./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_drivers-net-ethernet-sun-cassini.cil.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 173e3943 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_drivers-net-ethernet-sun-cassini.cil.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 232e8c8bdb70ee1ad9fec7edefe8ce3076fc3bc6f131163eee7a33dd2ac504a2 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 18:41:27,310 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 18:41:27,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 18:41:27,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 18:41:27,350 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 18:41:27,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 18:41:27,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 18:41:27,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 18:41:27,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 18:41:27,361 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 18:41:27,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 18:41:27,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 18:41:27,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 18:41:27,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 18:41:27,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 18:41:27,371 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 18:41:27,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 18:41:27,372 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 18:41:27,374 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 18:41:27,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 18:41:27,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 18:41:27,379 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 18:41:27,381 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 18:41:27,381 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 18:41:27,385 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 18:41:27,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 18:41:27,388 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 18:41:27,389 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 18:41:27,390 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 18:41:27,390 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 18:41:27,390 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 18:41:27,391 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 18:41:27,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 18:41:27,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 18:41:27,393 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 18:41:27,393 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 18:41:27,394 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 18:41:27,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 18:41:27,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 18:41:27,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 18:41:27,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 18:41:27,396 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 18:41:27,414 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 18:41:27,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 18:41:27,418 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 18:41:27,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 18:41:27,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 18:41:27,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 18:41:27,419 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 18:41:27,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 18:41:27,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 18:41:27,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 18:41:27,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 18:41:27,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 18:41:27,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 18:41:27,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 18:41:27,421 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 18:41:27,421 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 18:41:27,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 18:41:27,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 18:41:27,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 18:41:27,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 18:41:27,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 18:41:27,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 18:41:27,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 18:41:27,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 18:41:27,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 18:41:27,422 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 18:41:27,422 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 18:41:27,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 18:41:27,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 18:41:27,423 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 232e8c8bdb70ee1ad9fec7edefe8ce3076fc3bc6f131163eee7a33dd2ac504a2 [2021-11-06 18:41:27,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 18:41:27,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 18:41:27,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 18:41:27,633 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 18:41:27,643 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 18:41:27,644 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_drivers-net-ethernet-sun-cassini.cil.i [2021-11-06 18:41:27,705 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b7dd44d9/0a2d8143aa4746248098943d19770706/FLAG4631b2c97 [2021-11-06 18:41:28,495 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 18:41:28,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_drivers-net-ethernet-sun-cassini.cil.i [2021-11-06 18:41:28,545 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b7dd44d9/0a2d8143aa4746248098943d19770706/FLAG4631b2c97 [2021-11-06 18:41:28,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b7dd44d9/0a2d8143aa4746248098943d19770706 [2021-11-06 18:41:28,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 18:41:28,681 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 18:41:28,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 18:41:28,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 18:41:28,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 18:41:28,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:41:28" (1/1) ... [2021-11-06 18:41:28,694 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2394642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:28, skipping insertion in model container [2021-11-06 18:41:28,694 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:41:28" (1/1) ... [2021-11-06 18:41:28,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 18:41:28,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 18:41:31,740 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_drivers-net-ethernet-sun-cassini.cil.i[445023,445036] [2021-11-06 18:41:31,742 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_drivers-net-ethernet-sun-cassini.cil.i[445189,445202] [2021-11-06 18:41:31,743 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_drivers-net-ethernet-sun-cassini.cil.i[445353,445366] [2021-11-06 18:41:31,743 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_drivers-net-ethernet-sun-cassini.cil.i[445518,445531] [2021-11-06 18:41:31,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 18:41:31,820 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 18:41:32,142 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_drivers-net-ethernet-sun-cassini.cil.i[445023,445036] [2021-11-06 18:41:32,143 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_drivers-net-ethernet-sun-cassini.cil.i[445189,445202] [2021-11-06 18:41:32,143 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_drivers-net-ethernet-sun-cassini.cil.i[445353,445366] [2021-11-06 18:41:32,143 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.14/linux-3.14_complex_emg_linux-kernel-locking-mutex_drivers-net-ethernet-sun-cassini.cil.i[445518,445531] [2021-11-06 18:41:32,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 18:41:32,305 INFO L208 MainTranslator]: Completed translation [2021-11-06 18:41:32,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:32 WrapperNode [2021-11-06 18:41:32,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 18:41:32,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 18:41:32,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 18:41:32,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 18:41:32,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:32" (1/1) ... [2021-11-06 18:41:32,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:32" (1/1) ... [2021-11-06 18:41:34,708 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 18:41:34,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 18:41:34,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 18:41:34,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 18:41:34,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:32" (1/1) ... [2021-11-06 18:41:34,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:32" (1/1) ... [2021-11-06 18:41:35,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:32" (1/1) ... [2021-11-06 18:41:35,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:32" (1/1) ... [2021-11-06 18:41:36,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:32" (1/1) ... [2021-11-06 18:41:36,637 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:32" (1/1) ... [2021-11-06 18:41:36,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:32" (1/1) ... [2021-11-06 18:41:37,149 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 18:41:37,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 18:41:37,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 18:41:37,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 18:41:37,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:32" (1/1) ... [2021-11-06 18:41:37,157 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 18:41:37,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 18:41:37,177 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-06 18:41:37,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-06 18:41:37,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 18:41:37,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 18:41:37,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 18:41:37,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 18:41:37,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 18:41:37,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 18:41:37,205 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-06 18:41:37,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 18:41:37,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 18:41:37,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 18:41:37,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 18:41:37,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 18:41:37,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 18:41:37,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 18:41:37,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 18:41:37,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 18:48:41,645 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break#2: ldv_switch_1_#res := 0; [2021-11-06 18:48:41,646 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break#3: ldv_switch_1_#res := 0; [2021-11-06 18:48:41,646 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break: ldv_switch_1_#res := 0; [2021-11-06 18:48:41,646 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break#2: ldv_switch_0_#res := 0; [2021-11-06 18:48:41,647 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-06 18:48:41,647 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break: ldv_switch_0_#res := 0; [2021-11-06 18:48:41,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 18:48:41,703 INFO L299 CfgBuilder]: Removed 22558 assume(true) statements. [2021-11-06 18:48:41,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:48:41 BoogieIcfgContainer [2021-11-06 18:48:41,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 18:48:41,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 18:48:41,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 18:48:41,722 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 18:48:41,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:41:28" (1/3) ... [2021-11-06 18:48:41,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e090c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:48:41, skipping insertion in model container [2021-11-06 18:48:41,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:41:32" (2/3) ... [2021-11-06 18:48:41,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e090c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:48:41, skipping insertion in model container [2021-11-06 18:48:41,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:48:41" (3/3) ... [2021-11-06 18:48:41,724 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-mutex_drivers-net-ethernet-sun-cassini.cil.i [2021-11-06 18:48:41,731 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 18:48:41,731 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2021-11-06 18:48:41,798 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 18:48:41,803 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-06 18:48:41,803 INFO L340 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2021-11-06 18:48:41,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 19678 states, 19644 states have (on average 1.313021787823254) internal successors, (25793), 19677 states have internal predecessors, (25793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:48:41,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-06 18:48:41,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 18:48:41,961 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 18:48:41,961 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2021-11-06 18:48:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 18:48:41,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1947774779, now seen corresponding path program 1 times [2021-11-06 18:48:41,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 18:48:41,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633826375] [2021-11-06 18:48:41,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 18:48:41,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 18:48:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 18:48:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 18:48:42,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 18:48:42,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633826375] [2021-11-06 18:48:42,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633826375] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 18:48:42,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 18:48:42,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 18:48:42,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688482368] [2021-11-06 18:48:42,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 18:48:42,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 18:48:42,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 18:48:42,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 18:48:42,715 INFO L87 Difference]: Start difference. First operand has 19678 states, 19644 states have (on average 1.313021787823254) internal successors, (25793), 19677 states have internal predecessors, (25793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:48:45,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 18:48:45,894 INFO L93 Difference]: Finished difference Result 58112 states and 75889 transitions. [2021-11-06 18:48:45,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 18:48:45,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-06 18:48:45,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 18:48:46,055 INFO L225 Difference]: With dead ends: 58112 [2021-11-06 18:48:46,056 INFO L226 Difference]: Without dead ends: 37929 [2021-11-06 18:48:46,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 18:48:46,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37929 states. [2021-11-06 18:48:47,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37929 to 37877. [2021-11-06 18:48:47,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37877 states, 37843 states have (on average 1.279734693338266) internal successors, (48429), 37876 states have internal predecessors, (48429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:48:47,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37877 states to 37877 states and 48429 transitions. [2021-11-06 18:48:47,518 INFO L78 Accepts]: Start accepts. Automaton has 37877 states and 48429 transitions. Word has length 51 [2021-11-06 18:48:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 18:48:47,519 INFO L470 AbstractCegarLoop]: Abstraction has 37877 states and 48429 transitions. [2021-11-06 18:48:47,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:48:47,520 INFO L276 IsEmpty]: Start isEmpty. Operand 37877 states and 48429 transitions. [2021-11-06 18:48:47,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-06 18:48:47,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 18:48:47,527 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 18:48:47,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 18:48:47,527 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2021-11-06 18:48:47,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 18:48:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash -841760609, now seen corresponding path program 1 times [2021-11-06 18:48:47,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 18:48:47,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311651064] [2021-11-06 18:48:47,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 18:48:47,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 18:48:47,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 18:48:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 18:48:48,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 18:48:48,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311651064] [2021-11-06 18:48:48,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311651064] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 18:48:48,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 18:48:48,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 18:48:48,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246120176] [2021-11-06 18:48:48,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 18:48:48,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 18:48:48,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 18:48:48,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 18:48:48,035 INFO L87 Difference]: Start difference. First operand 37877 states and 48429 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:48:51,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 18:48:51,128 INFO L93 Difference]: Finished difference Result 67693 states and 86891 transitions. [2021-11-06 18:48:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 18:48:51,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-06 18:48:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 18:48:51,204 INFO L225 Difference]: With dead ends: 67693 [2021-11-06 18:48:51,204 INFO L226 Difference]: Without dead ends: 29916 [2021-11-06 18:48:51,271 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 18:48:51,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29916 states. [2021-11-06 18:48:51,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29916 to 29882. [2021-11-06 18:48:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29882 states, 29848 states have (on average 1.2902372018225676) internal successors, (38511), 29881 states have internal predecessors, (38511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:48:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29882 states to 29882 states and 38511 transitions. [2021-11-06 18:48:52,174 INFO L78 Accepts]: Start accepts. Automaton has 29882 states and 38511 transitions. Word has length 61 [2021-11-06 18:48:52,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 18:48:52,175 INFO L470 AbstractCegarLoop]: Abstraction has 29882 states and 38511 transitions. [2021-11-06 18:48:52,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:48:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 29882 states and 38511 transitions. [2021-11-06 18:48:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-06 18:48:52,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 18:48:52,178 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 18:48:52,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 18:48:52,182 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2021-11-06 18:48:52,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 18:48:52,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1817104897, now seen corresponding path program 1 times [2021-11-06 18:48:52,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 18:48:52,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080383373] [2021-11-06 18:48:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 18:48:52,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 18:48:52,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 18:48:52,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 18:48:52,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 18:48:52,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080383373] [2021-11-06 18:48:52,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080383373] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 18:48:52,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 18:48:52,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 18:48:52,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325787485] [2021-11-06 18:48:52,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 18:48:52,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 18:48:52,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 18:48:52,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 18:48:52,470 INFO L87 Difference]: Start difference. First operand 29882 states and 38511 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:48:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 18:48:55,922 INFO L93 Difference]: Finished difference Result 75462 states and 97069 transitions. [2021-11-06 18:48:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 18:48:55,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-06 18:48:55,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 18:48:56,007 INFO L225 Difference]: With dead ends: 75462 [2021-11-06 18:48:56,007 INFO L226 Difference]: Without dead ends: 45680 [2021-11-06 18:48:56,050 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 18:48:56,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45680 states. [2021-11-06 18:48:56,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45680 to 43720. [2021-11-06 18:48:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43720 states, 43686 states have (on average 1.287346060522822) internal successors, (56239), 43719 states have internal predecessors, (56239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:48:56,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43720 states to 43720 states and 56239 transitions. [2021-11-06 18:48:56,893 INFO L78 Accepts]: Start accepts. Automaton has 43720 states and 56239 transitions. Word has length 66 [2021-11-06 18:48:56,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 18:48:56,894 INFO L470 AbstractCegarLoop]: Abstraction has 43720 states and 56239 transitions. [2021-11-06 18:48:56,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:48:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 43720 states and 56239 transitions. [2021-11-06 18:48:56,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-06 18:48:56,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 18:48:56,897 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 18:48:56,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 18:48:56,898 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2021-11-06 18:48:56,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 18:48:56,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1385227923, now seen corresponding path program 1 times [2021-11-06 18:48:56,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 18:48:56,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429115247] [2021-11-06 18:48:56,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 18:48:56,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 18:48:57,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 18:48:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-06 18:48:57,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 18:48:57,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429115247] [2021-11-06 18:48:57,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429115247] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 18:48:57,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 18:48:57,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 18:48:57,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089477263] [2021-11-06 18:48:57,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 18:48:57,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 18:48:57,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 18:48:57,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 18:48:57,430 INFO L87 Difference]: Start difference. First operand 43720 states and 56239 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:49:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 18:49:00,930 INFO L93 Difference]: Finished difference Result 125512 states and 161365 transitions. [2021-11-06 18:49:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 18:49:00,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-06 18:49:00,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 18:49:01,070 INFO L225 Difference]: With dead ends: 125512 [2021-11-06 18:49:01,071 INFO L226 Difference]: Without dead ends: 84546 [2021-11-06 18:49:01,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 18:49:01,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84546 states. [2021-11-06 18:49:02,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84546 to 84488. [2021-11-06 18:49:02,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84488 states, 84454 states have (on average 1.2869372676249793) internal successors, (108687), 84487 states have internal predecessors, (108687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:49:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84488 states to 84488 states and 108687 transitions. [2021-11-06 18:49:02,656 INFO L78 Accepts]: Start accepts. Automaton has 84488 states and 108687 transitions. Word has length 78 [2021-11-06 18:49:02,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 18:49:02,656 INFO L470 AbstractCegarLoop]: Abstraction has 84488 states and 108687 transitions. [2021-11-06 18:49:02,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:49:02,657 INFO L276 IsEmpty]: Start isEmpty. Operand 84488 states and 108687 transitions. [2021-11-06 18:49:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-06 18:49:02,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 18:49:02,658 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 18:49:02,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 18:49:02,659 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2021-11-06 18:49:02,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 18:49:02,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1127062485, now seen corresponding path program 1 times [2021-11-06 18:49:02,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 18:49:02,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978277018] [2021-11-06 18:49:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 18:49:02,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 18:49:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 18:49:03,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 18:49:03,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 18:49:03,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978277018] [2021-11-06 18:49:03,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978277018] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 18:49:03,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 18:49:03,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 18:49:03,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076526647] [2021-11-06 18:49:03,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 18:49:03,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 18:49:03,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 18:49:03,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 18:49:03,100 INFO L87 Difference]: Start difference. First operand 84488 states and 108687 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:49:04,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 18:49:04,461 INFO L93 Difference]: Finished difference Result 84488 states and 108687 transitions. [2021-11-06 18:49:04,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 18:49:04,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-06 18:49:04,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 18:49:04,586 INFO L225 Difference]: With dead ends: 84488 [2021-11-06 18:49:04,586 INFO L226 Difference]: Without dead ends: 84484 [2021-11-06 18:49:04,613 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 18:49:04,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84484 states. [2021-11-06 18:49:06,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84484 to 84484. [2021-11-06 18:49:06,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84484 states, 84452 states have (on average 1.286920380808033) internal successors, (108683), 84483 states have internal predecessors, (108683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:49:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84484 states to 84484 states and 108683 transitions. [2021-11-06 18:49:06,292 INFO L78 Accepts]: Start accepts. Automaton has 84484 states and 108683 transitions. Word has length 78 [2021-11-06 18:49:06,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 18:49:06,293 INFO L470 AbstractCegarLoop]: Abstraction has 84484 states and 108683 transitions. [2021-11-06 18:49:06,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:49:06,293 INFO L276 IsEmpty]: Start isEmpty. Operand 84484 states and 108683 transitions. [2021-11-06 18:49:06,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-06 18:49:06,295 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 18:49:06,295 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-06 18:49:06,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 18:49:06,296 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 31 more)] === [2021-11-06 18:49:06,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 18:49:06,296 INFO L85 PathProgramCache]: Analyzing trace with hash -775149330, now seen corresponding path program 1 times [2021-11-06 18:49:06,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 18:49:06,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757429798] [2021-11-06 18:49:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 18:49:06,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 18:49:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 18:49:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-06 18:49:06,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 18:49:06,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757429798] [2021-11-06 18:49:06,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757429798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 18:49:06,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 18:49:06,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-06 18:49:06,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520141842] [2021-11-06 18:49:06,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 18:49:06,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 18:49:06,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 18:49:06,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 18:49:06,899 INFO L87 Difference]: Start difference. First operand 84484 states and 108683 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-06 18:49:08,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 18:49:08,285 INFO L93 Difference]: Finished difference Result 84484 states and 108683 transitions. [2021-11-06 18:49:08,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 18:49:08,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-06 18:49:08,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 18:49:08,443 INFO L225 Difference]: With dead ends: 84484 [2021-11-06 18:49:08,559 INFO L226 Difference]: Without dead ends: 84480 [2021-11-06 18:49:08,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-06 18:49:08,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84480 states.