./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 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/bin/uautomizer-tBqnrhUYjU/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/bin/uautomizer-tBqnrhUYjU --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-9ad7fb2 [2021-11-02 23:13:24,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:13:24,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:13:24,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:13:24,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:13:24,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:13:24,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:13:24,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:13:24,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:13:24,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:13:24,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:13:24,782 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:13:24,783 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:13:24,784 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:13:24,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:13:24,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:13:24,789 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:13:24,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:13:24,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:13:24,795 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:13:24,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:13:24,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:13:24,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:13:24,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:13:24,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:13:24,817 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:13:24,817 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:13:24,819 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:13:24,819 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:13:24,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:13:24,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:13:24,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:13:24,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:13:24,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:13:24,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:13:24,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:13:24,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:13:24,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:13:24,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:13:24,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:13:24,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:13:24,832 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 23:13:24,860 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:13:24,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:13:24,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:13:24,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:13:24,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:13:24,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:13:24,863 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:13:24,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:13:24,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:13:24,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:13:24,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:13:24,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:13:24,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:13:24,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:13:24,866 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:13:24,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:13:24,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:13:24,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:13:24,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:13:24,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:13:24,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:13:24,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:13:24,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:13:24,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:13:24,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:13:24,868 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:13:24,869 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:13:24,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:13:24,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:13:24,869 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/bin/uautomizer-tBqnrhUYjU/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 818c635cf736ceef0cf6e46266c8f75f5ad55dd0b6a806d4c2f32c53e0369659 [2021-11-02 23:13:25,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:13:25,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:13:25,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:13:25,157 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:13:25,159 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:13:25,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--video--udlfb.ko-main.cil.out.i [2021-11-02 23:13:25,240 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/bin/uautomizer-tBqnrhUYjU/data/ce0d81326/7de932b36acd4263a03f526d52c5a288/FLAG2b8f39ea8 [2021-11-02 23:13:26,184 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:13:26,186 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--video--udlfb.ko-main.cil.out.i [2021-11-02 23:13:26,248 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/bin/uautomizer-tBqnrhUYjU/data/ce0d81326/7de932b36acd4263a03f526d52c5a288/FLAG2b8f39ea8 [2021-11-02 23:13:26,607 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/bin/uautomizer-tBqnrhUYjU/data/ce0d81326/7de932b36acd4263a03f526d52c5a288 [2021-11-02 23:13:26,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:13:26,612 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:13:26,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:13:26,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:13:26,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:13:26,622 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:13:26" (1/1) ... [2021-11-02 23:13:26,623 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36909a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:26, skipping insertion in model container [2021-11-02 23:13:26,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:13:26" (1/1) ... [2021-11-02 23:13:26,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:13:26,777 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:13:28,391 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--video--udlfb.ko-main.cil.out.i[199878,199891] [2021-11-02 23:13:28,553 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:13:28,595 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:13:28,940 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--video--udlfb.ko-main.cil.out.i[199878,199891] [2021-11-02 23:13:28,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:13:29,108 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:13:29,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:29 WrapperNode [2021-11-02 23:13:29,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:13:29,112 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:13:29,112 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:13:29,112 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:13:29,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:29" (1/1) ... [2021-11-02 23:13:29,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:29" (1/1) ... [2021-11-02 23:13:30,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:13:30,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:13:30,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:13:30,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:13:30,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:29" (1/1) ... [2021-11-02 23:13:30,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:29" (1/1) ... [2021-11-02 23:13:30,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:29" (1/1) ... [2021-11-02 23:13:30,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:29" (1/1) ... [2021-11-02 23:13:31,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:29" (1/1) ... [2021-11-02 23:13:31,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:29" (1/1) ... [2021-11-02 23:13:31,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:29" (1/1) ... [2021-11-02 23:13:31,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:13:31,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:13:31,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:13:31,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:13:31,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:29" (1/1) ... [2021-11-02 23:13:31,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:13:31,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:31,892 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:13:31,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0c23547-7c51-43fe-83c8-51241c996982/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:13:31,940 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-02 23:13:31,940 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-02 23:13:31,940 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-02 23:13:31,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-02 23:13:31,941 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_free_framebuffer_work [2021-11-02 23:13:31,941 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_free_framebuffer_work [2021-11-02 23:13:31,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:13:31,942 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-02 23:13:31,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 23:13:31,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 23:13:31,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 23:13:31,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-02 23:13:31,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-02 23:13:31,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 23:13:31,943 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_free_framebuffer [2021-11-02 23:13:31,943 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_free_framebuffer [2021-11-02 23:13:31,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 23:13:31,944 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_usb_disconnect [2021-11-02 23:13:31,944 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_usb_disconnect [2021-11-02 23:13:31,944 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-02 23:13:31,944 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-02 23:13:31,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 23:13:31,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 23:13:31,945 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 23:13:31,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-02 23:13:31,945 INFO L130 BoogieDeclarations]: Found specification of procedure dlfb_init_framebuffer_work [2021-11-02 23:13:31,945 INFO L138 BoogieDeclarations]: Found implementation of procedure dlfb_init_framebuffer_work [2021-11-02 23:13:31,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:13:31,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:13:31,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:14:15,149 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:14:15,149 INFO L299 CfgBuilder]: Removed 4380 assume(true) statements. [2021-11-02 23:14:15,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:14:15 BoogieIcfgContainer [2021-11-02 23:14:15,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:14:15,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:14:15,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:14:15,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:14:15,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:13:26" (1/3) ... [2021-11-02 23:14:15,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41860522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:14:15, skipping insertion in model container [2021-11-02 23:14:15,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:13:29" (2/3) ... [2021-11-02 23:14:15,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41860522 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:14:15, skipping insertion in model container [2021-11-02 23:14:15,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:14:15" (3/3) ... [2021-11-02 23:14:15,170 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--video--udlfb.ko-main.cil.out.i [2021-11-02 23:14:15,175 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:14:15,175 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-02 23:14:15,250 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:14:15,256 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 [2021-11-02 23:14:15,257 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-02 23:14:15,344 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) [2021-11-02 23:14:15,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 23:14:15,350 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:15,351 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:15,351 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)] === [2021-11-02 23:14:15,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:15,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1156347363, now seen corresponding path program 1 times [2021-11-02 23:14:15,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:15,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347280199] [2021-11-02 23:14:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:15,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:15,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:16,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:16,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347280199] [2021-11-02 23:14:16,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347280199] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:16,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:16,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:14:16,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065714813] [2021-11-02 23:14:16,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:14:16,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:16,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:14:16,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:14:16,049 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) [2021-11-02 23:14:18,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:18,692 INFO L93 Difference]: Finished difference Result 12236 states and 16114 transitions. [2021-11-02 23:14:18,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:14:18,694 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 [2021-11-02 23:14:18,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:18,942 INFO L225 Difference]: With dead ends: 12236 [2021-11-02 23:14:18,942 INFO L226 Difference]: Without dead ends: 7958 [2021-11-02 23:14:18,961 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 [2021-11-02 23:14:18,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2021-11-02 23:14:19,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7950. [2021-11-02 23:14:19,331 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) [2021-11-02 23:14:19,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7950 states to 7950 states and 10267 transitions. [2021-11-02 23:14:19,384 INFO L78 Accepts]: Start accepts. Automaton has 7950 states and 10267 transitions. Word has length 13 [2021-11-02 23:14:19,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:19,385 INFO L470 AbstractCegarLoop]: Abstraction has 7950 states and 10267 transitions. [2021-11-02 23:14:19,386 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) [2021-11-02 23:14:19,386 INFO L276 IsEmpty]: Start isEmpty. Operand 7950 states and 10267 transitions. [2021-11-02 23:14:19,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 23:14:19,396 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:19,397 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:19,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:14:19,398 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)] === [2021-11-02 23:14:19,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:19,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2098330218, now seen corresponding path program 1 times [2021-11-02 23:14:19,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:19,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902567852] [2021-11-02 23:14:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:19,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:19,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:19,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902567852] [2021-11-02 23:14:19,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902567852] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:19,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:19,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:14:19,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292197769] [2021-11-02 23:14:19,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:14:19,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:19,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:14:19,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:14:19,628 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) [2021-11-02 23:14:19,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:19,922 INFO L93 Difference]: Finished difference Result 7980 states and 10295 transitions. [2021-11-02 23:14:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:14:19,924 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 [2021-11-02 23:14:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:19,974 INFO L225 Difference]: With dead ends: 7980 [2021-11-02 23:14:19,974 INFO L226 Difference]: Without dead ends: 7965 [2021-11-02 23:14:19,979 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 [2021-11-02 23:14:19,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2021-11-02 23:14:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 7950. [2021-11-02 23:14:20,266 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) [2021-11-02 23:14:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7950 states to 7950 states and 10266 transitions. [2021-11-02 23:14:20,307 INFO L78 Accepts]: Start accepts. Automaton has 7950 states and 10266 transitions. Word has length 17 [2021-11-02 23:14:20,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:20,309 INFO L470 AbstractCegarLoop]: Abstraction has 7950 states and 10266 transitions. [2021-11-02 23:14:20,309 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) [2021-11-02 23:14:20,309 INFO L276 IsEmpty]: Start isEmpty. Operand 7950 states and 10266 transitions. [2021-11-02 23:14:20,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 23:14:20,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:20,318 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:20,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:14:20,319 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)] === [2021-11-02 23:14:20,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:20,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2098389800, now seen corresponding path program 1 times [2021-11-02 23:14:20,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:20,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352535079] [2021-11-02 23:14:20,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:20,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:20,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:20,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352535079] [2021-11-02 23:14:20,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352535079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:20,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:20,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:14:20,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408748967] [2021-11-02 23:14:20,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:14:20,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:20,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:14:20,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:14:20,509 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) [2021-11-02 23:14:22,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:22,923 INFO L93 Difference]: Finished difference Result 7950 states and 10266 transitions. [2021-11-02 23:14:22,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:14:22,924 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 [2021-11-02 23:14:22,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:22,971 INFO L225 Difference]: With dead ends: 7950 [2021-11-02 23:14:22,971 INFO L226 Difference]: Without dead ends: 7948 [2021-11-02 23:14:22,976 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 [2021-11-02 23:14:22,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7948 states. [2021-11-02 23:14:23,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7948 to 7948. [2021-11-02 23:14:23,461 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) [2021-11-02 23:14:23,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7948 states to 7948 states and 10264 transitions. [2021-11-02 23:14:23,502 INFO L78 Accepts]: Start accepts. Automaton has 7948 states and 10264 transitions. Word has length 17 [2021-11-02 23:14:23,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:23,502 INFO L470 AbstractCegarLoop]: Abstraction has 7948 states and 10264 transitions. [2021-11-02 23:14:23,503 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) [2021-11-02 23:14:23,503 INFO L276 IsEmpty]: Start isEmpty. Operand 7948 states and 10264 transitions. [2021-11-02 23:14:23,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:14:23,505 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:23,505 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:23,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:14:23,505 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)] === [2021-11-02 23:14:23,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:23,506 INFO L85 PathProgramCache]: Analyzing trace with hash 625585268, now seen corresponding path program 1 times [2021-11-02 23:14:23,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:23,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467639152] [2021-11-02 23:14:23,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:23,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:23,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:23,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467639152] [2021-11-02 23:14:23,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467639152] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:23,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:23,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:14:23,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879360412] [2021-11-02 23:14:23,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:14:23,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:23,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:14:23,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:14:23,704 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) [2021-11-02 23:14:26,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:26,215 INFO L93 Difference]: Finished difference Result 7948 states and 10264 transitions. [2021-11-02 23:14:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:14:26,216 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 [2021-11-02 23:14:26,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:26,264 INFO L225 Difference]: With dead ends: 7948 [2021-11-02 23:14:26,265 INFO L226 Difference]: Without dead ends: 7946 [2021-11-02 23:14:26,270 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 [2021-11-02 23:14:26,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7946 states. [2021-11-02 23:14:26,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7946 to 7946. [2021-11-02 23:14:26,651 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) [2021-11-02 23:14:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7946 states to 7946 states and 10262 transitions. [2021-11-02 23:14:26,679 INFO L78 Accepts]: Start accepts. Automaton has 7946 states and 10262 transitions. Word has length 18 [2021-11-02 23:14:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:26,680 INFO L470 AbstractCegarLoop]: Abstraction has 7946 states and 10262 transitions. [2021-11-02 23:14:26,680 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) [2021-11-02 23:14:26,680 INFO L276 IsEmpty]: Start isEmpty. Operand 7946 states and 10262 transitions. [2021-11-02 23:14:26,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:14:26,681 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:26,682 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:26,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:14:26,682 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)] === [2021-11-02 23:14:26,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:26,683 INFO L85 PathProgramCache]: Analyzing trace with hash -965263938, now seen corresponding path program 1 times [2021-11-02 23:14:26,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:26,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055780869] [2021-11-02 23:14:26,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:26,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:26,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:26,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:26,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055780869] [2021-11-02 23:14:26,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055780869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:26,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:26,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:14:26,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785983041] [2021-11-02 23:14:26,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:14:26,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:26,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:14:26,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:14:26,834 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) [2021-11-02 23:14:27,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:27,382 INFO L93 Difference]: Finished difference Result 22833 states and 29483 transitions. [2021-11-02 23:14:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:14:27,382 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 [2021-11-02 23:14:27,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:27,435 INFO L225 Difference]: With dead ends: 22833 [2021-11-02 23:14:27,435 INFO L226 Difference]: Without dead ends: 14890 [2021-11-02 23:14:27,456 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 [2021-11-02 23:14:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14890 states. [2021-11-02 23:14:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14890 to 14873. [2021-11-02 23:14:28,158 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) [2021-11-02 23:14:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14873 states to 14873 states and 19208 transitions. [2021-11-02 23:14:28,201 INFO L78 Accepts]: Start accepts. Automaton has 14873 states and 19208 transitions. Word has length 18 [2021-11-02 23:14:28,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:28,205 INFO L470 AbstractCegarLoop]: Abstraction has 14873 states and 19208 transitions. [2021-11-02 23:14:28,205 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) [2021-11-02 23:14:28,205 INFO L276 IsEmpty]: Start isEmpty. Operand 14873 states and 19208 transitions. [2021-11-02 23:14:28,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 23:14:28,207 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:28,207 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:28,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:14:28,207 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)] === [2021-11-02 23:14:28,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:28,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2081682254, now seen corresponding path program 1 times [2021-11-02 23:14:28,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:28,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50647221] [2021-11-02 23:14:28,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:28,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:28,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:28,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:28,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50647221] [2021-11-02 23:14:28,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50647221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:28,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:28,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:14:28,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984146174] [2021-11-02 23:14:28,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:14:28,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:28,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:14:28,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:14:28,385 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) [2021-11-02 23:14:31,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:31,751 INFO L93 Difference]: Finished difference Result 44577 states and 57810 transitions. [2021-11-02 23:14:31,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:14:31,752 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 [2021-11-02 23:14:31,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:31,849 INFO L225 Difference]: With dead ends: 44577 [2021-11-02 23:14:31,850 INFO L226 Difference]: Without dead ends: 29707 [2021-11-02 23:14:31,884 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 [2021-11-02 23:14:31,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29707 states. [2021-11-02 23:14:33,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29707 to 29699. [2021-11-02 23:14:33,088 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) [2021-11-02 23:14:33,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29699 states to 29699 states and 38474 transitions. [2021-11-02 23:14:33,176 INFO L78 Accepts]: Start accepts. Automaton has 29699 states and 38474 transitions. Word has length 19 [2021-11-02 23:14:33,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:33,176 INFO L470 AbstractCegarLoop]: Abstraction has 29699 states and 38474 transitions. [2021-11-02 23:14:33,176 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) [2021-11-02 23:14:33,177 INFO L276 IsEmpty]: Start isEmpty. Operand 29699 states and 38474 transitions. [2021-11-02 23:14:33,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:14:33,178 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:33,178 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] [2021-11-02 23:14:33,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 23:14:33,179 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)] === [2021-11-02 23:14:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:33,179 INFO L85 PathProgramCache]: Analyzing trace with hash -107629506, now seen corresponding path program 1 times [2021-11-02 23:14:33,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:33,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640831399] [2021-11-02 23:14:33,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:33,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:33,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:33,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640831399] [2021-11-02 23:14:33,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640831399] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:33,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:33,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:14:33,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244695265] [2021-11-02 23:14:33,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:14:33,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:33,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:14:33,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:14:33,359 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) [2021-11-02 23:14:36,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:36,380 INFO L93 Difference]: Finished difference Result 29699 states and 38474 transitions. [2021-11-02 23:14:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:14:36,381 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 [2021-11-02 23:14:36,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:36,476 INFO L225 Difference]: With dead ends: 29699 [2021-11-02 23:14:36,476 INFO L226 Difference]: Without dead ends: 29697 [2021-11-02 23:14:36,489 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 [2021-11-02 23:14:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29697 states. [2021-11-02 23:14:37,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29697 to 29697. [2021-11-02 23:14:37,906 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) [2021-11-02 23:14:37,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29697 states to 29697 states and 38472 transitions. [2021-11-02 23:14:37,988 INFO L78 Accepts]: Start accepts. Automaton has 29697 states and 38472 transitions. Word has length 20 [2021-11-02 23:14:37,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:37,989 INFO L470 AbstractCegarLoop]: Abstraction has 29697 states and 38472 transitions. [2021-11-02 23:14:37,989 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) [2021-11-02 23:14:37,989 INFO L276 IsEmpty]: Start isEmpty. Operand 29697 states and 38472 transitions. [2021-11-02 23:14:37,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 23:14:37,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:37,991 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] [2021-11-02 23:14:37,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 23:14:37,991 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)] === [2021-11-02 23:14:37,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:37,992 INFO L85 PathProgramCache]: Analyzing trace with hash 958463548, now seen corresponding path program 1 times [2021-11-02 23:14:37,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:37,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167392272] [2021-11-02 23:14:37,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:37,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:38,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:38,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167392272] [2021-11-02 23:14:38,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167392272] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:38,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:38,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:14:38,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882959110] [2021-11-02 23:14:38,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:14:38,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:38,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:14:38,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:14:38,132 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) [2021-11-02 23:14:40,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:40,946 INFO L93 Difference]: Finished difference Result 29697 states and 38472 transitions. [2021-11-02 23:14:41,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:14:41,067 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 [2021-11-02 23:14:41,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:41,234 INFO L225 Difference]: With dead ends: 29697 [2021-11-02 23:14:41,234 INFO L226 Difference]: Without dead ends: 29688 [2021-11-02 23:14:41,242 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 [2021-11-02 23:14:41,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29688 states. [2021-11-02 23:14:42,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29688 to 29688. [2021-11-02 23:14:42,541 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) [2021-11-02 23:14:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29688 states to 29688 states and 38459 transitions. [2021-11-02 23:14:42,615 INFO L78 Accepts]: Start accepts. Automaton has 29688 states and 38459 transitions. Word has length 21 [2021-11-02 23:14:42,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:42,617 INFO L470 AbstractCegarLoop]: Abstraction has 29688 states and 38459 transitions. [2021-11-02 23:14:42,617 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) [2021-11-02 23:14:42,617 INFO L276 IsEmpty]: Start isEmpty. Operand 29688 states and 38459 transitions. [2021-11-02 23:14:42,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:14:42,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:42,639 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] [2021-11-02 23:14:42,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 23:14:42,640 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)] === [2021-11-02 23:14:42,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:42,640 INFO L85 PathProgramCache]: Analyzing trace with hash 330126008, now seen corresponding path program 1 times [2021-11-02 23:14:42,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:42,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412687817] [2021-11-02 23:14:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:42,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:14:42,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:42,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412687817] [2021-11-02 23:14:42,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412687817] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:42,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:42,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:14:42,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917921319] [2021-11-02 23:14:42,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:14:42,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:42,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:14:42,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:14:42,807 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) [2021-11-02 23:14:46,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:46,487 INFO L93 Difference]: Finished difference Result 73269 states and 94936 transitions. [2021-11-02 23:14:46,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:14:46,488 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 [2021-11-02 23:14:46,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:46,604 INFO L225 Difference]: With dead ends: 73269 [2021-11-02 23:14:46,604 INFO L226 Difference]: Without dead ends: 43584 [2021-11-02 23:14:46,660 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 [2021-11-02 23:14:46,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43584 states. [2021-11-02 23:14:48,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43584 to 43572. [2021-11-02 23:14:48,564 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) [2021-11-02 23:14:48,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43572 states to 43572 states and 56451 transitions. [2021-11-02 23:14:48,704 INFO L78 Accepts]: Start accepts. Automaton has 43572 states and 56451 transitions. Word has length 41 [2021-11-02 23:14:48,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:48,705 INFO L470 AbstractCegarLoop]: Abstraction has 43572 states and 56451 transitions. [2021-11-02 23:14:48,705 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) [2021-11-02 23:14:48,706 INFO L276 IsEmpty]: Start isEmpty. Operand 43572 states and 56451 transitions. [2021-11-02 23:14:48,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:14:48,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:48,724 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] [2021-11-02 23:14:48,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 23:14:48,725 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)] === [2021-11-02 23:14:48,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:48,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1971159366, now seen corresponding path program 1 times [2021-11-02 23:14:48,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:48,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877110786] [2021-11-02 23:14:48,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:48,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 23:14:48,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:48,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877110786] [2021-11-02 23:14:48,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877110786] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:48,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:48,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:14:48,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039625433] [2021-11-02 23:14:48,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:14:48,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:48,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:14:48,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:14:48,912 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) [2021-11-02 23:14:53,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:53,561 INFO L93 Difference]: Finished difference Result 122969 states and 159335 transitions. [2021-11-02 23:14:53,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:14:53,562 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 [2021-11-02 23:14:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:53,804 INFO L225 Difference]: With dead ends: 122969 [2021-11-02 23:14:53,804 INFO L226 Difference]: Without dead ends: 79400 [2021-11-02 23:14:54,131 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 [2021-11-02 23:14:54,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79400 states. [2021-11-02 23:14:56,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79400 to 43584. [2021-11-02 23:14:56,895 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) [2021-11-02 23:14:57,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43584 states to 43584 states and 56463 transitions. [2021-11-02 23:14:57,005 INFO L78 Accepts]: Start accepts. Automaton has 43584 states and 56463 transitions. Word has length 53 [2021-11-02 23:14:57,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:57,008 INFO L470 AbstractCegarLoop]: Abstraction has 43584 states and 56463 transitions. [2021-11-02 23:14:57,008 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) [2021-11-02 23:14:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand 43584 states and 56463 transitions. [2021-11-02 23:14:57,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:14:57,025 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:57,025 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] [2021-11-02 23:14:57,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 23:14:57,028 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)] === [2021-11-02 23:14:57,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:57,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2028417668, now seen corresponding path program 1 times [2021-11-02 23:14:57,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:57,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842891194] [2021-11-02 23:14:57,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:57,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 23:14:57,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:57,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842891194] [2021-11-02 23:14:57,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842891194] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:14:57,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:14:57,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:14:57,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505868362] [2021-11-02 23:14:57,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:14:57,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:57,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:14:57,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:14:57,350 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) [2021-11-02 23:15:01,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:01,860 INFO L93 Difference]: Finished difference Result 119757 states and 155256 transitions. [2021-11-02 23:15:01,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:15:01,868 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 [2021-11-02 23:15:01,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:02,038 INFO L225 Difference]: With dead ends: 119757 [2021-11-02 23:15:02,038 INFO L226 Difference]: Without dead ends: 76176 [2021-11-02 23:15:02,104 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 [2021-11-02 23:15:02,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76176 states. [2021-11-02 23:15:04,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76176 to 41729. [2021-11-02 23:15:04,910 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) [2021-11-02 23:15:04,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41729 states to 41729 states and 54082 transitions. [2021-11-02 23:15:04,979 INFO L78 Accepts]: Start accepts. Automaton has 41729 states and 54082 transitions. Word has length 53 [2021-11-02 23:15:04,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:04,979 INFO L470 AbstractCegarLoop]: Abstraction has 41729 states and 54082 transitions. [2021-11-02 23:15:04,979 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) [2021-11-02 23:15:04,979 INFO L276 IsEmpty]: Start isEmpty. Operand 41729 states and 54082 transitions. [2021-11-02 23:15:04,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-02 23:15:04,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:04,997 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] [2021-11-02 23:15:04,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 23:15:04,998 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)] === [2021-11-02 23:15:04,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:04,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1507639419, now seen corresponding path program 1 times [2021-11-02 23:15:04,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:15:04,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393700981] [2021-11-02 23:15:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:04,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:15:05,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:15:05,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:15:05,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393700981] [2021-11-02 23:15:05,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393700981] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:15:05,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:15:05,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:15:05,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25346768] [2021-11-02 23:15:05,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:15:05,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:15:05,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:15:05,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:15:05,121 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) [2021-11-02 23:15:09,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:09,665 INFO L93 Difference]: Finished difference Result 123738 states and 160320 transitions. [2021-11-02 23:15:09,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:15:09,665 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 [2021-11-02 23:15:09,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:09,838 INFO L225 Difference]: With dead ends: 123738 [2021-11-02 23:15:09,838 INFO L226 Difference]: Without dead ends: 82012 [2021-11-02 23:15:09,919 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 [2021-11-02 23:15:10,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82012 states.