./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--asb100.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--asb100.ko-main.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 a172742698d01ea3d6a7e277a97e7636a1425e62fd3035feb511b810f7b798f5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 10:41:12,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 10:41:12,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 10:41:12,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 10:41:12,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 10:41:12,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 10:41:12,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 10:41:12,345 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 10:41:12,346 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 10:41:12,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 10:41:12,348 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 10:41:12,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 10:41:12,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 10:41:12,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 10:41:12,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 10:41:12,351 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 10:41:12,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 10:41:12,352 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 10:41:12,353 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 10:41:12,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 10:41:12,355 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 10:41:12,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 10:41:12,356 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 10:41:12,357 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 10:41:12,358 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 10:41:12,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 10:41:12,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 10:41:12,360 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 10:41:12,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 10:41:12,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 10:41:12,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 10:41:12,362 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 10:41:12,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 10:41:12,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 10:41:12,363 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 10:41:12,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 10:41:12,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 10:41:12,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 10:41:12,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 10:41:12,365 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 10:41:12,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 10:41:12,366 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 10:41:12,367 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-21 10:41:12,381 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 10:41:12,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 10:41:12,382 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 10:41:12,382 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 10:41:12,383 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 10:41:12,383 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 10:41:12,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 10:41:12,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 10:41:12,384 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 10:41:12,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 10:41:12,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 10:41:12,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 10:41:12,385 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 10:41:12,385 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 10:41:12,386 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 10:41:12,386 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 10:41:12,386 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 10:41:12,386 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 10:41:12,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 10:41:12,386 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 10:41:12,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 10:41:12,387 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 10:41:12,387 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 10:41:12,387 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 10:41:12,387 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 10:41:12,387 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 10:41:12,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 10:41:12,388 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 10:41:12,388 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 10:41:12,388 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 10:41:12,388 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a172742698d01ea3d6a7e277a97e7636a1425e62fd3035feb511b810f7b798f5 [2022-07-21 10:41:12,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 10:41:12,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 10:41:12,655 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 10:41:12,656 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 10:41:12,656 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 10:41:12,657 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--asb100.ko-main.cil.out.i [2022-07-21 10:41:12,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e25f8f0a5/631a689ee1ae4a758df7f0487c7ff120/FLAG3f37a3dfd [2022-07-21 10:41:13,288 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 10:41:13,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--asb100.ko-main.cil.out.i [2022-07-21 10:41:13,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e25f8f0a5/631a689ee1ae4a758df7f0487c7ff120/FLAG3f37a3dfd [2022-07-21 10:41:13,681 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e25f8f0a5/631a689ee1ae4a758df7f0487c7ff120 [2022-07-21 10:41:13,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 10:41:13,684 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 10:41:13,685 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 10:41:13,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 10:41:13,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 10:41:13,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:41:13" (1/1) ... [2022-07-21 10:41:13,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ce05a76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:13, skipping insertion in model container [2022-07-21 10:41:13,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:41:13" (1/1) ... [2022-07-21 10:41:13,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 10:41:13,771 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 10:41:14,569 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-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--asb100.ko-main.cil.out.i[168612,168625] [2022-07-21 10:41:14,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 10:41:14,665 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 10:41:14,868 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-consumption/32_7a_cilled_linux-3.8-rc1-drivers--hwmon--asb100.ko-main.cil.out.i[168612,168625] [2022-07-21 10:41:14,878 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 10:41:15,021 INFO L208 MainTranslator]: Completed translation [2022-07-21 10:41:15,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:15 WrapperNode [2022-07-21 10:41:15,023 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 10:41:15,024 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 10:41:15,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 10:41:15,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 10:41:15,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:15" (1/1) ... [2022-07-21 10:41:15,110 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:15" (1/1) ... [2022-07-21 10:41:15,246 INFO L137 Inliner]: procedures = 184, calls = 1940, calls flagged for inlining = 74, calls inlined = 66, statements flattened = 5145 [2022-07-21 10:41:15,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 10:41:15,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 10:41:15,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 10:41:15,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 10:41:15,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:15" (1/1) ... [2022-07-21 10:41:15,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:15" (1/1) ... [2022-07-21 10:41:15,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:15" (1/1) ... [2022-07-21 10:41:15,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:15" (1/1) ... [2022-07-21 10:41:15,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:15" (1/1) ... [2022-07-21 10:41:15,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:15" (1/1) ... [2022-07-21 10:41:15,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:15" (1/1) ... [2022-07-21 10:41:15,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 10:41:15,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 10:41:15,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 10:41:15,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 10:41:15,467 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:15" (1/1) ... [2022-07-21 10:41:15,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 10:41:15,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 10:41:15,490 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) [2022-07-21 10:41:15,571 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 [2022-07-21 10:41:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure show_fan [2022-07-21 10:41:15,616 INFO L138 BoogieDeclarations]: Found implementation of procedure show_fan [2022-07-21 10:41:15,616 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2022-07-21 10:41:15,616 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2022-07-21 10:41:15,616 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_read_word_swapped [2022-07-21 10:41:15,616 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_read_word_swapped [2022-07-21 10:41:15,616 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_update_lock_of_asb100_data [2022-07-21 10:41:15,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_update_lock_of_asb100_data [2022-07-21 10:41:15,617 INFO L130 BoogieDeclarations]: Found specification of procedure show_in_max [2022-07-21 10:41:15,617 INFO L138 BoogieDeclarations]: Found implementation of procedure show_in_max [2022-07-21 10:41:15,617 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_update_lock_of_asb100_data [2022-07-21 10:41:15,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_update_lock_of_asb100_data [2022-07-21 10:41:15,617 INFO L130 BoogieDeclarations]: Found specification of procedure set_in_max [2022-07-21 10:41:15,617 INFO L138 BoogieDeclarations]: Found implementation of procedure set_in_max [2022-07-21 10:41:15,617 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 10:41:15,617 INFO L130 BoogieDeclarations]: Found specification of procedure set_temp_hyst [2022-07-21 10:41:15,618 INFO L138 BoogieDeclarations]: Found implementation of procedure set_temp_hyst [2022-07-21 10:41:15,618 INFO L130 BoogieDeclarations]: Found specification of procedure FAN_TO_REG [2022-07-21 10:41:15,618 INFO L138 BoogieDeclarations]: Found implementation of procedure FAN_TO_REG [2022-07-21 10:41:15,618 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2022-07-21 10:41:15,618 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2022-07-21 10:41:15,619 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_get_clientdata [2022-07-21 10:41:15,619 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_get_clientdata [2022-07-21 10:41:15,619 INFO L130 BoogieDeclarations]: Found specification of procedure show_temp_hyst [2022-07-21 10:41:15,619 INFO L138 BoogieDeclarations]: Found implementation of procedure show_temp_hyst [2022-07-21 10:41:15,619 INFO L130 BoogieDeclarations]: Found specification of procedure sprintf_temp_from_reg [2022-07-21 10:41:15,619 INFO L138 BoogieDeclarations]: Found implementation of procedure sprintf_temp_from_reg [2022-07-21 10:41:15,619 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-21 10:41:15,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-21 10:41:15,620 INFO L130 BoogieDeclarations]: Found specification of procedure asb100_update_device [2022-07-21 10:41:15,620 INFO L138 BoogieDeclarations]: Found implementation of procedure asb100_update_device [2022-07-21 10:41:15,620 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_write_word_swapped [2022-07-21 10:41:15,620 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_write_word_swapped [2022-07-21 10:41:15,620 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lock_of_asb100_data [2022-07-21 10:41:15,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lock_of_asb100_data [2022-07-21 10:41:15,620 INFO L130 BoogieDeclarations]: Found specification of procedure show_fan_div [2022-07-21 10:41:15,621 INFO L138 BoogieDeclarations]: Found implementation of procedure show_fan_div [2022-07-21 10:41:15,623 INFO L130 BoogieDeclarations]: Found specification of procedure set_fan_div [2022-07-21 10:41:15,623 INFO L138 BoogieDeclarations]: Found implementation of procedure set_fan_div [2022-07-21 10:41:15,623 INFO L130 BoogieDeclarations]: Found specification of procedure LM75_TEMP_TO_REG [2022-07-21 10:41:15,623 INFO L138 BoogieDeclarations]: Found implementation of procedure LM75_TEMP_TO_REG [2022-07-21 10:41:15,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 10:41:15,623 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-07-21 10:41:15,624 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-07-21 10:41:15,624 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-21 10:41:15,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-21 10:41:15,624 INFO L130 BoogieDeclarations]: Found specification of procedure show_temp [2022-07-21 10:41:15,624 INFO L138 BoogieDeclarations]: Found implementation of procedure show_temp [2022-07-21 10:41:15,624 INFO L130 BoogieDeclarations]: Found specification of procedure set_temp_max [2022-07-21 10:41:15,625 INFO L138 BoogieDeclarations]: Found implementation of procedure set_temp_max [2022-07-21 10:41:15,625 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-07-21 10:41:15,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-07-21 10:41:15,625 INFO L130 BoogieDeclarations]: Found specification of procedure IN_TO_REG [2022-07-21 10:41:15,625 INFO L138 BoogieDeclarations]: Found implementation of procedure IN_TO_REG [2022-07-21 10:41:15,625 INFO L130 BoogieDeclarations]: Found specification of procedure set_in_min [2022-07-21 10:41:15,626 INFO L138 BoogieDeclarations]: Found implementation of procedure set_in_min [2022-07-21 10:41:15,626 INFO L130 BoogieDeclarations]: Found specification of procedure asb100_write_value [2022-07-21 10:41:15,626 INFO L138 BoogieDeclarations]: Found implementation of procedure asb100_write_value [2022-07-21 10:41:15,627 INFO L130 BoogieDeclarations]: Found specification of procedure TEMP_TO_REG [2022-07-21 10:41:15,627 INFO L138 BoogieDeclarations]: Found implementation of procedure TEMP_TO_REG [2022-07-21 10:41:15,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-21 10:41:15,627 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2022-07-21 10:41:15,628 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2022-07-21 10:41:15,628 INFO L130 BoogieDeclarations]: Found specification of procedure show_in_min [2022-07-21 10:41:15,628 INFO L138 BoogieDeclarations]: Found implementation of procedure show_in_min [2022-07-21 10:41:15,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 10:41:15,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-21 10:41:15,628 INFO L130 BoogieDeclarations]: Found specification of procedure set_fan_min [2022-07-21 10:41:15,628 INFO L138 BoogieDeclarations]: Found implementation of procedure set_fan_min [2022-07-21 10:41:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure show_fan_min [2022-07-21 10:41:15,629 INFO L138 BoogieDeclarations]: Found implementation of procedure show_fan_min [2022-07-21 10:41:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 10:41:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_asb100_data [2022-07-21 10:41:15,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_asb100_data [2022-07-21 10:41:15,630 INFO L130 BoogieDeclarations]: Found specification of procedure show_temp_max [2022-07-21 10:41:15,630 INFO L138 BoogieDeclarations]: Found implementation of procedure show_temp_max [2022-07-21 10:41:15,630 INFO L130 BoogieDeclarations]: Found specification of procedure show_alarm [2022-07-21 10:41:15,630 INFO L138 BoogieDeclarations]: Found implementation of procedure show_alarm [2022-07-21 10:41:15,630 INFO L130 BoogieDeclarations]: Found specification of procedure SENSORS_LIMIT [2022-07-21 10:41:15,630 INFO L138 BoogieDeclarations]: Found implementation of procedure SENSORS_LIMIT [2022-07-21 10:41:15,630 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_read_byte_data [2022-07-21 10:41:15,630 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_read_byte_data [2022-07-21 10:41:15,631 INFO L130 BoogieDeclarations]: Found specification of procedure show_in [2022-07-21 10:41:15,631 INFO L138 BoogieDeclarations]: Found implementation of procedure show_in [2022-07-21 10:41:15,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-21 10:41:15,631 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtol [2022-07-21 10:41:15,631 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtol [2022-07-21 10:41:15,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 10:41:15,631 INFO L130 BoogieDeclarations]: Found specification of procedure IN_FROM_REG [2022-07-21 10:41:15,631 INFO L138 BoogieDeclarations]: Found implementation of procedure IN_FROM_REG [2022-07-21 10:41:15,632 INFO L130 BoogieDeclarations]: Found specification of procedure kstrtoul [2022-07-21 10:41:15,632 INFO L138 BoogieDeclarations]: Found implementation of procedure kstrtoul [2022-07-21 10:41:15,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-21 10:41:15,632 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_unregister_device [2022-07-21 10:41:15,632 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_unregister_device [2022-07-21 10:41:15,633 INFO L130 BoogieDeclarations]: Found specification of procedure asb100_detect [2022-07-21 10:41:15,633 INFO L138 BoogieDeclarations]: Found implementation of procedure asb100_detect [2022-07-21 10:41:15,633 INFO L130 BoogieDeclarations]: Found specification of procedure asb100_read_value [2022-07-21 10:41:15,634 INFO L138 BoogieDeclarations]: Found implementation of procedure asb100_read_value [2022-07-21 10:41:15,634 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2022-07-21 10:41:15,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2022-07-21 10:41:15,634 INFO L130 BoogieDeclarations]: Found specification of procedure FAN_FROM_REG [2022-07-21 10:41:15,634 INFO L138 BoogieDeclarations]: Found implementation of procedure FAN_FROM_REG [2022-07-21 10:41:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2022-07-21 10:41:15,635 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2022-07-21 10:41:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_new_dummy [2022-07-21 10:41:15,635 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_new_dummy [2022-07-21 10:41:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 10:41:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_smbus_write_byte_data [2022-07-21 10:41:15,635 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_smbus_write_byte_data [2022-07-21 10:41:15,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 10:41:15,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 10:41:15,636 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-07-21 10:41:15,636 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-07-21 10:41:16,156 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 10:41:16,158 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 10:41:21,259 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 10:41:21,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 10:41:21,277 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 10:41:21,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:41:21 BoogieIcfgContainer [2022-07-21 10:41:21,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 10:41:21,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 10:41:21,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 10:41:21,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 10:41:21,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:41:13" (1/3) ... [2022-07-21 10:41:21,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28be0487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:41:21, skipping insertion in model container [2022-07-21 10:41:21,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:41:15" (2/3) ... [2022-07-21 10:41:21,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28be0487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:41:21, skipping insertion in model container [2022-07-21 10:41:21,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:41:21" (3/3) ... [2022-07-21 10:41:21,294 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--hwmon--asb100.ko-main.cil.out.i [2022-07-21 10:41:21,304 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 10:41:21,305 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 10:41:21,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 10:41:21,365 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@59596dae, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@25de9d83 [2022-07-21 10:41:21,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 10:41:21,372 INFO L276 IsEmpty]: Start isEmpty. Operand has 1312 states, 982 states have (on average 1.490835030549898) internal successors, (1464), 996 states have internal predecessors, (1464), 277 states have call successors, (277), 51 states have call predecessors, (277), 51 states have return successors, (277), 275 states have call predecessors, (277), 277 states have call successors, (277) [2022-07-21 10:41:21,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 10:41:21,382 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:41:21,382 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:41:21,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:41:21,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:41:21,386 INFO L85 PathProgramCache]: Analyzing trace with hash -660898654, now seen corresponding path program 1 times [2022-07-21 10:41:21,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:41:21,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224123271] [2022-07-21 10:41:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:41:21,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:41:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:21,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-21 10:41:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:21,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:41:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:21,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:41:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:21,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 10:41:21,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:41:21,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224123271] [2022-07-21 10:41:21,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224123271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:41:21,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:41:21,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 10:41:21,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544402810] [2022-07-21 10:41:21,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:41:21,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 10:41:21,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:41:21,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 10:41:21,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 10:41:21,996 INFO L87 Difference]: Start difference. First operand has 1312 states, 982 states have (on average 1.490835030549898) internal successors, (1464), 996 states have internal predecessors, (1464), 277 states have call successors, (277), 51 states have call predecessors, (277), 51 states have return successors, (277), 275 states have call predecessors, (277), 277 states have call successors, (277) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 10:41:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:41:24,003 INFO L93 Difference]: Finished difference Result 4080 states and 6739 transitions. [2022-07-21 10:41:24,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 10:41:24,005 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2022-07-21 10:41:24,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:41:24,035 INFO L225 Difference]: With dead ends: 4080 [2022-07-21 10:41:24,035 INFO L226 Difference]: Without dead ends: 2763 [2022-07-21 10:41:24,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 10:41:24,056 INFO L413 NwaCegarLoop]: 2476 mSDtfsCounter, 2217 mSDsluCounter, 3340 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 642 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2364 SdHoareTripleChecker+Valid, 5816 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 642 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-21 10:41:24,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2364 Valid, 5816 Invalid, 1412 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [642 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-21 10:41:24,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2763 states. [2022-07-21 10:41:24,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2763 to 2580. [2022-07-21 10:41:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2580 states, 1936 states have (on average 1.4834710743801653) internal successors, (2872), 1952 states have internal predecessors, (2872), 543 states have call successors, (543), 101 states have call predecessors, (543), 100 states have return successors, (534), 530 states have call predecessors, (534), 534 states have call successors, (534) [2022-07-21 10:41:24,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2580 states to 2580 states and 3949 transitions. [2022-07-21 10:41:24,263 INFO L78 Accepts]: Start accepts. Automaton has 2580 states and 3949 transitions. Word has length 34 [2022-07-21 10:41:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:41:24,264 INFO L495 AbstractCegarLoop]: Abstraction has 2580 states and 3949 transitions. [2022-07-21 10:41:24,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 10:41:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 2580 states and 3949 transitions. [2022-07-21 10:41:24,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 10:41:24,266 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:41:24,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:41:24,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 10:41:24,267 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:41:24,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:41:24,268 INFO L85 PathProgramCache]: Analyzing trace with hash 191249312, now seen corresponding path program 1 times [2022-07-21 10:41:24,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:41:24,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455981854] [2022-07-21 10:41:24,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:41:24,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:41:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:24,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 10:41:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:24,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:41:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:24,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:41:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:24,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 10:41:24,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:41:24,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455981854] [2022-07-21 10:41:24,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455981854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:41:24,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:41:24,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 10:41:24,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800229089] [2022-07-21 10:41:24,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:41:24,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 10:41:24,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:41:24,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 10:41:24,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 10:41:24,533 INFO L87 Difference]: Start difference. First operand 2580 states and 3949 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 10:41:26,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:41:26,205 INFO L93 Difference]: Finished difference Result 8008 states and 12437 transitions. [2022-07-21 10:41:26,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 10:41:26,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-07-21 10:41:26,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:41:26,230 INFO L225 Difference]: With dead ends: 8008 [2022-07-21 10:41:26,231 INFO L226 Difference]: Without dead ends: 5431 [2022-07-21 10:41:26,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 10:41:26,242 INFO L413 NwaCegarLoop]: 2347 mSDtfsCounter, 2280 mSDsluCounter, 3416 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 656 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2442 SdHoareTripleChecker+Valid, 5763 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 656 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 10:41:26,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2442 Valid, 5763 Invalid, 1416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [656 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-21 10:41:26,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2022-07-21 10:41:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 5084. [2022-07-21 10:41:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5084 states, 3824 states have (on average 1.4848326359832635) internal successors, (5678), 3848 states have internal predecessors, (5678), 1059 states have call successors, (1059), 201 states have call predecessors, (1059), 200 states have return successors, (1050), 1042 states have call predecessors, (1050), 1050 states have call successors, (1050) [2022-07-21 10:41:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5084 states to 5084 states and 7787 transitions. [2022-07-21 10:41:26,381 INFO L78 Accepts]: Start accepts. Automaton has 5084 states and 7787 transitions. Word has length 38 [2022-07-21 10:41:26,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:41:26,382 INFO L495 AbstractCegarLoop]: Abstraction has 5084 states and 7787 transitions. [2022-07-21 10:41:26,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 10:41:26,382 INFO L276 IsEmpty]: Start isEmpty. Operand 5084 states and 7787 transitions. [2022-07-21 10:41:26,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 10:41:26,384 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:41:26,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:41:26,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 10:41:26,384 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:41:26,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:41:26,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1304109229, now seen corresponding path program 1 times [2022-07-21 10:41:26,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:41:26,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947294812] [2022-07-21 10:41:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:41:26,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:41:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:26,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-21 10:41:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:26,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:41:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:26,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:41:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 10:41:26,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:41:26,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947294812] [2022-07-21 10:41:26,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947294812] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:41:26,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:41:26,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 10:41:26,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217167204] [2022-07-21 10:41:26,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:41:26,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 10:41:26,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:41:26,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 10:41:26,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 10:41:26,614 INFO L87 Difference]: Start difference. First operand 5084 states and 7787 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 10:41:29,855 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 [] [2022-07-21 10:41:30,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:41:30,472 INFO L93 Difference]: Finished difference Result 15862 states and 24647 transitions. [2022-07-21 10:41:30,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 10:41:30,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-07-21 10:41:30,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:41:30,534 INFO L225 Difference]: With dead ends: 15862 [2022-07-21 10:41:30,534 INFO L226 Difference]: Without dead ends: 10781 [2022-07-21 10:41:30,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 10:41:30,560 INFO L413 NwaCegarLoop]: 2551 mSDtfsCounter, 2237 mSDsluCounter, 3471 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 642 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2404 SdHoareTripleChecker+Valid, 6022 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 642 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-21 10:41:30,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2404 Valid, 6022 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [642 Valid, 770 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-07-21 10:41:30,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10781 states. [2022-07-21 10:41:30,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10781 to 10106. [2022-07-21 10:41:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10106 states, 7604 states have (on average 1.483955812730142) internal successors, (11284), 7644 states have internal predecessors, (11284), 2101 states have call successors, (2101), 401 states have call predecessors, (2101), 400 states have return successors, (2092), 2076 states have call predecessors, (2092), 2092 states have call successors, (2092) [2022-07-21 10:41:30,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10106 states to 10106 states and 15477 transitions. [2022-07-21 10:41:30,930 INFO L78 Accepts]: Start accepts. Automaton has 10106 states and 15477 transitions. Word has length 35 [2022-07-21 10:41:30,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:41:30,931 INFO L495 AbstractCegarLoop]: Abstraction has 10106 states and 15477 transitions. [2022-07-21 10:41:30,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 10:41:30,931 INFO L276 IsEmpty]: Start isEmpty. Operand 10106 states and 15477 transitions. [2022-07-21 10:41:30,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 10:41:30,934 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:41:30,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:41:30,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 10:41:30,934 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:41:30,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:41:30,935 INFO L85 PathProgramCache]: Analyzing trace with hash -81678797, now seen corresponding path program 1 times [2022-07-21 10:41:30,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:41:30,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536457601] [2022-07-21 10:41:30,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:41:30,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:41:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:31,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-21 10:41:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:31,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:41:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:31,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:41:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 10:41:31,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:41:31,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536457601] [2022-07-21 10:41:31,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536457601] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:41:31,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:41:31,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 10:41:31,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667833334] [2022-07-21 10:41:31,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:41:31,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 10:41:31,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:41:31,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 10:41:31,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 10:41:31,261 INFO L87 Difference]: Start difference. First operand 10106 states and 15477 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 10:41:34,492 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 [] [2022-07-21 10:41:35,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:41:35,117 INFO L93 Difference]: Finished difference Result 31544 states and 49009 transitions. [2022-07-21 10:41:35,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 10:41:35,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-07-21 10:41:35,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:41:35,196 INFO L225 Difference]: With dead ends: 31544 [2022-07-21 10:41:35,197 INFO L226 Difference]: Without dead ends: 21441 [2022-07-21 10:41:35,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 10:41:35,228 INFO L413 NwaCegarLoop]: 2604 mSDtfsCounter, 2183 mSDsluCounter, 3375 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 644 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2341 SdHoareTripleChecker+Valid, 5979 SdHoareTripleChecker+Invalid, 1418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 644 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-21 10:41:35,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2341 Valid, 5979 Invalid, 1418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [644 Valid, 773 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-07-21 10:41:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21441 states. [2022-07-21 10:41:35,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21441 to 20110. [2022-07-21 10:41:35,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20110 states, 15132 states have (on average 1.4829500396510706) internal successors, (22440), 15204 states have internal predecessors, (22440), 4177 states have call successors, (4177), 801 states have call predecessors, (4177), 800 states have return successors, (4168), 4136 states have call predecessors, (4168), 4168 states have call successors, (4168) [2022-07-21 10:41:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20110 states to 20110 states and 30785 transitions. [2022-07-21 10:41:35,804 INFO L78 Accepts]: Start accepts. Automaton has 20110 states and 30785 transitions. Word has length 38 [2022-07-21 10:41:35,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:41:35,804 INFO L495 AbstractCegarLoop]: Abstraction has 20110 states and 30785 transitions. [2022-07-21 10:41:35,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 10:41:35,805 INFO L276 IsEmpty]: Start isEmpty. Operand 20110 states and 30785 transitions. [2022-07-21 10:41:35,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 10:41:35,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:41:35,807 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:41:35,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 10:41:35,807 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:41:35,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:41:35,807 INFO L85 PathProgramCache]: Analyzing trace with hash -565338391, now seen corresponding path program 1 times [2022-07-21 10:41:35,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:41:35,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652652255] [2022-07-21 10:41:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:41:35,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:41:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:35,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 10:41:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:36,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:41:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:36,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:41:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 10:41:36,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:41:36,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652652255] [2022-07-21 10:41:36,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652652255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:41:36,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:41:36,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 10:41:36,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443330736] [2022-07-21 10:41:36,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:41:36,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 10:41:36,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:41:36,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 10:41:36,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 10:41:36,015 INFO L87 Difference]: Start difference. First operand 20110 states and 30785 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 10:41:38,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:41:38,311 INFO L93 Difference]: Finished difference Result 62788 states and 97517 transitions. [2022-07-21 10:41:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 10:41:38,311 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-07-21 10:41:38,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:41:38,462 INFO L225 Difference]: With dead ends: 62788 [2022-07-21 10:41:38,462 INFO L226 Difference]: Without dead ends: 42681 [2022-07-21 10:41:38,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 10:41:38,526 INFO L413 NwaCegarLoop]: 2721 mSDtfsCounter, 2180 mSDsluCounter, 3539 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2347 SdHoareTripleChecker+Valid, 6260 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-21 10:41:38,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2347 Valid, 6260 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-21 10:41:38,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42681 states. [2022-07-21 10:41:39,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42681 to 40038. [2022-07-21 10:41:39,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40038 states, 30124 states have (on average 1.4818749170096932) internal successors, (44640), 30260 states have internal predecessors, (44640), 8313 states have call successors, (8313), 1601 states have call predecessors, (8313), 1600 states have return successors, (8304), 8240 states have call predecessors, (8304), 8304 states have call successors, (8304) [2022-07-21 10:41:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40038 states to 40038 states and 61257 transitions. [2022-07-21 10:41:39,640 INFO L78 Accepts]: Start accepts. Automaton has 40038 states and 61257 transitions. Word has length 36 [2022-07-21 10:41:39,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:41:39,640 INFO L495 AbstractCegarLoop]: Abstraction has 40038 states and 61257 transitions. [2022-07-21 10:41:39,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 10:41:39,641 INFO L276 IsEmpty]: Start isEmpty. Operand 40038 states and 61257 transitions. [2022-07-21 10:41:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 10:41:39,642 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:41:39,642 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:41:39,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 10:41:39,642 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:41:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:41:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash 671870231, now seen corresponding path program 1 times [2022-07-21 10:41:39,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:41:39,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814239753] [2022-07-21 10:41:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:41:39,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:41:39,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:39,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-21 10:41:39,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:39,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:41:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:39,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:41:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 10:41:39,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:41:39,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814239753] [2022-07-21 10:41:39,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814239753] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:41:39,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:41:39,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 10:41:39,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741056766] [2022-07-21 10:41:39,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:41:39,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 10:41:39,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:41:39,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 10:41:39,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 10:41:39,822 INFO L87 Difference]: Start difference. First operand 40038 states and 61257 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 10:41:43,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:41:43,013 INFO L93 Difference]: Finished difference Result 125036 states and 194101 transitions. [2022-07-21 10:41:43,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 10:41:43,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-07-21 10:41:43,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:41:43,403 INFO L225 Difference]: With dead ends: 125036 [2022-07-21 10:41:43,403 INFO L226 Difference]: Without dead ends: 85001 [2022-07-21 10:41:43,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 10:41:43,766 INFO L413 NwaCegarLoop]: 2786 mSDtfsCounter, 2176 mSDsluCounter, 3587 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2345 SdHoareTripleChecker+Valid, 6373 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-21 10:41:43,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2345 Valid, 6373 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-21 10:41:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85001 states. [2022-07-21 10:41:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85001 to 79734. [2022-07-21 10:41:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79734 states, 59980 states have (on average 1.480760253417806) internal successors, (88816), 60244 states have internal predecessors, (88816), 16553 states have call successors, (16553), 3201 states have call predecessors, (16553), 3200 states have return successors, (16544), 16416 states have call predecessors, (16544), 16544 states have call successors, (16544) [2022-07-21 10:41:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79734 states to 79734 states and 121913 transitions. [2022-07-21 10:41:46,425 INFO L78 Accepts]: Start accepts. Automaton has 79734 states and 121913 transitions. Word has length 42 [2022-07-21 10:41:46,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:41:46,427 INFO L495 AbstractCegarLoop]: Abstraction has 79734 states and 121913 transitions. [2022-07-21 10:41:46,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 10:41:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 79734 states and 121913 transitions. [2022-07-21 10:41:46,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 10:41:46,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:41:46,430 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:41:46,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 10:41:46,430 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:41:46,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:41:46,430 INFO L85 PathProgramCache]: Analyzing trace with hash -349180151, now seen corresponding path program 1 times [2022-07-21 10:41:46,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:41:46,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678459325] [2022-07-21 10:41:46,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:41:46,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:41:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:46,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-21 10:41:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:46,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:41:46,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:46,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:41:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:41:46,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 10:41:46,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:41:46,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678459325] [2022-07-21 10:41:46,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678459325] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:41:46,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:41:46,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 10:41:46,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954435840] [2022-07-21 10:41:46,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:41:46,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 10:41:46,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:41:46,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 10:41:46,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 10:41:46,848 INFO L87 Difference]: Start difference. First operand 79734 states and 121913 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 10:41:52,035 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 [] [2022-07-21 10:41:53,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:41:53,652 INFO L93 Difference]: Finished difference Result 249052 states and 386405 transitions. [2022-07-21 10:41:53,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 10:41:53,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-07-21 10:41:53,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:41:54,590 INFO L225 Difference]: With dead ends: 249052 [2022-07-21 10:41:54,590 INFO L226 Difference]: Without dead ends: 169321 [2022-07-21 10:41:54,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 10:41:54,870 INFO L413 NwaCegarLoop]: 2798 mSDtfsCounter, 2137 mSDsluCounter, 3537 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 581 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2300 SdHoareTripleChecker+Valid, 6335 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-21 10:41:54,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2300 Valid, 6335 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 781 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-07-21 10:41:54,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169321 states. [2022-07-21 10:41:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169321 to 158806. [2022-07-21 10:41:59,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158806 states, 119436 states have (on average 1.4796208848253458) internal successors, (176720), 119956 states have internal predecessors, (176720), 32969 states have call successors, (32969), 6401 states have call predecessors, (32969), 6400 states have return successors, (32960), 32704 states have call predecessors, (32960), 32960 states have call successors, (32960) [2022-07-21 10:42:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158806 states to 158806 states and 242649 transitions. [2022-07-21 10:42:00,505 INFO L78 Accepts]: Start accepts. Automaton has 158806 states and 242649 transitions. Word has length 45 [2022-07-21 10:42:00,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:42:00,506 INFO L495 AbstractCegarLoop]: Abstraction has 158806 states and 242649 transitions. [2022-07-21 10:42:00,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 10:42:00,506 INFO L276 IsEmpty]: Start isEmpty. Operand 158806 states and 242649 transitions. [2022-07-21 10:42:00,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 10:42:00,507 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:42:00,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:42:00,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 10:42:00,508 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:42:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:42:00,508 INFO L85 PathProgramCache]: Analyzing trace with hash -568430875, now seen corresponding path program 1 times [2022-07-21 10:42:00,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:42:00,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107351612] [2022-07-21 10:42:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:42:00,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:42:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:42:00,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 10:42:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:42:00,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:42:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:42:00,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:42:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:42:00,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 10:42:00,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:42:00,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107351612] [2022-07-21 10:42:00,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107351612] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:42:00,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:42:00,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 10:42:00,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211323427] [2022-07-21 10:42:00,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:42:00,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 10:42:00,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:42:00,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 10:42:00,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 10:42:00,711 INFO L87 Difference]: Start difference. First operand 158806 states and 242649 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 10:42:08,571 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 [] [2022-07-21 10:42:12,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 10:42:12,260 INFO L93 Difference]: Finished difference Result 496636 states and 770181 transitions. [2022-07-21 10:42:12,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 10:42:12,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2022-07-21 10:42:12,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 10:42:13,978 INFO L225 Difference]: With dead ends: 496636 [2022-07-21 10:42:13,978 INFO L226 Difference]: Without dead ends: 337833 [2022-07-21 10:42:15,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 10:42:15,070 INFO L413 NwaCegarLoop]: 2816 mSDtfsCounter, 2141 mSDsluCounter, 3562 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 577 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2310 SdHoareTripleChecker+Valid, 6378 SdHoareTripleChecker+Invalid, 1356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-21 10:42:15,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2310 Valid, 6378 Invalid, 1356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 778 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-07-21 10:42:15,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337833 states. [2022-07-21 10:42:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337833 to 316822. [2022-07-21 10:42:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316822 states, 238220 states have (on average 1.478767525816472) internal successors, (352272), 239252 states have internal predecessors, (352272), 65801 states have call successors, (65801), 12801 states have call predecessors, (65801), 12800 states have return successors, (65792), 65280 states have call predecessors, (65792), 65792 states have call successors, (65792) [2022-07-21 10:42:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316822 states to 316822 states and 483865 transitions. [2022-07-21 10:42:26,514 INFO L78 Accepts]: Start accepts. Automaton has 316822 states and 483865 transitions. Word has length 47 [2022-07-21 10:42:26,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 10:42:26,514 INFO L495 AbstractCegarLoop]: Abstraction has 316822 states and 483865 transitions. [2022-07-21 10:42:26,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 10:42:26,515 INFO L276 IsEmpty]: Start isEmpty. Operand 316822 states and 483865 transitions. [2022-07-21 10:42:26,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 10:42:26,516 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 10:42:26,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 10:42:26,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 10:42:26,516 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 10:42:26,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 10:42:26,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1515914313, now seen corresponding path program 1 times [2022-07-21 10:42:26,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 10:42:26,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773229587] [2022-07-21 10:42:26,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 10:42:26,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 10:42:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:42:26,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-21 10:42:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:42:26,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:42:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:42:26,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-21 10:42:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 10:42:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 10:42:26,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 10:42:26,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773229587] [2022-07-21 10:42:26,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773229587] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 10:42:26,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 10:42:26,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 10:42:26,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098551762] [2022-07-21 10:42:26,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 10:42:26,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 10:42:26,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 10:42:26,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 10:42:26,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 10:42:26,702 INFO L87 Difference]: Start difference. First operand 316822 states and 483865 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3)