-13 18:11:12,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:11:12,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:11:12,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-13 18:11:12,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-13 18:11:13,037 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:13,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [421820665] [2021-11-13 18:11:13,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [421820665] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:13,038 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:13,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-13 18:11:13,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895664260] [2021-11-13 18:11:13,038 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:13,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:11:13,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:13,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:11:13,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:11:13,040 INFO L87 Difference]: Start difference. First operand 7980 states and 10481 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-13 18:11:14,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:14,194 INFO L93 Difference]: Finished difference Result 25243 states and 33340 transitions. [2021-11-13 18:11:14,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:11:14,195 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 218 [2021-11-13 18:11:14,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:14,261 INFO L225 Difference]: With dead ends: 25243 [2021-11-13 18:11:14,261 INFO L226 Difference]: Without dead ends: 17282 [2021-11-13 18:11:14,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 433 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 18:11:14,284 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 336 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.20ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:14,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 957 Invalid, 18 Unknown, 0 Unchecked, 3.20ms Time], IncrementalHoareTripleChecker [6 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 61.03ms Time] [2021-11-13 18:11:14,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17282 states. [2021-11-13 18:11:15,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17282 to 8016. [2021-11-13 18:11:15,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8016 states, 6292 states have (on average 1.2469802924348379) internal successors, (7846), 6316 states have internal predecessors, (7846), 1192 states have call successors, (1192), 460 states have call predecessors, (1192), 531 states have return successors, (1479), 1311 states have call predecessors, (1479), 1191 states have call successors, (1479) [2021-11-13 18:11:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8016 states to 8016 states and 10517 transitions. [2021-11-13 18:11:15,212 INFO L78 Accepts]: Start accepts. Automaton has 8016 states and 10517 transitions. Word has length 218 [2021-11-13 18:11:15,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:15,213 INFO L470 AbstractCegarLoop]: Abstraction has 8016 states and 10517 transitions. [2021-11-13 18:11:15,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-13 18:11:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 8016 states and 10517 transitions. [2021-11-13 18:11:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-13 18:11:15,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:15,234 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:15,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-13 18:11:15,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:15,448 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:15,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:15,448 INFO L85 PathProgramCache]: Analyzing trace with hash -61991976, now seen corresponding path program 1 times [2021-11-13 18:11:15,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:15,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821439043] [2021-11-13 18:11:15,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:15,449 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:15,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:15,450 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:15,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-13 18:11:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:16,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 952 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 18:11:16,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-13 18:11:16,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-13 18:11:17,230 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:17,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821439043] [2021-11-13 18:11:17,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821439043] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:11:17,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:11:17,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-13 18:11:17,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578888826] [2021-11-13 18:11:17,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:17,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:11:17,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:17,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:11:17,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:11:17,231 INFO L87 Difference]: Start difference. First operand 8016 states and 10517 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 18:11:18,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:18,510 INFO L93 Difference]: Finished difference Result 17690 states and 24174 transitions. [2021-11-13 18:11:18,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:11:18,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 225 [2021-11-13 18:11:18,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:18,563 INFO L225 Difference]: With dead ends: 17690 [2021-11-13 18:11:18,563 INFO L226 Difference]: Without dead ends: 13641 [2021-11-13 18:11:18,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:11:18,576 INFO L933 BasicCegarLoop]: 430 mSDtfsCounter, 303 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 104.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1874 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.01ms SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 135.64ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:18,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 1874 Invalid, 88 Unknown, 0 Unchecked, 4.01ms Time], IncrementalHoareTripleChecker [59 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 135.64ms Time] [2021-11-13 18:11:18,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13641 states. [2021-11-13 18:11:19,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13641 to 8124. [2021-11-13 18:11:19,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8124 states, 6400 states have (on average 1.2428125) internal successors, (7954), 6388 states have internal predecessors, (7954), 1192 states have call successors, (1192), 460 states have call predecessors, (1192), 531 states have return successors, (1479), 1347 states have call predecessors, (1479), 1191 states have call successors, (1479) [2021-11-13 18:11:19,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8124 states to 8124 states and 10625 transitions. [2021-11-13 18:11:19,345 INFO L78 Accepts]: Start accepts. Automaton has 8124 states and 10625 transitions. Word has length 225 [2021-11-13 18:11:19,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:19,346 INFO L470 AbstractCegarLoop]: Abstraction has 8124 states and 10625 transitions. [2021-11-13 18:11:19,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 5 states have internal predecessors, (134), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 18:11:19,347 INFO L276 IsEmpty]: Start isEmpty. Operand 8124 states and 10625 transitions. [2021-11-13 18:11:19,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-13 18:11:19,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:19,367 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:19,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:19,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:19,580 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:19,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:19,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1402819212, now seen corresponding path program 2 times [2021-11-13 18:11:19,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:19,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794062397] [2021-11-13 18:11:19,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:11:19,582 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:19,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:19,583 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:19,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-13 18:11:21,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-13 18:11:21,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:11:21,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:11:21,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:22,444 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-11-13 18:11:22,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-11-13 18:11:22,899 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:22,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794062397] [2021-11-13 18:11:22,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794062397] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:22,900 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:22,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 18:11:22,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160678833] [2021-11-13 18:11:22,900 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:22,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:11:22,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:22,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:11:22,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:11:22,902 INFO L87 Difference]: Start difference. First operand 8124 states and 10625 transitions. Second operand has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 4 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-13 18:11:24,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:24,237 INFO L93 Difference]: Finished difference Result 24842 states and 33750 transitions. [2021-11-13 18:11:24,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:11:24,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 4 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 231 [2021-11-13 18:11:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:24,323 INFO L225 Difference]: With dead ends: 24842 [2021-11-13 18:11:24,323 INFO L226 Difference]: Without dead ends: 16737 [2021-11-13 18:11:24,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:11:24,351 INFO L933 BasicCegarLoop]: 457 mSDtfsCounter, 436 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.19ms SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.97ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:24,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 1623 Invalid, 73 Unknown, 0 Unchecked, 3.19ms Time], IncrementalHoareTripleChecker [51 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 97.97ms Time] [2021-11-13 18:11:24,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16737 states. [2021-11-13 18:11:25,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16737 to 10158. [2021-11-13 18:11:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10158 states, 7966 states have (on average 1.2493095656540296) internal successors, (9952), 7918 states have internal predecessors, (9952), 1660 states have call successors, (1660), 460 states have call predecessors, (1660), 531 states have return successors, (2091), 1851 states have call predecessors, (2091), 1659 states have call successors, (2091) [2021-11-13 18:11:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10158 states to 10158 states and 13703 transitions. [2021-11-13 18:11:25,639 INFO L78 Accepts]: Start accepts. Automaton has 10158 states and 13703 transitions. Word has length 231 [2021-11-13 18:11:25,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:25,639 INFO L470 AbstractCegarLoop]: Abstraction has 10158 states and 13703 transitions. [2021-11-13 18:11:25,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.333333333333332) internal successors, (170), 6 states have internal predecessors, (170), 4 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2021-11-13 18:11:25,640 INFO L276 IsEmpty]: Start isEmpty. Operand 10158 states and 13703 transitions. [2021-11-13 18:11:25,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-13 18:11:25,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:25,670 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:25,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:25,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:25,884 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:25,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:25,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1755907594, now seen corresponding path program 1 times [2021-11-13 18:11:25,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:25,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862128200] [2021-11-13 18:11:25,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:25,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:25,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:25,889 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:25,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-13 18:11:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:26,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:11:27,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:27,414 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-13 18:11:27,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:11:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-13 18:11:27,945 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:11:27,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862128200] [2021-11-13 18:11:27,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862128200] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:27,946 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:27,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 18:11:27,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331521666] [2021-11-13 18:11:27,946 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:27,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:11:27,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:11:27,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:11:27,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:11:27,948 INFO L87 Difference]: Start difference. First operand 10158 states and 13703 transitions. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 6 states have internal predecessors, (141), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 18:11:28,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:28,711 INFO L93 Difference]: Finished difference Result 20369 states and 27459 transitions. [2021-11-13 18:11:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:11:28,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 6 states have internal predecessors, (141), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) Word has length 231 [2021-11-13 18:11:28,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:28,755 INFO L225 Difference]: With dead ends: 20369 [2021-11-13 18:11:28,755 INFO L226 Difference]: Without dead ends: 10158 [2021-11-13 18:11:28,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:11:28,783 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 0 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1941 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.81ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:28,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1941 Invalid, 17 Unknown, 0 Unchecked, 2.81ms Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 41.88ms Time] [2021-11-13 18:11:28,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10158 states. [2021-11-13 18:11:29,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10158 to 10158. [2021-11-13 18:11:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10158 states, 7966 states have (on average 1.2493095656540296) internal successors, (9952), 7918 states have internal predecessors, (9952), 1660 states have call successors, (1660), 460 states have call predecessors, (1660), 531 states have return successors, (2055), 1851 states have call predecessors, (2055), 1659 states have call successors, (2055) [2021-11-13 18:11:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10158 states to 10158 states and 13667 transitions. [2021-11-13 18:11:29,916 INFO L78 Accepts]: Start accepts. Automaton has 10158 states and 13667 transitions. Word has length 231 [2021-11-13 18:11:29,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:29,917 INFO L470 AbstractCegarLoop]: Abstraction has 10158 states and 13667 transitions. [2021-11-13 18:11:29,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 6 states have internal predecessors, (141), 2 states have call successors, (22), 2 states have call predecessors, (22), 4 states have return successors, (22), 4 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-13 18:11:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 10158 states and 13667 transitions. [2021-11-13 18:11:29,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-13 18:11:29,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:29,943 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:29,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-13 18:11:30,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:11:30,160 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:30,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:30,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2040231342, now seen corresponding path program 1 times [2021-11-13 18:11:30,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:11:30,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881536694] [2021-11-13 18:11:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:30,161 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:11:30,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:11:30,162 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:11:30,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_552290e3-e871-475a-9cda-67b6e59acc0b/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-13 18:11:32,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:32,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 982 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-13 18:11:32,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:11:32,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-13 18:11:32,866 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 7 treesize of output 6 [2021-11-13 18:11:33,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2021-11-13 18:11:35,905 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 19 treesize of output 18 [2021-11-13 18:11:35,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 15 [2021-11-13 18:11:36,193 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-13 18:11:36,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 45 [2021-11-13 18:11:36,234 INFO L354 Elim1Store]: treesize reduction 16, result has 23.8 percent of original size [2021-11-13 18:11:36,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44 [2021-11-13 18:11:37,167 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-13 18:11:37,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 51 [2021-11-13 18:11:43,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-13 18:13:16,605 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-13 18:13:16,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 72 [2021-11-13 18:13:25,931 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-13 18:13:25,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 69 [2021-11-13 18:13:28,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 14 [2021-11-13 18:14:58,439 INFO L354 Elim1Store]: treesize reduction 69, result has 34.9 percent of original size [2021-11-13 18:14:58,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 100 treesize of output 127 [2021-11-13 18:14:59,468 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-13 18:14:59,468 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 110 treesize of output 102 [2021-11-13 18:15:27,135 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-13 18:15:27,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 113 treesize of output 119 [2021-11-13 18:16:01,762 INFO L354 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2021-11-13 18:16:01,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 47 [2021-11-13 18:16:01,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-11-13 18:16:27,122 INFO L354 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2021-11-13 18:16:27,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 47 [2021-11-13 18:16:27,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-11-13 18:16:27,284 INFO L354 Elim1Store]: treesize reduction 84, result has 11.6 percent of original size [2021-11-13 18:16:27,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 60 [2021-11-13 18:16:27,324 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-13 18:16:27,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42