./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 173e3943 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 0.2.1-dev-173e394 [2021-11-06 13:53:54,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 13:53:54,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 13:53:54,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 13:53:54,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 13:53:54,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 13:53:54,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 13:53:54,322 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 13:53:54,323 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 13:53:54,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 13:53:54,326 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 13:53:54,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 13:53:54,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 13:53:54,333 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 13:53:54,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 13:53:54,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 13:53:54,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 13:53:54,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 13:53:54,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 13:53:54,339 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 13:53:54,340 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 13:53:54,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 13:53:54,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 13:53:54,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 13:53:54,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 13:53:54,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 13:53:54,346 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 13:53:54,346 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 13:53:54,347 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 13:53:54,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 13:53:54,348 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 13:53:54,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 13:53:54,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 13:53:54,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 13:53:54,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 13:53:54,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 13:53:54,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 13:53:54,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 13:53:54,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 13:53:54,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 13:53:54,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 13:53:54,357 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 13:53:54,392 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 13:53:54,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 13:53:54,393 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 13:53:54,393 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 13:53:54,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 13:53:54,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 13:53:54,395 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 13:53:54,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 13:53:54,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 13:53:54,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 13:53:54,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 13:53:54,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 13:53:54,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 13:53:54,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 13:53:54,397 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 13:53:54,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 13:53:54,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 13:53:54,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 13:53:54,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 13:53:54,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 13:53:54,398 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 13:53:54,398 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 13:53:54,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 13:53:54,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 13:53:54,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 13:53:54,399 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 13:53:54,399 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 13:53:54,400 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 13:53:54,400 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 13:53:54,400 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 818c635cf736ceef0cf6e46266c8f75f5ad55dd0b6a806d4c2f32c53e0369659 [2021-11-06 13:53:54,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 13:53:54,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 13:53:54,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 13:53:54,646 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 13:53:54,647 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 13:53:54,648 INFO L432 ainManager$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 [2021-11-06 13:53:54,728 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4f72a591/a37e8335527c4316b4d48b0a8d4b08e6/FLAGe7d8c0728 [2021-11-06 13:53:55,362 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 13:53:55,363 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 [2021-11-06 13:53:55,406 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4f72a591/a37e8335527c4316b4d48b0a8d4b08e6/FLAGe7d8c0728 [2021-11-06 13:53:55,734 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4f72a591/a37e8335527c4316b4d48b0a8d4b08e6 [2021-11-06 13:53:55,736 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 13:53:55,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 13:53:55,742 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 13:53:55,742 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 13:53:55,745 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 13:53:55,745 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 01:53:55" (1/1) ... [2021-11-06 13:53:55,747 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a4a651b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:53:55, skipping insertion in model container [2021-11-06 13:53:55,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 01:53:55" (1/1) ... [2021-11-06 13:53:55,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 13:53:55,851 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 13:53:56,940 WARN L228 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] [2021-11-06 13:53:57,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 13:53:57,042 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 13:53:57,333 WARN L228 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] [2021-11-06 13:53:57,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 13:53:57,451 INFO L208 MainTranslator]: Completed translation [2021-11-06 13:53:57,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:53:57 WrapperNode [2021-11-06 13:53:57,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 13:53:57,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 13:53:57,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 13:53:57,455 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 13:53:57,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:53:57" (1/1) ... [2021-11-06 13:53:57,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:53:57" (1/1) ... [2021-11-06 13:53:58,347 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 13:53:58,348 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 13:53:58,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 13:53:58,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 13:53:58,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:53:57" (1/1) ... [2021-11-06 13:53:58,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:53:57" (1/1) ... [2021-11-06 13:53:58,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:53:57" (1/1) ... [2021-11-06 13:53:58,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:53:57" (1/1) ... [2021-11-06 13:53:59,061 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:53:57" (1/1) ... [2021-11-06 13:53:59,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:53:57" (1/1) ... [2021-11-06 13:53:59,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:53:57" (1/1) ... [2021-11-06 13:53:59,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 13:53:59,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 13:53:59,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 13:53:59,452 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 13:53:59,453 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:53:57" (1/1) ... [2021-11-06 13:53:59,472 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 13:53:59,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 13:53:59,517 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) [2021-11-06 13:53:59,585 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 [2021-11-06 13:53:59,609 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-06 13:53:59,609 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-06 13:53:59,609 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 13:53:59,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 13:53:59,610 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_free_framebuffer_work [2021-11-06 13:53:59,610 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_free_framebuffer_work [2021-11-06 13:53:59,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 13:53:59,611 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-06 13:53:59,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 13:53:59,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 13:53:59,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 13:53:59,611 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 13:53:59,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 13:53:59,612 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 13:53:59,612 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_free_framebuffer [2021-11-06 13:53:59,612 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_free_framebuffer [2021-11-06 13:53:59,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 13:53:59,612 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_usb_disconnect [2021-11-06 13:53:59,612 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_usb_disconnect [2021-11-06 13:53:59,613 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-06 13:53:59,613 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-06 13:53:59,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 13:53:59,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 13:53:59,613 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-06 13:53:59,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-06 13:53:59,614 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_init_framebuffer_work [2021-11-06 13:53:59,614 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_init_framebuffer_work [2021-11-06 13:53:59,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 13:53:59,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 13:53:59,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 13:54:37,047 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 13:54:37,048 INFO L299 CfgBuilder]: Removed 4380 assume(true) statements. [2021-11-06 13:54:37,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 01:54:37 BoogieIcfgContainer [2021-11-06 13:54:37,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 13:54:37,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 13:54:37,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 13:54:37,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 13:54:37,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 01:53:55" (1/3) ... [2021-11-06 13:54:37,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a55ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 01:54:37, skipping insertion in model container [2021-11-06 13:54:37,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 01:53:57" (2/3) ... [2021-11-06 13:54:37,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38a55ebb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 01:54:37, skipping insertion in model container [2021-11-06 13:54:37,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 01:54:37" (3/3) ... [2021-11-06 13:54:37,075 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--video--udlfb.ko-main.cil.out.i [2021-11-06 13:54:37,079 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 13:54:37,080 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-06 13:54:37,142 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 13:54:37,149 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 13:54:37,149 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-06 13:54:37,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 4089 states, 4058 states have (on average 1.3173977328733366) internal successors, (5346), 4070 states have internal predecessors, (5346), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) [2021-11-06 13:54:37,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-06 13:54:37,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:54:37,218 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:54:37,219 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [dlfb_init_framebuffer_workErr0ASSERT_VIOLATIONERROR_FUNCTION, dlfb_init_framebuffer_workErr1ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 13:54:37,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:54:37,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1156347363, now seen corresponding path program 1 times [2021-11-06 13:54:37,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:54:37,376 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183088139] [2021-11-06 13:54:37,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:54:37,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:54:37,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:54:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:54:37,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:54:37,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183088139] [2021-11-06 13:54:37,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183088139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:54:37,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:54:37,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:54:37,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268700362] [2021-11-06 13:54:37,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:54:37,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:54:37,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:54:37,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:37,837 INFO L87 Difference]: Start difference. First operand has 4089 states, 4058 states have (on average 1.3173977328733366) internal successors, (5346), 4070 states have internal predecessors, (5346), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 12 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:54:40,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:54:40,413 INFO L93 Difference]: Finished difference Result 12236 states and 16114 transitions. [2021-11-06 13:54:40,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:54:40,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-06 13:54:40,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:54:40,464 INFO L225 Difference]: With dead ends: 12236 [2021-11-06 13:54:40,464 INFO L226 Difference]: Without dead ends: 7958 [2021-11-06 13:54:40,486 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:40,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2021-11-06 13:54:40,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7950. [2021-11-06 13:54:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7950 states, 7899 states have (on average 1.2926952778832763) internal successors, (10211), 7913 states have internal predecessors, (10211), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-06 13:54:40,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7950 states to 7950 states and 10267 transitions. [2021-11-06 13:54:40,792 INFO L78 Accepts]: Start accepts. Automaton has 7950 states and 10267 transitions. Word has length 13 [2021-11-06 13:54:40,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:54:40,794 INFO L470 AbstractCegarLoop]: Abstraction has 7950 states and 10267 transitions. [2021-11-06 13:54:40,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:54:40,794 INFO L276 IsEmpty]: Start isEmpty. Operand 7950 states and 10267 transitions. [2021-11-06 13:54:40,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-06 13:54:40,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:54:40,801 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:54:40,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 13:54:40,802 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [dlfb_init_framebuffer_workErr0ASSERT_VIOLATIONERROR_FUNCTION, dlfb_init_framebuffer_workErr1ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 13:54:40,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:54:40,804 INFO L85 PathProgramCache]: Analyzing trace with hash 2098330218, now seen corresponding path program 1 times [2021-11-06 13:54:40,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:54:40,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979918200] [2021-11-06 13:54:40,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:54:40,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:54:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:54:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:54:40,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:54:40,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979918200] [2021-11-06 13:54:40,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979918200] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:54:40,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:54:40,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:54:40,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302144435] [2021-11-06 13:54:40,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:54:40,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:54:40,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:54:40,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:40,972 INFO L87 Difference]: Start difference. First operand 7950 states and 10267 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:54:41,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:54:41,191 INFO L93 Difference]: Finished difference Result 7980 states and 10295 transitions. [2021-11-06 13:54:41,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:54:41,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-06 13:54:41,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:54:41,227 INFO L225 Difference]: With dead ends: 7980 [2021-11-06 13:54:41,227 INFO L226 Difference]: Without dead ends: 7965 [2021-11-06 13:54:41,233 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:41,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2021-11-06 13:54:41,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 7950. [2021-11-06 13:54:41,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7950 states, 7899 states have (on average 1.2925686795796936) internal successors, (10210), 7913 states have internal predecessors, (10210), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-06 13:54:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7950 states to 7950 states and 10266 transitions. [2021-11-06 13:54:41,483 INFO L78 Accepts]: Start accepts. Automaton has 7950 states and 10266 transitions. Word has length 17 [2021-11-06 13:54:41,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:54:41,483 INFO L470 AbstractCegarLoop]: Abstraction has 7950 states and 10266 transitions. [2021-11-06 13:54:41,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:54:41,484 INFO L276 IsEmpty]: Start isEmpty. Operand 7950 states and 10266 transitions. [2021-11-06 13:54:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-06 13:54:41,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:54:41,485 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:54:41,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 13:54:41,485 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [dlfb_init_framebuffer_workErr0ASSERT_VIOLATIONERROR_FUNCTION, dlfb_init_framebuffer_workErr1ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 13:54:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:54:41,486 INFO L85 PathProgramCache]: Analyzing trace with hash 2098389800, now seen corresponding path program 1 times [2021-11-06 13:54:41,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:54:41,486 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577277136] [2021-11-06 13:54:41,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:54:41,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:54:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:54:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:54:41,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:54:41,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577277136] [2021-11-06 13:54:41,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577277136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:54:41,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:54:41,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:54:41,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017496036] [2021-11-06 13:54:41,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:54:41,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:54:41,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:54:41,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:41,587 INFO L87 Difference]: Start difference. First operand 7950 states and 10266 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:54:43,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:54:43,653 INFO L93 Difference]: Finished difference Result 7950 states and 10266 transitions. [2021-11-06 13:54:43,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:54:43,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-06 13:54:43,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:54:43,687 INFO L225 Difference]: With dead ends: 7950 [2021-11-06 13:54:43,688 INFO L226 Difference]: Without dead ends: 7948 [2021-11-06 13:54:43,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:43,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7948 states. [2021-11-06 13:54:43,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7948 to 7948. [2021-11-06 13:54:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7948 states, 7898 states have (on average 1.2924791086350975) internal successors, (10208), 7911 states have internal predecessors, (10208), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-06 13:54:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7948 states to 7948 states and 10264 transitions. [2021-11-06 13:54:43,952 INFO L78 Accepts]: Start accepts. Automaton has 7948 states and 10264 transitions. Word has length 17 [2021-11-06 13:54:43,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:54:43,953 INFO L470 AbstractCegarLoop]: Abstraction has 7948 states and 10264 transitions. [2021-11-06 13:54:43,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:54:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 7948 states and 10264 transitions. [2021-11-06 13:54:43,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-06 13:54:43,955 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:54:43,955 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:54:43,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 13:54:43,955 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [dlfb_init_framebuffer_workErr0ASSERT_VIOLATIONERROR_FUNCTION, dlfb_init_framebuffer_workErr1ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 13:54:43,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:54:43,956 INFO L85 PathProgramCache]: Analyzing trace with hash 625585268, now seen corresponding path program 1 times [2021-11-06 13:54:43,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:54:43,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551176516] [2021-11-06 13:54:43,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:54:43,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:54:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:54:44,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:54:44,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:54:44,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551176516] [2021-11-06 13:54:44,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551176516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:54:44,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:54:44,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:54:44,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605904622] [2021-11-06 13:54:44,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:54:44,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:54:44,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:54:44,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:44,103 INFO L87 Difference]: Start difference. First operand 7948 states and 10264 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:54:45,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:54:45,466 INFO L93 Difference]: Finished difference Result 7948 states and 10264 transitions. [2021-11-06 13:54:45,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:54:45,467 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-06 13:54:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:54:45,508 INFO L225 Difference]: With dead ends: 7948 [2021-11-06 13:54:45,508 INFO L226 Difference]: Without dead ends: 7946 [2021-11-06 13:54:45,513 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:45,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7946 states. [2021-11-06 13:54:45,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7946 to 7946. [2021-11-06 13:54:45,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7946 states, 7897 states have (on average 1.2923895150056983) internal successors, (10206), 7909 states have internal predecessors, (10206), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2021-11-06 13:54:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7946 states to 7946 states and 10262 transitions. [2021-11-06 13:54:45,764 INFO L78 Accepts]: Start accepts. Automaton has 7946 states and 10262 transitions. Word has length 18 [2021-11-06 13:54:45,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:54:45,764 INFO L470 AbstractCegarLoop]: Abstraction has 7946 states and 10262 transitions. [2021-11-06 13:54:45,764 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:54:45,765 INFO L276 IsEmpty]: Start isEmpty. Operand 7946 states and 10262 transitions. [2021-11-06 13:54:45,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-06 13:54:45,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:54:45,766 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:54:45,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 13:54:45,766 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [dlfb_init_framebuffer_workErr0ASSERT_VIOLATIONERROR_FUNCTION, dlfb_init_framebuffer_workErr1ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 13:54:45,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:54:45,767 INFO L85 PathProgramCache]: Analyzing trace with hash -965263938, now seen corresponding path program 1 times [2021-11-06 13:54:45,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:54:45,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135065825] [2021-11-06 13:54:45,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:54:45,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:54:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:54:45,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:54:45,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:54:45,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135065825] [2021-11-06 13:54:45,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135065825] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:54:45,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:54:45,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:54:45,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766364377] [2021-11-06 13:54:45,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:54:45,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:54:45,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:54:45,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:45,871 INFO L87 Difference]: Start difference. First operand 7946 states and 10262 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:54:46,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:54:46,266 INFO L93 Difference]: Finished difference Result 22833 states and 29483 transitions. [2021-11-06 13:54:46,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:54:46,267 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-06 13:54:46,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:54:46,312 INFO L225 Difference]: With dead ends: 22833 [2021-11-06 13:54:46,313 INFO L226 Difference]: Without dead ends: 14890 [2021-11-06 13:54:46,338 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14890 states. [2021-11-06 13:54:46,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14890 to 14873. [2021-11-06 13:54:46,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14873 states, 14782 states have (on average 1.2918414287647138) internal successors, (19096), 14800 states have internal predecessors, (19096), 56 states have call successors, (56), 28 states have call predecessors, (56), 28 states have return successors, (56), 48 states have call predecessors, (56), 56 states have call successors, (56) [2021-11-06 13:54:46,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14873 states to 14873 states and 19208 transitions. [2021-11-06 13:54:46,787 INFO L78 Accepts]: Start accepts. Automaton has 14873 states and 19208 transitions. Word has length 18 [2021-11-06 13:54:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:54:46,790 INFO L470 AbstractCegarLoop]: Abstraction has 14873 states and 19208 transitions. [2021-11-06 13:54:46,790 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:54:46,790 INFO L276 IsEmpty]: Start isEmpty. Operand 14873 states and 19208 transitions. [2021-11-06 13:54:46,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-06 13:54:46,791 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:54:46,791 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:54:46,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 13:54:46,792 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [dlfb_init_framebuffer_workErr0ASSERT_VIOLATIONERROR_FUNCTION, dlfb_init_framebuffer_workErr1ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 13:54:46,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:54:46,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2081682254, now seen corresponding path program 1 times [2021-11-06 13:54:46,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:54:46,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629158933] [2021-11-06 13:54:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:54:46,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:54:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:54:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:54:47,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:54:47,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629158933] [2021-11-06 13:54:47,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629158933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:54:47,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:54:47,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:54:47,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272256597] [2021-11-06 13:54:47,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:54:47,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:54:47,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:54:47,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:47,037 INFO L87 Difference]: Start difference. First operand 14873 states and 19208 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:54:49,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:54:49,777 INFO L93 Difference]: Finished difference Result 44577 states and 57810 transitions. [2021-11-06 13:54:49,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:54:49,778 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-06 13:54:49,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:54:49,877 INFO L225 Difference]: With dead ends: 44577 [2021-11-06 13:54:49,877 INFO L226 Difference]: Without dead ends: 29707 [2021-11-06 13:54:49,924 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:49,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29707 states. [2021-11-06 13:54:50,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29707 to 29699. [2021-11-06 13:54:50,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29699 states, 29524 states have (on average 1.2917626337894594) internal successors, (38138), 29554 states have internal predecessors, (38138), 112 states have call successors, (112), 56 states have call predecessors, (112), 56 states have return successors, (224), 96 states have call predecessors, (224), 112 states have call successors, (224) [2021-11-06 13:54:50,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29699 states to 29699 states and 38474 transitions. [2021-11-06 13:54:50,947 INFO L78 Accepts]: Start accepts. Automaton has 29699 states and 38474 transitions. Word has length 19 [2021-11-06 13:54:50,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:54:50,948 INFO L470 AbstractCegarLoop]: Abstraction has 29699 states and 38474 transitions. [2021-11-06 13:54:50,948 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:54:50,948 INFO L276 IsEmpty]: Start isEmpty. Operand 29699 states and 38474 transitions. [2021-11-06 13:54:50,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-06 13:54:50,949 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:54:50,949 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:54:50,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-06 13:54:50,949 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [dlfb_init_framebuffer_workErr0ASSERT_VIOLATIONERROR_FUNCTION, dlfb_init_framebuffer_workErr1ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 13:54:50,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:54:50,950 INFO L85 PathProgramCache]: Analyzing trace with hash -107629506, now seen corresponding path program 1 times [2021-11-06 13:54:50,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:54:50,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142351184] [2021-11-06 13:54:50,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:54:50,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:54:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:54:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:54:51,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:54:51,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142351184] [2021-11-06 13:54:51,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142351184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:54:51,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:54:51,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:54:51,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425725518] [2021-11-06 13:54:51,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:54:51,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:54:51,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:54:51,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:51,042 INFO L87 Difference]: Start difference. First operand 29699 states and 38474 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:54:53,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:54:53,785 INFO L93 Difference]: Finished difference Result 29699 states and 38474 transitions. [2021-11-06 13:54:53,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:54:53,787 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-06 13:54:53,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:54:53,859 INFO L225 Difference]: With dead ends: 29699 [2021-11-06 13:54:53,859 INFO L226 Difference]: Without dead ends: 29697 [2021-11-06 13:54:53,870 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29697 states. [2021-11-06 13:54:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29697 to 29697. [2021-11-06 13:54:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29697 states, 29523 states have (on average 1.2917386444467025) internal successors, (38136), 29552 states have internal predecessors, (38136), 112 states have call successors, (112), 56 states have call predecessors, (112), 56 states have return successors, (224), 96 states have call predecessors, (224), 112 states have call successors, (224) [2021-11-06 13:54:54,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29697 states to 29697 states and 38472 transitions. [2021-11-06 13:54:54,892 INFO L78 Accepts]: Start accepts. Automaton has 29697 states and 38472 transitions. Word has length 20 [2021-11-06 13:54:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:54:54,892 INFO L470 AbstractCegarLoop]: Abstraction has 29697 states and 38472 transitions. [2021-11-06 13:54:54,892 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:54:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 29697 states and 38472 transitions. [2021-11-06 13:54:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-06 13:54:54,893 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:54:54,893 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:54:54,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-06 13:54:54,893 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION === [dlfb_init_framebuffer_workErr0ASSERT_VIOLATIONERROR_FUNCTION, dlfb_init_framebuffer_workErr1ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 13:54:54,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:54:54,894 INFO L85 PathProgramCache]: Analyzing trace with hash 958463548, now seen corresponding path program 1 times [2021-11-06 13:54:54,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:54:54,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711242593] [2021-11-06 13:54:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:54:54,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:54:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:54:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:54:54,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:54:54,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711242593] [2021-11-06 13:54:54,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711242593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:54:54,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:54:54,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:54:54,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197051684] [2021-11-06 13:54:54,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:54:54,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:54:54,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:54:54,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:54,987 INFO L87 Difference]: Start difference. First operand 29697 states and 38472 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:54:57,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:54:57,464 INFO L93 Difference]: Finished difference Result 29697 states and 38472 transitions. [2021-11-06 13:54:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:54:57,604 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-06 13:54:57,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:54:57,677 INFO L225 Difference]: With dead ends: 29697 [2021-11-06 13:54:57,678 INFO L226 Difference]: Without dead ends: 29688 [2021-11-06 13:54:57,699 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:57,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29688 states. [2021-11-06 13:54:58,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29688 to 29688. [2021-11-06 13:54:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29688 states, 29515 states have (on average 1.2916483144163984) internal successors, (38123), 29543 states have internal predecessors, (38123), 112 states have call successors, (112), 56 states have call predecessors, (112), 56 states have return successors, (224), 96 states have call predecessors, (224), 112 states have call successors, (224) [2021-11-06 13:54:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29688 states to 29688 states and 38459 transitions. [2021-11-06 13:54:58,669 INFO L78 Accepts]: Start accepts. Automaton has 29688 states and 38459 transitions. Word has length 21 [2021-11-06 13:54:58,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:54:58,671 INFO L470 AbstractCegarLoop]: Abstraction has 29688 states and 38459 transitions. [2021-11-06 13:54:58,671 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:54:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 29688 states and 38459 transitions. [2021-11-06 13:54:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-06 13:54:58,685 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:54:58,685 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:54:58,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-06 13:54:58,686 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [dlfb_init_framebuffer_workErr0ASSERT_VIOLATIONERROR_FUNCTION, dlfb_init_framebuffer_workErr1ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 13:54:58,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:54:58,686 INFO L85 PathProgramCache]: Analyzing trace with hash 330126008, now seen corresponding path program 1 times [2021-11-06 13:54:58,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:54:58,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817197519] [2021-11-06 13:54:58,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:54:58,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:54:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:54:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:54:58,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:54:58,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817197519] [2021-11-06 13:54:58,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817197519] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:54:58,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:54:58,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:54:58,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115296717] [2021-11-06 13:54:58,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:54:58,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:54:58,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:54:58,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:54:58,930 INFO L87 Difference]: Start difference. First operand 29688 states and 38459 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:55:02,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:55:02,239 INFO L93 Difference]: Finished difference Result 73269 states and 94936 transitions. [2021-11-06 13:55:02,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:55:02,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-06 13:55:02,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:55:02,338 INFO L225 Difference]: With dead ends: 73269 [2021-11-06 13:55:02,338 INFO L226 Difference]: Without dead ends: 43584 [2021-11-06 13:55:02,407 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:55:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43584 states. [2021-11-06 13:55:03,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43584 to 43572. [2021-11-06 13:55:03,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43572 states, 43315 states have (on average 1.2916310746854438) internal successors, (55947), 43355 states have internal predecessors, (55947), 168 states have call successors, (168), 84 states have call predecessors, (168), 84 states have return successors, (336), 144 states have call predecessors, (336), 168 states have call successors, (336) [2021-11-06 13:55:03,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43572 states to 43572 states and 56451 transitions. [2021-11-06 13:55:03,794 INFO L78 Accepts]: Start accepts. Automaton has 43572 states and 56451 transitions. Word has length 41 [2021-11-06 13:55:03,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:55:03,795 INFO L470 AbstractCegarLoop]: Abstraction has 43572 states and 56451 transitions. [2021-11-06 13:55:03,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:55:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 43572 states and 56451 transitions. [2021-11-06 13:55:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-06 13:55:03,808 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:55:03,808 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:55:03,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-06 13:55:03,809 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [dlfb_init_framebuffer_workErr0ASSERT_VIOLATIONERROR_FUNCTION, dlfb_init_framebuffer_workErr1ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 13:55:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:55:03,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1971159366, now seen corresponding path program 1 times [2021-11-06 13:55:03,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:55:03,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342085346] [2021-11-06 13:55:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:55:03,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:55:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:55:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 13:55:03,929 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:55:03,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342085346] [2021-11-06 13:55:03,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342085346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:55:03,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:55:03,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 13:55:03,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210638519] [2021-11-06 13:55:03,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 13:55:03,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:55:03,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 13:55:03,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 13:55:03,931 INFO L87 Difference]: Start difference. First operand 43572 states and 56451 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:55:06,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:55:06,533 INFO L93 Difference]: Finished difference Result 122969 states and 159335 transitions. [2021-11-06 13:55:06,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-06 13:55:06,534 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-06 13:55:06,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:55:06,696 INFO L225 Difference]: With dead ends: 122969 [2021-11-06 13:55:06,697 INFO L226 Difference]: Without dead ends: 79400 [2021-11-06 13:55:06,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 13:55:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79400 states. [2021-11-06 13:55:08,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79400 to 43584. [2021-11-06 13:55:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43584 states, 43327 states have (on average 1.291550303505897) internal successors, (55959), 43367 states have internal predecessors, (55959), 168 states have call successors, (168), 84 states have call predecessors, (168), 84 states have return successors, (336), 144 states have call predecessors, (336), 168 states have call successors, (336) [2021-11-06 13:55:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43584 states to 43584 states and 56463 transitions. [2021-11-06 13:55:08,642 INFO L78 Accepts]: Start accepts. Automaton has 43584 states and 56463 transitions. Word has length 53 [2021-11-06 13:55:08,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:55:08,642 INFO L470 AbstractCegarLoop]: Abstraction has 43584 states and 56463 transitions. [2021-11-06 13:55:08,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:55:08,642 INFO L276 IsEmpty]: Start isEmpty. Operand 43584 states and 56463 transitions. [2021-11-06 13:55:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-06 13:55:08,654 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:55:08,654 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:55:08,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-06 13:55:08,654 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [dlfb_init_framebuffer_workErr0ASSERT_VIOLATIONERROR_FUNCTION, dlfb_init_framebuffer_workErr1ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 13:55:08,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:55:08,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2028417668, now seen corresponding path program 1 times [2021-11-06 13:55:08,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:55:08,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109002224] [2021-11-06 13:55:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:55:08,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:55:08,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:55:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-06 13:55:08,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:55:08,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109002224] [2021-11-06 13:55:08,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109002224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:55:08,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:55:08,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:55:08,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106226970] [2021-11-06 13:55:08,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 13:55:08,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:55:08,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 13:55:08,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 13:55:08,850 INFO L87 Difference]: Start difference. First operand 43584 states and 56463 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:55:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:55:11,948 INFO L93 Difference]: Finished difference Result 119757 states and 155256 transitions. [2021-11-06 13:55:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 13:55:11,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-06 13:55:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:55:12,094 INFO L225 Difference]: With dead ends: 119757 [2021-11-06 13:55:12,094 INFO L226 Difference]: Without dead ends: 76176 [2021-11-06 13:55:12,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 13:55:12,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76176 states. [2021-11-06 13:55:14,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76176 to 41729. [2021-11-06 13:55:14,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41729 states, 41474 states have (on average 1.2918454935622317) internal successors, (53578), 41512 states have internal predecessors, (53578), 168 states have call successors, (168), 84 states have call predecessors, (168), 84 states have return successors, (336), 144 states have call predecessors, (336), 168 states have call successors, (336) [2021-11-06 13:55:14,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41729 states to 41729 states and 54082 transitions. [2021-11-06 13:55:14,192 INFO L78 Accepts]: Start accepts. Automaton has 41729 states and 54082 transitions. Word has length 53 [2021-11-06 13:55:14,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:55:14,193 INFO L470 AbstractCegarLoop]: Abstraction has 41729 states and 54082 transitions. [2021-11-06 13:55:14,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:55:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand 41729 states and 54082 transitions. [2021-11-06 13:55:14,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-06 13:55:14,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:55:14,205 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:55:14,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-06 13:55:14,206 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting dlfb_init_framebuffer_workErr1ASSERT_VIOLATIONERROR_FUNCTION === [dlfb_init_framebuffer_workErr0ASSERT_VIOLATIONERROR_FUNCTION, dlfb_init_framebuffer_workErr1ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 13:55:14,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:55:14,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1507639419, now seen corresponding path program 1 times [2021-11-06 13:55:14,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:55:14,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443721621] [2021-11-06 13:55:14,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:55:14,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:55:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:55:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:55:14,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:55:14,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443721621] [2021-11-06 13:55:14,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443721621] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:55:14,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:55:14,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:55:14,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39217179] [2021-11-06 13:55:14,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:55:14,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:55:14,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:55:14,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:55:14,289 INFO L87 Difference]: Start difference. First operand 41729 states and 54082 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (4), 1 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:55:17,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 13:55:17,422 INFO L93 Difference]: Finished difference Result 123738 states and 160320 transitions. [2021-11-06 13:55:17,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 13:55:17,423 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (4), 1 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-06 13:55:17,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 13:55:17,574 INFO L225 Difference]: With dead ends: 123738 [2021-11-06 13:55:17,574 INFO L226 Difference]: Without dead ends: 82012 [2021-11-06 13:55:17,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:55:17,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82012 states. [2021-11-06 13:55:20,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82012 to 81989. [2021-11-06 13:55:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81989 states, 81518 states have (on average 1.2918496528374102) internal successors, (105309), 81592 states have internal predecessors, (105309), 300 states have call successors, (300), 168 states have call predecessors, (300), 168 states have return successors, (600), 252 states have call predecessors, (600), 300 states have call successors, (600) [2021-11-06 13:55:21,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81989 states to 81989 states and 106209 transitions. [2021-11-06 13:55:21,011 INFO L78 Accepts]: Start accepts. Automaton has 81989 states and 106209 transitions. Word has length 60 [2021-11-06 13:55:21,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 13:55:21,012 INFO L470 AbstractCegarLoop]: Abstraction has 81989 states and 106209 transitions. [2021-11-06 13:55:21,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (4), 1 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 13:55:21,012 INFO L276 IsEmpty]: Start isEmpty. Operand 81989 states and 106209 transitions. [2021-11-06 13:55:21,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-06 13:55:21,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 13:55:21,044 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 13:55:21,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-06 13:55:21,045 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting dlfb_init_framebuffer_workErr1ASSERT_VIOLATIONERROR_FUNCTION === [dlfb_init_framebuffer_workErr0ASSERT_VIOLATIONERROR_FUNCTION, dlfb_init_framebuffer_workErr1ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2021-11-06 13:55:21,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 13:55:21,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1494590329, now seen corresponding path program 1 times [2021-11-06 13:55:21,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 13:55:21,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220961480] [2021-11-06 13:55:21,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 13:55:21,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 13:55:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 13:55:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 13:55:21,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 13:55:21,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220961480] [2021-11-06 13:55:21,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220961480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 13:55:21,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 13:55:21,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 13:55:21,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527104757] [2021-11-06 13:55:21,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 13:55:21,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 13:55:21,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 13:55:21,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 13:55:21,150 INFO L87 Difference]: Start difference. First operand 81989 states and 106209 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (4), 1 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)