./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.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-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.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 f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 16:12:44,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 16:12:44,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 16:12:44,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 16:12:44,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 16:12:44,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 16:12:44,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 16:12:44,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 16:12:44,539 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 16:12:44,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 16:12:44,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 16:12:44,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 16:12:44,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 16:12:44,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 16:12:44,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 16:12:44,548 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 16:12:44,549 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 16:12:44,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 16:12:44,552 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 16:12:44,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 16:12:44,558 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 16:12:44,559 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 16:12:44,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 16:12:44,560 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 16:12:44,565 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 16:12:44,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 16:12:44,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 16:12:44,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 16:12:44,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 16:12:44,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 16:12:44,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 16:12:44,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 16:12:44,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 16:12:44,570 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 16:12:44,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 16:12:44,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 16:12:44,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 16:12:44,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 16:12:44,572 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 16:12:44,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 16:12:44,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 16:12:44,575 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 16:12:44,597 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 16:12:44,598 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 16:12:44,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 16:12:44,599 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 16:12:44,599 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 16:12:44,599 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 16:12:44,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 16:12:44,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 16:12:44,600 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 16:12:44,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 16:12:44,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 16:12:44,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 16:12:44,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 16:12:44,602 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 16:12:44,602 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 16:12:44,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 16:12:44,602 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 16:12:44,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 16:12:44,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 16:12:44,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 16:12:44,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 16:12:44,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:12:44,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 16:12:44,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 16:12:44,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 16:12:44,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 16:12:44,604 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 16:12:44,605 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 16:12:44,605 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 16:12:44,605 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 16:12:44,605 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 16:12:44,605 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-12-21 16:12:44,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 16:12:44,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 16:12:44,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 16:12:44,916 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 16:12:44,916 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 16:12:44,917 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-12-21 16:12:44,970 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bbc169f3/c27fbdb72d8145d998568c5b12445d4b/FLAGd9de83e96 [2021-12-21 16:12:45,518 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 16:12:45,519 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-12-21 16:12:45,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bbc169f3/c27fbdb72d8145d998568c5b12445d4b/FLAGd9de83e96 [2021-12-21 16:12:46,005 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bbc169f3/c27fbdb72d8145d998568c5b12445d4b [2021-12-21 16:12:46,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 16:12:46,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 16:12:46,010 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 16:12:46,010 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 16:12:46,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 16:12:46,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:12:46" (1/1) ... [2021-12-21 16:12:46,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@db381a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:12:46, skipping insertion in model container [2021-12-21 16:12:46,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:12:46" (1/1) ... [2021-12-21 16:12:46,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 16:12:46,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 16:12:46,638 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-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-12-21 16:12:46,939 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:12:46,952 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 16:12:47,059 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-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-12-21 16:12:47,159 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:12:47,221 INFO L208 MainTranslator]: Completed translation [2021-12-21 16:12:47,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:12:47 WrapperNode [2021-12-21 16:12:47,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 16:12:47,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 16:12:47,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 16:12:47,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 16:12:47,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:12:47" (1/1) ... [2021-12-21 16:12:47,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:12:47" (1/1) ... [2021-12-21 16:12:47,372 INFO L137 Inliner]: procedures = 180, calls = 578, calls flagged for inlining = 99, calls inlined = 93, statements flattened = 2364 [2021-12-21 16:12:47,373 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 16:12:47,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 16:12:47,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 16:12:47,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 16:12:47,380 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:12:47" (1/1) ... [2021-12-21 16:12:47,380 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:12:47" (1/1) ... [2021-12-21 16:12:47,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:12:47" (1/1) ... [2021-12-21 16:12:47,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:12:47" (1/1) ... [2021-12-21 16:12:47,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:12:47" (1/1) ... [2021-12-21 16:12:47,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:12:47" (1/1) ... [2021-12-21 16:12:47,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:12:47" (1/1) ... [2021-12-21 16:12:47,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 16:12:47,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 16:12:47,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 16:12:47,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 16:12:47,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:12:47" (1/1) ... [2021-12-21 16:12:47,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:12:47,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:47,545 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 16:12:47,553 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 16:12:47,580 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-12-21 16:12:47,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-12-21 16:12:47,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-21 16:12:47,580 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_push [2021-12-21 16:12:47,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_push [2021-12-21 16:12:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-12-21 16:12:47,581 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-12-21 16:12:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-21 16:12:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-21 16:12:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-21 16:12:47,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-21 16:12:47,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 16:12:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure crc_ccitt_byte [2021-12-21 16:12:47,582 INFO L138 BoogieDeclarations]: Found implementation of procedure crc_ccitt_byte [2021-12-21 16:12:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure ap_put [2021-12-21 16:12:47,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_put [2021-12-21 16:12:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_output_wakeup [2021-12-21 16:12:47,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_output_wakeup [2021-12-21 16:12:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-21 16:12:47,582 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-21 16:12:47,583 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-12-21 16:12:47,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-12-21 16:12:47,583 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 16:12:47,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 16:12:47,583 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_hangup [2021-12-21 16:12:47,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_hangup [2021-12-21 16:12:47,583 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-12-21 16:12:47,583 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-12-21 16:12:47,584 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2021-12-21 16:12:47,584 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2021-12-21 16:12:47,584 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_be16 [2021-12-21 16:12:47,584 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_be16 [2021-12-21 16:12:47,584 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-12-21 16:12:47,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-12-21 16:12:47,584 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-21 16:12:47,584 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-21 16:12:47,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 16:12:47,585 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-21 16:12:47,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-21 16:12:47,585 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-21 16:12:47,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-21 16:12:47,586 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-12-21 16:12:47,586 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-12-21 16:12:47,586 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 16:12:47,586 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 16:12:47,586 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_close [2021-12-21 16:12:47,586 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_close [2021-12-21 16:12:47,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 16:12:47,586 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_poll [2021-12-21 16:12:47,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_poll [2021-12-21 16:12:47,587 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-12-21 16:12:47,587 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-12-21 16:12:47,587 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-21 16:12:47,587 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-21 16:12:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 16:12:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 16:12:47,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 16:12:47,589 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-12-21 16:12:47,589 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-12-21 16:12:47,589 INFO L130 BoogieDeclarations]: Found specification of procedure ap_get [2021-12-21 16:12:47,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_get [2021-12-21 16:12:47,590 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-12-21 16:12:47,590 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-12-21 16:12:47,590 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 16:12:47,590 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-12-21 16:12:47,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-12-21 16:12:47,590 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2021-12-21 16:12:47,590 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2021-12-21 16:12:47,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 16:12:47,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 16:12:47,591 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-21 16:12:47,591 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-21 16:12:47,591 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-12-21 16:12:47,591 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-12-21 16:12:47,591 INFO L130 BoogieDeclarations]: Found specification of procedure async_lcp_peek [2021-12-21 16:12:47,591 INFO L138 BoogieDeclarations]: Found implementation of procedure async_lcp_peek [2021-12-21 16:12:47,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 16:12:47,592 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-12-21 16:12:47,592 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-12-21 16:12:47,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-21 16:12:47,592 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-21 16:12:47,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-21 16:12:47,593 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-21 16:12:47,593 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-21 16:12:47,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 16:12:47,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 16:12:47,593 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_ioctl [2021-12-21 16:12:47,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_ioctl [2021-12-21 16:12:47,593 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-12-21 16:12:47,594 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-12-21 16:12:47,993 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 16:12:47,995 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 16:12:48,288 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-21 16:12:51,210 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 16:12:51,224 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 16:12:51,224 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 16:12:51,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:12:51 BoogieIcfgContainer [2021-12-21 16:12:51,227 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 16:12:51,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 16:12:51,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 16:12:51,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 16:12:51,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:12:46" (1/3) ... [2021-12-21 16:12:51,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3747e066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:12:51, skipping insertion in model container [2021-12-21 16:12:51,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:12:47" (2/3) ... [2021-12-21 16:12:51,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3747e066 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:12:51, skipping insertion in model container [2021-12-21 16:12:51,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:12:51" (3/3) ... [2021-12-21 16:12:51,248 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-12-21 16:12:51,252 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 16:12:51,252 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 16:12:51,285 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 16:12:51,305 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 16:12:51,305 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 16:12:51,335 INFO L276 IsEmpty]: Start isEmpty. Operand has 723 states, 569 states have (on average 1.437609841827768) internal successors, (818), 583 states have internal predecessors, (818), 116 states have call successors, (116), 37 states have call predecessors, (116), 36 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2021-12-21 16:12:51,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-21 16:12:51,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:51,352 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:12:51,353 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:51,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:51,360 INFO L85 PathProgramCache]: Analyzing trace with hash 678107625, now seen corresponding path program 1 times [2021-12-21 16:12:51,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:51,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016527384] [2021-12-21 16:12:51,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:51,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:51,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:51,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:12:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:51,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:12:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:51,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:12:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:51,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:12:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:51,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:12:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:51,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:12:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:51,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 16:12:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:51,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 16:12:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:51,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 16:12:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-21 16:12:51,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:51,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016527384] [2021-12-21 16:12:51,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016527384] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:12:51,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:12:51,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:12:51,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138731551] [2021-12-21 16:12:51,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:12:51,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:12:51,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:51,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:12:51,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:12:51,792 INFO L87 Difference]: Start difference. First operand has 723 states, 569 states have (on average 1.437609841827768) internal successors, (818), 583 states have internal predecessors, (818), 116 states have call successors, (116), 37 states have call predecessors, (116), 36 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-21 16:12:54,841 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 16:12:55,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:55,263 INFO L93 Difference]: Finished difference Result 2286 states and 3408 transitions. [2021-12-21 16:12:55,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:12:55,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 78 [2021-12-21 16:12:55,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:55,286 INFO L225 Difference]: With dead ends: 2286 [2021-12-21 16:12:55,287 INFO L226 Difference]: Without dead ends: 1552 [2021-12-21 16:12:55,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:12:55,306 INFO L933 BasicCegarLoop]: 1106 mSDtfsCounter, 1440 mSDsluCounter, 1200 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 307 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1534 SdHoareTripleChecker+Valid, 2306 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:55,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1534 Valid, 2306 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 790 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-12-21 16:12:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-12-21 16:12:55,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1380. [2021-12-21 16:12:55,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1098 states have (on average 1.424408014571949) internal successors, (1564), 1114 states have internal predecessors, (1564), 211 states have call successors, (211), 71 states have call predecessors, (211), 70 states have return successors, (210), 210 states have call predecessors, (210), 210 states have call successors, (210) [2021-12-21 16:12:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 1985 transitions. [2021-12-21 16:12:55,435 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 1985 transitions. Word has length 78 [2021-12-21 16:12:55,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:55,435 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 1985 transitions. [2021-12-21 16:12:55,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-21 16:12:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 1985 transitions. [2021-12-21 16:12:55,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-21 16:12:55,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:55,439 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:12:55,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 16:12:55,440 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:55,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:55,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1376133839, now seen corresponding path program 1 times [2021-12-21 16:12:55,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:55,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101687060] [2021-12-21 16:12:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:55,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:55,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:55,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:55,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:55,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:12:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:55,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:12:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:55,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:12:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:55,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:12:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:55,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:12:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:55,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:12:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:55,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 16:12:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:55,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 16:12:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:55,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 16:12:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:55,579 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-21 16:12:55,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:55,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101687060] [2021-12-21 16:12:55,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101687060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:12:55,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:12:55,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 16:12:55,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3631388] [2021-12-21 16:12:55,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:12:55,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:12:55,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:55,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:12:55,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:12:55,608 INFO L87 Difference]: Start difference. First operand 1380 states and 1985 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-21 16:12:59,036 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 16:12:59,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:59,313 INFO L93 Difference]: Finished difference Result 4425 states and 6457 transitions. [2021-12-21 16:12:59,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:12:59,313 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 82 [2021-12-21 16:12:59,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:59,325 INFO L225 Difference]: With dead ends: 4425 [2021-12-21 16:12:59,326 INFO L226 Difference]: Without dead ends: 3063 [2021-12-21 16:12:59,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:12:59,331 INFO L933 BasicCegarLoop]: 1095 mSDtfsCounter, 1460 mSDsluCounter, 2926 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 311 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1559 SdHoareTripleChecker+Valid, 4021 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:59,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1559 Valid, 4021 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 1407 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-12-21 16:12:59,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3063 states. [2021-12-21 16:12:59,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3063 to 2799. [2021-12-21 16:12:59,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2799 states, 2229 states have (on average 1.4262000897263347) internal successors, (3179), 2267 states have internal predecessors, (3179), 421 states have call successors, (421), 141 states have call predecessors, (421), 148 states have return successors, (464), 422 states have call predecessors, (464), 420 states have call successors, (464) [2021-12-21 16:12:59,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2799 states to 2799 states and 4064 transitions. [2021-12-21 16:12:59,422 INFO L78 Accepts]: Start accepts. Automaton has 2799 states and 4064 transitions. Word has length 82 [2021-12-21 16:12:59,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:59,424 INFO L470 AbstractCegarLoop]: Abstraction has 2799 states and 4064 transitions. [2021-12-21 16:12:59,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-21 16:12:59,425 INFO L276 IsEmpty]: Start isEmpty. Operand 2799 states and 4064 transitions. [2021-12-21 16:12:59,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-21 16:12:59,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:59,436 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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] [2021-12-21 16:12:59,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 16:12:59,439 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:59,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:59,440 INFO L85 PathProgramCache]: Analyzing trace with hash -2115293044, now seen corresponding path program 1 times [2021-12-21 16:12:59,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:59,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791795411] [2021-12-21 16:12:59,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:59,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:59,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:12:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:12:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:12:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:12:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:12:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:12:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 16:12:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 16:12:59,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 16:12:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-21 16:12:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 16:12:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 16:12:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:12:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 16:12:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-21 16:12:59,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:59,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791795411] [2021-12-21 16:12:59,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791795411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:12:59,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:12:59,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:12:59,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643917789] [2021-12-21 16:12:59,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:12:59,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:12:59,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:59,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:12:59,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:12:59,671 INFO L87 Difference]: Start difference. First operand 2799 states and 4064 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, (17), 6 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 16:13:03,288 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 16:13:05,311 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 16:13:05,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:13:05,512 INFO L93 Difference]: Finished difference Result 7425 states and 10855 transitions. [2021-12-21 16:13:05,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 16:13:05,513 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, (17), 6 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 140 [2021-12-21 16:13:05,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:13:05,531 INFO L225 Difference]: With dead ends: 7425 [2021-12-21 16:13:05,532 INFO L226 Difference]: Without dead ends: 4650 [2021-12-21 16:13:05,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-21 16:13:05,544 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 1955 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 768 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2028 SdHoareTripleChecker+Valid, 2422 SdHoareTripleChecker+Invalid, 2063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 768 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:13:05,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2028 Valid, 2422 Invalid, 2063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [768 Valid, 1293 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2021-12-21 16:13:05,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4650 states. [2021-12-21 16:13:05,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4650 to 4161. [2021-12-21 16:13:05,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4161 states, 3313 states have (on average 1.43284032598853) internal successors, (4747), 3367 states have internal predecessors, (4747), 613 states have call successors, (613), 213 states have call predecessors, (613), 234 states have return successors, (696), 618 states have call predecessors, (696), 612 states have call successors, (696) [2021-12-21 16:13:05,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4161 states to 4161 states and 6056 transitions. [2021-12-21 16:13:05,707 INFO L78 Accepts]: Start accepts. Automaton has 4161 states and 6056 transitions. Word has length 140 [2021-12-21 16:13:05,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:13:05,709 INFO L470 AbstractCegarLoop]: Abstraction has 4161 states and 6056 transitions. [2021-12-21 16:13:05,709 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, (17), 6 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 16:13:05,709 INFO L276 IsEmpty]: Start isEmpty. Operand 4161 states and 6056 transitions. [2021-12-21 16:13:05,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-21 16:13:05,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:13:05,719 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 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] [2021-12-21 16:13:05,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 16:13:05,720 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:13:05,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:13:05,720 INFO L85 PathProgramCache]: Analyzing trace with hash 840633849, now seen corresponding path program 1 times [2021-12-21 16:13:05,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:13:05,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351375876] [2021-12-21 16:13:05,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:13:05,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:13:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:13:05,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:13:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:13:05,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:13:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:13:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:13:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:13:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 16:13:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 16:13:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 16:13:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-21 16:13:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:13:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:13:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-21 16:13:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:13:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-21 16:13:05,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 16:13:05,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:13:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-21 16:13:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:13:05,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:13:05,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 16:13:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-21 16:13:05,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:13:05,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351375876] [2021-12-21 16:13:05,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351375876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:13:05,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:13:05,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:13:05,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870447171] [2021-12-21 16:13:05,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:13:05,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:13:05,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:13:05,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:13:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:13:05,942 INFO L87 Difference]: Start difference. First operand 4161 states and 6056 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-21 16:13:09,495 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 16:13:11,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:13:13,581 WARN L534 Checker$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 16:13:15,609 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 16:13:15,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:13:15,831 INFO L93 Difference]: Finished difference Result 10882 states and 15769 transitions. [2021-12-21 16:13:15,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 16:13:15,831 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 169 [2021-12-21 16:13:15,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:13:15,855 INFO L225 Difference]: With dead ends: 10882 [2021-12-21 16:13:15,856 INFO L226 Difference]: Without dead ends: 6745 [2021-12-21 16:13:15,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:13:15,867 INFO L933 BasicCegarLoop]: 1466 mSDtfsCounter, 1247 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 371 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1302 SdHoareTripleChecker+Valid, 3420 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-12-21 16:13:15,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1302 Valid, 3420 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 1334 Invalid, 4 Unknown, 0 Unchecked, 9.7s Time] [2021-12-21 16:13:15,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6745 states. [2021-12-21 16:13:16,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6745 to 6110. [2021-12-21 16:13:16,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6110 states, 4891 states have (on average 1.418523819259865) internal successors, (6938), 4975 states have internal predecessors, (6938), 848 states have call successors, (848), 335 states have call predecessors, (848), 370 states have return successors, (977), 859 states have call predecessors, (977), 847 states have call successors, (977) [2021-12-21 16:13:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6110 states to 6110 states and 8763 transitions. [2021-12-21 16:13:16,098 INFO L78 Accepts]: Start accepts. Automaton has 6110 states and 8763 transitions. Word has length 169 [2021-12-21 16:13:16,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:13:16,098 INFO L470 AbstractCegarLoop]: Abstraction has 6110 states and 8763 transitions. [2021-12-21 16:13:16,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-21 16:13:16,099 INFO L276 IsEmpty]: Start isEmpty. Operand 6110 states and 8763 transitions. [2021-12-21 16:13:16,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-21 16:13:16,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:13:16,117 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 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] [2021-12-21 16:13:16,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 16:13:16,117 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:13:16,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:13:16,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1912369058, now seen corresponding path program 1 times [2021-12-21 16:13:16,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:13:16,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122195999] [2021-12-21 16:13:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:13:16,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:13:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:13:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:13:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:13:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:13:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:13:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:13:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:13:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 16:13:16,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 16:13:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 16:13:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 16:13:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 16:13:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-21 16:13:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 16:13:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 16:13:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:13:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:13:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:13:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 16:13:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-12-21 16:13:16,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:13:16,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122195999] [2021-12-21 16:13:16,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122195999] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:13:16,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:13:16,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:13:16,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367341615] [2021-12-21 16:13:16,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:13:16,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:13:16,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:13:16,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:13:16,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:13:16,307 INFO L87 Difference]: Start difference. First operand 6110 states and 8763 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 3 states have internal predecessors, (85), 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 16:13:20,305 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 16:13:22,323 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 16:13:22,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:13:22,409 INFO L93 Difference]: Finished difference Result 15870 states and 22783 transitions. [2021-12-21 16:13:22,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 16:13:22,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 3 states have internal predecessors, (85), 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 163 [2021-12-21 16:13:22,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:13:22,535 INFO L225 Difference]: With dead ends: 15870 [2021-12-21 16:13:22,536 INFO L226 Difference]: Without dead ends: 9795 [2021-12-21 16:13:22,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-21 16:13:22,548 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 2851 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 1131 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2927 SdHoareTripleChecker+Valid, 2436 SdHoareTripleChecker+Invalid, 2535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1131 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-21 16:13:22,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2927 Valid, 2436 Invalid, 2535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1131 Valid, 1402 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2021-12-21 16:13:22,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9795 states. [2021-12-21 16:13:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9795 to 8838. [2021-12-21 16:13:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8838 states, 7071 states have (on average 1.410550134351577) internal successors, (9974), 7191 states have internal predecessors, (9974), 1184 states have call successors, (1184), 525 states have call predecessors, (1184), 582 states have return successors, (1368), 1201 states have call predecessors, (1368), 1183 states have call successors, (1368) [2021-12-21 16:13:22,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8838 states to 8838 states and 12526 transitions. [2021-12-21 16:13:22,802 INFO L78 Accepts]: Start accepts. Automaton has 8838 states and 12526 transitions. Word has length 163 [2021-12-21 16:13:22,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:13:22,803 INFO L470 AbstractCegarLoop]: Abstraction has 8838 states and 12526 transitions. [2021-12-21 16:13:22,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 3 states have internal predecessors, (85), 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 16:13:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 8838 states and 12526 transitions. [2021-12-21 16:13:22,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-21 16:13:22,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:13:22,814 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 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] [2021-12-21 16:13:22,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 16:13:22,814 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:13:22,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:13:22,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1253354754, now seen corresponding path program 1 times [2021-12-21 16:13:22,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:13:22,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447102641] [2021-12-21 16:13:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:13:22,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:13:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:22,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:13:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:22,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:13:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:22,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:13:22,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:22,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:13:22,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:22,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:13:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:22,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:13:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:22,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:13:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:22,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 16:13:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:22,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 16:13:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:22,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 16:13:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:22,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 16:13:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:22,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 16:13:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:22,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 16:13:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:22,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:13:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:23,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 16:13:23,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:23,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 16:13:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:23,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:13:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:23,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:13:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:23,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:13:23,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:23,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-21 16:13:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-21 16:13:23,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:13:23,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447102641] [2021-12-21 16:13:23,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447102641] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:13:23,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:13:23,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:13:23,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461521157] [2021-12-21 16:13:23,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:13:23,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:13:23,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:13:23,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:13:23,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:13:23,056 INFO L87 Difference]: Start difference. First operand 8838 states and 12526 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-21 16:13:26,494 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 16:13:28,518 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:13:30,548 WARN L534 Checker$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 16:13:30,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:13:30,611 INFO L93 Difference]: Finished difference Result 14382 states and 20629 transitions. [2021-12-21 16:13:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:13:30,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 168 [2021-12-21 16:13:30,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:13:30,648 INFO L225 Difference]: With dead ends: 14382 [2021-12-21 16:13:30,649 INFO L226 Difference]: Without dead ends: 9802 [2021-12-21 16:13:30,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:13:30,663 INFO L933 BasicCegarLoop]: 936 mSDtfsCounter, 918 mSDsluCounter, 1883 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 449 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 2819 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-12-21 16:13:30,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [951 Valid, 2819 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 1261 Invalid, 3 Unknown, 0 Unchecked, 7.3s Time] [2021-12-21 16:13:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9802 states. [2021-12-21 16:13:30,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9802 to 8858. [2021-12-21 16:13:30,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8858 states, 7091 states have (on average 1.4093921872796502) internal successors, (9994), 7211 states have internal predecessors, (9994), 1184 states have call successors, (1184), 525 states have call predecessors, (1184), 582 states have return successors, (1368), 1201 states have call predecessors, (1368), 1183 states have call successors, (1368) [2021-12-21 16:13:30,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 12546 transitions. [2021-12-21 16:13:30,999 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 12546 transitions. Word has length 168 [2021-12-21 16:13:31,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:13:31,000 INFO L470 AbstractCegarLoop]: Abstraction has 8858 states and 12546 transitions. [2021-12-21 16:13:31,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-21 16:13:31,001 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 12546 transitions. [2021-12-21 16:13:31,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-21 16:13:31,011 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:13:31,011 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 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] [2021-12-21 16:13:31,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 16:13:31,012 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:13:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:13:31,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1255892641, now seen corresponding path program 1 times [2021-12-21 16:13:31,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:13:31,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220802302] [2021-12-21 16:13:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:13:31,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:13:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:13:31,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:13:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:13:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:13:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:13:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:13:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:13:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 16:13:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 16:13:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 16:13:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 16:13:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 16:13:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-21 16:13:31,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:13:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 16:13:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-21 16:13:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:13:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:13:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:13:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-21 16:13:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-12-21 16:13:31,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:13:31,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220802302] [2021-12-21 16:13:31,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220802302] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:13:31,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98966465] [2021-12-21 16:13:31,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:13:31,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:13:31,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:13:31,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:13:31,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 16:13:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:31,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 16:13:31,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:13:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 89 proven. 5 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-21 16:13:32,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:13:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-21 16:13:33,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98966465] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:13:33,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 16:13:33,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 17 [2021-12-21 16:13:33,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739737693] [2021-12-21 16:13:33,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 16:13:33,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 16:13:33,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:13:33,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 16:13:33,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-12-21 16:13:33,045 INFO L87 Difference]: Start difference. First operand 8858 states and 12546 transitions. Second operand has 17 states, 16 states have (on average 11.3125) internal successors, (181), 13 states have internal predecessors, (181), 8 states have call successors, (48), 9 states have call predecessors, (48), 6 states have return successors, (38), 7 states have call predecessors, (38), 8 states have call successors, (38) [2021-12-21 16:13:40,222 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:13:42,246 WARN L534 Checker$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 16:13:45,679 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:13:47,715 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:13:48,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:13:48,339 INFO L93 Difference]: Finished difference Result 25915 states and 37319 transitions. [2021-12-21 16:13:48,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-21 16:13:48,339 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 11.3125) internal successors, (181), 13 states have internal predecessors, (181), 8 states have call successors, (48), 9 states have call predecessors, (48), 6 states have return successors, (38), 7 states have call predecessors, (38), 8 states have call successors, (38) Word has length 170 [2021-12-21 16:13:48,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:13:48,391 INFO L225 Difference]: With dead ends: 25915 [2021-12-21 16:13:48,391 INFO L226 Difference]: Without dead ends: 17092 [2021-12-21 16:13:48,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 378 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-12-21 16:13:48,416 INFO L933 BasicCegarLoop]: 1284 mSDtfsCounter, 6600 mSDsluCounter, 4664 mSDsCounter, 0 mSdLazyCounter, 8033 mSolverCounterSat, 2627 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6734 SdHoareTripleChecker+Valid, 5948 SdHoareTripleChecker+Invalid, 10664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2627 IncrementalHoareTripleChecker+Valid, 8033 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:13:48,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6734 Valid, 5948 Invalid, 10664 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2627 Valid, 8033 Invalid, 4 Unknown, 0 Unchecked, 14.4s Time] [2021-12-21 16:13:48,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17092 states. [2021-12-21 16:13:48,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17092 to 15079. [2021-12-21 16:13:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15079 states, 12027 states have (on average 1.4122391286272553) internal successors, (16985), 12237 states have internal predecessors, (16985), 2108 states have call successors, (2108), 888 states have call predecessors, (2108), 943 states have return successors, (2377), 2103 states have call predecessors, (2377), 2107 states have call successors, (2377) [2021-12-21 16:13:48,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15079 states to 15079 states and 21470 transitions. [2021-12-21 16:13:48,855 INFO L78 Accepts]: Start accepts. Automaton has 15079 states and 21470 transitions. Word has length 170 [2021-12-21 16:13:48,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:13:48,856 INFO L470 AbstractCegarLoop]: Abstraction has 15079 states and 21470 transitions. [2021-12-21 16:13:48,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 11.3125) internal successors, (181), 13 states have internal predecessors, (181), 8 states have call successors, (48), 9 states have call predecessors, (48), 6 states have return successors, (38), 7 states have call predecessors, (38), 8 states have call successors, (38) [2021-12-21 16:13:48,856 INFO L276 IsEmpty]: Start isEmpty. Operand 15079 states and 21470 transitions. [2021-12-21 16:13:48,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-21 16:13:48,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:13:48,869 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 4, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:13:48,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 16:13:49,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:13:49,092 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:13:49,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:13:49,092 INFO L85 PathProgramCache]: Analyzing trace with hash -221570316, now seen corresponding path program 1 times [2021-12-21 16:13:49,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:13:49,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126684476] [2021-12-21 16:13:49,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:13:49,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:13:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:13:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:13:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:13:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:13:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:13:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:13:49,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:13:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-21 16:13:49,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-21 16:13:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 16:13:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 16:13:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 16:13:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-21 16:13:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-21 16:13:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-21 16:13:49,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:13:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-21 16:13:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:13:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:13:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-12-21 16:13:49,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:13:49,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126684476] [2021-12-21 16:13:49,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126684476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:13:49,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:13:49,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 16:13:49,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194960117] [2021-12-21 16:13:49,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:13:49,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:13:49,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:13:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:13:49,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:13:49,353 INFO L87 Difference]: Start difference. First operand 15079 states and 21470 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18)