./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--video--udlfb.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--video--udlfb.ko-main.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 818c635cf736ceef0cf6e46266c8f75f5ad55dd0b6a806d4c2f32c53e0369659 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 14:32:54,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 14:32:54,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 14:32:55,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 14:32:55,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 14:32:55,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 14:32:55,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 14:32:55,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 14:32:55,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 14:32:55,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 14:32:55,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 14:32:55,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 14:32:55,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 14:32:55,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 14:32:55,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 14:32:55,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 14:32:55,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 14:32:55,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 14:32:55,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 14:32:55,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 14:32:55,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 14:32:55,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 14:32:55,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 14:32:55,050 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 14:32:55,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 14:32:55,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 14:32:55,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 14:32:55,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 14:32:55,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 14:32:55,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 14:32:55,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 14:32:55,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 14:32:55,058 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 14:32:55,059 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 14:32:55,060 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 14:32:55,060 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 14:32:55,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 14:32:55,061 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 14:32:55,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 14:32:55,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 14:32:55,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 14:32:55,064 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 14:32:55,087 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 14:32:55,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 14:32:55,087 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 14:32:55,088 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 14:32:55,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 14:32:55,088 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 14:32:55,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 14:32:55,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 14:32:55,089 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 14:32:55,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 14:32:55,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 14:32:55,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 14:32:55,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 14:32:55,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 14:32:55,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 14:32:55,091 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 14:32:55,091 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 14:32:55,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 14:32:55,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 14:32:55,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 14:32:55,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 14:32:55,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:32:55,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 14:32:55,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 14:32:55,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 14:32:55,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 14:32:55,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 14:32:55,092 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 14:32:55,092 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 14:32:55,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 14:32:55,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 14:32:55,093 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 818c635cf736ceef0cf6e46266c8f75f5ad55dd0b6a806d4c2f32c53e0369659 [2021-12-22 14:32:55,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 14:32:55,325 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 14:32:55,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 14:32:55,328 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 14:32:55,328 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 14:32:55,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--video--udlfb.ko-main.cil.out.i [2021-12-22 14:32:55,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e026def29/2a385fed6dbc4d888a9c7903042e41e8/FLAGa8d65b1cb [2021-12-22 14:32:56,021 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 14:32:56,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--video--udlfb.ko-main.cil.out.i [2021-12-22 14:32:56,052 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e026def29/2a385fed6dbc4d888a9c7903042e41e8/FLAGa8d65b1cb [2021-12-22 14:32:56,405 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e026def29/2a385fed6dbc4d888a9c7903042e41e8 [2021-12-22 14:32:56,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 14:32:56,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 14:32:56,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 14:32:56,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 14:32:56,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 14:32:56,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:32:56" (1/1) ... [2021-12-22 14:32:56,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a13ebcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:56, skipping insertion in model container [2021-12-22 14:32:56,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:32:56" (1/1) ... [2021-12-22 14:32:56,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 14:32:56,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 14:32:57,545 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--video--udlfb.ko-main.cil.out.i[199878,199891] [2021-12-22 14:32:57,668 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:32:57,684 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 14:32:57,916 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--video--udlfb.ko-main.cil.out.i[199878,199891] [2021-12-22 14:32:57,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:32:58,012 INFO L208 MainTranslator]: Completed translation [2021-12-22 14:32:58,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:58 WrapperNode [2021-12-22 14:32:58,015 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 14:32:58,016 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 14:32:58,016 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 14:32:58,016 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 14:32:58,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:58" (1/1) ... [2021-12-22 14:32:58,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:58" (1/1) ... [2021-12-22 14:32:58,238 INFO L137 Inliner]: procedures = 257, calls = 1499, calls flagged for inlining = 108, calls inlined = 98, statements flattened = 3721 [2021-12-22 14:32:58,238 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 14:32:58,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 14:32:58,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 14:32:58,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 14:32:58,246 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:58" (1/1) ... [2021-12-22 14:32:58,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:58" (1/1) ... [2021-12-22 14:32:58,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:58" (1/1) ... [2021-12-22 14:32:58,269 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:58" (1/1) ... [2021-12-22 14:32:58,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:58" (1/1) ... [2021-12-22 14:32:58,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:58" (1/1) ... [2021-12-22 14:32:58,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:58" (1/1) ... [2021-12-22 14:32:58,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 14:32:58,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 14:32:58,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 14:32:58,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 14:32:58,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:58" (1/1) ... [2021-12-22 14:32:58,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:32:58,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:32:58,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 14:32:58,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 14:32:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-12-22 14:32:58,607 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-12-22 14:32:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_ops_fillrect [2021-12-22 14:32:58,607 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_ops_fillrect [2021-12-22 14:32:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-12-22 14:32:58,607 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-12-22 14:32:58,608 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_submit_urb [2021-12-22 14:32:58,608 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_submit_urb [2021-12-22 14:32:58,608 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_urb_completion [2021-12-22 14:32:58,608 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_urb_completion [2021-12-22 14:32:58,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 14:32:58,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 14:32:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_ops_mmap [2021-12-22 14:32:58,609 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_ops_mmap [2021-12-22 14:32:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_free_framebuffer_work [2021-12-22 14:32:58,609 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_free_framebuffer_work [2021-12-22 14:32:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_vidreg_unlock [2021-12-22 14:32:58,609 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_vidreg_unlock [2021-12-22 14:32:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-22 14:32:58,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-22 14:32:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_ops_check_var [2021-12-22 14:32:58,610 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_ops_check_var [2021-12-22 14:32:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_is_valid_mode [2021-12-22 14:32:58,610 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_is_valid_mode [2021-12-22 14:32:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_set_register_lfsr16 [2021-12-22 14:32:58,610 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_set_register_lfsr16 [2021-12-22 14:32:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure fb_destroy_modelist [2021-12-22 14:32:58,610 INFO L138 BoogieDeclarations]: Found implementation of procedure fb_destroy_modelist [2021-12-22 14:32:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-12-22 14:32:58,611 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-12-22 14:32:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-12-22 14:32:58,611 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-12-22 14:32:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_ops_setcolreg [2021-12-22 14:32:58,611 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_ops_setcolreg [2021-12-22 14:32:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-22 14:32:58,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-22 14:32:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-12-22 14:32:58,612 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-12-22 14:32:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 14:32:58,612 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 14:32:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_ops_release [2021-12-22 14:32:58,612 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_ops_release [2021-12-22 14:32:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_get_urb [2021-12-22 14:32:58,613 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_get_urb [2021-12-22 14:32:58,613 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_set_video_mode [2021-12-22 14:32:58,613 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_set_video_mode [2021-12-22 14:32:58,613 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-12-22 14:32:58,613 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-12-22 14:32:58,614 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-22 14:32:58,614 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-22 14:32:58,614 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_ops_blank [2021-12-22 14:32:58,614 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_ops_blank [2021-12-22 14:32:58,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 14:32:58,615 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-12-22 14:32:58,615 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-12-22 14:32:58,615 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-22 14:32:58,616 INFO L130 BoogieDeclarations]: Found specification of procedure get_cycles [2021-12-22 14:32:58,616 INFO L138 BoogieDeclarations]: Found implementation of procedure get_cycles [2021-12-22 14:32:58,616 INFO L130 BoogieDeclarations]: Found specification of procedure up [2021-12-22 14:32:58,617 INFO L138 BoogieDeclarations]: Found implementation of procedure up [2021-12-22 14:32:58,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 14:32:58,617 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_ops_copyarea [2021-12-22 14:32:58,617 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_ops_copyarea [2021-12-22 14:32:58,617 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-22 14:32:58,617 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-22 14:32:58,617 INFO L130 BoogieDeclarations]: Found specification of procedure fb_add_videomode [2021-12-22 14:32:58,617 INFO L138 BoogieDeclarations]: Found implementation of procedure fb_add_videomode [2021-12-22 14:32:58,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 14:32:58,618 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_add [2021-12-22 14:32:58,618 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_add [2021-12-22 14:32:58,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 14:32:58,618 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-22 14:32:58,618 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-22 14:32:58,619 INFO L130 BoogieDeclarations]: Found specification of procedure fb_edid_to_monspecs [2021-12-22 14:32:58,619 INFO L138 BoogieDeclarations]: Found implementation of procedure fb_edid_to_monspecs [2021-12-22 14:32:58,619 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-12-22 14:32:58,619 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-12-22 14:32:58,619 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-22 14:32:58,619 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-22 14:32:58,619 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-22 14:32:58,619 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-22 14:32:58,619 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_setup_modes [2021-12-22 14:32:58,620 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_setup_modes [2021-12-22 14:32:58,620 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-12-22 14:32:58,620 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-12-22 14:32:58,620 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-12-22 14:32:58,620 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-12-22 14:32:58,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 14:32:58,620 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-22 14:32:58,621 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-22 14:32:58,621 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_vidreg_lock [2021-12-22 14:32:58,621 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_vidreg_lock [2021-12-22 14:32:58,621 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-12-22 14:32:58,621 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-12-22 14:32:58,621 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 14:32:58,622 INFO L130 BoogieDeclarations]: Found specification of procedure kref_get [2021-12-22 14:32:58,622 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_get [2021-12-22 14:32:58,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 14:32:58,622 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_ops_ioctl [2021-12-22 14:32:58,622 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_ops_ioctl [2021-12-22 14:32:58,623 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_free_framebuffer [2021-12-22 14:32:58,623 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_free_framebuffer [2021-12-22 14:32:58,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 14:32:58,623 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 14:32:58,623 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_var_color_format [2021-12-22 14:32:58,623 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_var_color_format [2021-12-22 14:32:58,623 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-22 14:32:58,624 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-22 14:32:58,624 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-22 14:32:58,624 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-22 14:32:58,624 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2021-12-22 14:32:58,624 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2021-12-22 14:32:58,624 INFO L130 BoogieDeclarations]: Found specification of procedure list_add_tail [2021-12-22 14:32:58,625 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add_tail [2021-12-22 14:32:58,625 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_handle_damage [2021-12-22 14:32:58,625 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_handle_damage [2021-12-22 14:32:58,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 14:32:58,625 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_render_hline [2021-12-22 14:32:58,626 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_render_hline [2021-12-22 14:32:58,627 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_usb_disconnect [2021-12-22 14:32:58,628 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_usb_disconnect [2021-12-22 14:32:58,628 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-12-22 14:32:58,628 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-12-22 14:32:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-22 14:32:58,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-22 14:32:58,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 14:32:58,630 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_blanking [2021-12-22 14:32:58,630 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_blanking [2021-12-22 14:32:58,634 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_set_register_16 [2021-12-22 14:32:58,634 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_set_register_16 [2021-12-22 14:32:58,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 14:32:58,634 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_ops_imageblit [2021-12-22 14:32:58,634 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_ops_imageblit [2021-12-22 14:32:58,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 14:32:58,635 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-12-22 14:32:58,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-12-22 14:32:58,635 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_ops_open [2021-12-22 14:32:58,635 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_ops_open [2021-12-22 14:32:58,635 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_set_register [2021-12-22 14:32:58,635 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_set_register [2021-12-22 14:32:58,635 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-12-22 14:32:58,635 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-12-22 14:32:58,635 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-12-22 14:32:58,636 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-12-22 14:32:58,636 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_fb_info [2021-12-22 14:32:58,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_fb_info [2021-12-22 14:32:58,636 INFO L130 BoogieDeclarations]: Found specification of procedure init_timer_key [2021-12-22 14:32:58,636 INFO L138 BoogieDeclarations]: Found implementation of procedure init_timer_key [2021-12-22 14:32:58,636 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_init_framebuffer_work [2021-12-22 14:32:58,636 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_init_framebuffer_work [2021-12-22 14:32:58,636 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-12-22 14:32:58,636 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-12-22 14:32:58,636 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-22 14:32:58,637 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-22 14:32:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_ops_set_par [2021-12-22 14:32:58,637 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_ops_set_par [2021-12-22 14:32:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_delayed_work [2021-12-22 14:32:58,637 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_delayed_work [2021-12-22 14:32:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 14:32:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-12-22 14:32:58,637 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-12-22 14:32:58,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 14:32:58,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 14:32:59,097 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 14:32:59,099 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 14:33:04,934 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 14:33:04,944 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 14:33:04,944 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 14:33:04,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:33:04 BoogieIcfgContainer [2021-12-22 14:33:04,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 14:33:04,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 14:33:04,949 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 14:33:04,951 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 14:33:04,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:32:56" (1/3) ... [2021-12-22 14:33:04,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ded65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:33:04, skipping insertion in model container [2021-12-22 14:33:04,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:32:58" (2/3) ... [2021-12-22 14:33:04,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ded65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:33:04, skipping insertion in model container [2021-12-22 14:33:04,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:33:04" (3/3) ... [2021-12-22 14:33:04,954 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--video--udlfb.ko-main.cil.out.i [2021-12-22 14:33:04,958 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 14:33:04,958 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 14:33:05,003 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 14:33:05,009 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 14:33:05,009 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 14:33:05,040 INFO L276 IsEmpty]: Start isEmpty. Operand has 1126 states, 812 states have (on average 1.3214285714285714) internal successors, (1073), 834 states have internal predecessors, (1073), 239 states have call successors, (239), 73 states have call predecessors, (239), 73 states have return successors, (239), 235 states have call predecessors, (239), 239 states have call successors, (239) [2021-12-22 14:33:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 14:33:05,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:33:05,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:33:05,047 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:33:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:33:05,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1863154009, now seen corresponding path program 1 times [2021-12-22 14:33:05,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:33:05,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956212141] [2021-12-22 14:33:05,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:33:05,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:33:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:05,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:33:05,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:33:05,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956212141] [2021-12-22 14:33:05,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956212141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:33:05,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:33:05,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 14:33:05,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830700836] [2021-12-22 14:33:05,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:33:05,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:33:05,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:33:05,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:33:05,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:33:05,434 INFO L87 Difference]: Start difference. First operand has 1126 states, 812 states have (on average 1.3214285714285714) internal successors, (1073), 834 states have internal predecessors, (1073), 239 states have call successors, (239), 73 states have call predecessors, (239), 73 states have return successors, (239), 235 states have call predecessors, (239), 239 states have call successors, (239) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:33:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:33:05,685 INFO L93 Difference]: Finished difference Result 3346 states and 4691 transitions. [2021-12-22 14:33:05,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:33:05,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-22 14:33:05,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:33:05,713 INFO L225 Difference]: With dead ends: 3346 [2021-12-22 14:33:05,713 INFO L226 Difference]: Without dead ends: 2213 [2021-12-22 14:33:05,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:33:05,726 INFO L933 BasicCegarLoop]: 1772 mSDtfsCounter, 1505 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 3297 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:33:05,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1505 Valid, 3297 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:33:05,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2213 states. [2021-12-22 14:33:05,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2213 to 2209. [2021-12-22 14:33:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 1593 states have (on average 1.3138731952291274) internal successors, (2093), 1627 states have internal predecessors, (2093), 471 states have call successors, (471), 145 states have call predecessors, (471), 144 states have return successors, (464), 456 states have call predecessors, (464), 464 states have call successors, (464) [2021-12-22 14:33:05,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 3028 transitions. [2021-12-22 14:33:05,881 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 3028 transitions. Word has length 16 [2021-12-22 14:33:05,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:33:05,882 INFO L470 AbstractCegarLoop]: Abstraction has 2209 states and 3028 transitions. [2021-12-22 14:33:05,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:33:05,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 3028 transitions. [2021-12-22 14:33:05,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 14:33:05,890 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:33:05,890 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:33:05,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 14:33:05,890 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:33:05,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:33:05,891 INFO L85 PathProgramCache]: Analyzing trace with hash 805705890, now seen corresponding path program 1 times [2021-12-22 14:33:05,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:33:05,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890714546] [2021-12-22 14:33:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:33:05,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:33:05,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:33:05,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:33:05,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890714546] [2021-12-22 14:33:05,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890714546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:33:05,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:33:05,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 14:33:05,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521047397] [2021-12-22 14:33:05,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:33:05,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:33:05,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:33:05,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:33:05,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:33:05,965 INFO L87 Difference]: Start difference. First operand 2209 states and 3028 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:33:06,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:33:06,029 INFO L93 Difference]: Finished difference Result 2235 states and 3060 transitions. [2021-12-22 14:33:06,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:33:06,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-22 14:33:06,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:33:06,039 INFO L225 Difference]: With dead ends: 2235 [2021-12-22 14:33:06,040 INFO L226 Difference]: Without dead ends: 2222 [2021-12-22 14:33:06,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:33:06,046 INFO L933 BasicCegarLoop]: 1545 mSDtfsCounter, 1525 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:33:06,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1525 Valid, 1561 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:33:06,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-12-22 14:33:06,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 2209. [2021-12-22 14:33:06,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2209 states, 1593 states have (on average 1.3132454488386691) internal successors, (2092), 1627 states have internal predecessors, (2092), 471 states have call successors, (471), 145 states have call predecessors, (471), 144 states have return successors, (464), 456 states have call predecessors, (464), 464 states have call successors, (464) [2021-12-22 14:33:06,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2209 states to 2209 states and 3027 transitions. [2021-12-22 14:33:06,116 INFO L78 Accepts]: Start accepts. Automaton has 2209 states and 3027 transitions. Word has length 19 [2021-12-22 14:33:06,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:33:06,116 INFO L470 AbstractCegarLoop]: Abstraction has 2209 states and 3027 transitions. [2021-12-22 14:33:06,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:33:06,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2209 states and 3027 transitions. [2021-12-22 14:33:06,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 14:33:06,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:33:06,119 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:33:06,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 14:33:06,120 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:33:06,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:33:06,120 INFO L85 PathProgramCache]: Analyzing trace with hash 862964192, now seen corresponding path program 1 times [2021-12-22 14:33:06,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:33:06,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805335517] [2021-12-22 14:33:06,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:33:06,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:33:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:06,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:33:06,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:33:06,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805335517] [2021-12-22 14:33:06,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805335517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:33:06,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:33:06,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 14:33:06,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975700834] [2021-12-22 14:33:06,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:33:06,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:33:06,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:33:06,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:33:06,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:33:06,206 INFO L87 Difference]: Start difference. First operand 2209 states and 3027 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:33:06,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:33:06,259 INFO L93 Difference]: Finished difference Result 2211 states and 3028 transitions. [2021-12-22 14:33:06,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:33:06,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-22 14:33:06,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:33:06,268 INFO L225 Difference]: With dead ends: 2211 [2021-12-22 14:33:06,268 INFO L226 Difference]: Without dead ends: 2208 [2021-12-22 14:33:06,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:33:06,270 INFO L933 BasicCegarLoop]: 1527 mSDtfsCounter, 1512 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:33:06,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1512 Valid, 1527 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:33:06,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-12-22 14:33:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2208. [2021-12-22 14:33:06,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 1593 states have (on average 1.3126177024482109) internal successors, (2091), 1626 states have internal predecessors, (2091), 470 states have call successors, (470), 145 states have call predecessors, (470), 144 states have return successors, (464), 456 states have call predecessors, (464), 464 states have call successors, (464) [2021-12-22 14:33:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 3025 transitions. [2021-12-22 14:33:06,349 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 3025 transitions. Word has length 19 [2021-12-22 14:33:06,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:33:06,349 INFO L470 AbstractCegarLoop]: Abstraction has 2208 states and 3025 transitions. [2021-12-22 14:33:06,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:33:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 3025 transitions. [2021-12-22 14:33:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 14:33:06,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:33:06,350 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] [2021-12-22 14:33:06,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 14:33:06,350 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:33:06,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:33:06,351 INFO L85 PathProgramCache]: Analyzing trace with hash 981610294, now seen corresponding path program 1 times [2021-12-22 14:33:06,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:33:06,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362214714] [2021-12-22 14:33:06,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:33:06,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:33:06,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:33:06,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:33:06,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362214714] [2021-12-22 14:33:06,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362214714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:33:06,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:33:06,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 14:33:06,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778978746] [2021-12-22 14:33:06,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:33:06,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:33:06,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:33:06,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:33:06,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:33:06,417 INFO L87 Difference]: Start difference. First operand 2208 states and 3025 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:33:06,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:33:06,471 INFO L93 Difference]: Finished difference Result 2210 states and 3026 transitions. [2021-12-22 14:33:06,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:33:06,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-12-22 14:33:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:33:06,480 INFO L225 Difference]: With dead ends: 2210 [2021-12-22 14:33:06,480 INFO L226 Difference]: Without dead ends: 2207 [2021-12-22 14:33:06,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:33:06,482 INFO L933 BasicCegarLoop]: 1525 mSDtfsCounter, 1509 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1509 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:33:06,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1509 Valid, 1525 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:33:06,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-12-22 14:33:06,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2207. [2021-12-22 14:33:06,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2207 states, 1593 states have (on average 1.3119899560577526) internal successors, (2090), 1625 states have internal predecessors, (2090), 469 states have call successors, (469), 145 states have call predecessors, (469), 144 states have return successors, (464), 456 states have call predecessors, (464), 464 states have call successors, (464) [2021-12-22 14:33:06,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2207 states to 2207 states and 3023 transitions. [2021-12-22 14:33:06,538 INFO L78 Accepts]: Start accepts. Automaton has 2207 states and 3023 transitions. Word has length 20 [2021-12-22 14:33:06,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:33:06,538 INFO L470 AbstractCegarLoop]: Abstraction has 2207 states and 3023 transitions. [2021-12-22 14:33:06,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:33:06,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2207 states and 3023 transitions. [2021-12-22 14:33:06,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 14:33:06,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:33:06,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:33:06,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 14:33:06,539 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:33:06,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:33:06,540 INFO L85 PathProgramCache]: Analyzing trace with hash 364677027, now seen corresponding path program 1 times [2021-12-22 14:33:06,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:33:06,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229616917] [2021-12-22 14:33:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:33:06,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:33:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:33:06,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:33:06,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229616917] [2021-12-22 14:33:06,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229616917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:33:06,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:33:06,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 14:33:06,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952558503] [2021-12-22 14:33:06,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:33:06,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:33:06,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:33:06,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:33:06,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:33:06,603 INFO L87 Difference]: Start difference. First operand 2207 states and 3023 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:33:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:33:06,743 INFO L93 Difference]: Finished difference Result 6579 states and 9160 transitions. [2021-12-22 14:33:06,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:33:06,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-22 14:33:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:33:06,760 INFO L225 Difference]: With dead ends: 6579 [2021-12-22 14:33:06,761 INFO L226 Difference]: Without dead ends: 4375 [2021-12-22 14:33:06,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:33:06,769 INFO L933 BasicCegarLoop]: 2074 mSDtfsCounter, 1512 mSDsluCounter, 1520 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 3594 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:33:06,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1512 Valid, 3594 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:33:06,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4375 states. [2021-12-22 14:33:06,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4375 to 4369. [2021-12-22 14:33:06,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4369 states, 3158 states have (on average 1.3128562381253959) internal successors, (4146), 3218 states have internal predecessors, (4146), 928 states have call successors, (928), 284 states have call predecessors, (928), 282 states have return successors, (990), 906 states have call predecessors, (990), 922 states have call successors, (990) [2021-12-22 14:33:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4369 states to 4369 states and 6064 transitions. [2021-12-22 14:33:06,922 INFO L78 Accepts]: Start accepts. Automaton has 4369 states and 6064 transitions. Word has length 21 [2021-12-22 14:33:06,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:33:06,922 INFO L470 AbstractCegarLoop]: Abstraction has 4369 states and 6064 transitions. [2021-12-22 14:33:06,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:33:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 4369 states and 6064 transitions. [2021-12-22 14:33:06,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 14:33:06,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:33:06,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:33:06,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 14:33:06,924 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:33:06,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:33:06,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1580380199, now seen corresponding path program 1 times [2021-12-22 14:33:06,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:33:06,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148715633] [2021-12-22 14:33:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:33:06,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:33:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:33:07,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:33:07,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148715633] [2021-12-22 14:33:07,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148715633] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:33:07,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:33:07,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 14:33:07,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531834374] [2021-12-22 14:33:07,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:33:07,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:33:07,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:33:07,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:33:07,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:33:07,021 INFO L87 Difference]: Start difference. First operand 4369 states and 6064 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:33:07,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:33:07,102 INFO L93 Difference]: Finished difference Result 4371 states and 6065 transitions. [2021-12-22 14:33:07,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:33:07,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-22 14:33:07,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:33:07,126 INFO L225 Difference]: With dead ends: 4371 [2021-12-22 14:33:07,126 INFO L226 Difference]: Without dead ends: 4368 [2021-12-22 14:33:07,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:33:07,133 INFO L933 BasicCegarLoop]: 1523 mSDtfsCounter, 1505 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1505 SdHoareTripleChecker+Valid, 1523 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:33:07,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1505 Valid, 1523 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:33:07,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4368 states. [2021-12-22 14:33:07,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4368 to 4368. [2021-12-22 14:33:07,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4368 states, 3158 states have (on average 1.312539582013933) internal successors, (4145), 3217 states have internal predecessors, (4145), 927 states have call successors, (927), 284 states have call predecessors, (927), 282 states have return successors, (990), 906 states have call predecessors, (990), 922 states have call successors, (990) [2021-12-22 14:33:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4368 states to 4368 states and 6062 transitions. [2021-12-22 14:33:07,321 INFO L78 Accepts]: Start accepts. Automaton has 4368 states and 6062 transitions. Word has length 22 [2021-12-22 14:33:07,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:33:07,322 INFO L470 AbstractCegarLoop]: Abstraction has 4368 states and 6062 transitions. [2021-12-22 14:33:07,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:33:07,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4368 states and 6062 transitions. [2021-12-22 14:33:07,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 14:33:07,323 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:33:07,323 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] [2021-12-22 14:33:07,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 14:33:07,324 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:33:07,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:33:07,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1747607194, now seen corresponding path program 1 times [2021-12-22 14:33:07,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:33:07,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645596394] [2021-12-22 14:33:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:33:07,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:33:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:33:07,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:33:07,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645596394] [2021-12-22 14:33:07,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645596394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:33:07,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:33:07,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 14:33:07,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353773160] [2021-12-22 14:33:07,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:33:07,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 14:33:07,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:33:07,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 14:33:07,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:33:07,378 INFO L87 Difference]: Start difference. First operand 4368 states and 6062 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:33:07,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:33:07,464 INFO L93 Difference]: Finished difference Result 4370 states and 6063 transitions. [2021-12-22 14:33:07,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 14:33:07,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-22 14:33:07,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:33:07,485 INFO L225 Difference]: With dead ends: 4370 [2021-12-22 14:33:07,485 INFO L226 Difference]: Without dead ends: 4358 [2021-12-22 14:33:07,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 14:33:07,489 INFO L933 BasicCegarLoop]: 1522 mSDtfsCounter, 1502 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:33:07,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1522 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 14:33:07,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2021-12-22 14:33:07,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 4358. [2021-12-22 14:33:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4358 states, 3149 states have (on average 1.3124801524293426) internal successors, (4133), 3207 states have internal predecessors, (4133), 926 states have call successors, (926), 284 states have call predecessors, (926), 282 states have return successors, (990), 906 states have call predecessors, (990), 922 states have call successors, (990) [2021-12-22 14:33:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4358 states to 4358 states and 6049 transitions. [2021-12-22 14:33:07,613 INFO L78 Accepts]: Start accepts. Automaton has 4358 states and 6049 transitions. Word has length 23 [2021-12-22 14:33:07,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:33:07,614 INFO L470 AbstractCegarLoop]: Abstraction has 4358 states and 6049 transitions. [2021-12-22 14:33:07,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 14:33:07,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4358 states and 6049 transitions. [2021-12-22 14:33:07,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-22 14:33:07,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:33:07,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:33:07,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 14:33:07,618 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:33:07,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:33:07,618 INFO L85 PathProgramCache]: Analyzing trace with hash 771988741, now seen corresponding path program 1 times [2021-12-22 14:33:07,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:33:07,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59533374] [2021-12-22 14:33:07,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:33:07,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:33:07,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:07,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-22 14:33:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:07,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:33:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:07,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:33:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:07,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:33:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:07,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 14:33:07,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:33:07,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59533374] [2021-12-22 14:33:07,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59533374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:33:07,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:33:07,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:33:07,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222086148] [2021-12-22 14:33:07,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:33:07,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:33:07,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:33:07,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:33:07,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:33:07,700 INFO L87 Difference]: Start difference. First operand 4358 states and 6049 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 14:33:09,906 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:33:13,548 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:33:15,598 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:33:16,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:33:16,459 INFO L93 Difference]: Finished difference Result 13542 states and 18891 transitions. [2021-12-22 14:33:16,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:33:16,460 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2021-12-22 14:33:16,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:33:16,496 INFO L225 Difference]: With dead ends: 13542 [2021-12-22 14:33:16,496 INFO L226 Difference]: Without dead ends: 9187 [2021-12-22 14:33:16,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:33:16,533 INFO L933 BasicCegarLoop]: 1864 mSDtfsCounter, 1923 mSDsluCounter, 2083 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 734 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2111 SdHoareTripleChecker+Valid, 3947 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 734 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-12-22 14:33:16,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2111 Valid, 3947 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [734 Valid, 865 Invalid, 3 Unknown, 0 Unchecked, 8.4s Time] [2021-12-22 14:33:16,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9187 states. [2021-12-22 14:33:16,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9187 to 8952. [2021-12-22 14:33:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8952 states, 6451 states have (on average 1.3001085103084793) internal successors, (8387), 6589 states have internal predecessors, (8387), 1868 states have call successors, (1868), 562 states have call predecessors, (1868), 632 states have return successors, (2228), 1888 states have call predecessors, (2228), 1864 states have call successors, (2228) [2021-12-22 14:33:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8952 states to 8952 states and 12483 transitions. [2021-12-22 14:33:16,804 INFO L78 Accepts]: Start accepts. Automaton has 8952 states and 12483 transitions. Word has length 49 [2021-12-22 14:33:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:33:16,804 INFO L470 AbstractCegarLoop]: Abstraction has 8952 states and 12483 transitions. [2021-12-22 14:33:16,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 14:33:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 8952 states and 12483 transitions. [2021-12-22 14:33:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-22 14:33:16,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:33:16,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:33:16,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 14:33:16,811 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:33:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:33:16,812 INFO L85 PathProgramCache]: Analyzing trace with hash 2059784186, now seen corresponding path program 1 times [2021-12-22 14:33:16,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:33:16,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240457459] [2021-12-22 14:33:16,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:33:16,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:33:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:16,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 14:33:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:16,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:33:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:16,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:33:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:16,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:33:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 14:33:16,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:33:16,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240457459] [2021-12-22 14:33:16,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240457459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:33:16,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:33:16,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:33:16,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58461928] [2021-12-22 14:33:16,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:33:16,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:33:16,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:33:16,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:33:16,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:33:16,963 INFO L87 Difference]: Start difference. First operand 8952 states and 12483 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 14:33:19,971 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:33:22,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:33:26,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:33:28,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:33:29,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:33:29,230 INFO L93 Difference]: Finished difference Result 22678 states and 31679 transitions. [2021-12-22 14:33:29,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:33:29,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 61 [2021-12-22 14:33:29,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:33:29,275 INFO L225 Difference]: With dead ends: 22678 [2021-12-22 14:33:29,275 INFO L226 Difference]: Without dead ends: 13729 [2021-12-22 14:33:29,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:33:29,303 INFO L933 BasicCegarLoop]: 2791 mSDtfsCounter, 1640 mSDsluCounter, 2564 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 558 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1830 SdHoareTripleChecker+Valid, 5355 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2021-12-22 14:33:29,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1830 Valid, 5355 Invalid, 1487 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [558 Valid, 925 Invalid, 4 Unknown, 0 Unchecked, 11.9s Time] [2021-12-22 14:33:29,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13729 states. [2021-12-22 14:33:29,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13729 to 13386. [2021-12-22 14:33:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13386 states, 9649 states have (on average 1.2993056275261685) internal successors, (12537), 9855 states have internal predecessors, (12537), 2790 states have call successors, (2790), 840 states have call predecessors, (2790), 946 states have return successors, (3326), 2822 states have call predecessors, (3326), 2786 states have call successors, (3326) [2021-12-22 14:33:29,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13386 states to 13386 states and 18653 transitions. [2021-12-22 14:33:29,752 INFO L78 Accepts]: Start accepts. Automaton has 13386 states and 18653 transitions. Word has length 61 [2021-12-22 14:33:29,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:33:29,753 INFO L470 AbstractCegarLoop]: Abstraction has 13386 states and 18653 transitions. [2021-12-22 14:33:29,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-22 14:33:29,753 INFO L276 IsEmpty]: Start isEmpty. Operand 13386 states and 18653 transitions. [2021-12-22 14:33:29,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-22 14:33:29,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:33:29,764 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:33:29,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 14:33:29,764 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:33:29,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:33:29,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1712225285, now seen corresponding path program 1 times [2021-12-22 14:33:29,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:33:29,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845622917] [2021-12-22 14:33:29,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:33:29,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:33:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:29,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 14:33:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:29,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:33:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:29,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-22 14:33:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:29,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:33:29,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 14:33:29,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:33:29,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845622917] [2021-12-22 14:33:29,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845622917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:33:29,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:33:29,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:33:29,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815053654] [2021-12-22 14:33:29,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:33:29,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:33:29,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:33:29,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:33:29,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:33:29,903 INFO L87 Difference]: Start difference. First operand 13386 states and 18653 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 14:33:32,082 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:33:35,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:33:36,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:33:36,334 INFO L93 Difference]: Finished difference Result 27220 states and 38458 transitions. [2021-12-22 14:33:36,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 14:33:36,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 73 [2021-12-22 14:33:36,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:33:36,382 INFO L225 Difference]: With dead ends: 27220 [2021-12-22 14:33:36,383 INFO L226 Difference]: Without dead ends: 13837 [2021-12-22 14:33:36,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:33:36,423 INFO L933 BasicCegarLoop]: 1436 mSDtfsCounter, 387 mSDsluCounter, 3119 mSDsCounter, 0 mSdLazyCounter, 965 mSolverCounterSat, 261 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 4555 SdHoareTripleChecker+Invalid, 1228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 965 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:33:36,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 4555 Invalid, 1228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 965 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2021-12-22 14:33:36,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13837 states. [2021-12-22 14:33:36,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13837 to 13422. [2021-12-22 14:33:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13422 states, 9685 states have (on average 1.2981930820856995) internal successors, (12573), 9891 states have internal predecessors, (12573), 2790 states have call successors, (2790), 840 states have call predecessors, (2790), 946 states have return successors, (3326), 2822 states have call predecessors, (3326), 2786 states have call successors, (3326) [2021-12-22 14:33:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13422 states to 13422 states and 18689 transitions. [2021-12-22 14:33:36,881 INFO L78 Accepts]: Start accepts. Automaton has 13422 states and 18689 transitions. Word has length 73 [2021-12-22 14:33:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:33:36,882 INFO L470 AbstractCegarLoop]: Abstraction has 13422 states and 18689 transitions. [2021-12-22 14:33:36,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 14:33:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 13422 states and 18689 transitions. [2021-12-22 14:33:36,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-22 14:33:36,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:33:36,892 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:33:36,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 14:33:36,893 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:33:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:33:36,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1032166915, now seen corresponding path program 1 times [2021-12-22 14:33:36,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:33:36,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247921900] [2021-12-22 14:33:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:33:36,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:33:36,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:37,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 14:33:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:37,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:33:37,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:37,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-22 14:33:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:37,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:33:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-22 14:33:37,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:33:37,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247921900] [2021-12-22 14:33:37,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247921900] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:33:37,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:33:37,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:33:37,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581887422] [2021-12-22 14:33:37,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:33:37,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:33:37,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:33:37,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:33:37,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:33:37,051 INFO L87 Difference]: Start difference. First operand 13422 states and 18689 transitions. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 14:33:39,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:33:41,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:33:45,507 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:33:46,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:33:46,001 INFO L93 Difference]: Finished difference Result 29981 states and 42643 transitions. [2021-12-22 14:33:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:33:46,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 73 [2021-12-22 14:33:46,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:33:46,110 INFO L225 Difference]: With dead ends: 29981 [2021-12-22 14:33:46,110 INFO L226 Difference]: Without dead ends: 16562 [2021-12-22 14:33:46,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:33:46,137 INFO L933 BasicCegarLoop]: 1758 mSDtfsCounter, 2003 mSDsluCounter, 2226 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 644 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2110 SdHoareTripleChecker+Valid, 3984 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 644 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-12-22 14:33:46,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2110 Valid, 3984 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [644 Valid, 769 Invalid, 3 Unknown, 0 Unchecked, 8.5s Time] [2021-12-22 14:33:46,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16562 states. [2021-12-22 14:33:46,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16562 to 13394. [2021-12-22 14:33:46,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13394 states, 9665 states have (on average 1.2971546818416968) internal successors, (12537), 9871 states have internal predecessors, (12537), 2782 states have call successors, (2782), 840 states have call predecessors, (2782), 946 states have return successors, (3314), 2814 states have call predecessors, (3314), 2778 states have call successors, (3314) [2021-12-22 14:33:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13394 states to 13394 states and 18633 transitions. [2021-12-22 14:33:46,664 INFO L78 Accepts]: Start accepts. Automaton has 13394 states and 18633 transitions. Word has length 73 [2021-12-22 14:33:46,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:33:46,665 INFO L470 AbstractCegarLoop]: Abstraction has 13394 states and 18633 transitions. [2021-12-22 14:33:46,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 4 states have internal predecessors, (51), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 14:33:46,665 INFO L276 IsEmpty]: Start isEmpty. Operand 13394 states and 18633 transitions. [2021-12-22 14:33:46,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-22 14:33:46,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:33:46,683 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 14:33:46,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 14:33:46,684 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:33:46,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:33:46,684 INFO L85 PathProgramCache]: Analyzing trace with hash 734894962, now seen corresponding path program 1 times [2021-12-22 14:33:46,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:33:46,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690701427] [2021-12-22 14:33:46,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:33:46,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:33:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:46,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 14:33:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:46,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 14:33:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:46,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-22 14:33:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:46,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 14:33:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:46,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-22 14:33:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:46,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 14:33:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:46,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-22 14:33:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:46,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 14:33:46,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:46,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 14:33:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:46,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:33:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:33:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 14:33:46,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:33:46,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690701427] [2021-12-22 14:33:46,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690701427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:33:46,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:33:46,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:33:46,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120900032] [2021-12-22 14:33:46,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:33:46,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:33:46,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:33:46,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:33:46,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:33:46,885 INFO L87 Difference]: Start difference. First operand 13394 states and 18633 transitions. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 3 states have internal predecessors, (74), 2 states have call successors, (18), 4 states have call predecessors, (18), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-22 14:33:49,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:33:53,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:33:57,365 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:33:59,401 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:34:01,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:34:03,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []