./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 16:22:20,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 16:22:20,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 16:22:20,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 16:22:20,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 16:22:20,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 16:22:20,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 16:22:20,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 16:22:20,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 16:22:20,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 16:22:20,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 16:22:20,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 16:22:20,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 16:22:20,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 16:22:20,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 16:22:20,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 16:22:20,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 16:22:20,342 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 16:22:20,343 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 16:22:20,347 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 16:22:20,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 16:22:20,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 16:22:20,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 16:22:20,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 16:22:20,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 16:22:20,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 16:22:20,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 16:22:20,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 16:22:20,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 16:22:20,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 16:22:20,357 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 16:22:20,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 16:22:20,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 16:22:20,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 16:22:20,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 16:22:20,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 16:22:20,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 16:22:20,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 16:22:20,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 16:22:20,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 16:22:20,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 16:22:20,364 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 16:22:20,387 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 16:22:20,387 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 16:22:20,388 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 16:22:20,388 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 16:22:20,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 16:22:20,389 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 16:22:20,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 16:22:20,389 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 16:22:20,389 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 16:22:20,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 16:22:20,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 16:22:20,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 16:22:20,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 16:22:20,391 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 16:22:20,391 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 16:22:20,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 16:22:20,391 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 16:22:20,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 16:22:20,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 16:22:20,392 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 16:22:20,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 16:22:20,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:22:20,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 16:22:20,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 16:22:20,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 16:22:20,393 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 16:22:20,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 16:22:20,394 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 16:22:20,394 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 16:22:20,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 16:22:20,394 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 16:22:20,394 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bad5b7f91b61cdf9d4f1ace01330b8d7c80f8ede0ca40c43d18f706f54101eb [2021-12-21 16:22:20,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 16:22:20,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 16:22:20,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 16:22:20,581 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 16:22:20,583 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 16:22:20,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-12-21 16:22:20,625 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e5421b53/ab6707e869e64e349b04a26a3e6b4fd2/FLAG2e881d02d [2021-12-21 16:22:21,122 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 16:22:21,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-12-21 16:22:21,148 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e5421b53/ab6707e869e64e349b04a26a3e6b4fd2/FLAG2e881d02d [2021-12-21 16:22:21,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e5421b53/ab6707e869e64e349b04a26a3e6b4fd2 [2021-12-21 16:22:21,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 16:22:21,385 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 16:22:21,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 16:22:21,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 16:22:21,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 16:22:21,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:22:21" (1/1) ... [2021-12-21 16:22:21,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ca39a13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:22:21, skipping insertion in model container [2021-12-21 16:22:21,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:22:21" (1/1) ... [2021-12-21 16:22:21,397 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 16:22:21,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 16:22:21,942 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2021-12-21 16:22:21,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:22:21,966 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 16:22:22,126 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i[144238,144251] [2021-12-21 16:22:22,129 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:22:22,150 INFO L208 MainTranslator]: Completed translation [2021-12-21 16:22:22,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:22:22 WrapperNode [2021-12-21 16:22:22,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 16:22:22,152 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 16:22:22,152 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 16:22:22,152 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 16:22:22,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:22:22" (1/1) ... [2021-12-21 16:22:22,188 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:22:22" (1/1) ... [2021-12-21 16:22:22,248 INFO L137 Inliner]: procedures = 115, calls = 787, calls flagged for inlining = 53, calls inlined = 52, statements flattened = 1905 [2021-12-21 16:22:22,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 16:22:22,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 16:22:22,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 16:22:22,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 16:22:22,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:22:22" (1/1) ... [2021-12-21 16:22:22,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:22:22" (1/1) ... [2021-12-21 16:22:22,286 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:22:22" (1/1) ... [2021-12-21 16:22:22,286 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:22:22" (1/1) ... [2021-12-21 16:22:22,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:22:22" (1/1) ... [2021-12-21 16:22:22,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:22:22" (1/1) ... [2021-12-21 16:22:22,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:22:22" (1/1) ... [2021-12-21 16:22:22,397 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 16:22:22,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 16:22:22,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 16:22:22,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 16:22:22,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:22:22" (1/1) ... [2021-12-21 16:22:22,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:22:22,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:22:22,436 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 16:22:22,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 16:22:22,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-21 16:22:22,461 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-12-21 16:22:22,461 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-12-21 16:22:22,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-21 16:22:22,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-21 16:22:22,462 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-21 16:22:22,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-21 16:22:22,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 16:22:22,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-12-21 16:22:22,462 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-12-21 16:22:22,462 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-12-21 16:22:22,462 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-12-21 16:22:22,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-21 16:22:22,463 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-21 16:22:22,463 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-21 16:22:22,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-21 16:22:22,463 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 16:22:22,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 16:22:22,463 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-12-21 16:22:22,463 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-12-21 16:22:22,463 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-21 16:22:22,463 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-21 16:22:22,464 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_serial_port_data [2021-12-21 16:22:22,464 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_serial_port_data [2021-12-21 16:22:22,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 16:22:22,464 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_tty [2021-12-21 16:22:22,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_tty [2021-12-21 16:22:22,464 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-12-21 16:22:22,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-12-21 16:22:22,464 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 16:22:22,464 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 16:22:22,465 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_detach_1 [2021-12-21 16:22:22,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_detach_1 [2021-12-21 16:22:22,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 16:22:22,465 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-12-21 16:22:22,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-12-21 16:22:22,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 16:22:22,466 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_tiocmset [2021-12-21 16:22:22,466 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_tiocmset [2021-12-21 16:22:22,466 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_tiocmget [2021-12-21 16:22:22,466 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_tiocmget [2021-12-21 16:22:22,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 16:22:22,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 16:22:22,466 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 16:22:22,467 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_ioctl [2021-12-21 16:22:22,467 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_ioctl [2021-12-21 16:22:22,467 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-12-21 16:22:22,467 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-12-21 16:22:22,467 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-12-21 16:22:22,467 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-12-21 16:22:22,467 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_write_room [2021-12-21 16:22:22,467 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_write_room [2021-12-21 16:22:22,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 16:22:22,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 16:22:22,468 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_init_termios [2021-12-21 16:22:22,468 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_init_termios [2021-12-21 16:22:22,468 INFO L130 BoogieDeclarations]: Found specification of procedure usb_serial_deregister [2021-12-21 16:22:22,469 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_serial_deregister [2021-12-21 16:22:22,469 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-12-21 16:22:22,470 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-12-21 16:22:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-21 16:22:22,470 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-21 16:22:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 16:22:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure kobil_set_termios [2021-12-21 16:22:22,470 INFO L138 BoogieDeclarations]: Found implementation of procedure kobil_set_termios [2021-12-21 16:22:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-21 16:22:22,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 16:22:22,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 16:22:22,816 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 16:22:22,817 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 16:22:23,037 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-21 16:22:26,313 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 16:22:26,325 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 16:22:26,325 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 16:22:26,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:22:26 BoogieIcfgContainer [2021-12-21 16:22:26,328 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 16:22:26,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 16:22:26,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 16:22:26,332 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 16:22:26,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:22:21" (1/3) ... [2021-12-21 16:22:26,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13543964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:22:26, skipping insertion in model container [2021-12-21 16:22:26,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:22:22" (2/3) ... [2021-12-21 16:22:26,333 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13543964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:22:26, skipping insertion in model container [2021-12-21 16:22:26,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:22:26" (3/3) ... [2021-12-21 16:22:26,335 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-1dfa93a-1-100_1a-drivers--usb--serial--kobil_sct.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-12-21 16:22:26,340 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 16:22:26,340 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 16:22:26,381 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 16:22:26,386 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 16:22:26,386 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 16:22:26,419 INFO L276 IsEmpty]: Start isEmpty. Operand has 587 states, 446 states have (on average 1.4103139013452914) internal successors, (629), 453 states have internal predecessors, (629), 114 states have call successors, (114), 26 states have call predecessors, (114), 25 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) [2021-12-21 16:22:26,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-21 16:22:26,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:22:26,438 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:22:26,438 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:22:26,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:22:26,441 INFO L85 PathProgramCache]: Analyzing trace with hash -2036575917, now seen corresponding path program 1 times [2021-12-21 16:22:26,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:22:26,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613749994] [2021-12-21 16:22:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:22:26,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:22:26,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:22:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:22:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:22:26,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:22:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:26,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:22:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:26,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 16:22:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 16:22:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 16:22:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 16:22:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 16:22:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 16:22:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 16:22:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-21 16:22:26,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:22:26,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613749994] [2021-12-21 16:22:26,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613749994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:22:26,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:22:26,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 16:22:26,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27739458] [2021-12-21 16:22:26,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:22:26,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:22:26,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:22:26,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:22:26,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:22:26,999 INFO L87 Difference]: Start difference. First operand has 587 states, 446 states have (on average 1.4103139013452914) internal successors, (629), 453 states have internal predecessors, (629), 114 states have call successors, (114), 26 states have call predecessors, (114), 25 states have return successors, (109), 109 states have call predecessors, (109), 109 states have call successors, (109) Second operand has 6 states, 6 states have (on average 8.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (15), 6 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 16:22:29,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:22:30,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:22:30,338 INFO L93 Difference]: Finished difference Result 1285 states and 1965 transitions. [2021-12-21 16:22:30,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:22:30,341 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (15), 6 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 128 [2021-12-21 16:22:30,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:22:30,352 INFO L225 Difference]: With dead ends: 1285 [2021-12-21 16:22:30,352 INFO L226 Difference]: Without dead ends: 686 [2021-12-21 16:22:30,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:22:30,359 INFO L933 BasicCegarLoop]: 858 mSDtfsCounter, 537 mSDsluCounter, 1299 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 437 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 2157 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 437 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:22:30,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 2157 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [437 Valid, 626 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-12-21 16:22:30,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-12-21 16:22:30,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 571. [2021-12-21 16:22:30,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 437 states have (on average 1.3981693363844394) internal successors, (611), 438 states have internal predecessors, (611), 108 states have call successors, (108), 25 states have call predecessors, (108), 25 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2021-12-21 16:22:30,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 827 transitions. [2021-12-21 16:22:30,452 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 827 transitions. Word has length 128 [2021-12-21 16:22:30,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:22:30,452 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 827 transitions. [2021-12-21 16:22:30,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (15), 6 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 16:22:30,453 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 827 transitions. [2021-12-21 16:22:30,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-21 16:22:30,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:22:30,455 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:22:30,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 16:22:30,456 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:22:30,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:22:30,456 INFO L85 PathProgramCache]: Analyzing trace with hash 282871191, now seen corresponding path program 1 times [2021-12-21 16:22:30,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:22:30,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809376898] [2021-12-21 16:22:30,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:22:30,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:22:30,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:22:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:22:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:22:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:22:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:22:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 16:22:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 16:22:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 16:22:30,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 16:22:30,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 16:22:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 16:22:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 16:22:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-21 16:22:30,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:22:30,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809376898] [2021-12-21 16:22:30,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809376898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:22:30,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:22:30,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:22:30,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117464153] [2021-12-21 16:22:30,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:22:30,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:22:30,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:22:30,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:22:30,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:22:30,716 INFO L87 Difference]: Start difference. First operand 571 states and 827 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 16:22:33,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:22:33,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:22:33,995 INFO L93 Difference]: Finished difference Result 1289 states and 1901 transitions. [2021-12-21 16:22:33,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:22:33,996 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 128 [2021-12-21 16:22:33,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:22:34,001 INFO L225 Difference]: With dead ends: 1289 [2021-12-21 16:22:34,001 INFO L226 Difference]: Without dead ends: 749 [2021-12-21 16:22:34,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 16:22:34,003 INFO L933 BasicCegarLoop]: 838 mSDtfsCounter, 886 mSDsluCounter, 1405 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 610 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 2243 SdHoareTripleChecker+Invalid, 1408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:22:34,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 2243 Invalid, 1408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 797 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-12-21 16:22:34,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-12-21 16:22:34,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 632. [2021-12-21 16:22:34,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 488 states have (on average 1.3913934426229508) internal successors, (679), 490 states have internal predecessors, (679), 113 states have call successors, (113), 30 states have call predecessors, (113), 30 states have return successors, (113), 113 states have call predecessors, (113), 113 states have call successors, (113) [2021-12-21 16:22:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 905 transitions. [2021-12-21 16:22:34,034 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 905 transitions. Word has length 128 [2021-12-21 16:22:34,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:22:34,035 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 905 transitions. [2021-12-21 16:22:34,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-21 16:22:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 905 transitions. [2021-12-21 16:22:34,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-12-21 16:22:34,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:22:34,038 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:22:34,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 16:22:34,049 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:22:34,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:22:34,050 INFO L85 PathProgramCache]: Analyzing trace with hash -971627008, now seen corresponding path program 1 times [2021-12-21 16:22:34,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:22:34,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482624559] [2021-12-21 16:22:34,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:22:34,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:22:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:22:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:22:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:22:34,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:22:34,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:22:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 16:22:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 16:22:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 16:22:34,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 16:22:34,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 16:22:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 16:22:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-21 16:22:34,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-21 16:22:34,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-21 16:22:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-21 16:22:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-21 16:22:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2021-12-21 16:22:34,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:22:34,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482624559] [2021-12-21 16:22:34,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482624559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:22:34,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:22:34,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:22:34,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523295099] [2021-12-21 16:22:34,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:22:34,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:22:34,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:22:34,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:22:34,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:22:34,318 INFO L87 Difference]: Start difference. First operand 632 states and 905 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (19), 6 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-21 16:22:36,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:22:38,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:22:38,003 INFO L93 Difference]: Finished difference Result 1706 states and 2508 transitions. [2021-12-21 16:22:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:22:38,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (19), 6 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 196 [2021-12-21 16:22:38,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:22:38,009 INFO L225 Difference]: With dead ends: 1706 [2021-12-21 16:22:38,009 INFO L226 Difference]: Without dead ends: 1111 [2021-12-21 16:22:38,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 16:22:38,012 INFO L933 BasicCegarLoop]: 888 mSDtfsCounter, 1377 mSDsluCounter, 1542 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 811 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1410 SdHoareTripleChecker+Valid, 2430 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 811 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:22:38,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1410 Valid, 2430 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [811 Valid, 1198 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-12-21 16:22:38,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-12-21 16:22:38,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 918. [2021-12-21 16:22:38,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 719 states have (on average 1.3741307371349096) internal successors, (988), 723 states have internal predecessors, (988), 147 states have call successors, (147), 48 states have call predecessors, (147), 51 states have return successors, (162), 149 states have call predecessors, (162), 147 states have call successors, (162) [2021-12-21 16:22:38,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1297 transitions. [2021-12-21 16:22:38,057 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1297 transitions. Word has length 196 [2021-12-21 16:22:38,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:22:38,060 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 1297 transitions. [2021-12-21 16:22:38,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (19), 6 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-21 16:22:38,061 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1297 transitions. [2021-12-21 16:22:38,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-21 16:22:38,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:22:38,064 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:22:38,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 16:22:38,066 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:22:38,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:22:38,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2029972223, now seen corresponding path program 1 times [2021-12-21 16:22:38,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:22:38,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415673486] [2021-12-21 16:22:38,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:22:38,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:22:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:22:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:22:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:22:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:22:38,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:38,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:22:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 16:22:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 16:22:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 16:22:38,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 16:22:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 16:22:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 16:22:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-21 16:22:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-21 16:22:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-21 16:22:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-21 16:22:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-21 16:22:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:38,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-12-21 16:22:38,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:22:38,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415673486] [2021-12-21 16:22:38,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415673486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:22:38,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:22:38,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:22:38,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138822698] [2021-12-21 16:22:38,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:22:38,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:22:38,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:22:38,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:22:38,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:22:38,352 INFO L87 Difference]: Start difference. First operand 918 states and 1297 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (21), 6 states have call predecessors, (21), 1 states have return successors, (19), 1 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-21 16:22:40,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:22:41,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:22:41,416 INFO L93 Difference]: Finished difference Result 1994 states and 2880 transitions. [2021-12-21 16:22:41,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:22:41,417 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (21), 6 states have call predecessors, (21), 1 states have return successors, (19), 1 states have call predecessors, (19), 1 states have call successors, (19) Word has length 206 [2021-12-21 16:22:41,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:22:41,422 INFO L225 Difference]: With dead ends: 1994 [2021-12-21 16:22:41,423 INFO L226 Difference]: Without dead ends: 1113 [2021-12-21 16:22:41,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-21 16:22:41,429 INFO L933 BasicCegarLoop]: 800 mSDtfsCounter, 841 mSDsluCounter, 1556 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 608 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:22:41,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [863 Valid, 2356 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 638 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-12-21 16:22:41,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-12-21 16:22:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 919. [2021-12-21 16:22:41,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 720 states have (on average 1.3736111111111111) internal successors, (989), 724 states have internal predecessors, (989), 147 states have call successors, (147), 48 states have call predecessors, (147), 51 states have return successors, (162), 149 states have call predecessors, (162), 147 states have call successors, (162) [2021-12-21 16:22:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1298 transitions. [2021-12-21 16:22:41,465 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1298 transitions. Word has length 206 [2021-12-21 16:22:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:22:41,466 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1298 transitions. [2021-12-21 16:22:41,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (21), 6 states have call predecessors, (21), 1 states have return successors, (19), 1 states have call predecessors, (19), 1 states have call successors, (19) [2021-12-21 16:22:41,466 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1298 transitions. [2021-12-21 16:22:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-12-21 16:22:41,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:22:41,469 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:22:41,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 16:22:41,469 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:22:41,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:22:41,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1972713921, now seen corresponding path program 1 times [2021-12-21 16:22:41,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:22:41,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012324506] [2021-12-21 16:22:41,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:22:41,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:22:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:22:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:41,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:22:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:22:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:22:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:22:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:41,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 16:22:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 16:22:41,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 16:22:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 16:22:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 16:22:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 16:22:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-21 16:22:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-21 16:22:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-21 16:22:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-21 16:22:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-21 16:22:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-12-21 16:22:41,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:22:41,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012324506] [2021-12-21 16:22:41,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012324506] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:22:41,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:22:41,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:22:41,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055477018] [2021-12-21 16:22:41,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:22:41,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:22:41,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:22:41,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:22:41,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:22:41,831 INFO L87 Difference]: Start difference. First operand 919 states and 1298 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (21), 6 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-21 16:22:44,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:22:45,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:22:45,694 INFO L93 Difference]: Finished difference Result 2159 states and 3154 transitions. [2021-12-21 16:22:45,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:22:45,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (21), 6 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 206 [2021-12-21 16:22:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:22:45,711 INFO L225 Difference]: With dead ends: 2159 [2021-12-21 16:22:45,711 INFO L226 Difference]: Without dead ends: 2157 [2021-12-21 16:22:45,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 16:22:45,712 INFO L933 BasicCegarLoop]: 889 mSDtfsCounter, 1897 mSDsluCounter, 1624 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 976 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2004 SdHoareTripleChecker+Valid, 2513 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 976 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-21 16:22:45,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2004 Valid, 2513 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [976 Valid, 1036 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-12-21 16:22:45,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2021-12-21 16:22:45,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1743. [2021-12-21 16:22:45,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1371 states have (on average 1.3822027716994894) internal successors, (1895), 1379 states have internal predecessors, (1895), 274 states have call successors, (274), 94 states have call predecessors, (274), 97 states have return successors, (293), 275 states have call predecessors, (293), 274 states have call successors, (293) [2021-12-21 16:22:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 2462 transitions. [2021-12-21 16:22:45,773 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 2462 transitions. Word has length 206 [2021-12-21 16:22:45,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:22:45,773 INFO L470 AbstractCegarLoop]: Abstraction has 1743 states and 2462 transitions. [2021-12-21 16:22:45,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (21), 6 states have call predecessors, (21), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-21 16:22:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 2462 transitions. [2021-12-21 16:22:45,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-21 16:22:45,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:22:45,776 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:22:45,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 16:22:45,777 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:22:45,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:22:45,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1543788893, now seen corresponding path program 1 times [2021-12-21 16:22:45,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:22:45,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656744141] [2021-12-21 16:22:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:22:45,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:22:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:22:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:45,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:22:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:22:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:22:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:45,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:22:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 16:22:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 16:22:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 16:22:45,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 16:22:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 16:22:45,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 16:22:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-21 16:22:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-21 16:22:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-21 16:22:45,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:45,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:46,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-21 16:22:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:46,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:46,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:46,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 201 [2021-12-21 16:22:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2021-12-21 16:22:46,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:22:46,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656744141] [2021-12-21 16:22:46,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656744141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:22:46,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:22:46,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:22:46,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18597489] [2021-12-21 16:22:46,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:22:46,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:22:46,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:22:46,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:22:46,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:22:46,017 INFO L87 Difference]: Start difference. First operand 1743 states and 2462 transitions. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (19), 6 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-21 16:22:48,717 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:22:49,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:22:49,837 INFO L93 Difference]: Finished difference Result 4583 states and 6633 transitions. [2021-12-21 16:22:49,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:22:49,837 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (19), 6 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 215 [2021-12-21 16:22:49,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:22:49,849 INFO L225 Difference]: With dead ends: 4583 [2021-12-21 16:22:49,849 INFO L226 Difference]: Without dead ends: 2877 [2021-12-21 16:22:49,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 16:22:49,855 INFO L933 BasicCegarLoop]: 1024 mSDtfsCounter, 1046 mSDsluCounter, 1971 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 684 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 2995 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-21 16:22:49,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1089 Valid, 2995 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 1268 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-12-21 16:22:49,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2021-12-21 16:22:49,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2249. [2021-12-21 16:22:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 1781 states have (on average 1.3722627737226278) internal successors, (2444), 1791 states have internal predecessors, (2444), 334 states have call successors, (334), 130 states have call predecessors, (334), 133 states have return successors, (352), 335 states have call predecessors, (352), 334 states have call successors, (352) [2021-12-21 16:22:49,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 3130 transitions. [2021-12-21 16:22:49,947 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 3130 transitions. Word has length 215 [2021-12-21 16:22:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:22:49,948 INFO L470 AbstractCegarLoop]: Abstraction has 2249 states and 3130 transitions. [2021-12-21 16:22:49,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 3 states have internal predecessors, (84), 2 states have call successors, (19), 6 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-21 16:22:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 3130 transitions. [2021-12-21 16:22:49,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-12-21 16:22:49,952 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:22:49,952 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:22:49,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 16:22:49,953 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:22:49,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:22:49,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1934647390, now seen corresponding path program 1 times [2021-12-21 16:22:49,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:22:49,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110522410] [2021-12-21 16:22:49,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:22:49,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:22:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:22:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:22:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:22:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:22:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:22:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 16:22:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 16:22:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 16:22:50,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 16:22:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 16:22:50,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 16:22:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-21 16:22:50,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-21 16:22:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-21 16:22:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-21 16:22:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:50,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-12-21 16:22:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2021-12-21 16:22:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-12-21 16:22:50,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:22:50,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110522410] [2021-12-21 16:22:50,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110522410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:22:50,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:22:50,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 16:22:50,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644756616] [2021-12-21 16:22:50,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:22:50,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:22:50,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:22:50,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:22:50,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:22:50,204 INFO L87 Difference]: Start difference. First operand 2249 states and 3130 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (21), 6 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-21 16:22:52,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:22:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:22:54,108 INFO L93 Difference]: Finished difference Result 6703 states and 9509 transitions. [2021-12-21 16:22:54,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 16:22:54,108 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (21), 6 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 236 [2021-12-21 16:22:54,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:22:54,123 INFO L225 Difference]: With dead ends: 6703 [2021-12-21 16:22:54,123 INFO L226 Difference]: Without dead ends: 4491 [2021-12-21 16:22:54,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-12-21 16:22:54,128 INFO L933 BasicCegarLoop]: 1201 mSDtfsCounter, 1548 mSDsluCounter, 2740 mSDsCounter, 0 mSdLazyCounter, 1336 mSolverCounterSat, 937 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1578 SdHoareTripleChecker+Valid, 3941 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 937 IncrementalHoareTripleChecker+Valid, 1336 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-21 16:22:54,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1578 Valid, 3941 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [937 Valid, 1336 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-12-21 16:22:54,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2021-12-21 16:22:54,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 2253. [2021-12-21 16:22:54,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2253 states, 1785 states have (on average 1.3714285714285714) internal successors, (2448), 1795 states have internal predecessors, (2448), 334 states have call successors, (334), 130 states have call predecessors, (334), 133 states have return successors, (352), 335 states have call predecessors, (352), 334 states have call successors, (352) [2021-12-21 16:22:54,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2253 states to 2253 states and 3134 transitions. [2021-12-21 16:22:54,229 INFO L78 Accepts]: Start accepts. Automaton has 2253 states and 3134 transitions. Word has length 236 [2021-12-21 16:22:54,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:22:54,230 INFO L470 AbstractCegarLoop]: Abstraction has 2253 states and 3134 transitions. [2021-12-21 16:22:54,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 4 states have internal predecessors, (94), 2 states have call successors, (21), 6 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-21 16:22:54,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2253 states and 3134 transitions. [2021-12-21 16:22:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-21 16:22:54,233 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:22:54,233 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:22:54,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 16:22:54,234 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:22:54,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:22:54,234 INFO L85 PathProgramCache]: Analyzing trace with hash -902031644, now seen corresponding path program 1 times [2021-12-21 16:22:54,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:22:54,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030023399] [2021-12-21 16:22:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:22:54,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:22:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:22:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:22:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:22:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:22:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:22:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 16:22:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 16:22:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 16:22:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 16:22:54,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 16:22:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 16:22:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-21 16:22:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:54,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:54,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-21 16:22:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-21 16:22:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-21 16:22:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:22:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-12-21 16:22:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:22:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2021-12-21 16:22:54,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:22:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-12-21 16:22:54,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:22:54,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030023399] [2021-12-21 16:22:54,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030023399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:22:54,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:22:54,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:22:54,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160486437] [2021-12-21 16:22:54,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:22:54,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:22:54,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:22:54,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:22:54,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:22:54,491 INFO L87 Difference]: Start difference. First operand 2253 states and 3134 transitions. Second operand has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (21), 6 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-21 16:22:56,291 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:22:58,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:23:00,342 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:23:02,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:23:04,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:23:06,694 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:23:08,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:23:10,810 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:23:12,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:23:14,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:23:16,958 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:23:17,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:23:17,659 INFO L93 Difference]: Finished difference Result 5839 states and 8332 transitions. [2021-12-21 16:23:17,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:23:17,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (21), 6 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 242 [2021-12-21 16:23:17,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:23:17,671 INFO L225 Difference]: With dead ends: 5839 [2021-12-21 16:23:17,671 INFO L226 Difference]: Without dead ends: 3623 [2021-12-21 16:23:17,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-21 16:23:17,675 INFO L933 BasicCegarLoop]: 1060 mSDtfsCounter, 1182 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 741 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1239 SdHoareTripleChecker+Valid, 2563 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:23:17,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1239 Valid, 2563 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [741 Valid, 1069 Invalid, 9 Unknown, 0 Unchecked, 23.0s Time] [2021-12-21 16:23:17,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-12-21 16:23:17,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 2811. [2021-12-21 16:23:17,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2811 states, 2234 states have (on average 1.3625783348254252) internal successors, (3044), 2247 states have internal predecessors, (3044), 398 states have call successors, (398), 172 states have call predecessors, (398), 178 states have return successors, (422), 401 states have call predecessors, (422), 398 states have call successors, (422) [2021-12-21 16:23:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 3864 transitions. [2021-12-21 16:23:17,780 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 3864 transitions. Word has length 242 [2021-12-21 16:23:17,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:23:17,781 INFO L470 AbstractCegarLoop]: Abstraction has 2811 states and 3864 transitions. [2021-12-21 16:23:17,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.285714285714286) internal successors, (100), 3 states have internal predecessors, (100), 2 states have call successors, (21), 6 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-21 16:23:17,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 3864 transitions. [2021-12-21 16:23:17,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-12-21 16:23:17,785 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:23:17,786 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:23:17,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 16:23:17,786 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:23:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:23:17,786 INFO L85 PathProgramCache]: Analyzing trace with hash 256272985, now seen corresponding path program 1 times [2021-12-21 16:23:17,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:23:17,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200090123] [2021-12-21 16:23:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:23:17,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:23:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:17,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:23:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:17,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:17,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:23:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:17,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:23:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:17,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:23:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:17,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:23:17,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:17,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:17,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:23:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:17,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:23:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:17,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:17,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:23:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:17,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 16:23:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 16:23:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 16:23:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 16:23:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 16:23:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 16:23:18,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-21 16:23:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:23:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-21 16:23:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-21 16:23:18,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:23:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-21 16:23:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:23:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-12-21 16:23:18,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2021-12-21 16:23:18,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2021-12-21 16:23:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2021-12-21 16:23:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2021-12-21 16:23:18,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:23:18,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200090123] [2021-12-21 16:23:18,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200090123] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:23:18,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:23:18,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:23:18,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286918118] [2021-12-21 16:23:18,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:23:18,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:23:18,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:23:18,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:23:18,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:23:18,112 INFO L87 Difference]: Start difference. First operand 2811 states and 3864 transitions. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (25), 6 states have call predecessors, (25), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-12-21 16:23:20,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:23:21,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:23:21,217 INFO L93 Difference]: Finished difference Result 6395 states and 9011 transitions. [2021-12-21 16:23:21,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 16:23:21,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (25), 6 states have call predecessors, (25), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) Word has length 285 [2021-12-21 16:23:21,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:23:21,229 INFO L225 Difference]: With dead ends: 6395 [2021-12-21 16:23:21,229 INFO L226 Difference]: Without dead ends: 3621 [2021-12-21 16:23:21,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-21 16:23:21,235 INFO L933 BasicCegarLoop]: 747 mSDtfsCounter, 1433 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 752 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 1540 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 752 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-21 16:23:21,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 1540 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [752 Valid, 497 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2021-12-21 16:23:21,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3621 states. [2021-12-21 16:23:21,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3621 to 2749. [2021-12-21 16:23:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2184 states have (on average 1.3191391941391941) internal successors, (2881), 2197 states have internal predecessors, (2881), 390 states have call successors, (390), 172 states have call predecessors, (390), 174 states have return successors, (398), 389 states have call predecessors, (398), 390 states have call successors, (398) [2021-12-21 16:23:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 3669 transitions. [2021-12-21 16:23:21,353 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 3669 transitions. Word has length 285 [2021-12-21 16:23:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:23:21,353 INFO L470 AbstractCegarLoop]: Abstraction has 2749 states and 3669 transitions. [2021-12-21 16:23:21,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (25), 6 states have call predecessors, (25), 1 states have return successors, (24), 3 states have call predecessors, (24), 3 states have call successors, (24) [2021-12-21 16:23:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 3669 transitions. [2021-12-21 16:23:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-12-21 16:23:21,358 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:23:21,358 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:23:21,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 16:23:21,358 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_check_ttyErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:23:21,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:23:21,359 INFO L85 PathProgramCache]: Analyzing trace with hash -724120619, now seen corresponding path program 1 times [2021-12-21 16:23:21,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:23:21,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124901296] [2021-12-21 16:23:21,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:23:21,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:23:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:23:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:23:21,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:23:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:23:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:23:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:23:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:23:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:23:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 16:23:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 16:23:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 16:23:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-21 16:23:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-21 16:23:21,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-21 16:23:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-21 16:23:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:23:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-21 16:23:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-21 16:23:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:23:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-21 16:23:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 16:23:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2021-12-21 16:23:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2021-12-21 16:23:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2021-12-21 16:23:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:23:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2021-12-21 16:23:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:23:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2021-12-21 16:23:21,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:23:21,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124901296] [2021-12-21 16:23:21,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124901296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:23:21,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:23:21,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 16:23:21,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057768308] [2021-12-21 16:23:21,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:23:21,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:23:21,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:23:21,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:23:21,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:23:21,626 INFO L87 Difference]: Start difference. First operand 2749 states and 3669 transitions. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 4 states have internal predecessors, (115), 2 states have call successors, (25), 6 states have call predecessors, (25), 1 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-12-21 16:23:23,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:23:25,280 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:23:27,315 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []