./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.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-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.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 6063bfeeaa4a025ac67d1a7a9b5cc20b489e34fc9db0d4dd9fcdda86c75b9c5e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 16:20:53,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 16:20:53,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 16:20:53,107 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 16:20:53,107 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 16:20:53,110 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 16:20:53,111 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 16:20:53,114 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 16:20:53,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 16:20:53,120 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 16:20:53,121 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 16:20:53,122 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 16:20:53,122 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 16:20:53,123 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 16:20:53,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 16:20:53,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 16:20:53,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 16:20:53,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 16:20:53,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 16:20:53,132 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 16:20:53,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 16:20:53,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 16:20:53,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 16:20:53,138 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 16:20:53,140 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 16:20:53,142 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 16:20:53,142 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 16:20:53,142 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 16:20:53,143 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 16:20:53,144 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 16:20:53,144 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 16:20:53,145 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 16:20:53,146 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 16:20:53,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 16:20:53,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 16:20:53,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 16:20:53,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 16:20:53,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 16:20:53,148 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 16:20:53,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 16:20:53,149 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 16:20:53,150 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 16:20:53,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 16:20:53,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 16:20:53,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 16:20:53,176 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 16:20:53,177 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 16:20:53,177 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 16:20:53,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 16:20:53,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 16:20:53,178 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 16:20:53,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 16:20:53,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 16:20:53,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 16:20:53,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 16:20:53,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 16:20:53,179 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 16:20:53,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 16:20:53,179 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 16:20:53,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 16:20:53,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 16:20:53,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 16:20:53,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 16:20:53,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:20:53,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 16:20:53,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 16:20:53,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 16:20:53,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 16:20:53,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 16:20:53,182 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 16:20:53,182 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 16:20:53,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 16:20:53,183 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 16:20:53,183 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6063bfeeaa4a025ac67d1a7a9b5cc20b489e34fc9db0d4dd9fcdda86c75b9c5e [2021-12-21 16:20:53,375 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 16:20:53,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 16:20:53,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 16:20:53,397 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 16:20:53,399 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 16:20:53,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i [2021-12-21 16:20:53,454 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5f7f2df1/cfcf2ad5aae34dd0b700f2018181787a/FLAGa5599a093 [2021-12-21 16:20:54,063 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 16:20:54,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i [2021-12-21 16:20:54,094 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5f7f2df1/cfcf2ad5aae34dd0b700f2018181787a/FLAGa5599a093 [2021-12-21 16:20:54,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5f7f2df1/cfcf2ad5aae34dd0b700f2018181787a [2021-12-21 16:20:54,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 16:20:54,486 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 16:20:54,488 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 16:20:54,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 16:20:54,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 16:20:54,492 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:20:54" (1/1) ... [2021-12-21 16:20:54,493 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fe3e603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:54, skipping insertion in model container [2021-12-21 16:20:54,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:20:54" (1/1) ... [2021-12-21 16:20:54,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 16:20:54,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 16:20:54,913 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i[139152,139165] [2021-12-21 16:20:55,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:20:55,444 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 16:20:55,509 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i[139152,139165] [2021-12-21 16:20:55,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:20:55,727 INFO L208 MainTranslator]: Completed translation [2021-12-21 16:20:55,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:55 WrapperNode [2021-12-21 16:20:55,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 16:20:55,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 16:20:55,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 16:20:55,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 16:20:55,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:55" (1/1) ... [2021-12-21 16:20:55,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:55" (1/1) ... [2021-12-21 16:20:55,871 INFO L137 Inliner]: procedures = 184, calls = 828, calls flagged for inlining = 92, calls inlined = 90, statements flattened = 3179 [2021-12-21 16:20:55,872 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 16:20:55,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 16:20:55,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 16:20:55,873 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 16:20:55,879 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:55" (1/1) ... [2021-12-21 16:20:55,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:55" (1/1) ... [2021-12-21 16:20:55,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:55" (1/1) ... [2021-12-21 16:20:55,905 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:55" (1/1) ... [2021-12-21 16:20:55,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:55" (1/1) ... [2021-12-21 16:20:55,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:55" (1/1) ... [2021-12-21 16:20:56,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:55" (1/1) ... [2021-12-21 16:20:56,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 16:20:56,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 16:20:56,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 16:20:56,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 16:20:56,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:55" (1/1) ... [2021-12-21 16:20:56,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:20:56,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:20:56,092 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 16:20:56,128 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 16:20:56,152 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_nonpositive [2021-12-21 16:20:56,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_nonpositive [2021-12-21 16:20:56,152 INFO L130 BoogieDeclarations]: Found specification of procedure sl_tx_timeout [2021-12-21 16:20:56,152 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_tx_timeout [2021-12-21 16:20:56,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-21 16:20:56,153 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-12-21 16:20:56,153 INFO L130 BoogieDeclarations]: Found specification of procedure activate_pending_timer_1 [2021-12-21 16:20:56,153 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_pending_timer_1 [2021-12-21 16:20:56,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-21 16:20:56,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-21 16:20:56,153 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-21 16:20:56,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-21 16:20:56,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 16:20:56,153 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2021-12-21 16:20:56,154 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2021-12-21 16:20:56,154 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-12-21 16:20:56,154 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-12-21 16:20:56,154 INFO L130 BoogieDeclarations]: Found specification of procedure slhc_free [2021-12-21 16:20:56,154 INFO L138 BoogieDeclarations]: Found implementation of procedure slhc_free [2021-12-21 16:20:56,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-21 16:20:56,154 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-21 16:20:56,154 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-12-21 16:20:56,154 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-12-21 16:20:56,155 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 16:20:56,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 16:20:56,155 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-12-21 16:20:56,155 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-12-21 16:20:56,155 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2021-12-21 16:20:56,155 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2021-12-21 16:20:56,155 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-21 16:20:56,155 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-21 16:20:56,156 INFO L130 BoogieDeclarations]: Found specification of procedure sl_free_bufs [2021-12-21 16:20:56,156 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_free_bufs [2021-12-21 16:20:56,156 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 16:20:56,156 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-21 16:20:56,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-21 16:20:56,156 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-21 16:20:56,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-21 16:20:56,157 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-12-21 16:20:56,157 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-12-21 16:20:56,157 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 16:20:56,157 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 16:20:56,157 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-12-21 16:20:56,157 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-12-21 16:20:56,157 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-12-21 16:20:56,157 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-12-21 16:20:56,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 16:20:56,158 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2021-12-21 16:20:56,158 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2021-12-21 16:20:56,158 INFO L130 BoogieDeclarations]: Found specification of procedure sl_bump [2021-12-21 16:20:56,158 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_bump [2021-12-21 16:20:56,158 INFO L130 BoogieDeclarations]: Found specification of procedure slip_ioctl [2021-12-21 16:20:56,158 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_ioctl [2021-12-21 16:20:56,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 16:20:56,159 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2021-12-21 16:20:56,159 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2021-12-21 16:20:56,159 INFO L130 BoogieDeclarations]: Found specification of procedure slip_close [2021-12-21 16:20:56,160 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_close [2021-12-21 16:20:56,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 16:20:56,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 16:20:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-12-21 16:20:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2021-12-21 16:20:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2021-12-21 16:20:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure slip_compat_ioctl [2021-12-21 16:20:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_compat_ioctl [2021-12-21 16:20:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-12-21 16:20:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-12-21 16:20:56,161 INFO L130 BoogieDeclarations]: Found specification of procedure sl_get_stats64 [2021-12-21 16:20:56,161 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_get_stats64 [2021-12-21 16:20:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 16:20:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-12-21 16:20:56,162 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-12-21 16:20:56,162 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-12-21 16:20:56,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-12-21 16:20:56,163 INFO L130 BoogieDeclarations]: Found specification of procedure mod_timer [2021-12-21 16:20:56,163 INFO L138 BoogieDeclarations]: Found implementation of procedure mod_timer [2021-12-21 16:20:56,163 INFO L130 BoogieDeclarations]: Found specification of procedure sl_ioctl [2021-12-21 16:20:56,163 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_ioctl [2021-12-21 16:20:56,163 INFO L130 BoogieDeclarations]: Found specification of procedure tty_hangup [2021-12-21 16:20:56,163 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_hangup [2021-12-21 16:20:56,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 16:20:56,163 INFO L130 BoogieDeclarations]: Found specification of procedure netif_queue_stopped [2021-12-21 16:20:56,163 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_queue_stopped [2021-12-21 16:20:56,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 16:20:56,164 INFO L130 BoogieDeclarations]: Found specification of procedure tty_devnum [2021-12-21 16:20:56,164 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_devnum [2021-12-21 16:20:56,164 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-21 16:20:56,164 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-21 16:20:56,164 INFO L130 BoogieDeclarations]: Found specification of procedure slip_hangup [2021-12-21 16:20:56,165 INFO L138 BoogieDeclarations]: Found implementation of procedure slip_hangup [2021-12-21 16:20:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-21 16:20:56,165 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-21 16:20:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-12-21 16:20:56,165 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-12-21 16:20:56,165 INFO L130 BoogieDeclarations]: Found specification of procedure sl_change_mtu [2021-12-21 16:20:56,166 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_change_mtu [2021-12-21 16:20:56,166 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2021-12-21 16:20:56,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2021-12-21 16:20:56,166 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-12-21 16:20:56,166 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-12-21 16:20:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-12-21 16:20:56,167 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-12-21 16:20:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-12-21 16:20:56,167 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-12-21 16:20:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-21 16:20:56,167 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-21 16:20:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 16:20:56,167 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-12-21 16:20:56,168 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-12-21 16:20:56,168 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_clear_bit [2021-12-21 16:20:56,168 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_clear_bit [2021-12-21 16:20:56,168 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-12-21 16:20:56,168 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-12-21 16:20:56,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-21 16:20:56,168 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-21 16:20:56,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-21 16:20:56,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 16:20:56,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 16:20:56,170 INFO L130 BoogieDeclarations]: Found specification of procedure sl_unlock [2021-12-21 16:20:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_unlock [2021-12-21 16:20:56,171 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-12-21 16:20:56,171 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-12-21 16:20:56,575 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 16:20:56,577 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 16:20:56,689 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-21 16:20:58,222 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 16:20:58,233 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 16:20:58,233 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 16:20:58,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:20:58 BoogieIcfgContainer [2021-12-21 16:20:58,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 16:20:58,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 16:20:58,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 16:20:58,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 16:20:58,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:20:54" (1/3) ... [2021-12-21 16:20:58,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b71de1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:20:58, skipping insertion in model container [2021-12-21 16:20:58,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:20:55" (2/3) ... [2021-12-21 16:20:58,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b71de1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:20:58, skipping insertion in model container [2021-12-21 16:20:58,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:20:58" (3/3) ... [2021-12-21 16:20:58,242 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-1b0b0ac-1-108_1a-drivers--net--slip.ko-entry_point.cil.out.i [2021-12-21 16:20:58,245 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 16:20:58,246 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 16:20:58,280 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 16:20:58,284 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 16:20:58,285 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 16:20:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand has 1086 states, 804 states have (on average 1.4291044776119404) internal successors, (1149), 837 states have internal predecessors, (1149), 229 states have call successors, (229), 52 states have call predecessors, (229), 51 states have return successors, (224), 222 states have call predecessors, (224), 224 states have call successors, (224) [2021-12-21 16:20:58,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-21 16:20:58,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:20:58,340 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:20:58,340 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:20:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:20:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1674136558, now seen corresponding path program 1 times [2021-12-21 16:20:58,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:20:58,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292402801] [2021-12-21 16:20:58,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:20:58,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:20:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:20:58,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:20:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:20:58,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:20:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:20:58,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:20:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:20:58,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:20:58,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:20:58,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:20:58,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:20:58,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:20:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:20:58,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:20:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:20:58,853 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-21 16:20:58,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:20:58,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292402801] [2021-12-21 16:20:58,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292402801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:20:58,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:20:58,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:20:58,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719482441] [2021-12-21 16:20:58,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:20:58,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:20:58,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:20:58,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:20:58,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:20:58,894 INFO L87 Difference]: Start difference. First operand has 1086 states, 804 states have (on average 1.4291044776119404) internal successors, (1149), 837 states have internal predecessors, (1149), 229 states have call successors, (229), 52 states have call predecessors, (229), 51 states have return successors, (224), 222 states have call predecessors, (224), 224 states have call successors, (224) 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 16:21:02,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:02,515 INFO L93 Difference]: Finished difference Result 2922 states and 4363 transitions. [2021-12-21 16:21:02,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:21:02,517 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 63 [2021-12-21 16:21:02,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:02,534 INFO L225 Difference]: With dead ends: 2922 [2021-12-21 16:21:02,534 INFO L226 Difference]: Without dead ends: 1756 [2021-12-21 16:21:02,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 16:21:02,543 INFO L933 BasicCegarLoop]: 1695 mSDtfsCounter, 1443 mSDsluCounter, 1745 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 3440 SdHoareTripleChecker+Invalid, 1636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 500 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:02,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1568 Valid, 3440 Invalid, 1636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [500 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-21 16:21:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2021-12-21 16:21:02,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 1600. [2021-12-21 16:21:02,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1178 states have (on average 1.403225806451613) internal successors, (1653), 1211 states have internal predecessors, (1653), 333 states have call successors, (333), 89 states have call predecessors, (333), 88 states have return successors, (332), 329 states have call predecessors, (332), 332 states have call successors, (332) [2021-12-21 16:21:02,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2318 transitions. [2021-12-21 16:21:02,654 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2318 transitions. Word has length 63 [2021-12-21 16:21:02,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:02,655 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 2318 transitions. [2021-12-21 16:21:02,655 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, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 16:21:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2318 transitions. [2021-12-21 16:21:02,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-21 16:21:02,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:02,664 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-12-21 16:21:02,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 16:21:02,664 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:02,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2079290676, now seen corresponding path program 1 times [2021-12-21 16:21:02,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:02,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209129177] [2021-12-21 16:21:02,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:02,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:02,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:02,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:02,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:02,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:02,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:02,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:02,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:02,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:02,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:21:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:02,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:21:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:02,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:21:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:02,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 16:21:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:02,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 16:21:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-21 16:21:02,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:02,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209129177] [2021-12-21 16:21:02,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209129177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:02,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:21:02,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:21:02,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147717724] [2021-12-21 16:21:02,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:02,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:21:02,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:02,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:21:02,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:21:02,844 INFO L87 Difference]: Start difference. First operand 1600 states and 2318 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-21 16:21:05,299 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:21:06,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:06,117 INFO L93 Difference]: Finished difference Result 3366 states and 4935 transitions. [2021-12-21 16:21:06,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:21:06,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 104 [2021-12-21 16:21:06,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:06,130 INFO L225 Difference]: With dead ends: 3366 [2021-12-21 16:21:06,130 INFO L226 Difference]: Without dead ends: 1790 [2021-12-21 16:21:06,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:21:06,136 INFO L933 BasicCegarLoop]: 1470 mSDtfsCounter, 2268 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 822 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2398 SdHoareTripleChecker+Valid, 2068 SdHoareTripleChecker+Invalid, 1315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 822 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:06,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2398 Valid, 2068 Invalid, 1315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [822 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-21 16:21:06,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-12-21 16:21:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1600. [2021-12-21 16:21:06,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1178 states have (on average 1.401528013582343) internal successors, (1651), 1211 states have internal predecessors, (1651), 333 states have call successors, (333), 89 states have call predecessors, (333), 88 states have return successors, (332), 329 states have call predecessors, (332), 332 states have call successors, (332) [2021-12-21 16:21:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2316 transitions. [2021-12-21 16:21:06,230 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2316 transitions. Word has length 104 [2021-12-21 16:21:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:06,230 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 2316 transitions. [2021-12-21 16:21:06,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-21 16:21:06,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2316 transitions. [2021-12-21 16:21:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-21 16:21:06,234 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:06,234 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-12-21 16:21:06,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 16:21:06,235 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:06,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:06,235 INFO L85 PathProgramCache]: Analyzing trace with hash 187090510, now seen corresponding path program 1 times [2021-12-21 16:21:06,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:06,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81327465] [2021-12-21 16:21:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:06,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:06,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:06,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:06,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:06,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:06,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:06,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:06,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:06,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:06,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:06,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:21:06,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:06,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:21:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:06,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:21:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:06,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-21 16:21:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:06,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-21 16:21:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-12-21 16:21:06,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:06,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81327465] [2021-12-21 16:21:06,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81327465] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:06,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:21:06,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 16:21:06,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015467377] [2021-12-21 16:21:06,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:06,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:21:06,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:06,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:21:06,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:21:06,362 INFO L87 Difference]: Start difference. First operand 1600 states and 2316 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 16:21:08,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:21:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:10,514 INFO L93 Difference]: Finished difference Result 3370 states and 4935 transitions. [2021-12-21 16:21:10,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 16:21:10,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-12-21 16:21:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:10,523 INFO L225 Difference]: With dead ends: 3370 [2021-12-21 16:21:10,523 INFO L226 Difference]: Without dead ends: 1790 [2021-12-21 16:21:10,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:21:10,528 INFO L933 BasicCegarLoop]: 1484 mSDtfsCounter, 1008 mSDsluCounter, 2763 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 4247 SdHoareTripleChecker+Invalid, 2108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:10,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 4247 Invalid, 2108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [525 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-12-21 16:21:10,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-12-21 16:21:10,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1600. [2021-12-21 16:21:10,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1178 states have (on average 1.399830220713073) internal successors, (1649), 1211 states have internal predecessors, (1649), 333 states have call successors, (333), 89 states have call predecessors, (333), 88 states have return successors, (332), 329 states have call predecessors, (332), 332 states have call successors, (332) [2021-12-21 16:21:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 2314 transitions. [2021-12-21 16:21:10,605 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 2314 transitions. Word has length 104 [2021-12-21 16:21:10,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:10,607 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 2314 transitions. [2021-12-21 16:21:10,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 16:21:10,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 2314 transitions. [2021-12-21 16:21:10,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-12-21 16:21:10,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:10,611 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-12-21 16:21:10,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 16:21:10,611 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:10,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:10,612 INFO L85 PathProgramCache]: Analyzing trace with hash -540695394, now seen corresponding path program 1 times [2021-12-21 16:21:10,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:10,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830920291] [2021-12-21 16:21:10,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:10,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:10,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:10,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:10,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:10,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:10,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:10,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:10,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:10,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:21:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:10,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:21:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:10,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:21:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:10,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 16:21:10,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:10,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:21:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:10,751 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-21 16:21:10,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:10,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830920291] [2021-12-21 16:21:10,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830920291] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:10,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:21:10,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 16:21:10,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111930891] [2021-12-21 16:21:10,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:10,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:21:10,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:10,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:21:10,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:21:10,753 INFO L87 Difference]: Start difference. First operand 1600 states and 2314 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-21 16:21:15,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:15,236 INFO L93 Difference]: Finished difference Result 2381 states and 3634 transitions. [2021-12-21 16:21:15,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:21:15,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 107 [2021-12-21 16:21:15,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:15,251 INFO L225 Difference]: With dead ends: 2381 [2021-12-21 16:21:15,251 INFO L226 Difference]: Without dead ends: 2378 [2021-12-21 16:21:15,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:21:15,258 INFO L933 BasicCegarLoop]: 2111 mSDtfsCounter, 1343 mSDsluCounter, 4428 mSDsCounter, 0 mSdLazyCounter, 2113 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1466 SdHoareTripleChecker+Valid, 6539 SdHoareTripleChecker+Invalid, 2565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 2113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:15,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1466 Valid, 6539 Invalid, 2565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 2113 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-21 16:21:15,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2021-12-21 16:21:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 1602. [2021-12-21 16:21:15,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1602 states, 1180 states have (on average 1.3991525423728814) internal successors, (1651), 1213 states have internal predecessors, (1651), 333 states have call successors, (333), 89 states have call predecessors, (333), 88 states have return successors, (332), 329 states have call predecessors, (332), 332 states have call successors, (332) [2021-12-21 16:21:15,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1602 states to 1602 states and 2316 transitions. [2021-12-21 16:21:15,323 INFO L78 Accepts]: Start accepts. Automaton has 1602 states and 2316 transitions. Word has length 107 [2021-12-21 16:21:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:15,323 INFO L470 AbstractCegarLoop]: Abstraction has 1602 states and 2316 transitions. [2021-12-21 16:21:15,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 4 states have internal predecessors, (57), 2 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-12-21 16:21:15,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1602 states and 2316 transitions. [2021-12-21 16:21:15,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-21 16:21:15,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:15,328 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-12-21 16:21:15,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 16:21:15,329 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:15,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:15,329 INFO L85 PathProgramCache]: Analyzing trace with hash -756513172, now seen corresponding path program 1 times [2021-12-21 16:21:15,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:15,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791460779] [2021-12-21 16:21:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:15,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:15,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:15,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:15,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:15,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:15,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:15,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:15,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:15,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:21:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:15,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:21:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:15,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:21:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:15,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 16:21:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:15,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:21:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:15,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 16:21:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-21 16:21:15,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:15,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791460779] [2021-12-21 16:21:15,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791460779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:15,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:21:15,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 16:21:15,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645724496] [2021-12-21 16:21:15,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:15,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:21:15,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:15,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:21:15,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:21:15,532 INFO L87 Difference]: Start difference. First operand 1602 states and 2316 transitions. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-21 16:21:17,856 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 16:21:19,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:19,869 INFO L93 Difference]: Finished difference Result 3959 states and 5919 transitions. [2021-12-21 16:21:19,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:21:19,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 117 [2021-12-21 16:21:19,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:19,881 INFO L225 Difference]: With dead ends: 3959 [2021-12-21 16:21:19,882 INFO L226 Difference]: Without dead ends: 2381 [2021-12-21 16:21:19,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:21:19,887 INFO L933 BasicCegarLoop]: 1837 mSDtfsCounter, 2434 mSDsluCounter, 2347 mSDsCounter, 0 mSdLazyCounter, 2118 mSolverCounterSat, 734 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2691 SdHoareTripleChecker+Valid, 4184 SdHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 734 IncrementalHoareTripleChecker+Valid, 2118 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:19,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2691 Valid, 4184 Invalid, 2853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [734 Valid, 2118 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-12-21 16:21:19,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2021-12-21 16:21:19,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 1603. [2021-12-21 16:21:19,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1181 states have (on average 1.3988145639288738) internal successors, (1652), 1214 states have internal predecessors, (1652), 333 states have call successors, (333), 89 states have call predecessors, (333), 88 states have return successors, (332), 329 states have call predecessors, (332), 332 states have call successors, (332) [2021-12-21 16:21:19,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 2317 transitions. [2021-12-21 16:21:19,954 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 2317 transitions. Word has length 117 [2021-12-21 16:21:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:19,955 INFO L470 AbstractCegarLoop]: Abstraction has 1603 states and 2317 transitions. [2021-12-21 16:21:19,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 4 states have internal predecessors, (65), 3 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-21 16:21:19,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 2317 transitions. [2021-12-21 16:21:19,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-21 16:21:19,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:19,960 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-12-21 16:21:19,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 16:21:19,960 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:19,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:19,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1902158187, now seen corresponding path program 1 times [2021-12-21 16:21:19,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:19,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013530697] [2021-12-21 16:21:19,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:19,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:20,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:20,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:20,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:20,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:20,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:20,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:20,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:20,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:21:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:20,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:21:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:20,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:21:20,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:20,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 16:21:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:20,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:21:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:20,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 16:21:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-21 16:21:20,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:20,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013530697] [2021-12-21 16:21:20,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013530697] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:20,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:21:20,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:21:20,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053962508] [2021-12-21 16:21:20,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:20,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:21:20,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:20,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:21:20,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:21:20,143 INFO L87 Difference]: Start difference. First operand 1603 states and 2317 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-21 16:21:21,542 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:21:23,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:21:27,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:27,407 INFO L93 Difference]: Finished difference Result 3313 states and 5203 transitions. [2021-12-21 16:21:27,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 16:21:27,408 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 119 [2021-12-21 16:21:27,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:27,424 INFO L225 Difference]: With dead ends: 3313 [2021-12-21 16:21:27,424 INFO L226 Difference]: Without dead ends: 3310 [2021-12-21 16:21:27,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-21 16:21:27,428 INFO L933 BasicCegarLoop]: 2550 mSDtfsCounter, 2187 mSDsluCounter, 7202 mSDsCounter, 0 mSdLazyCounter, 3038 mSolverCounterSat, 811 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2406 SdHoareTripleChecker+Valid, 9752 SdHoareTripleChecker+Invalid, 3849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 811 IncrementalHoareTripleChecker+Valid, 3038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:27,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2406 Valid, 9752 Invalid, 3849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [811 Valid, 3038 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2021-12-21 16:21:27,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-12-21 16:21:27,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 1605. [2021-12-21 16:21:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1182 states have (on average 1.398477157360406) internal successors, (1653), 1214 states have internal predecessors, (1653), 334 states have call successors, (334), 89 states have call predecessors, (334), 88 states have return successors, (333), 330 states have call predecessors, (333), 333 states have call successors, (333) [2021-12-21 16:21:27,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 2320 transitions. [2021-12-21 16:21:27,509 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 2320 transitions. Word has length 119 [2021-12-21 16:21:27,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:27,509 INFO L470 AbstractCegarLoop]: Abstraction has 1605 states and 2320 transitions. [2021-12-21 16:21:27,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 5 states have internal predecessors, (67), 3 states have call successors, (13), 4 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-12-21 16:21:27,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 2320 transitions. [2021-12-21 16:21:27,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-21 16:21:27,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:27,516 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-12-21 16:21:27,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 16:21:27,516 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:27,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:27,518 INFO L85 PathProgramCache]: Analyzing trace with hash 647562230, now seen corresponding path program 1 times [2021-12-21 16:21:27,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:27,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880815796] [2021-12-21 16:21:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:27,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:27,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:21:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:21:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:21:27,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 16:21:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:21:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 16:21:27,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-21 16:21:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-21 16:21:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-21 16:21:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2021-12-21 16:21:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:27,708 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-21 16:21:27,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:27,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880815796] [2021-12-21 16:21:27,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880815796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:27,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:21:27,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:21:27,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022852823] [2021-12-21 16:21:27,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:27,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:21:27,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:27,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:21:27,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:21:27,711 INFO L87 Difference]: Start difference. First operand 1605 states and 2320 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-21 16:21:31,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:21:32,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:32,690 INFO L93 Difference]: Finished difference Result 3997 states and 5839 transitions. [2021-12-21 16:21:32,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:21:32,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 149 [2021-12-21 16:21:32,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:32,705 INFO L225 Difference]: With dead ends: 3997 [2021-12-21 16:21:32,705 INFO L226 Difference]: Without dead ends: 2416 [2021-12-21 16:21:32,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:21:32,711 INFO L933 BasicCegarLoop]: 2197 mSDtfsCounter, 2289 mSDsluCounter, 1456 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 886 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2475 SdHoareTripleChecker+Valid, 3653 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 886 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:32,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2475 Valid, 3653 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [886 Valid, 1040 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-12-21 16:21:32,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-12-21 16:21:32,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2140. [2021-12-21 16:21:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 1567 states have (on average 1.391193363114231) internal successors, (2180), 1608 states have internal predecessors, (2180), 448 states have call successors, (448), 126 states have call predecessors, (448), 124 states have return successors, (447), 441 states have call predecessors, (447), 447 states have call successors, (447) [2021-12-21 16:21:32,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 3075 transitions. [2021-12-21 16:21:32,825 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 3075 transitions. Word has length 149 [2021-12-21 16:21:32,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:32,825 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 3075 transitions. [2021-12-21 16:21:32,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 3 states have internal predecessors, (90), 3 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-21 16:21:32,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 3075 transitions. [2021-12-21 16:21:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-21 16:21:32,833 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:32,833 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-12-21 16:21:32,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 16:21:32,833 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:32,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:32,834 INFO L85 PathProgramCache]: Analyzing trace with hash -713832836, now seen corresponding path program 1 times [2021-12-21 16:21:32,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:32,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424772241] [2021-12-21 16:21:32,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:32,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:32,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:32,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:32,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:32,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:32,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:32,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:32,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:21:32,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:32,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:21:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:32,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:21:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:32,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 16:21:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:32,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:21:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:32,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 16:21:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:32,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-21 16:21:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:33,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-21 16:21:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:33,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-21 16:21:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:33,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-21 16:21:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:33,012 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-21 16:21:33,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:33,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424772241] [2021-12-21 16:21:33,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424772241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:33,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:21:33,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 16:21:33,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147840718] [2021-12-21 16:21:33,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:33,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:21:33,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:33,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:21:33,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:21:33,015 INFO L87 Difference]: Start difference. First operand 2140 states and 3075 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-21 16:21:35,771 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:21:37,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:37,449 INFO L93 Difference]: Finished difference Result 4583 states and 6821 transitions. [2021-12-21 16:21:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 16:21:37,450 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 151 [2021-12-21 16:21:37,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:37,463 INFO L225 Difference]: With dead ends: 4583 [2021-12-21 16:21:37,463 INFO L226 Difference]: Without dead ends: 3002 [2021-12-21 16:21:37,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:21:37,469 INFO L933 BasicCegarLoop]: 2016 mSDtfsCounter, 2724 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 1757 mSolverCounterSat, 934 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2977 SdHoareTripleChecker+Valid, 3754 SdHoareTripleChecker+Invalid, 2691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 934 IncrementalHoareTripleChecker+Valid, 1757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:37,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2977 Valid, 3754 Invalid, 2691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [934 Valid, 1757 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-21 16:21:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-12-21 16:21:37,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2144. [2021-12-21 16:21:37,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 1571 states have (on average 1.3908338637810311) internal successors, (2185), 1612 states have internal predecessors, (2185), 448 states have call successors, (448), 126 states have call predecessors, (448), 124 states have return successors, (447), 441 states have call predecessors, (447), 447 states have call successors, (447) [2021-12-21 16:21:37,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 3080 transitions. [2021-12-21 16:21:37,585 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 3080 transitions. Word has length 151 [2021-12-21 16:21:37,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:37,586 INFO L470 AbstractCegarLoop]: Abstraction has 2144 states and 3080 transitions. [2021-12-21 16:21:37,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 4 states have internal predecessors, (89), 3 states have call successors, (17), 4 states have call predecessors, (17), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-12-21 16:21:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 3080 transitions. [2021-12-21 16:21:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-21 16:21:37,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:37,606 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-12-21 16:21:37,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 16:21:37,606 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:37,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:37,607 INFO L85 PathProgramCache]: Analyzing trace with hash -134166477, now seen corresponding path program 1 times [2021-12-21 16:21:37,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:37,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920482852] [2021-12-21 16:21:37,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:37,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:37,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:37,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:37,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:21:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:21:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:21:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 16:21:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:21:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 16:21:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-21 16:21:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-21 16:21:37,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2021-12-21 16:21:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-21 16:21:37,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-12-21 16:21:37,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:37,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920482852] [2021-12-21 16:21:37,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920482852] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:37,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:21:37,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:21:37,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111067664] [2021-12-21 16:21:37,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:37,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:21:37,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:37,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:21:37,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:21:37,752 INFO L87 Difference]: Start difference. First operand 2144 states and 3080 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 16:21:39,972 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:21:41,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:41,047 INFO L93 Difference]: Finished difference Result 4538 states and 6632 transitions. [2021-12-21 16:21:41,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:21:41,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 154 [2021-12-21 16:21:41,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:41,072 INFO L225 Difference]: With dead ends: 4538 [2021-12-21 16:21:41,072 INFO L226 Difference]: Without dead ends: 2418 [2021-12-21 16:21:41,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:21:41,081 INFO L933 BasicCegarLoop]: 1475 mSDtfsCounter, 994 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 534 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1081 SdHoareTripleChecker+Valid, 3157 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:41,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1081 Valid, 3157 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 1015 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-12-21 16:21:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2418 states. [2021-12-21 16:21:41,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2418 to 2144. [2021-12-21 16:21:41,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 1571 states have (on average 1.3851050286441757) internal successors, (2176), 1612 states have internal predecessors, (2176), 448 states have call successors, (448), 126 states have call predecessors, (448), 124 states have return successors, (447), 441 states have call predecessors, (447), 447 states have call successors, (447) [2021-12-21 16:21:41,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 3071 transitions. [2021-12-21 16:21:41,184 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 3071 transitions. Word has length 154 [2021-12-21 16:21:41,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:41,184 INFO L470 AbstractCegarLoop]: Abstraction has 2144 states and 3071 transitions. [2021-12-21 16:21:41,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-21 16:21:41,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 3071 transitions. [2021-12-21 16:21:41,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-21 16:21:41,192 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:41,193 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-12-21 16:21:41,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 16:21:41,193 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:41,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:41,193 INFO L85 PathProgramCache]: Analyzing trace with hash -394171254, now seen corresponding path program 1 times [2021-12-21 16:21:41,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:41,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645613709] [2021-12-21 16:21:41,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:41,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:21:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:21:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:21:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 16:21:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:21:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 16:21:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-21 16:21:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-21 16:21:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-21 16:21:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-21 16:21:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,407 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-21 16:21:41,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:41,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645613709] [2021-12-21 16:21:41,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645613709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:21:41,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601421230] [2021-12-21 16:21:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:41,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:21:41,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:21:41,424 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 16:21:41,452 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 16:21:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:41,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 16:21:41,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:21:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-12-21 16:21:42,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:21:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2021-12-21 16:21:42,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601421230] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:21:42,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 16:21:42,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 5] total 12 [2021-12-21 16:21:42,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330406566] [2021-12-21 16:21:42,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 16:21:42,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 16:21:42,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:42,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 16:21:42,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-12-21 16:21:42,358 INFO L87 Difference]: Start difference. First operand 2144 states and 3071 transitions. Second operand has 12 states, 12 states have (on average 15.416666666666666) internal successors, (185), 10 states have internal predecessors, (185), 4 states have call successors, (45), 5 states have call predecessors, (45), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-12-21 16:21:44,750 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:21:47,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:47,550 INFO L93 Difference]: Finished difference Result 6337 states and 9744 transitions. [2021-12-21 16:21:47,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 16:21:47,550 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 15.416666666666666) internal successors, (185), 10 states have internal predecessors, (185), 4 states have call successors, (45), 5 states have call predecessors, (45), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) Word has length 157 [2021-12-21 16:21:47,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:47,576 INFO L225 Difference]: With dead ends: 6337 [2021-12-21 16:21:47,577 INFO L226 Difference]: Without dead ends: 4752 [2021-12-21 16:21:47,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-21 16:21:47,582 INFO L933 BasicCegarLoop]: 2775 mSDtfsCounter, 5157 mSDsluCounter, 5289 mSDsCounter, 0 mSdLazyCounter, 4456 mSolverCounterSat, 1835 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5533 SdHoareTripleChecker+Valid, 8064 SdHoareTripleChecker+Invalid, 6292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1835 IncrementalHoareTripleChecker+Valid, 4456 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:47,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5533 Valid, 8064 Invalid, 6292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1835 Valid, 4456 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-12-21 16:21:47,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4752 states. [2021-12-21 16:21:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4752 to 2151. [2021-12-21 16:21:47,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2151 states, 1578 states have (on average 1.3846641318124209) internal successors, (2185), 1619 states have internal predecessors, (2185), 448 states have call successors, (448), 126 states have call predecessors, (448), 124 states have return successors, (447), 441 states have call predecessors, (447), 447 states have call successors, (447) [2021-12-21 16:21:47,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2151 states to 2151 states and 3080 transitions. [2021-12-21 16:21:47,719 INFO L78 Accepts]: Start accepts. Automaton has 2151 states and 3080 transitions. Word has length 157 [2021-12-21 16:21:47,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:47,719 INFO L470 AbstractCegarLoop]: Abstraction has 2151 states and 3080 transitions. [2021-12-21 16:21:47,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.416666666666666) internal successors, (185), 10 states have internal predecessors, (185), 4 states have call successors, (45), 5 states have call predecessors, (45), 3 states have return successors, (43), 4 states have call predecessors, (43), 4 states have call successors, (43) [2021-12-21 16:21:47,720 INFO L276 IsEmpty]: Start isEmpty. Operand 2151 states and 3080 transitions. [2021-12-21 16:21:47,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-12-21 16:21:47,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:47,728 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2021-12-21 16:21:47,751 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 16:21:47,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 16:21:47,943 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:47,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:47,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1286483840, now seen corresponding path program 1 times [2021-12-21 16:21:47,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:47,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110524941] [2021-12-21 16:21:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:47,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:21:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:21:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:21:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 16:21:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:21:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 16:21:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-21 16:21:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-21 16:21:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-21 16:21:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-21 16:21:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-21 16:21:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,192 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2021-12-21 16:21:48,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:48,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110524941] [2021-12-21 16:21:48,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110524941] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:21:48,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548784790] [2021-12-21 16:21:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:48,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:21:48,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:21:48,194 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:21:48,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 16:21:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:48,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 16:21:48,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:21:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-12-21 16:21:48,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:21:48,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548784790] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:48,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:21:48,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2021-12-21 16:21:48,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013322648] [2021-12-21 16:21:48,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:48,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:21:48,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:48,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:21:48,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-12-21 16:21:48,765 INFO L87 Difference]: Start difference. First operand 2151 states and 3080 transitions. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 16:21:49,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:49,111 INFO L93 Difference]: Finished difference Result 4673 states and 6859 transitions. [2021-12-21 16:21:49,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 16:21:49,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 166 [2021-12-21 16:21:49,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:49,128 INFO L225 Difference]: With dead ends: 4673 [2021-12-21 16:21:49,128 INFO L226 Difference]: Without dead ends: 3081 [2021-12-21 16:21:49,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-21 16:21:49,133 INFO L933 BasicCegarLoop]: 2180 mSDtfsCounter, 918 mSDsluCounter, 3634 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 5814 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:49,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [991 Valid, 5814 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 16:21:49,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2021-12-21 16:21:49,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 2153. [2021-12-21 16:21:49,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 1580 states have (on average 1.3841772151898735) internal successors, (2187), 1621 states have internal predecessors, (2187), 448 states have call successors, (448), 126 states have call predecessors, (448), 124 states have return successors, (447), 441 states have call predecessors, (447), 447 states have call successors, (447) [2021-12-21 16:21:49,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3082 transitions. [2021-12-21 16:21:49,248 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3082 transitions. Word has length 166 [2021-12-21 16:21:49,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:49,248 INFO L470 AbstractCegarLoop]: Abstraction has 2153 states and 3082 transitions. [2021-12-21 16:21:49,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 2 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-21 16:21:49,249 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3082 transitions. [2021-12-21 16:21:49,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-21 16:21:49,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:49,256 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1] [2021-12-21 16:21:49,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 16:21:49,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 16:21:49,472 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:49,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:49,473 INFO L85 PathProgramCache]: Analyzing trace with hash 200803734, now seen corresponding path program 1 times [2021-12-21 16:21:49,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:49,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904657219] [2021-12-21 16:21:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:49,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:21:49,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:21:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:21:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 16:21:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:21:49,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 16:21:49,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-21 16:21:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-21 16:21:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-21 16:21:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-21 16:21:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2021-12-21 16:21:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2021-12-21 16:21:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2021-12-21 16:21:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:49,655 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-12-21 16:21:49,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:49,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904657219] [2021-12-21 16:21:49,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904657219] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:49,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:21:49,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 16:21:49,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529931893] [2021-12-21 16:21:49,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:49,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:21:49,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:49,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:21:49,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:21:49,657 INFO L87 Difference]: Start difference. First operand 2153 states and 3082 transitions. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (20), 5 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-21 16:21:53,007 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-21 16:21:55,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:55,058 INFO L93 Difference]: Finished difference Result 4649 states and 6898 transitions. [2021-12-21 16:21:55,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 16:21:55,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (20), 5 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 175 [2021-12-21 16:21:55,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:55,068 INFO L225 Difference]: With dead ends: 4649 [2021-12-21 16:21:55,069 INFO L226 Difference]: Without dead ends: 3055 [2021-12-21 16:21:55,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:21:55,074 INFO L933 BasicCegarLoop]: 1981 mSDtfsCounter, 1984 mSDsluCounter, 2638 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 987 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2128 SdHoareTripleChecker+Valid, 4619 SdHoareTripleChecker+Invalid, 2822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 987 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:55,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2128 Valid, 4619 Invalid, 2822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [987 Valid, 1834 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-12-21 16:21:55,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3055 states. [2021-12-21 16:21:55,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3055 to 2155. [2021-12-21 16:21:55,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2155 states, 1582 states have (on average 1.383691529709229) internal successors, (2189), 1623 states have internal predecessors, (2189), 448 states have call successors, (448), 126 states have call predecessors, (448), 124 states have return successors, (447), 441 states have call predecessors, (447), 447 states have call successors, (447) [2021-12-21 16:21:55,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2155 states to 2155 states and 3084 transitions. [2021-12-21 16:21:55,247 INFO L78 Accepts]: Start accepts. Automaton has 2155 states and 3084 transitions. Word has length 175 [2021-12-21 16:21:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:55,248 INFO L470 AbstractCegarLoop]: Abstraction has 2155 states and 3084 transitions. [2021-12-21 16:21:55,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (20), 5 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-12-21 16:21:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand 2155 states and 3084 transitions. [2021-12-21 16:21:55,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-21 16:21:55,255 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:55,255 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1] [2021-12-21 16:21:55,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 16:21:55,256 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:55,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:55,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1759072087, now seen corresponding path program 1 times [2021-12-21 16:21:55,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:55,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177083151] [2021-12-21 16:21:55,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:55,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:55,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:21:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:21:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:21:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-21 16:21:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-21 16:21:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 16:21:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-21 16:21:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2021-12-21 16:21:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2021-12-21 16:21:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-21 16:21:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-21 16:21:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-21 16:21:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-21 16:21:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 16:21:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2021-12-21 16:21:55,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:55,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177083151] [2021-12-21 16:21:55,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177083151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:21:55,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928148322] [2021-12-21 16:21:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:55,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:21:55,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:21:55,556 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:21:55,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 16:21:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:56,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 1500 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-21 16:21:56,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:21:56,323 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-21 16:21:56,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:21:56,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928148322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:56,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:21:56,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 12 [2021-12-21 16:21:56,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072873365] [2021-12-21 16:21:56,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:56,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 16:21:56,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:56,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 16:21:56,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-21 16:21:56,325 INFO L87 Difference]: Start difference. First operand 2155 states and 3084 transitions. Second operand has 9 states, 9 states have (on average 13.0) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-21 16:21:56,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:21:56,590 INFO L93 Difference]: Finished difference Result 3784 states and 5431 transitions. [2021-12-21 16:21:56,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 16:21:56,591 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) Word has length 183 [2021-12-21 16:21:56,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:21:56,597 INFO L225 Difference]: With dead ends: 3784 [2021-12-21 16:21:56,597 INFO L226 Difference]: Without dead ends: 2180 [2021-12-21 16:21:56,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-12-21 16:21:56,602 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 798 mSDsluCounter, 11482 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 13147 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:21:56,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 13147 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 16:21:56,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2021-12-21 16:21:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 2178. [2021-12-21 16:21:56,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2178 states, 1598 states have (on average 1.3804755944931164) internal successors, (2206), 1642 states have internal predecessors, (2206), 448 states have call successors, (448), 126 states have call predecessors, (448), 131 states have return successors, (465), 445 states have call predecessors, (465), 447 states have call successors, (465) [2021-12-21 16:21:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 3119 transitions. [2021-12-21 16:21:56,714 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 3119 transitions. Word has length 183 [2021-12-21 16:21:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:21:56,714 INFO L470 AbstractCegarLoop]: Abstraction has 2178 states and 3119 transitions. [2021-12-21 16:21:56,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.0) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (20), 4 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-21 16:21:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 3119 transitions. [2021-12-21 16:21:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-12-21 16:21:56,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:21:56,721 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:21:56,743 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-21 16:21:56,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:21:56,943 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:21:56,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:21:56,944 INFO L85 PathProgramCache]: Analyzing trace with hash -515123284, now seen corresponding path program 1 times [2021-12-21 16:21:56,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:21:56,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296846113] [2021-12-21 16:21:56,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:21:56,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:21:57,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-21 16:21:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-21 16:21:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:21:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:21:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:21:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-21 16:21:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-21 16:21:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:21:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:21:57,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-21 16:21:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-21 16:21:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 16:21:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2021-12-21 16:21:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-21 16:21:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-21 16:21:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-12-21 16:21:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-21 16:21:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2021-12-21 16:21:57,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-21 16:21:57,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-12-21 16:21:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:21:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-12-21 16:21:57,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:21:57,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296846113] [2021-12-21 16:21:57,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296846113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:21:57,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:21:57,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 16:21:57,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754812558] [2021-12-21 16:21:57,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:21:57,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 16:21:57,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:21:57,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 16:21:57,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:21:57,210 INFO L87 Difference]: Start difference. First operand 2178 states and 3119 transitions. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 5 states have internal predecessors, (114), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21)