./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4d014703 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-4d01470 [2021-11-02 16:08:46,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 16:08:46,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 16:08:46,333 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 16:08:46,334 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 16:08:46,335 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 16:08:46,336 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 16:08:46,337 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 16:08:46,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 16:08:46,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 16:08:46,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 16:08:46,340 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 16:08:46,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 16:08:46,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 16:08:46,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 16:08:46,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 16:08:46,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 16:08:46,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 16:08:46,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 16:08:46,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 16:08:46,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 16:08:46,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 16:08:46,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 16:08:46,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 16:08:46,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 16:08:46,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 16:08:46,364 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 16:08:46,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 16:08:46,365 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 16:08:46,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 16:08:46,366 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 16:08:46,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 16:08:46,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 16:08:46,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 16:08:46,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 16:08:46,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 16:08:46,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 16:08:46,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 16:08:46,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 16:08:46,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 16:08:46,370 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 16:08:46,371 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-02 16:08:46,386 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 16:08:46,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 16:08:46,386 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 16:08:46,387 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 16:08:46,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 16:08:46,388 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 16:08:46,388 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 16:08:46,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 16:08:46,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 16:08:46,388 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 16:08:46,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 16:08:46,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 16:08:46,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 16:08:46,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 16:08:46,389 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 16:08:46,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 16:08:46,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 16:08:46,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 16:08:46,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 16:08:46,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 16:08:46,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 16:08:46,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 16:08:46,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 16:08:46,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 16:08:46,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 16:08:46,391 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 16:08:46,391 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 16:08:46,391 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 16:08:46,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 16:08:46,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 [2021-11-02 16:08:46,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 16:08:46,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 16:08:46,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 16:08:46,603 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 16:08:46,604 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 16:08:46,605 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2021-11-02 16:08:46,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94edef25c/480b099552c5498498ecc911369e27b5/FLAG114af805b [2021-11-02 16:08:47,150 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 16:08:47,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2021-11-02 16:08:47,181 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94edef25c/480b099552c5498498ecc911369e27b5/FLAG114af805b [2021-11-02 16:08:47,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94edef25c/480b099552c5498498ecc911369e27b5 [2021-11-02 16:08:47,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 16:08:47,402 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 16:08:47,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 16:08:47,406 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 16:08:47,409 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 16:08:47,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 04:08:47" (1/1) ... [2021-11-02 16:08:47,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46401c2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 04:08:47, skipping insertion in model container [2021-11-02 16:08:47,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 04:08:47" (1/1) ... [2021-11-02 16:08:47,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 16:08:47,488 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 16:08:48,381 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2021-11-02 16:08:48,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 16:08:48,433 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 16:08:48,668 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2021-11-02 16:08:48,679 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 16:08:48,749 INFO L208 MainTranslator]: Completed translation [2021-11-02 16:08:48,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 04:08:48 WrapperNode [2021-11-02 16:08:48,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 16:08:48,752 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 16:08:48,753 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 16:08:48,753 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 16:08:48,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 04:08:48" (1/1) ... [2021-11-02 16:08:48,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 04:08:48" (1/1) ... [2021-11-02 16:08:49,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 16:08:49,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 16:08:49,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 16:08:49,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 16:08:49,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 04:08:48" (1/1) ... [2021-11-02 16:08:49,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 04:08:48" (1/1) ... [2021-11-02 16:08:50,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 04:08:48" (1/1) ... [2021-11-02 16:08:50,195 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 04:08:48" (1/1) ... [2021-11-02 16:08:50,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 04:08:48" (1/1) ... [2021-11-02 16:08:51,022 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 04:08:48" (1/1) ... [2021-11-02 16:08:51,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 04:08:48" (1/1) ... [2021-11-02 16:08:51,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 16:08:51,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 16:08:51,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 16:08:51,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 16:08:51,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 04:08:48" (1/1) ... [2021-11-02 16:08:51,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 16:08:51,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 16:08:51,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 16:08:51,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 16:08:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-02 16:08:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_recsrc2 [2021-11-02 16:08:51,651 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_recsrc2 [2021-11-02 16:08:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 16:08:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-02 16:08:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 16:08:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 16:08:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-11-02 16:08:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 16:08:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 16:08:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-02 16:08:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 16:08:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 16:08:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-02 16:08:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-02 16:08:51,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-02 16:08:51,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 16:08:51,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 16:08:51,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 16:09:03,472 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 16:09:03,472 INFO L299 CfgBuilder]: Removed 9499 assume(true) statements. [2021-11-02 16:09:03,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 04:09:03 BoogieIcfgContainer [2021-11-02 16:09:03,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 16:09:03,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 16:09:03,485 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 16:09:03,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 16:09:03,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 04:08:47" (1/3) ... [2021-11-02 16:09:03,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c13f082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 04:09:03, skipping insertion in model container [2021-11-02 16:09:03,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 04:08:48" (2/3) ... [2021-11-02 16:09:03,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c13f082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 04:09:03, skipping insertion in model container [2021-11-02 16:09:03,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 04:09:03" (3/3) ... [2021-11-02 16:09:03,489 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2021-11-02 16:09:03,495 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 16:09:03,496 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 260 error locations. [2021-11-02 16:09:03,559 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 16:09:03,565 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 16:09:03,565 INFO L340 AbstractCegarLoop]: Starting to check reachability of 260 error locations. [2021-11-02 16:09:03,694 INFO L276 IsEmpty]: Start isEmpty. Operand has 11252 states, 10886 states have (on average 1.544093330883704) internal successors, (16809), 11146 states have internal predecessors, (16809), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-02 16:09:03,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-02 16:09:03,698 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 16:09:03,698 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 16:09:03,699 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr257ASSERT_VIOLATIONERROR_FUNCTION === [snd_mixer_oss_get_recsrc2Err0ASSERT_VIOLATIONERROR_FUNCTION, snd_mixer_oss_get_recsrc2Err1ASSERT_VIOLATIONERROR_FUNCTION (and 258 more)] === [2021-11-02 16:09:03,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 16:09:03,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1324479388, now seen corresponding path program 1 times [2021-11-02 16:09:03,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 16:09:03,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482686566] [2021-11-02 16:09:03,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 16:09:03,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 16:09:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 16:09:04,087 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 16:09:04,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 16:09:04,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482686566] [2021-11-02 16:09:04,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482686566] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 16:09:04,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 16:09:04,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 16:09:04,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565882837] [2021-11-02 16:09:04,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 16:09:04,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 16:09:04,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 16:09:04,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 16:09:04,133 INFO L87 Difference]: Start difference. First operand has 11252 states, 10886 states have (on average 1.544093330883704) internal successors, (16809), 11146 states have internal predecessors, (16809), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 16:09:07,023 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:09:10,519 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:09:23,659 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:09:35,733 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:09:41,699 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:09:46,022 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:10:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 16:10:06,357 INFO L93 Difference]: Finished difference Result 16331 states and 24105 transitions. [2021-11-02 16:10:06,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 16:10:06,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2021-11-02 16:10:06,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 16:10:06,396 INFO L225 Difference]: With dead ends: 16331 [2021-11-02 16:10:06,396 INFO L226 Difference]: Without dead ends: 5078 [2021-11-02 16:10:06,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.26ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 16:10:06,451 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 69 mSDsluCounter, 6324 mSDsCounter, 0 mSdLazyCounter, 12247 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 57719.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 12253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 120.18ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12247 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61208.01ms IncrementalHoareTripleChecker+Time [2021-11-02 16:10:06,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 412 Invalid, 12253 Unknown, 0 Unchecked, 120.18ms Time], IncrementalHoareTripleChecker [0 Valid, 12247 Invalid, 6 Unknown, 0 Unchecked, 61208.01ms Time] [2021-11-02 16:10:06,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2021-11-02 16:10:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 5027. [2021-11-02 16:10:06,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5027 states, 4662 states have (on average 1.3142428142428142) internal successors, (6127), 4921 states have internal predecessors, (6127), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-02 16:10:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5027 states to 5027 states and 6333 transitions. [2021-11-02 16:10:06,643 INFO L78 Accepts]: Start accepts. Automaton has 5027 states and 6333 transitions. Word has length 8 [2021-11-02 16:10:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 16:10:06,644 INFO L470 AbstractCegarLoop]: Abstraction has 5027 states and 6333 transitions. [2021-11-02 16:10:06,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 16:10:06,645 INFO L276 IsEmpty]: Start isEmpty. Operand 5027 states and 6333 transitions. [2021-11-02 16:10:06,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 16:10:06,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 16:10:06,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 16:10:06,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 16:10:06,647 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr257ASSERT_VIOLATIONERROR_FUNCTION === [snd_mixer_oss_get_recsrc2Err0ASSERT_VIOLATIONERROR_FUNCTION, snd_mixer_oss_get_recsrc2Err1ASSERT_VIOLATIONERROR_FUNCTION (and 258 more)] === [2021-11-02 16:10:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 16:10:06,648 INFO L85 PathProgramCache]: Analyzing trace with hash 439110634, now seen corresponding path program 1 times [2021-11-02 16:10:06,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 16:10:06,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537164633] [2021-11-02 16:10:06,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 16:10:06,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 16:10:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 16:10:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 16:10:06,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 16:10:06,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537164633] [2021-11-02 16:10:06,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537164633] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 16:10:06,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854841375] [2021-11-02 16:10:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 16:10:06,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 16:10:06,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 16:10:06,846 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 16:10:06,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 16:10:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 16:10:07,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 16:10:07,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 16:10:07,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 16:10:07,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 16:10:07,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 16:10:07,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854841375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 16:10:07,808 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 16:10:07,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-02 16:10:07,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077798821] [2021-11-02 16:10:07,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 16:10:07,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 16:10:07,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 16:10:07,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 16:10:07,810 INFO L87 Difference]: Start difference. First operand 5027 states and 6333 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 16:10:10,717 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:10:13,500 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:10:18,734 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:10:38,929 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:10:46,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:11:05,171 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:11:10,824 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:11:41,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 16:11:41,898 INFO L93 Difference]: Finished difference Result 9403 states and 11916 transitions. [2021-11-02 16:11:41,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 16:11:41,899 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 12 [2021-11-02 16:11:41,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 16:11:41,925 INFO L225 Difference]: With dead ends: 9403 [2021-11-02 16:11:41,925 INFO L226 Difference]: Without dead ends: 5185 [2021-11-02 16:11:41,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 125.53ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-02 16:11:41,944 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 474 mSDsluCounter, 12708 mSDsCounter, 0 mSdLazyCounter, 18430 mSolverCounterSat, 4 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88907.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 18441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 147.00ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18430 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93177.95ms IncrementalHoareTripleChecker+Time [2021-11-02 16:11:41,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 618 Invalid, 18441 Unknown, 0 Unchecked, 147.00ms Time], IncrementalHoareTripleChecker [4 Valid, 18430 Invalid, 7 Unknown, 0 Unchecked, 93177.95ms Time] [2021-11-02 16:11:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5185 states. [2021-11-02 16:11:42,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5185 to 5162. [2021-11-02 16:11:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5162 states, 4797 states have (on average 1.3160308526162185) internal successors, (6313), 5056 states have internal predecessors, (6313), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-02 16:11:42,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 6519 transitions. [2021-11-02 16:11:42,053 INFO L78 Accepts]: Start accepts. Automaton has 5162 states and 6519 transitions. Word has length 12 [2021-11-02 16:11:42,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 16:11:42,054 INFO L470 AbstractCegarLoop]: Abstraction has 5162 states and 6519 transitions. [2021-11-02 16:11:42,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 16:11:42,054 INFO L276 IsEmpty]: Start isEmpty. Operand 5162 states and 6519 transitions. [2021-11-02 16:11:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 16:11:42,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 16:11:42,056 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 16:11:42,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 16:11:42,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 16:11:42,275 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr257ASSERT_VIOLATIONERROR_FUNCTION === [snd_mixer_oss_get_recsrc2Err0ASSERT_VIOLATIONERROR_FUNCTION, snd_mixer_oss_get_recsrc2Err1ASSERT_VIOLATIONERROR_FUNCTION (and 258 more)] === [2021-11-02 16:11:42,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 16:11:42,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1285272876, now seen corresponding path program 2 times [2021-11-02 16:11:42,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 16:11:42,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278812385] [2021-11-02 16:11:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 16:11:42,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 16:11:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 16:11:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-02 16:11:42,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 16:11:42,457 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278812385] [2021-11-02 16:11:42,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278812385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 16:11:42,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 16:11:42,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 16:11:42,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468747774] [2021-11-02 16:11:42,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 16:11:42,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 16:11:42,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 16:11:42,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 16:11:42,458 INFO L87 Difference]: Start difference. First operand 5162 states and 6519 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16:11:46,201 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:11:50,264 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:12:01,703 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:12:06,555 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:12:19,165 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:12:24,920 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:13:22,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 16:13:22,531 INFO L93 Difference]: Finished difference Result 7686 states and 9820 transitions. [2021-11-02 16:13:22,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 16:13:22,531 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 24 [2021-11-02 16:13:22,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 16:13:22,560 INFO L225 Difference]: With dead ends: 7686 [2021-11-02 16:13:22,561 INFO L226 Difference]: Without dead ends: 7683 [2021-11-02 16:13:22,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.47ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 16:13:22,565 INFO L933 BasicCegarLoop]: 270 mSDtfsCounter, 6341 mSDsluCounter, 12643 mSDsCounter, 0 mSdLazyCounter, 18353 mSolverCounterSat, 128 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93822.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6341 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 18487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 136.44ms SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 18353 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98965.20ms IncrementalHoareTripleChecker+Time [2021-11-02 16:13:22,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6341 Valid, 682 Invalid, 18487 Unknown, 0 Unchecked, 136.44ms Time], IncrementalHoareTripleChecker [128 Valid, 18353 Invalid, 6 Unknown, 0 Unchecked, 98965.20ms Time] [2021-11-02 16:13:22,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7683 states. [2021-11-02 16:13:22,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7683 to 5162. [2021-11-02 16:13:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5162 states, 4797 states have (on average 1.3158223889931207) internal successors, (6312), 5056 states have internal predecessors, (6312), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-02 16:13:22,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5162 states to 5162 states and 6518 transitions. [2021-11-02 16:13:22,667 INFO L78 Accepts]: Start accepts. Automaton has 5162 states and 6518 transitions. Word has length 24 [2021-11-02 16:13:22,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 16:13:22,667 INFO L470 AbstractCegarLoop]: Abstraction has 5162 states and 6518 transitions. [2021-11-02 16:13:22,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16:13:22,668 INFO L276 IsEmpty]: Start isEmpty. Operand 5162 states and 6518 transitions. [2021-11-02 16:13:22,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 16:13:22,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 16:13:22,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 16:13:22,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 16:13:22,669 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [snd_mixer_oss_get_recsrc2Err0ASSERT_VIOLATIONERROR_FUNCTION, snd_mixer_oss_get_recsrc2Err1ASSERT_VIOLATIONERROR_FUNCTION (and 258 more)] === [2021-11-02 16:13:22,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 16:13:22,670 INFO L85 PathProgramCache]: Analyzing trace with hash 278588712, now seen corresponding path program 1 times [2021-11-02 16:13:22,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 16:13:22,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544027740] [2021-11-02 16:13:22,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 16:13:22,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 16:13:22,715 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 16:13:22,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428494457] [2021-11-02 16:13:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 16:13:22,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 16:13:22,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 16:13:22,736 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 16:13:22,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 16:13:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 16:13:23,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 1986 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 16:13:23,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 16:13:23,508 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 16:13:23,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 16:13:23,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 16:13:23,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544027740] [2021-11-02 16:13:23,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 16:13:23,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428494457] [2021-11-02 16:13:23,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428494457] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 16:13:23,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 16:13:23,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 16:13:23,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096630631] [2021-11-02 16:13:23,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 16:13:23,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 16:13:23,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 16:13:23,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 16:13:23,510 INFO L87 Difference]: Start difference. First operand 5162 states and 6518 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 16:13:26,001 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:13:28,744 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:13:33,266 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:13:49,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:13:55,159 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:14:08,366 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:14:12,536 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:14:13,871 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:14:37,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 16:14:37,536 INFO L93 Difference]: Finished difference Result 10191 states and 12855 transitions. [2021-11-02 16:14:37,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 16:14:37,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 27 [2021-11-02 16:14:37,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 16:14:37,555 INFO L225 Difference]: With dead ends: 10191 [2021-11-02 16:14:37,555 INFO L226 Difference]: Without dead ends: 5168 [2021-11-02 16:14:37,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.19ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 16:14:37,573 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 3 mSDsluCounter, 6314 mSDsCounter, 0 mSdLazyCounter, 12236 mSolverCounterSat, 4 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 69922.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 12246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 59.19ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12236 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73405.89ms IncrementalHoareTripleChecker+Time [2021-11-02 16:14:37,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 412 Invalid, 12246 Unknown, 0 Unchecked, 59.19ms Time], IncrementalHoareTripleChecker [4 Valid, 12236 Invalid, 6 Unknown, 0 Unchecked, 73405.89ms Time] [2021-11-02 16:14:37,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5168 states. [2021-11-02 16:14:37,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5168 to 5165. [2021-11-02 16:14:37,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5165 states, 4800 states have (on average 1.315625) internal successors, (6315), 5059 states have internal predecessors, (6315), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-02 16:14:37,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5165 states to 5165 states and 6521 transitions. [2021-11-02 16:14:37,661 INFO L78 Accepts]: Start accepts. Automaton has 5165 states and 6521 transitions. Word has length 27 [2021-11-02 16:14:37,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 16:14:37,666 INFO L470 AbstractCegarLoop]: Abstraction has 5165 states and 6521 transitions. [2021-11-02 16:14:37,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 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 16:14:37,666 INFO L276 IsEmpty]: Start isEmpty. Operand 5165 states and 6521 transitions. [2021-11-02 16:14:37,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 16:14:37,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 16:14:37,669 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 16:14:37,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 16:14:37,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-02 16:14:37,889 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr257ASSERT_VIOLATIONERROR_FUNCTION === [snd_mixer_oss_get_recsrc2Err0ASSERT_VIOLATIONERROR_FUNCTION, snd_mixer_oss_get_recsrc2Err1ASSERT_VIOLATIONERROR_FUNCTION (and 258 more)] === [2021-11-02 16:14:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 16:14:37,889 INFO L85 PathProgramCache]: Analyzing trace with hash -293101137, now seen corresponding path program 1 times [2021-11-02 16:14:37,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 16:14:37,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190491114] [2021-11-02 16:14:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 16:14:37,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 16:14:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 16:14:38,020 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-02 16:14:38,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 16:14:38,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190491114] [2021-11-02 16:14:38,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190491114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 16:14:38,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 16:14:38,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 16:14:38,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865055212] [2021-11-02 16:14:38,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 16:14:38,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 16:14:38,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 16:14:38,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 16:14:38,022 INFO L87 Difference]: Start difference. First operand 5165 states and 6521 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 16:14:41,608 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:14:46,437 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:15:03,842 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:15:09,796 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:15:11,851 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:15:24,426 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:15:26,474 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:15:31,054 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:15:55,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 16:15:55,238 INFO L93 Difference]: Finished difference Result 5221 states and 6596 transitions. [2021-11-02 16:15:55,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 16:15:55,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 28 [2021-11-02 16:15:55,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 16:15:55,259 INFO L225 Difference]: With dead ends: 5221 [2021-11-02 16:15:55,262 INFO L226 Difference]: Without dead ends: 5218 [2021-11-02 16:15:55,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.71ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 16:15:55,266 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 69 mSDsluCounter, 6321 mSDsCounter, 0 mSdLazyCounter, 12239 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72562.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 12245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 61.73ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12239 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76733.01ms IncrementalHoareTripleChecker+Time [2021-11-02 16:15:55,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 412 Invalid, 12245 Unknown, 0 Unchecked, 61.73ms Time], IncrementalHoareTripleChecker [0 Valid, 12239 Invalid, 6 Unknown, 0 Unchecked, 76733.01ms Time] [2021-11-02 16:15:55,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5218 states. [2021-11-02 16:15:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5218 to 5166. [2021-11-02 16:15:55,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5166 states, 4801 states have (on average 1.315559258487815) internal successors, (6316), 5060 states have internal predecessors, (6316), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2021-11-02 16:15:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5166 states to 5166 states and 6522 transitions. [2021-11-02 16:15:55,331 INFO L78 Accepts]: Start accepts. Automaton has 5166 states and 6522 transitions. Word has length 28 [2021-11-02 16:15:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 16:15:55,331 INFO L470 AbstractCegarLoop]: Abstraction has 5166 states and 6522 transitions. [2021-11-02 16:15:55,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 16:15:55,331 INFO L276 IsEmpty]: Start isEmpty. Operand 5166 states and 6522 transitions. [2021-11-02 16:15:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 16:15:55,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 16:15:55,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 16:15:55,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 16:15:55,332 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [snd_mixer_oss_get_recsrc2Err0ASSERT_VIOLATIONERROR_FUNCTION, snd_mixer_oss_get_recsrc2Err1ASSERT_VIOLATIONERROR_FUNCTION (and 258 more)] === [2021-11-02 16:15:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 16:15:55,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1005756, now seen corresponding path program 1 times [2021-11-02 16:15:55,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 16:15:55,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214169990] [2021-11-02 16:15:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 16:15:55,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 16:15:55,375 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 16:15:55,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363999335] [2021-11-02 16:15:55,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 16:15:55,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 16:15:55,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 16:15:55,377 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 16:15:55,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 16:15:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 16:15:56,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 1992 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 16:15:56,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 16:15:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 16:15:56,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 16:15:56,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 16:15:56,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214169990] [2021-11-02 16:15:56,308 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 16:15:56,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363999335] [2021-11-02 16:15:56,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363999335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 16:15:56,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 16:15:56,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 16:15:56,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993165905] [2021-11-02 16:15:56,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 16:15:56,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 16:15:56,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 16:15:56,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 16:15:56,309 INFO L87 Difference]: Start difference. First operand 5166 states and 6522 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 16:15:58,804 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:16:01,355 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:16:04,950 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:16:15,195 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:16:19,400 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:16:28,025 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:16:34,284 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:16:51,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 16:16:51,705 INFO L93 Difference]: Finished difference Result 6179 states and 7991 transitions. [2021-11-02 16:16:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 16:16:51,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 29 [2021-11-02 16:16:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 16:16:51,729 INFO L225 Difference]: With dead ends: 6179 [2021-11-02 16:16:51,729 INFO L226 Difference]: Without dead ends: 6049 [2021-11-02 16:16:51,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.03ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 16:16:51,732 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 6123 mSDsluCounter, 1436 mSDsCounter, 0 mSdLazyCounter, 7591 mSolverCounterSat, 99 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 51279.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6123 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 7696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 61.46ms SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 7591 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54809.79ms IncrementalHoareTripleChecker+Time [2021-11-02 16:16:51,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6123 Valid, 218 Invalid, 7696 Unknown, 0 Unchecked, 61.46ms Time], IncrementalHoareTripleChecker [99 Valid, 7591 Invalid, 6 Unknown, 0 Unchecked, 54809.79ms Time] [2021-11-02 16:16:51,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6049 states. [2021-11-02 16:16:51,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6049 to 5968. [2021-11-02 16:16:51,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5968 states, 5628 states have (on average 1.339729921819474) internal successors, (7540), 5857 states have internal predecessors, (7540), 106 states have call successors, (106), 4 states have call predecessors, (106), 4 states have return successors, (109), 106 states have call predecessors, (109), 106 states have call successors, (109) [2021-11-02 16:16:51,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5968 states to 5968 states and 7755 transitions. [2021-11-02 16:16:51,834 INFO L78 Accepts]: Start accepts. Automaton has 5968 states and 7755 transitions. Word has length 29 [2021-11-02 16:16:51,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 16:16:51,834 INFO L470 AbstractCegarLoop]: Abstraction has 5968 states and 7755 transitions. [2021-11-02 16:16:51,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 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 16:16:51,834 INFO L276 IsEmpty]: Start isEmpty. Operand 5968 states and 7755 transitions. [2021-11-02 16:16:51,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 16:16:51,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 16:16:51,838 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 16:16:51,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 16:16:52,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 16:16:52,055 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr257ASSERT_VIOLATIONERROR_FUNCTION === [snd_mixer_oss_get_recsrc2Err0ASSERT_VIOLATIONERROR_FUNCTION, snd_mixer_oss_get_recsrc2Err1ASSERT_VIOLATIONERROR_FUNCTION (and 258 more)] === [2021-11-02 16:16:52,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 16:16:52,056 INFO L85 PathProgramCache]: Analyzing trace with hash 401127933, now seen corresponding path program 1 times [2021-11-02 16:16:52,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 16:16:52,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663761980] [2021-11-02 16:16:52,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 16:16:52,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 16:16:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 16:16:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-02 16:16:52,267 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 16:16:52,267 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663761980] [2021-11-02 16:16:52,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663761980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 16:16:52,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561315262] [2021-11-02 16:16:52,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 16:16:52,268 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 16:16:52,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 16:16:52,271 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 16:16:52,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 16:16:52,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 16:16:52,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 16:16:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 16:16:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 16:16:53,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 16:16:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 16:16:53,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561315262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 16:16:53,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-11-02 16:16:53,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-11-02 16:16:53,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250380761] [2021-11-02 16:16:53,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 16:16:53,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 16:16:53,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 16:16:53,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-02 16:16:53,909 INFO L87 Difference]: Start difference. First operand 5968 states and 7755 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 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 16:16:56,454 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:16:58,632 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:17:00,783 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:17:04,285 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:17:18,331 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:17:41,376 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:18:00,902 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.14s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:18:37,004 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:18:45,734 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:18:47,771 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:18:49,817 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:18:51,863 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:19:51,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 16:19:51,030 INFO L93 Difference]: Finished difference Result 11383 states and 14884 transitions. [2021-11-02 16:19:51,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 16:19:51,030 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 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 32 [2021-11-02 16:19:51,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 16:19:51,057 INFO L225 Difference]: With dead ends: 11383 [2021-11-02 16:19:51,057 INFO L226 Difference]: Without dead ends: 6419 [2021-11-02 16:19:51,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 618.07ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-02 16:19:51,068 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 1367 mSDsluCounter, 25552 mSDsCounter, 0 mSdLazyCounter, 30853 mSolverCounterSat, 9 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 168096.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 30873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 229.30ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30853 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 175867.75ms IncrementalHoareTripleChecker+Time [2021-11-02 16:19:51,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1367 Valid, 1030 Invalid, 30873 Unknown, 0 Unchecked, 229.30ms Time], IncrementalHoareTripleChecker [9 Valid, 30853 Invalid, 11 Unknown, 0 Unchecked, 175867.75ms Time] [2021-11-02 16:19:51,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6419 states. [2021-11-02 16:19:51,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6419 to 6283. [2021-11-02 16:19:51,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6283 states, 5943 states have (on average 1.3417465926299847) internal successors, (7974), 6172 states have internal predecessors, (7974), 106 states have call successors, (106), 4 states have call predecessors, (106), 4 states have return successors, (109), 106 states have call predecessors, (109), 106 states have call successors, (109) [2021-11-02 16:19:51,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6283 states to 6283 states and 8189 transitions. [2021-11-02 16:19:51,168 INFO L78 Accepts]: Start accepts. Automaton has 6283 states and 8189 transitions. Word has length 32 [2021-11-02 16:19:51,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 16:19:51,170 INFO L470 AbstractCegarLoop]: Abstraction has 6283 states and 8189 transitions. [2021-11-02 16:19:51,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 14 states have internal predecessors, (66), 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 16:19:51,170 INFO L276 IsEmpty]: Start isEmpty. Operand 6283 states and 8189 transitions. [2021-11-02 16:19:51,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 16:19:51,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 16:19:51,180 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 16:19:51,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 16:19:51,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 16:19:51,395 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [snd_mixer_oss_get_recsrc2Err0ASSERT_VIOLATIONERROR_FUNCTION, snd_mixer_oss_get_recsrc2Err1ASSERT_VIOLATIONERROR_FUNCTION (and 258 more)] === [2021-11-02 16:19:51,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 16:19:51,396 INFO L85 PathProgramCache]: Analyzing trace with hash 804314503, now seen corresponding path program 1 times [2021-11-02 16:19:51,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 16:19:51,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783385099] [2021-11-02 16:19:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 16:19:51,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 16:19:51,445 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 16:19:51,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327893002] [2021-11-02 16:19:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 16:19:51,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 16:19:51,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 16:19:51,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 16:19:51,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 16:19:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 16:19:52,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 2141 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 16:19:52,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 16:19:52,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 16:19:52,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 16:19:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 16:19:52,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 16:19:52,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783385099] [2021-11-02 16:19:52,671 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 16:19:52,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327893002] [2021-11-02 16:19:52,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327893002] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 16:19:52,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 16:19:52,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-02 16:19:52,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627331031] [2021-11-02 16:19:52,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 16:19:52,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 16:19:52,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 16:19:52,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 16:19:52,673 INFO L87 Difference]: Start difference. First operand 6283 states and 8189 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 16:19:57,575 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:20:09,694 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:20:19,280 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:20:39,837 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:20:56,306 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:20:58,347 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:21:00,397 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:21:07,075 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:21:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 16:21:42,248 INFO L93 Difference]: Finished difference Result 12181 states and 15852 transitions. [2021-11-02 16:21:42,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 16:21:42,248 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 43 [2021-11-02 16:21:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 16:21:42,291 INFO L225 Difference]: With dead ends: 12181 [2021-11-02 16:21:42,292 INFO L226 Difference]: Without dead ends: 6307 [2021-11-02 16:21:42,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.80ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-02 16:21:42,307 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 18 mSDsluCounter, 12508 mSDsCounter, 0 mSdLazyCounter, 18181 mSolverCounterSat, 26 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 102844.22ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 18214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 114.53ms SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 18181 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 108778.21ms IncrementalHoareTripleChecker+Time [2021-11-02 16:21:42,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 618 Invalid, 18214 Unknown, 0 Unchecked, 114.53ms Time], IncrementalHoareTripleChecker [26 Valid, 18181 Invalid, 7 Unknown, 0 Unchecked, 108778.21ms Time] [2021-11-02 16:21:42,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6307 states. [2021-11-02 16:21:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6307 to 6307. [2021-11-02 16:21:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6307 states, 5967 states have (on average 1.340372046254399) internal successors, (7998), 6196 states have internal predecessors, (7998), 106 states have call successors, (106), 4 states have call predecessors, (106), 4 states have return successors, (109), 106 states have call predecessors, (109), 106 states have call successors, (109) [2021-11-02 16:21:42,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6307 states to 6307 states and 8213 transitions. [2021-11-02 16:21:42,418 INFO L78 Accepts]: Start accepts. Automaton has 6307 states and 8213 transitions. Word has length 43 [2021-11-02 16:21:42,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 16:21:42,418 INFO L470 AbstractCegarLoop]: Abstraction has 6307 states and 8213 transitions. [2021-11-02 16:21:42,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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 16:21:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 6307 states and 8213 transitions. [2021-11-02 16:21:42,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 16:21:42,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 16:21:42,420 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:21:42,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-02 16:21:42,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 16:21:42,641 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [snd_mixer_oss_get_recsrc2Err0ASSERT_VIOLATIONERROR_FUNCTION, snd_mixer_oss_get_recsrc2Err1ASSERT_VIOLATIONERROR_FUNCTION (and 258 more)] === [2021-11-02 16:21:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 16:21:42,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1993629403, now seen corresponding path program 2 times [2021-11-02 16:21:42,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 16:21:42,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177415185] [2021-11-02 16:21:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 16:21:42,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 16:21:42,676 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 16:21:42,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67339274] [2021-11-02 16:21:42,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 16:21:42,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 16:21:42,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 16:21:42,693 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 16:21:42,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 16:21:43,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-02 16:21:43,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 16:21:43,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 2135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 16:21:43,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 16:21:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 16:21:43,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-02 16:21:43,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 16:21:43,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177415185] [2021-11-02 16:21:43,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 16:21:43,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67339274] [2021-11-02 16:21:43,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67339274] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 16:21:43,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 16:21:43,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 16:21:43,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942587258] [2021-11-02 16:21:43,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 16:21:43,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 16:21:43,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 16:21:43,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 16:21:43,647 INFO L87 Difference]: Start difference. First operand 6307 states and 8213 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 16:21:47,792 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:21:56,130 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:22:03,970 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:22:17,783 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:22:30,033 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:22:32,084 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:22:37,396 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:23:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 16:23:02,213 INFO L93 Difference]: Finished difference Result 12213 states and 15880 transitions. [2021-11-02 16:23:02,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 16:23:02,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 49 [2021-11-02 16:23:02,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 16:23:02,234 INFO L225 Difference]: With dead ends: 12213 [2021-11-02 16:23:02,234 INFO L226 Difference]: Without dead ends: 6315 [2021-11-02 16:23:02,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.73ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 16:23:02,251 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 0 mSDsluCounter, 6131 mSDsCounter, 0 mSdLazyCounter, 12115 mSolverCounterSat, 6 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73446.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 12127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 74.57ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 12115 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77906.18ms IncrementalHoareTripleChecker+Time [2021-11-02 16:23:02,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 412 Invalid, 12127 Unknown, 0 Unchecked, 74.57ms Time], IncrementalHoareTripleChecker [6 Valid, 12115 Invalid, 6 Unknown, 0 Unchecked, 77906.18ms Time] [2021-11-02 16:23:02,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6315 states. [2021-11-02 16:23:02,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6315 to 6315. [2021-11-02 16:23:02,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6315 states, 5975 states have (on average 1.3399163179916318) internal successors, (8006), 6204 states have internal predecessors, (8006), 106 states have call successors, (106), 4 states have call predecessors, (106), 4 states have return successors, (109), 106 states have call predecessors, (109), 106 states have call successors, (109) [2021-11-02 16:23:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6315 states to 6315 states and 8221 transitions. [2021-11-02 16:23:02,369 INFO L78 Accepts]: Start accepts. Automaton has 6315 states and 8221 transitions. Word has length 49 [2021-11-02 16:23:02,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 16:23:02,370 INFO L470 AbstractCegarLoop]: Abstraction has 6315 states and 8221 transitions. [2021-11-02 16:23:02,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 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 16:23:02,370 INFO L276 IsEmpty]: Start isEmpty. Operand 6315 states and 8221 transitions. [2021-11-02 16:23:02,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 16:23:02,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-02 16:23:02,372 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:23:02,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 16:23:02,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 16:23:02,594 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [snd_mixer_oss_get_recsrc2Err0ASSERT_VIOLATIONERROR_FUNCTION, snd_mixer_oss_get_recsrc2Err1ASSERT_VIOLATIONERROR_FUNCTION (and 258 more)] === [2021-11-02 16:23:02,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 16:23:02,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1545583037, now seen corresponding path program 1 times [2021-11-02 16:23:02,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 16:23:02,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593166587] [2021-11-02 16:23:02,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 16:23:02,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 16:23:02,633 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-02 16:23:02,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884820262] [2021-11-02 16:23:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 16:23:02,634 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 16:23:02,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-02 16:23:02,648 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 16:23:02,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 16:23:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 16:23:03,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 2165 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 16:23:03,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 16:23:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 16:23:03,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 16:23:04,318 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 16:23:04,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 16:23:04,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593166587] [2021-11-02 16:23:04,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-02 16:23:04,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884820262] [2021-11-02 16:23:04,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884820262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-02 16:23:04,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 16:23:04,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-02 16:23:04,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110981841] [2021-11-02 16:23:04,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 16:23:04,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 16:23:04,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 16:23:04,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-02 16:23:04,320 INFO L87 Difference]: Start difference. First operand 6315 states and 8221 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 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 16:23:07,023 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-02 16:23:11,498 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] Killed by 15