./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.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 3fe54d83d46de95e8e0767545626d085bd64ef94fa067827f6d89c4bc8eb39d0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-173e394 [2021-11-06 20:40:24,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-06 20:40:24,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-06 20:40:24,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-06 20:40:24,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-06 20:40:24,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-06 20:40:24,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-06 20:40:24,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-06 20:40:24,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-06 20:40:24,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-06 20:40:24,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-06 20:40:24,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-06 20:40:24,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-06 20:40:24,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-06 20:40:24,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-06 20:40:24,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-06 20:40:24,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-06 20:40:24,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-06 20:40:24,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-06 20:40:24,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-06 20:40:24,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-06 20:40:24,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-06 20:40:24,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-06 20:40:24,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-06 20:40:24,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-06 20:40:24,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-06 20:40:24,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-06 20:40:24,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-06 20:40:24,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-06 20:40:24,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-06 20:40:24,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-06 20:40:24,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-06 20:40:24,290 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-06 20:40:24,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-06 20:40:24,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-06 20:40:24,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-06 20:40:24,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-06 20:40:24,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-06 20:40:24,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-06 20:40:24,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-06 20:40:24,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-06 20:40:24,296 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-06 20:40:24,318 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-06 20:40:24,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-06 20:40:24,318 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-06 20:40:24,319 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-06 20:40:24,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-06 20:40:24,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-06 20:40:24,320 INFO L138 SettingsManager]: * Use SBE=true [2021-11-06 20:40:24,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-06 20:40:24,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-06 20:40:24,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-06 20:40:24,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-06 20:40:24,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-06 20:40:24,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-06 20:40:24,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-06 20:40:24,322 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-06 20:40:24,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-06 20:40:24,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-06 20:40:24,323 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-06 20:40:24,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-06 20:40:24,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 20:40:24,324 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-06 20:40:24,324 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-06 20:40:24,324 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-06 20:40:24,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-06 20:40:24,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-06 20:40:24,325 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-06 20:40:24,325 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-06 20:40:24,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-06 20:40:24,325 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-06 20:40:24,326 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3fe54d83d46de95e8e0767545626d085bd64ef94fa067827f6d89c4bc8eb39d0 [2021-11-06 20:40:24,511 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-06 20:40:24,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-06 20:40:24,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-06 20:40:24,544 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-06 20:40:24,551 INFO L275 PluginConnector]: CDTParser initialized [2021-11-06 20:40:24,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i [2021-11-06 20:40:24,612 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29bfccbc4/eb10c062904d42a5a296289d52729490/FLAG4ea62325e [2021-11-06 20:40:25,375 INFO L306 CDTParser]: Found 1 translation units. [2021-11-06 20:40:25,376 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i [2021-11-06 20:40:25,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29bfccbc4/eb10c062904d42a5a296289d52729490/FLAG4ea62325e [2021-11-06 20:40:25,924 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29bfccbc4/eb10c062904d42a5a296289d52729490 [2021-11-06 20:40:25,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-06 20:40:25,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-06 20:40:25,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-06 20:40:25,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-06 20:40:25,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-06 20:40:25,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:40:25" (1/1) ... [2021-11-06 20:40:25,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fd6860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:40:25, skipping insertion in model container [2021-11-06 20:40:25,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:40:25" (1/1) ... [2021-11-06 20:40:25,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-06 20:40:26,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-06 20:40:28,237 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358326,358339] [2021-11-06 20:40:28,240 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358495,358508] [2021-11-06 20:40:28,241 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358662,358675] [2021-11-06 20:40:28,242 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358830,358843] [2021-11-06 20:40:28,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 20:40:28,322 INFO L203 MainTranslator]: Completed pre-run [2021-11-06 20:40:28,667 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358326,358339] [2021-11-06 20:40:28,668 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358495,358508] [2021-11-06 20:40:28,669 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358662,358675] [2021-11-06 20:40:28,669 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-challenges/linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i[358830,358843] [2021-11-06 20:40:28,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-06 20:40:28,867 INFO L208 MainTranslator]: Completed translation [2021-11-06 20:40:28,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:40:28 WrapperNode [2021-11-06 20:40:28,868 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-06 20:40:28,869 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-06 20:40:28,869 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-06 20:40:28,869 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-06 20:40:28,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:40:28" (1/1) ... [2021-11-06 20:40:28,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:40:28" (1/1) ... [2021-11-06 20:40:32,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-06 20:40:32,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-06 20:40:32,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-06 20:40:32,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-06 20:40:32,036 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:40:28" (1/1) ... [2021-11-06 20:40:32,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:40:28" (1/1) ... [2021-11-06 20:40:32,620 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:40:28" (1/1) ... [2021-11-06 20:40:32,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:40:28" (1/1) ... [2021-11-06 20:40:34,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:40:28" (1/1) ... [2021-11-06 20:40:34,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:40:28" (1/1) ... [2021-11-06 20:40:35,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:40:28" (1/1) ... [2021-11-06 20:40:35,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-06 20:40:35,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-06 20:40:35,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-06 20:40:35,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-06 20:40:35,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:40:28" (1/1) ... [2021-11-06 20:40:35,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-06 20:40:35,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-06 20:40:35,888 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 20:40:35,912 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 20:40:35,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-06 20:40:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-06 20:40:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-06 20:40:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-06 20:40:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-06 20:40:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-06 20:40:35,927 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-06 20:40:35,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-06 20:40:35,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-06 20:40:35,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-06 20:40:35,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-06 20:40:35,928 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-06 20:40:35,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-06 20:40:35,929 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-06 20:40:35,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-06 20:40:35,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-06 20:40:35,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-06 20:48:15,360 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break#2: ldv_switch_1_#res := 0; [2021-11-06 20:48:15,361 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break#2: ldv_switch_2_#res := 0; [2021-11-06 20:48:15,361 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break#3: ldv_switch_2_#res := 0; [2021-11-06 20:48:15,361 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break#4: ldv_switch_2_#res := 0; [2021-11-06 20:48:15,361 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_1_switch_break: ldv_switch_1_#res := 0; [2021-11-06 20:48:15,362 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_2_switch_break: ldv_switch_2_#res := 0; [2021-11-06 20:48:15,365 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ULTIMATE.startFINAL: assume true; [2021-11-06 20:48:15,366 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_0_switch_break: ldv_switch_0_#res := 0; [2021-11-06 20:48:15,371 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_switch_3_switch_break: ldv_switch_3_#res := 0; [2021-11-06 20:48:15,471 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-06 20:48:15,471 INFO L299 CfgBuilder]: Removed 26179 assume(true) statements. [2021-11-06 20:48:15,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:48:15 BoogieIcfgContainer [2021-11-06 20:48:15,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-06 20:48:15,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-06 20:48:15,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-06 20:48:15,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-06 20:48:15,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:40:25" (1/3) ... [2021-11-06 20:48:15,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631aaebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:48:15, skipping insertion in model container [2021-11-06 20:48:15,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:40:28" (2/3) ... [2021-11-06 20:48:15,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@631aaebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:48:15, skipping insertion in model container [2021-11-06 20:48:15,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:48:15" (3/3) ... [2021-11-06 20:48:15,498 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.14_complex_emg_linux-kernel-locking-spinlock_drivers-net-ethernet-calxeda-xgmac.cil.i [2021-11-06 20:48:15,502 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-06 20:48:15,502 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 98 error locations. [2021-11-06 20:48:15,620 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-06 20:48:15,629 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 20:48:15,629 INFO L340 AbstractCegarLoop]: Starting to check reachability of 98 error locations. [2021-11-06 20:48:15,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 21706 states, 21608 states have (on average 1.3174750092558312) internal successors, (28468), 21705 states have internal predecessors, (28468), 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 20:48:15,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-06 20:48:15,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:48:15,907 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] [2021-11-06 20:48:15,909 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 95 more)] === [2021-11-06 20:48:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:48:15,914 INFO L85 PathProgramCache]: Analyzing trace with hash 2076032475, now seen corresponding path program 1 times [2021-11-06 20:48:15,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:48:15,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650772376] [2021-11-06 20:48:15,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:48:15,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:48:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:48:17,017 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 20:48:17,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:48:17,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650772376] [2021-11-06 20:48:17,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650772376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:48:17,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:48:17,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:48:17,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907321362] [2021-11-06 20:48:17,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 20:48:17,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:48:17,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 20:48:17,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 20:48:17,081 INFO L87 Difference]: Start difference. First operand has 21706 states, 21608 states have (on average 1.3174750092558312) internal successors, (28468), 21705 states have internal predecessors, (28468), 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 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 20:48:20,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:48:20,615 INFO L93 Difference]: Finished difference Result 63170 states and 82363 transitions. [2021-11-06 20:48:20,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 20:48:20,617 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 54 [2021-11-06 20:48:20,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:48:20,799 INFO L225 Difference]: With dead ends: 63170 [2021-11-06 20:48:20,799 INFO L226 Difference]: Without dead ends: 39797 [2021-11-06 20:48:20,867 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 20:48:20,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39797 states. [2021-11-06 20:48:21,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39797 to 39649. [2021-11-06 20:48:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39649 states, 39551 states have (on average 1.2440140577987915) internal successors, (49202), 39648 states have internal predecessors, (49202), 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 20:48:22,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39649 states to 39649 states and 49202 transitions. [2021-11-06 20:48:22,131 INFO L78 Accepts]: Start accepts. Automaton has 39649 states and 49202 transitions. Word has length 54 [2021-11-06 20:48:22,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 20:48:22,132 INFO L470 AbstractCegarLoop]: Abstraction has 39649 states and 49202 transitions. [2021-11-06 20:48:22,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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 20:48:22,133 INFO L276 IsEmpty]: Start isEmpty. Operand 39649 states and 49202 transitions. [2021-11-06 20:48:22,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-06 20:48:22,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:48:22,143 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 20:48:22,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-06 20:48:22,144 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 95 more)] === [2021-11-06 20:48:22,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:48:22,146 INFO L85 PathProgramCache]: Analyzing trace with hash 870021849, now seen corresponding path program 1 times [2021-11-06 20:48:22,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:48:22,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170529989] [2021-11-06 20:48:22,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:48:22,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:48:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:48:22,872 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 20:48:22,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:48:22,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170529989] [2021-11-06 20:48:22,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170529989] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:48:22,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:48:22,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:48:22,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909441790] [2021-11-06 20:48:22,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 20:48:22,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:48:22,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 20:48:22,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 20:48:22,878 INFO L87 Difference]: Start difference. First operand 39649 states and 49202 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 20:48:26,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:48:26,547 INFO L93 Difference]: Finished difference Result 82653 states and 102662 transitions. [2021-11-06 20:48:26,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 20:48:26,548 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 20:48:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:48:26,643 INFO L225 Difference]: With dead ends: 82653 [2021-11-06 20:48:26,644 INFO L226 Difference]: Without dead ends: 43112 [2021-11-06 20:48:26,719 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 20:48:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43112 states. [2021-11-06 20:48:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43112 to 42982. [2021-11-06 20:48:27,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42982 states, 42884 states have (on average 1.245242981065199) internal successors, (53401), 42981 states have internal predecessors, (53401), 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 20:48:27,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42982 states to 42982 states and 53401 transitions. [2021-11-06 20:48:27,819 INFO L78 Accepts]: Start accepts. Automaton has 42982 states and 53401 transitions. Word has length 66 [2021-11-06 20:48:27,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 20:48:27,820 INFO L470 AbstractCegarLoop]: Abstraction has 42982 states and 53401 transitions. [2021-11-06 20:48:27,821 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 20:48:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand 42982 states and 53401 transitions. [2021-11-06 20:48:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-06 20:48:27,829 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:48:27,829 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, 1, 1] [2021-11-06 20:48:27,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-06 20:48:27,829 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 95 more)] === [2021-11-06 20:48:27,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:48:27,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1307749619, now seen corresponding path program 1 times [2021-11-06 20:48:27,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:48:27,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497076872] [2021-11-06 20:48:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:48:27,831 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:48:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:48:28,284 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 20:48:28,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:48:28,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497076872] [2021-11-06 20:48:28,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497076872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:48:28,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:48:28,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:48:28,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117009308] [2021-11-06 20:48:28,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-06 20:48:28,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:48:28,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-06 20:48:28,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-06 20:48:28,287 INFO L87 Difference]: Start difference. First operand 42982 states and 53401 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 20:48:32,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:48:32,243 INFO L93 Difference]: Finished difference Result 124730 states and 154993 transitions. [2021-11-06 20:48:32,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-06 20:48:32,244 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2021-11-06 20:48:32,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:48:32,470 INFO L225 Difference]: With dead ends: 124730 [2021-11-06 20:48:32,471 INFO L226 Difference]: Without dead ends: 81856 [2021-11-06 20:48:32,565 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 20:48:32,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81856 states. [2021-11-06 20:48:34,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81856 to 75154. [2021-11-06 20:48:34,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75154 states, 75056 states have (on average 1.248334576849286) internal successors, (93695), 75153 states have internal predecessors, (93695), 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 20:48:34,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75154 states to 75154 states and 93695 transitions. [2021-11-06 20:48:34,259 INFO L78 Accepts]: Start accepts. Automaton has 75154 states and 93695 transitions. Word has length 68 [2021-11-06 20:48:34,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 20:48:34,260 INFO L470 AbstractCegarLoop]: Abstraction has 75154 states and 93695 transitions. [2021-11-06 20:48:34,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 20:48:34,261 INFO L276 IsEmpty]: Start isEmpty. Operand 75154 states and 93695 transitions. [2021-11-06 20:48:34,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-06 20:48:34,262 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:48:34,263 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] [2021-11-06 20:48:34,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-06 20:48:34,263 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 95 more)] === [2021-11-06 20:48:34,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:48:34,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1968770093, now seen corresponding path program 1 times [2021-11-06 20:48:34,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:48:34,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648723242] [2021-11-06 20:48:34,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:48:34,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:48:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:48:35,104 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 20:48:35,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:48:35,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648723242] [2021-11-06 20:48:35,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648723242] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:48:35,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:48:35,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:48:35,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415481167] [2021-11-06 20:48:35,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 20:48:35,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:48:35,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 20:48:35,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 20:48:35,106 INFO L87 Difference]: Start difference. First operand 75154 states and 93695 transitions. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 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 20:48:37,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:48:37,362 INFO L93 Difference]: Finished difference Result 75154 states and 93695 transitions. [2021-11-06 20:48:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 20:48:37,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 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 79 [2021-11-06 20:48:37,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:48:37,510 INFO L225 Difference]: With dead ends: 75154 [2021-11-06 20:48:37,510 INFO L226 Difference]: Without dead ends: 75150 [2021-11-06 20:48:37,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 20:48:37,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75150 states. [2021-11-06 20:48:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75150 to 75150. [2021-11-06 20:48:38,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75150 states, 75054 states have (on average 1.2483145468595944) internal successors, (93691), 75149 states have internal predecessors, (93691), 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 20:48:39,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75150 states to 75150 states and 93691 transitions. [2021-11-06 20:48:39,053 INFO L78 Accepts]: Start accepts. Automaton has 75150 states and 93691 transitions. Word has length 79 [2021-11-06 20:48:39,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 20:48:39,053 INFO L470 AbstractCegarLoop]: Abstraction has 75150 states and 93691 transitions. [2021-11-06 20:48:39,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 3 states have internal predecessors, (74), 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 20:48:39,054 INFO L276 IsEmpty]: Start isEmpty. Operand 75150 states and 93691 transitions. [2021-11-06 20:48:39,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-06 20:48:39,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:48:39,056 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, 1] [2021-11-06 20:48:39,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-06 20:48:39,057 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 95 more)] === [2021-11-06 20:48:39,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:48:39,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2092661910, now seen corresponding path program 1 times [2021-11-06 20:48:39,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:48:39,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129627572] [2021-11-06 20:48:39,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:48:39,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:48:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:48:39,563 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 20:48:39,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:48:39,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129627572] [2021-11-06 20:48:39,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129627572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:48:39,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:48:39,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:48:39,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898774598] [2021-11-06 20:48:39,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 20:48:39,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:48:39,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 20:48:39,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 20:48:39,566 INFO L87 Difference]: Start difference. First operand 75150 states and 93691 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 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 20:48:41,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-06 20:48:41,177 INFO L93 Difference]: Finished difference Result 75150 states and 93691 transitions. [2021-11-06 20:48:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-06 20:48:41,177 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 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 81 [2021-11-06 20:48:41,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-06 20:48:41,315 INFO L225 Difference]: With dead ends: 75150 [2021-11-06 20:48:41,316 INFO L226 Difference]: Without dead ends: 75146 [2021-11-06 20:48:41,349 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 20:48:41,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75146 states. [2021-11-06 20:48:42,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75146 to 75146. [2021-11-06 20:48:42,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75146 states, 75052 states have (on average 1.248294515802377) internal successors, (93687), 75145 states have internal predecessors, (93687), 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 20:48:43,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75146 states to 75146 states and 93687 transitions. [2021-11-06 20:48:43,092 INFO L78 Accepts]: Start accepts. Automaton has 75146 states and 93687 transitions. Word has length 81 [2021-11-06 20:48:43,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-06 20:48:43,092 INFO L470 AbstractCegarLoop]: Abstraction has 75146 states and 93687 transitions. [2021-11-06 20:48:43,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 3 states have internal predecessors, (76), 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 20:48:43,093 INFO L276 IsEmpty]: Start isEmpty. Operand 75146 states and 93687 transitions. [2021-11-06 20:48:43,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-06 20:48:43,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-06 20:48:43,095 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, 1, 1, 1] [2021-11-06 20:48:43,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-06 20:48:43,095 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 95 more)] === [2021-11-06 20:48:43,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-06 20:48:43,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1003545049, now seen corresponding path program 1 times [2021-11-06 20:48:43,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-06 20:48:43,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289297196] [2021-11-06 20:48:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-06 20:48:43,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-06 20:48:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-06 20:48:43,595 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 20:48:43,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-06 20:48:43,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289297196] [2021-11-06 20:48:43,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289297196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-06 20:48:43,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-06 20:48:43,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-06 20:48:43,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687735651] [2021-11-06 20:48:43,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-06 20:48:43,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-06 20:48:43,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-06 20:48:43,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-06 20:48:43,597 INFO L87 Difference]: Start difference. First operand 75146 states and 93687 transitions. Second operand has 4 states, 4 states have (on average 19.5) 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)