./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash cb4cf2f7b619bb65636b8158cc0f6ae5cf90699f1f1c19bf802021a20c422d2c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 16:10:37,840 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 16:10:37,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 16:10:37,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 16:10:37,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 16:10:37,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 16:10:37,890 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 16:10:37,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 16:10:37,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 16:10:37,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 16:10:37,896 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 16:10:37,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 16:10:37,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 16:10:37,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 16:10:37,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 16:10:37,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 16:10:37,904 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 16:10:37,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 16:10:37,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 16:10:37,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 16:10:37,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 16:10:37,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 16:10:37,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 16:10:37,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 16:10:37,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 16:10:37,923 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 16:10:37,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 16:10:37,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 16:10:37,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 16:10:37,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 16:10:37,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 16:10:37,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 16:10:37,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 16:10:37,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 16:10:37,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 16:10:37,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 16:10:37,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 16:10:37,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 16:10:37,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 16:10:37,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 16:10:37,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 16:10:37,934 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 16:10:37,956 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 16:10:37,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 16:10:37,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 16:10:37,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 16:10:37,958 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 16:10:37,958 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 16:10:37,959 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 16:10:37,959 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 16:10:37,959 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 16:10:37,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 16:10:37,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 16:10:37,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 16:10:37,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 16:10:37,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 16:10:37,961 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 16:10:37,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 16:10:37,961 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 16:10:37,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 16:10:37,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 16:10:37,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 16:10:37,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 16:10:37,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:10:37,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 16:10:37,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 16:10:37,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 16:10:37,962 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 16:10:37,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 16:10:37,962 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 16:10:37,963 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 16:10:37,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 16:10:37,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 16:10:37,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb4cf2f7b619bb65636b8158cc0f6ae5cf90699f1f1c19bf802021a20c422d2c [2021-12-21 16:10:38,165 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 16:10:38,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 16:10:38,183 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 16:10:38,184 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 16:10:38,185 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 16:10:38,185 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-12-21 16:10:38,238 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ff4aba9f/2640fd06d3cd442db872b97774921311/FLAGfa754f61e [2021-12-21 16:10:38,792 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 16:10:38,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-12-21 16:10:38,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ff4aba9f/2640fd06d3cd442db872b97774921311/FLAGfa754f61e [2021-12-21 16:10:39,258 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ff4aba9f/2640fd06d3cd442db872b97774921311 [2021-12-21 16:10:39,260 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 16:10:39,261 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 16:10:39,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 16:10:39,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 16:10:39,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 16:10:39,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:10:39" (1/1) ... [2021-12-21 16:10:39,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@743eff37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:39, skipping insertion in model container [2021-12-21 16:10:39,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:10:39" (1/1) ... [2021-12-21 16:10:39,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 16:10:39,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 16:10:39,725 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2021-12-21 16:10:39,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:10:39,825 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 16:10:39,917 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2021-12-21 16:10:39,956 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:10:39,972 INFO L208 MainTranslator]: Completed translation [2021-12-21 16:10:39,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:39 WrapperNode [2021-12-21 16:10:39,973 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 16:10:39,973 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 16:10:39,974 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 16:10:39,974 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 16:10:39,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:39" (1/1) ... [2021-12-21 16:10:40,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:39" (1/1) ... [2021-12-21 16:10:40,048 INFO L137 Inliner]: procedures = 82, calls = 140, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 461 [2021-12-21 16:10:40,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 16:10:40,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 16:10:40,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 16:10:40,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 16:10:40,057 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:39" (1/1) ... [2021-12-21 16:10:40,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:39" (1/1) ... [2021-12-21 16:10:40,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:39" (1/1) ... [2021-12-21 16:10:40,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:39" (1/1) ... [2021-12-21 16:10:40,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:39" (1/1) ... [2021-12-21 16:10:40,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:39" (1/1) ... [2021-12-21 16:10:40,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:39" (1/1) ... [2021-12-21 16:10:40,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 16:10:40,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 16:10:40,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 16:10:40,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 16:10:40,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:39" (1/1) ... [2021-12-21 16:10:40,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:10:40,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:40,165 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 16:10:40,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 16:10:40,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 16:10:40,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-21 16:10:40,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 16:10:40,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 16:10:40,197 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-21 16:10:40,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-21 16:10:40,197 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-21 16:10:40,197 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-21 16:10:40,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 16:10:40,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 16:10:40,198 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-12-21 16:10:40,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-12-21 16:10:40,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-21 16:10:40,198 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-21 16:10:40,199 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 16:10:40,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 16:10:40,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 16:10:40,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 16:10:40,199 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-12-21 16:10:40,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-12-21 16:10:40,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 16:10:40,199 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-21 16:10:40,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-21 16:10:40,200 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-12-21 16:10:40,200 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-12-21 16:10:40,200 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 16:10:40,200 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 16:10:40,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 16:10:40,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 16:10:40,200 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~X~$Pointer$~X~int~TO~VOID [2021-12-21 16:10:40,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~X~$Pointer$~X~int~TO~VOID [2021-12-21 16:10:40,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-21 16:10:40,201 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-21 16:10:40,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-21 16:10:40,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 16:10:40,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 16:10:40,452 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 16:10:40,454 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 16:10:40,522 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-21 16:10:40,870 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 16:10:40,875 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 16:10:40,875 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 16:10:40,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:10:40 BoogieIcfgContainer [2021-12-21 16:10:40,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 16:10:40,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 16:10:40,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 16:10:40,880 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 16:10:40,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:10:39" (1/3) ... [2021-12-21 16:10:40,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469430b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:10:40, skipping insertion in model container [2021-12-21 16:10:40,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:10:39" (2/3) ... [2021-12-21 16:10:40,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469430b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:10:40, skipping insertion in model container [2021-12-21 16:10:40,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:10:40" (3/3) ... [2021-12-21 16:10:40,883 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-12-21 16:10:40,886 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 16:10:40,886 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 16:10:40,944 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 16:10:40,950 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 16:10:40,950 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 16:10:40,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 164 states, 131 states have (on average 1.4198473282442747) internal successors, (186), 136 states have internal predecessors, (186), 22 states have call successors, (22), 10 states have call predecessors, (22), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-21 16:10:40,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 16:10:40,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:40,975 INFO L514 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] [2021-12-21 16:10:40,976 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:40,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:40,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1048731652, now seen corresponding path program 1 times [2021-12-21 16:10:40,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:40,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474208752] [2021-12-21 16:10:40,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:40,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:41,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:10:41,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:41,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474208752] [2021-12-21 16:10:41,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474208752] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:41,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:41,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:10:41,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165988170] [2021-12-21 16:10:41,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:41,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:10:41,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:41,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:10:41,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:10:41,281 INFO L87 Difference]: Start difference. First operand has 164 states, 131 states have (on average 1.4198473282442747) internal successors, (186), 136 states have internal predecessors, (186), 22 states have call successors, (22), 10 states have call predecessors, (22), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:10:41,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:41,669 INFO L93 Difference]: Finished difference Result 500 states and 731 transitions. [2021-12-21 16:10:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:10:41,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-12-21 16:10:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:41,679 INFO L225 Difference]: With dead ends: 500 [2021-12-21 16:10:41,679 INFO L226 Difference]: Without dead ends: 327 [2021-12-21 16:10:41,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:10:41,684 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 275 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:41,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 509 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 16:10:41,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-21 16:10:41,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 279. [2021-12-21 16:10:41,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 228 states have (on average 1.3421052631578947) internal successors, (306), 228 states have internal predecessors, (306), 34 states have call successors, (34), 17 states have call predecessors, (34), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-21 16:10:41,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 373 transitions. [2021-12-21 16:10:41,729 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 373 transitions. Word has length 25 [2021-12-21 16:10:41,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:41,729 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 373 transitions. [2021-12-21 16:10:41,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:10:41,730 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 373 transitions. [2021-12-21 16:10:41,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-21 16:10:41,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:41,731 INFO L514 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] [2021-12-21 16:10:41,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 16:10:41,732 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:41,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:41,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1324273599, now seen corresponding path program 1 times [2021-12-21 16:10:41,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:41,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295773153] [2021-12-21 16:10:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:41,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:41,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:10:41,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:41,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295773153] [2021-12-21 16:10:41,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295773153] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:41,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:41,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:10:41,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808811850] [2021-12-21 16:10:41,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:41,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:10:41,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:41,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:10:41,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:10:41,829 INFO L87 Difference]: Start difference. First operand 279 states and 373 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:10:41,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:41,994 INFO L93 Difference]: Finished difference Result 602 states and 813 transitions. [2021-12-21 16:10:41,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 16:10:41,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-21 16:10:41,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:42,001 INFO L225 Difference]: With dead ends: 602 [2021-12-21 16:10:42,001 INFO L226 Difference]: Without dead ends: 331 [2021-12-21 16:10:42,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:10:42,006 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 49 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:42,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 471 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 16:10:42,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-12-21 16:10:42,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 280. [2021-12-21 16:10:42,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 229 states have (on average 1.3406113537117903) internal successors, (307), 229 states have internal predecessors, (307), 34 states have call successors, (34), 17 states have call predecessors, (34), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-21 16:10:42,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 374 transitions. [2021-12-21 16:10:42,037 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 374 transitions. Word has length 30 [2021-12-21 16:10:42,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:42,038 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 374 transitions. [2021-12-21 16:10:42,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:10:42,038 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 374 transitions. [2021-12-21 16:10:42,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-21 16:10:42,042 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:42,042 INFO L514 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] [2021-12-21 16:10:42,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 16:10:42,043 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:42,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:42,044 INFO L85 PathProgramCache]: Analyzing trace with hash -115857752, now seen corresponding path program 1 times [2021-12-21 16:10:42,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:42,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014014061] [2021-12-21 16:10:42,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:42,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:42,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:10:42,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:42,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014014061] [2021-12-21 16:10:42,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014014061] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:42,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702972697] [2021-12-21 16:10:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:42,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:42,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:42,144 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:10:42,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 16:10:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:42,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 16:10:42,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:10:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:10:42,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:10:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 16:10:42,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702972697] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:10:42,480 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 16:10:42,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-12-21 16:10:42,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884106383] [2021-12-21 16:10:42,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 16:10:42,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:10:42,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:42,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:10:42,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:10:42,483 INFO L87 Difference]: Start difference. First operand 280 states and 374 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:10:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:42,673 INFO L93 Difference]: Finished difference Result 612 states and 827 transitions. [2021-12-21 16:10:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:10:42,674 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-12-21 16:10:42,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:42,675 INFO L225 Difference]: With dead ends: 612 [2021-12-21 16:10:42,676 INFO L226 Difference]: Without dead ends: 340 [2021-12-21 16:10:42,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:10:42,677 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 63 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:42,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 801 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 16:10:42,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-12-21 16:10:42,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 292. [2021-12-21 16:10:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 241 states have (on average 1.3360995850622406) internal successors, (322), 241 states have internal predecessors, (322), 34 states have call successors, (34), 17 states have call predecessors, (34), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-21 16:10:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 389 transitions. [2021-12-21 16:10:42,698 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 389 transitions. Word has length 34 [2021-12-21 16:10:42,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:42,699 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 389 transitions. [2021-12-21 16:10:42,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:10:42,699 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 389 transitions. [2021-12-21 16:10:42,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-21 16:10:42,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:42,702 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:42,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 16:10:42,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:42,912 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:42,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:42,912 INFO L85 PathProgramCache]: Analyzing trace with hash -124336931, now seen corresponding path program 2 times [2021-12-21 16:10:42,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:42,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460326937] [2021-12-21 16:10:42,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:42,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:42,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:42,984 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-21 16:10:42,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:42,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460326937] [2021-12-21 16:10:42,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460326937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:42,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:42,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:10:42,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350001463] [2021-12-21 16:10:42,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:42,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:10:42,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:42,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:10:42,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:10:42,986 INFO L87 Difference]: Start difference. First operand 292 states and 389 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:10:43,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:43,219 INFO L93 Difference]: Finished difference Result 623 states and 837 transitions. [2021-12-21 16:10:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:10:43,220 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-12-21 16:10:43,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:43,222 INFO L225 Difference]: With dead ends: 623 [2021-12-21 16:10:43,222 INFO L226 Difference]: Without dead ends: 339 [2021-12-21 16:10:43,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:10:43,223 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 356 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:43,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 627 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 16:10:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-21 16:10:43,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 291. [2021-12-21 16:10:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 240 states have (on average 1.325) internal successors, (318), 240 states have internal predecessors, (318), 34 states have call successors, (34), 17 states have call predecessors, (34), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-21 16:10:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 385 transitions. [2021-12-21 16:10:43,234 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 385 transitions. Word has length 46 [2021-12-21 16:10:43,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:43,235 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 385 transitions. [2021-12-21 16:10:43,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 16:10:43,235 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 385 transitions. [2021-12-21 16:10:43,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 16:10:43,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:43,236 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 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] [2021-12-21 16:10:43,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 16:10:43,237 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:43,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1440028180, now seen corresponding path program 1 times [2021-12-21 16:10:43,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:43,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854374455] [2021-12-21 16:10:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:43,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:43,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:43,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 16:10:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:43,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:10:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-21 16:10:43,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:43,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854374455] [2021-12-21 16:10:43,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854374455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:43,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:43,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 16:10:43,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999705256] [2021-12-21 16:10:43,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:43,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:10:43,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:43,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:10:43,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:10:43,370 INFO L87 Difference]: Start difference. First operand 291 states and 385 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 16:10:43,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:43,653 INFO L93 Difference]: Finished difference Result 946 states and 1278 transitions. [2021-12-21 16:10:43,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:10:43,654 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-21 16:10:43,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:43,657 INFO L225 Difference]: With dead ends: 946 [2021-12-21 16:10:43,657 INFO L226 Difference]: Without dead ends: 658 [2021-12-21 16:10:43,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:10:43,659 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 262 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:43,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 879 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 16:10:43,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-12-21 16:10:43,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 582. [2021-12-21 16:10:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 479 states have (on average 1.3298538622129437) internal successors, (637), 481 states have internal predecessors, (637), 66 states have call successors, (66), 33 states have call predecessors, (66), 36 states have return successors, (75), 67 states have call predecessors, (75), 65 states have call successors, (75) [2021-12-21 16:10:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 778 transitions. [2021-12-21 16:10:43,678 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 778 transitions. Word has length 67 [2021-12-21 16:10:43,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:43,678 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 778 transitions. [2021-12-21 16:10:43,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 16:10:43,678 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 778 transitions. [2021-12-21 16:10:43,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-21 16:10:43,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:43,680 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-12-21 16:10:43,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 16:10:43,681 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:43,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:43,681 INFO L85 PathProgramCache]: Analyzing trace with hash 338916268, now seen corresponding path program 1 times [2021-12-21 16:10:43,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:43,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383650183] [2021-12-21 16:10:43,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:43,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:43,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:43,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:43,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-21 16:10:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:43,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-21 16:10:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:43,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:43,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-21 16:10:43,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:43,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-21 16:10:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-21 16:10:43,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:43,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383650183] [2021-12-21 16:10:43,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383650183] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:43,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:43,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:10:43,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888789313] [2021-12-21 16:10:43,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:43,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:10:43,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:43,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:10:43,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:10:43,762 INFO L87 Difference]: Start difference. First operand 582 states and 778 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 16:10:43,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:43,986 INFO L93 Difference]: Finished difference Result 1034 states and 1386 transitions. [2021-12-21 16:10:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 16:10:43,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 104 [2021-12-21 16:10:43,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:43,988 INFO L225 Difference]: With dead ends: 1034 [2021-12-21 16:10:43,988 INFO L226 Difference]: Without dead ends: 460 [2021-12-21 16:10:43,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:10:43,990 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 104 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:43,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 560 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 16:10:43,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-21 16:10:44,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 378. [2021-12-21 16:10:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 319 states have (on average 1.3322884012539185) internal successors, (425), 321 states have internal predecessors, (425), 37 states have call successors, (37), 19 states have call predecessors, (37), 21 states have return successors, (43), 37 states have call predecessors, (43), 36 states have call successors, (43) [2021-12-21 16:10:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 505 transitions. [2021-12-21 16:10:44,002 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 505 transitions. Word has length 104 [2021-12-21 16:10:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:44,003 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 505 transitions. [2021-12-21 16:10:44,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-21 16:10:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 505 transitions. [2021-12-21 16:10:44,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-21 16:10:44,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:44,004 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 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] [2021-12-21 16:10:44,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 16:10:44,005 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:44,005 INFO L85 PathProgramCache]: Analyzing trace with hash 335119820, now seen corresponding path program 2 times [2021-12-21 16:10:44,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:44,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055284170] [2021-12-21 16:10:44,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:44,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:44,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:44,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 16:10:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:44,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:10:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:44,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 16:10:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:44,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 16:10:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:44,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:44,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-21 16:10:44,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:44,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055284170] [2021-12-21 16:10:44,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055284170] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:44,165 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:44,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:10:44,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147757147] [2021-12-21 16:10:44,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:44,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:10:44,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:44,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:10:44,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:10:44,167 INFO L87 Difference]: Start difference. First operand 378 states and 505 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 16:10:44,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:44,428 INFO L93 Difference]: Finished difference Result 748 states and 1012 transitions. [2021-12-21 16:10:44,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 16:10:44,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 104 [2021-12-21 16:10:44,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:44,431 INFO L225 Difference]: With dead ends: 748 [2021-12-21 16:10:44,431 INFO L226 Difference]: Without dead ends: 402 [2021-12-21 16:10:44,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-21 16:10:44,432 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 72 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:44,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 791 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 16:10:44,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-21 16:10:44,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 376. [2021-12-21 16:10:44,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 316 states have (on average 1.3227848101265822) internal successors, (418), 318 states have internal predecessors, (418), 37 states have call successors, (37), 19 states have call predecessors, (37), 22 states have return successors, (46), 38 states have call predecessors, (46), 36 states have call successors, (46) [2021-12-21 16:10:44,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 501 transitions. [2021-12-21 16:10:44,447 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 501 transitions. Word has length 104 [2021-12-21 16:10:44,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:44,448 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 501 transitions. [2021-12-21 16:10:44,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-21 16:10:44,448 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 501 transitions. [2021-12-21 16:10:44,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 16:10:44,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:44,453 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:44,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 16:10:44,453 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:44,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:44,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1793628438, now seen corresponding path program 1 times [2021-12-21 16:10:44,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:44,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105923796] [2021-12-21 16:10:44,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:44,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:44,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:44,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:44,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 16:10:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:44,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:10:44,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:44,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 16:10:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:44,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 16:10:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:44,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:44,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:10:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:44,679 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-21 16:10:44,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:44,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105923796] [2021-12-21 16:10:44,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105923796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:44,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:44,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 16:10:44,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898905543] [2021-12-21 16:10:44,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:44,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 16:10:44,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:44,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 16:10:44,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-21 16:10:44,681 INFO L87 Difference]: Start difference. First operand 376 states and 501 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 16:10:45,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:45,158 INFO L93 Difference]: Finished difference Result 970 states and 1346 transitions. [2021-12-21 16:10:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 16:10:45,159 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2021-12-21 16:10:45,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:45,161 INFO L225 Difference]: With dead ends: 970 [2021-12-21 16:10:45,161 INFO L226 Difference]: Without dead ends: 626 [2021-12-21 16:10:45,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-21 16:10:45,163 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 150 mSDsluCounter, 2550 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 2866 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:45,163 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 2866 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 16:10:45,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-12-21 16:10:45,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 382. [2021-12-21 16:10:45,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 321 states have (on average 1.3115264797507789) internal successors, (421), 322 states have internal predecessors, (421), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (47), 40 states have call predecessors, (47), 36 states have call successors, (47) [2021-12-21 16:10:45,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 505 transitions. [2021-12-21 16:10:45,176 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 505 transitions. Word has length 111 [2021-12-21 16:10:45,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:45,176 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 505 transitions. [2021-12-21 16:10:45,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 16:10:45,177 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 505 transitions. [2021-12-21 16:10:45,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-21 16:10:45,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:45,178 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:45,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 16:10:45,178 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:45,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1834540397, now seen corresponding path program 1 times [2021-12-21 16:10:45,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:45,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164799594] [2021-12-21 16:10:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:45,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:45,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:45,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 16:10:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:45,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:10:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:45,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-21 16:10:45,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:45,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 16:10:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:45,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:45,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:10:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:45,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 16:10:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 16:10:45,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:45,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164799594] [2021-12-21 16:10:45,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164799594] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:45,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533561002] [2021-12-21 16:10:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:45,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:45,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:45,295 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:10:45,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 16:10:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:45,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 16:10:45,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:10:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-21 16:10:45,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:10:45,905 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 16:10:45,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533561002] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:10:45,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 16:10:45,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 16 [2021-12-21 16:10:45,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150442066] [2021-12-21 16:10:45,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 16:10:45,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 16:10:45,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:45,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 16:10:45,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-12-21 16:10:45,908 INFO L87 Difference]: Start difference. First operand 382 states and 505 transitions. Second operand has 16 states, 16 states have (on average 8.6875) internal successors, (139), 13 states have internal predecessors, (139), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-21 16:10:46,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:46,185 INFO L93 Difference]: Finished difference Result 800 states and 1076 transitions. [2021-12-21 16:10:46,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 16:10:46,186 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 13 states have internal predecessors, (139), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 117 [2021-12-21 16:10:46,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:46,188 INFO L225 Difference]: With dead ends: 800 [2021-12-21 16:10:46,188 INFO L226 Difference]: Without dead ends: 450 [2021-12-21 16:10:46,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-12-21 16:10:46,189 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 117 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:46,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 734 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 16:10:46,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-12-21 16:10:46,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 430. [2021-12-21 16:10:46,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 369 states have (on average 1.3035230352303524) internal successors, (481), 370 states have internal predecessors, (481), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (47), 40 states have call predecessors, (47), 36 states have call successors, (47) [2021-12-21 16:10:46,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 565 transitions. [2021-12-21 16:10:46,204 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 565 transitions. Word has length 117 [2021-12-21 16:10:46,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:46,204 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 565 transitions. [2021-12-21 16:10:46,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 13 states have internal predecessors, (139), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-21 16:10:46,204 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 565 transitions. [2021-12-21 16:10:46,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-21 16:10:46,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:46,206 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:46,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-21 16:10:46,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-21 16:10:46,416 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:46,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:46,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1065505129, now seen corresponding path program 2 times [2021-12-21 16:10:46,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:46,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217990027] [2021-12-21 16:10:46,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:46,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:46,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:46,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 16:10:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:46,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 16:10:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:46,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 16:10:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:46,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 16:10:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:46,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:46,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:10:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:46,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-21 16:10:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:46,600 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-21 16:10:46,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:46,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217990027] [2021-12-21 16:10:46,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217990027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:46,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426731941] [2021-12-21 16:10:46,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 16:10:46,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:46,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:46,602 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:10:46,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 16:10:46,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 16:10:46,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 16:10:46,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-21 16:10:46,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:10:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-21 16:10:47,263 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:10:47,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426731941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:47,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:10:47,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 29 [2021-12-21 16:10:47,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893890837] [2021-12-21 16:10:47,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:47,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 16:10:47,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:47,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 16:10:47,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-12-21 16:10:47,265 INFO L87 Difference]: Start difference. First operand 430 states and 565 transitions. Second operand has 15 states, 14 states have (on average 5.714285714285714) internal successors, (80), 12 states have internal predecessors, (80), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 16:10:47,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:47,564 INFO L93 Difference]: Finished difference Result 1098 states and 1476 transitions. [2021-12-21 16:10:47,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 16:10:47,565 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.714285714285714) internal successors, (80), 12 states have internal predecessors, (80), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 141 [2021-12-21 16:10:47,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:47,568 INFO L225 Difference]: With dead ends: 1098 [2021-12-21 16:10:47,568 INFO L226 Difference]: Without dead ends: 700 [2021-12-21 16:10:47,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 16:10:47,569 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 297 mSDsluCounter, 3516 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 3839 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:47,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 3839 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 16:10:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-12-21 16:10:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 440. [2021-12-21 16:10:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 377 states have (on average 1.297082228116711) internal successors, (489), 378 states have internal predecessors, (489), 39 states have call successors, (39), 19 states have call predecessors, (39), 23 states have return successors, (49), 42 states have call predecessors, (49), 38 states have call successors, (49) [2021-12-21 16:10:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 577 transitions. [2021-12-21 16:10:47,589 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 577 transitions. Word has length 141 [2021-12-21 16:10:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:47,589 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 577 transitions. [2021-12-21 16:10:47,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.714285714285714) internal successors, (80), 12 states have internal predecessors, (80), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-21 16:10:47,590 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 577 transitions. [2021-12-21 16:10:47,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-21 16:10:47,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:47,591 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:47,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 16:10:47,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:47,795 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:47,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:47,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1149357710, now seen corresponding path program 1 times [2021-12-21 16:10:47,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:47,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958556502] [2021-12-21 16:10:47,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:47,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:47,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:47,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 16:10:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:47,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 16:10:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:47,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 16:10:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:47,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 16:10:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:47,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:47,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-21 16:10:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:47,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-21 16:10:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:47,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-21 16:10:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:47,938 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-12-21 16:10:47,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:47,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958556502] [2021-12-21 16:10:47,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958556502] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:47,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:47,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 16:10:47,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085422537] [2021-12-21 16:10:47,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:47,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:10:47,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:10:47,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:10:47,940 INFO L87 Difference]: Start difference. First operand 440 states and 577 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-21 16:10:48,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:48,146 INFO L93 Difference]: Finished difference Result 673 states and 894 transitions. [2021-12-21 16:10:48,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:10:48,147 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 154 [2021-12-21 16:10:48,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:48,148 INFO L225 Difference]: With dead ends: 673 [2021-12-21 16:10:48,148 INFO L226 Difference]: Without dead ends: 462 [2021-12-21 16:10:48,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-21 16:10:48,150 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 167 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:48,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 583 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 16:10:48,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-21 16:10:48,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 442. [2021-12-21 16:10:48,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 379 states have (on average 1.2955145118733509) internal successors, (491), 380 states have internal predecessors, (491), 39 states have call successors, (39), 19 states have call predecessors, (39), 23 states have return successors, (49), 42 states have call predecessors, (49), 38 states have call successors, (49) [2021-12-21 16:10:48,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 579 transitions. [2021-12-21 16:10:48,168 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 579 transitions. Word has length 154 [2021-12-21 16:10:48,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:48,168 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 579 transitions. [2021-12-21 16:10:48,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-21 16:10:48,169 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 579 transitions. [2021-12-21 16:10:48,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-21 16:10:48,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:48,170 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:48,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 16:10:48,170 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:48,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:48,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1983743405, now seen corresponding path program 1 times [2021-12-21 16:10:48,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:48,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556411098] [2021-12-21 16:10:48,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:48,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:48,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:48,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:48,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 16:10:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:48,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 16:10:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:48,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 16:10:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:48,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 16:10:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:48,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:48,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-21 16:10:48,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:48,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-21 16:10:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:48,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-21 16:10:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-12-21 16:10:48,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:48,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556411098] [2021-12-21 16:10:48,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556411098] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:48,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:10:48,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 16:10:48,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544397264] [2021-12-21 16:10:48,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:48,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 16:10:48,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:48,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 16:10:48,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-21 16:10:48,358 INFO L87 Difference]: Start difference. First operand 442 states and 579 transitions. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 16:10:48,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:48,845 INFO L93 Difference]: Finished difference Result 880 states and 1161 transitions. [2021-12-21 16:10:48,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 16:10:48,845 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-12-21 16:10:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:48,847 INFO L225 Difference]: With dead ends: 880 [2021-12-21 16:10:48,847 INFO L226 Difference]: Without dead ends: 470 [2021-12-21 16:10:48,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-12-21 16:10:48,848 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 513 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:48,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 825 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 16:10:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-12-21 16:10:48,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 440. [2021-12-21 16:10:48,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 377 states have (on average 1.2891246684350133) internal successors, (486), 378 states have internal predecessors, (486), 39 states have call successors, (39), 19 states have call predecessors, (39), 23 states have return successors, (48), 42 states have call predecessors, (48), 38 states have call successors, (48) [2021-12-21 16:10:48,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 573 transitions. [2021-12-21 16:10:48,866 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 573 transitions. Word has length 156 [2021-12-21 16:10:48,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:48,867 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 573 transitions. [2021-12-21 16:10:48,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 16:10:48,867 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 573 transitions. [2021-12-21 16:10:48,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-21 16:10:48,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:48,868 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:48,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 16:10:48,869 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:48,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:48,869 INFO L85 PathProgramCache]: Analyzing trace with hash -2106669318, now seen corresponding path program 1 times [2021-12-21 16:10:48,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:48,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322899393] [2021-12-21 16:10:48,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:48,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:48,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:48,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:48,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-21 16:10:49,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:49,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 16:10:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:49,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-21 16:10:49,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:49,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-21 16:10:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:49,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:49,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:10:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:49,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-21 16:10:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:49,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-21 16:10:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:49,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-21 16:10:49,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:49,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-21 16:10:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 16:10:49,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:49,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322899393] [2021-12-21 16:10:49,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322899393] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:49,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937550549] [2021-12-21 16:10:49,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:49,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:49,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:49,100 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:10:49,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 16:10:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:49,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 16:10:49,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:10:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 19 proven. 190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 16:10:49,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:10:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 16:10:49,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937550549] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:10:49,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 16:10:49,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 30 [2021-12-21 16:10:49,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560858307] [2021-12-21 16:10:49,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 16:10:49,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-21 16:10:49,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:49,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-21 16:10:49,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2021-12-21 16:10:49,962 INFO L87 Difference]: Start difference. First operand 440 states and 573 transitions. Second operand has 30 states, 30 states have (on average 7.2) internal successors, (216), 25 states have internal predecessors, (216), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-21 16:10:50,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:50,402 INFO L93 Difference]: Finished difference Result 966 states and 1287 transitions. [2021-12-21 16:10:50,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-21 16:10:50,402 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 7.2) internal successors, (216), 25 states have internal predecessors, (216), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 168 [2021-12-21 16:10:50,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:50,404 INFO L225 Difference]: With dead ends: 966 [2021-12-21 16:10:50,405 INFO L226 Difference]: Without dead ends: 558 [2021-12-21 16:10:50,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=322, Invalid=608, Unknown=0, NotChecked=0, Total=930 [2021-12-21 16:10:50,407 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 178 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1418 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:50,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 1418 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 16:10:50,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-12-21 16:10:50,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 536. [2021-12-21 16:10:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 473 states have (on average 1.2811839323467231) internal successors, (606), 474 states have internal predecessors, (606), 39 states have call successors, (39), 19 states have call predecessors, (39), 23 states have return successors, (48), 42 states have call predecessors, (48), 38 states have call successors, (48) [2021-12-21 16:10:50,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 693 transitions. [2021-12-21 16:10:50,431 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 693 transitions. Word has length 168 [2021-12-21 16:10:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:50,432 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 693 transitions. [2021-12-21 16:10:50,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.2) internal successors, (216), 25 states have internal predecessors, (216), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-21 16:10:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 693 transitions. [2021-12-21 16:10:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-21 16:10:50,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:50,434 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:50,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 16:10:50,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:50,647 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:50,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:50,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1303518258, now seen corresponding path program 2 times [2021-12-21 16:10:50,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:50,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901187643] [2021-12-21 16:10:50,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:50,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:51,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:51,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-21 16:10:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:51,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-21 16:10:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:51,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-21 16:10:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:51,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-21 16:10:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:51,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:51,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:10:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:51,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 16:10:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:51,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 16:10:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:51,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-21 16:10:51,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:51,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-21 16:10:51,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:51,150 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 16:10:51,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:51,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901187643] [2021-12-21 16:10:51,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901187643] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:51,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895275727] [2021-12-21 16:10:51,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 16:10:51,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:51,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:51,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:10:51,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 16:10:51,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 16:10:51,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 16:10:51,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 16:10:51,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:10:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2021-12-21 16:10:51,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:10:51,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895275727] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:51,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:10:51,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [30] total 31 [2021-12-21 16:10:51,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572153237] [2021-12-21 16:10:51,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:51,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 16:10:51,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:51,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 16:10:51,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2021-12-21 16:10:51,610 INFO L87 Difference]: Start difference. First operand 536 states and 693 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 16:10:51,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:51,646 INFO L93 Difference]: Finished difference Result 1346 states and 1766 transitions. [2021-12-21 16:10:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 16:10:51,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 216 [2021-12-21 16:10:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:51,650 INFO L225 Difference]: With dead ends: 1346 [2021-12-21 16:10:51,650 INFO L226 Difference]: Without dead ends: 842 [2021-12-21 16:10:51,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2021-12-21 16:10:51,651 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 83 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:51,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 472 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:10:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-12-21 16:10:51,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 532. [2021-12-21 16:10:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 471 states have (on average 1.2781316348195328) internal successors, (602), 472 states have internal predecessors, (602), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2021-12-21 16:10:51,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 685 transitions. [2021-12-21 16:10:51,676 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 685 transitions. Word has length 216 [2021-12-21 16:10:51,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:51,676 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 685 transitions. [2021-12-21 16:10:51,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-21 16:10:51,677 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 685 transitions. [2021-12-21 16:10:51,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-21 16:10:51,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:51,679 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:51,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 16:10:51,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 16:10:51,892 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:51,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:51,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1768078862, now seen corresponding path program 1 times [2021-12-21 16:10:51,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:51,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977604967] [2021-12-21 16:10:51,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:51,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:52,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:52,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-21 16:10:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:52,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-21 16:10:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:52,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-21 16:10:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:52,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-21 16:10:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:52,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:52,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:10:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:52,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-21 16:10:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:52,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-21 16:10:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:52,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-21 16:10:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:52,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-21 16:10:52,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 16:10:52,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:52,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977604967] [2021-12-21 16:10:52,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977604967] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:52,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253814640] [2021-12-21 16:10:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:52,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:52,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:52,368 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:10:52,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 16:10:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:52,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 1352 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 16:10:52,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:10:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 19 proven. 946 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-21 16:10:53,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:10:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 16:10:53,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253814640] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:10:53,899 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 16:10:53,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 25] total 54 [2021-12-21 16:10:53,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435734186] [2021-12-21 16:10:53,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 16:10:53,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-21 16:10:53,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:53,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-21 16:10:53,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1192, Invalid=1670, Unknown=0, NotChecked=0, Total=2862 [2021-12-21 16:10:53,902 INFO L87 Difference]: Start difference. First operand 532 states and 685 transitions. Second operand has 54 states, 54 states have (on average 5.777777777777778) internal successors, (312), 49 states have internal predecessors, (312), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-21 16:10:54,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:54,387 INFO L93 Difference]: Finished difference Result 1246 states and 1653 transitions. [2021-12-21 16:10:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-21 16:10:54,388 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.777777777777778) internal successors, (312), 49 states have internal predecessors, (312), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 216 [2021-12-21 16:10:54,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:54,391 INFO L225 Difference]: With dead ends: 1246 [2021-12-21 16:10:54,391 INFO L226 Difference]: Without dead ends: 746 [2021-12-21 16:10:54,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1198, Invalid=1772, Unknown=0, NotChecked=0, Total=2970 [2021-12-21 16:10:54,395 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 512 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:54,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 1012 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 16:10:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-12-21 16:10:54,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 724. [2021-12-21 16:10:54,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 663 states have (on average 1.2699849170437405) internal successors, (842), 664 states have internal predecessors, (842), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2021-12-21 16:10:54,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 925 transitions. [2021-12-21 16:10:54,429 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 925 transitions. Word has length 216 [2021-12-21 16:10:54,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:54,430 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 925 transitions. [2021-12-21 16:10:54,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.777777777777778) internal successors, (312), 49 states have internal predecessors, (312), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-21 16:10:54,430 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 925 transitions. [2021-12-21 16:10:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-12-21 16:10:54,433 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:54,433 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:54,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 16:10:54,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 16:10:54,639 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:54,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1934856118, now seen corresponding path program 2 times [2021-12-21 16:10:54,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:54,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162900557] [2021-12-21 16:10:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:54,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:55,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:55,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-12-21 16:10:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:55,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-12-21 16:10:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:55,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2021-12-21 16:10:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:55,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2021-12-21 16:10:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:55,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:55,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:10:55,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:55,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2021-12-21 16:10:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:55,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2021-12-21 16:10:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:55,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2021-12-21 16:10:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:55,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2021-12-21 16:10:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 16:10:55,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:55,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162900557] [2021-12-21 16:10:55,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162900557] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:55,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968385984] [2021-12-21 16:10:55,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 16:10:55,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:55,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:55,816 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:10:55,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 16:10:56,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 16:10:56,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 16:10:56,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 16:10:56,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:10:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4216 trivial. 0 not checked. [2021-12-21 16:10:56,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:10:56,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968385984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:10:56,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:10:56,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [54] total 57 [2021-12-21 16:10:56,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737707339] [2021-12-21 16:10:56,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:10:56,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:10:56,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:10:56,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:10:56,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=1994, Unknown=0, NotChecked=0, Total=3192 [2021-12-21 16:10:56,467 INFO L87 Difference]: Start difference. First operand 724 states and 925 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-21 16:10:56,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:10:56,591 INFO L93 Difference]: Finished difference Result 1924 states and 2484 transitions. [2021-12-21 16:10:56,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:10:56,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 312 [2021-12-21 16:10:56,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:10:56,596 INFO L225 Difference]: With dead ends: 1924 [2021-12-21 16:10:56,596 INFO L226 Difference]: Without dead ends: 1228 [2021-12-21 16:10:56,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1202, Invalid=2104, Unknown=0, NotChecked=0, Total=3306 [2021-12-21 16:10:56,598 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 84 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:10:56,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1020 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:10:56,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-12-21 16:10:56,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 726. [2021-12-21 16:10:56,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 665 states have (on average 1.2691729323308272) internal successors, (844), 666 states have internal predecessors, (844), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2021-12-21 16:10:56,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 927 transitions. [2021-12-21 16:10:56,639 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 927 transitions. Word has length 312 [2021-12-21 16:10:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:10:56,639 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 927 transitions. [2021-12-21 16:10:56,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-21 16:10:56,640 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 927 transitions. [2021-12-21 16:10:56,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-12-21 16:10:56,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:10:56,642 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:10:56,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 16:10:56,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:56,855 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:10:56,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:10:56,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1480488866, now seen corresponding path program 1 times [2021-12-21 16:10:56,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:10:56,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998135676] [2021-12-21 16:10:56,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:56,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:10:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:57,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:10:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:57,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-12-21 16:10:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:57,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-12-21 16:10:57,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:57,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2021-12-21 16:10:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:57,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2021-12-21 16:10:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:57,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:10:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:57,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:10:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:57,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2021-12-21 16:10:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:57,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2021-12-21 16:10:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:57,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2021-12-21 16:10:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:57,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 289 [2021-12-21 16:10:57,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 16:10:57,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:10:57,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998135676] [2021-12-21 16:10:57,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998135676] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:10:57,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035641522] [2021-12-21 16:10:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:10:57,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:10:57,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:10:57,939 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:10:57,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 16:10:58,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:10:58,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-21 16:10:58,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:10:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 19 proven. 4186 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-21 16:10:58,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:11:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 16:11:01,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035641522] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:11:01,234 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 16:11:01,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 49, 49] total 102 [2021-12-21 16:11:01,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558605081] [2021-12-21 16:11:01,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 16:11:01,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-12-21 16:11:01,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:01,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-12-21 16:11:01,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4672, Invalid=5630, Unknown=0, NotChecked=0, Total=10302 [2021-12-21 16:11:01,239 INFO L87 Difference]: Start difference. First operand 726 states and 927 transitions. Second operand has 102 states, 102 states have (on average 4.96078431372549) internal successors, (506), 97 states have internal predecessors, (506), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-21 16:11:02,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:02,336 INFO L93 Difference]: Finished difference Result 1822 states and 2419 transitions. [2021-12-21 16:11:02,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-21 16:11:02,337 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 4.96078431372549) internal successors, (506), 97 states have internal predecessors, (506), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 313 [2021-12-21 16:11:02,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:02,340 INFO L225 Difference]: With dead ends: 1822 [2021-12-21 16:11:02,341 INFO L226 Difference]: Without dead ends: 1128 [2021-12-21 16:11:02,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 596 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4678, Invalid=5828, Unknown=0, NotChecked=0, Total=10506 [2021-12-21 16:11:02,344 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 968 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:02,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 1461 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 16:11:02,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-12-21 16:11:02,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1110. [2021-12-21 16:11:02,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1049 states have (on average 1.2621544327931362) internal successors, (1324), 1050 states have internal predecessors, (1324), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2021-12-21 16:11:02,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1407 transitions. [2021-12-21 16:11:02,399 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1407 transitions. Word has length 313 [2021-12-21 16:11:02,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:02,399 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 1407 transitions. [2021-12-21 16:11:02,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 4.96078431372549) internal successors, (506), 97 states have internal predecessors, (506), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-21 16:11:02,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1407 transitions. [2021-12-21 16:11:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-12-21 16:11:02,404 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:02,405 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:02,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 16:11:02,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 16:11:02,611 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:02,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:02,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1574301454, now seen corresponding path program 2 times [2021-12-21 16:11:02,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:02,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201078618] [2021-12-21 16:11:02,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:02,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:05,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:05,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2021-12-21 16:11:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:05,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2021-12-21 16:11:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:05,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 421 [2021-12-21 16:11:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:05,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2021-12-21 16:11:05,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:05,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:05,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:11:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:05,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2021-12-21 16:11:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:05,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 463 [2021-12-21 16:11:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:05,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 471 [2021-12-21 16:11:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:05,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 481 [2021-12-21 16:11:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17616 backedges. 7 proven. 17578 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 16:11:05,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:05,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201078618] [2021-12-21 16:11:05,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201078618] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:11:05,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660015307] [2021-12-21 16:11:05,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 16:11:05,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:11:05,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:11:05,920 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:11:05,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 16:11:06,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-21 16:11:06,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 16:11:06,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 16:11:06,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:11:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 17616 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17609 trivial. 0 not checked. [2021-12-21 16:11:07,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 16:11:07,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660015307] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:07,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 16:11:07,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [102] total 105 [2021-12-21 16:11:07,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883496485] [2021-12-21 16:11:07,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:07,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:11:07,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:07,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:11:07,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4678, Invalid=6242, Unknown=0, NotChecked=0, Total=10920 [2021-12-21 16:11:07,031 INFO L87 Difference]: Start difference. First operand 1110 states and 1407 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-21 16:11:07,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:07,204 INFO L93 Difference]: Finished difference Result 3078 states and 3928 transitions. [2021-12-21 16:11:07,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:11:07,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 505 [2021-12-21 16:11:07,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:07,210 INFO L225 Difference]: With dead ends: 3078 [2021-12-21 16:11:07,211 INFO L226 Difference]: Without dead ends: 1998 [2021-12-21 16:11:07,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4682, Invalid=6448, Unknown=0, NotChecked=0, Total=11130 [2021-12-21 16:11:07,215 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 83 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:07,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1020 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 16:11:07,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-12-21 16:11:07,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1112. [2021-12-21 16:11:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1051 states have (on average 1.2616555661274975) internal successors, (1326), 1052 states have internal predecessors, (1326), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2021-12-21 16:11:07,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1409 transitions. [2021-12-21 16:11:07,283 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1409 transitions. Word has length 505 [2021-12-21 16:11:07,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:07,284 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 1409 transitions. [2021-12-21 16:11:07,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-21 16:11:07,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1409 transitions. [2021-12-21 16:11:07,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-12-21 16:11:07,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:07,289 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:07,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 16:11:07,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 16:11:07,510 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:07,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:07,511 INFO L85 PathProgramCache]: Analyzing trace with hash -249914232, now seen corresponding path program 1 times [2021-12-21 16:11:07,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:07,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749931774] [2021-12-21 16:11:07,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:07,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:10,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:10,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2021-12-21 16:11:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:10,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2021-12-21 16:11:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:10,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 421 [2021-12-21 16:11:10,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:10,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2021-12-21 16:11:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:10,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:10,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:11:10,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:10,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2021-12-21 16:11:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:10,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 463 [2021-12-21 16:11:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:10,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 471 [2021-12-21 16:11:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:10,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2021-12-21 16:11:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17617 backedges. 7 proven. 17578 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-21 16:11:10,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:10,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749931774] [2021-12-21 16:11:10,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749931774] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:11:10,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745556587] [2021-12-21 16:11:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:10,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:11:10,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:11:10,727 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:11:10,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 16:11:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:11,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 2965 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-21 16:11:11,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:11:12,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17617 backedges. 19 proven. 17578 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-21 16:11:12,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:11:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17617 backedges. 7 proven. 17578 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-21 16:11:20,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745556587] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:11:20,529 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 16:11:20,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 97, 97] total 198 [2021-12-21 16:11:20,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5786581] [2021-12-21 16:11:20,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 16:11:20,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2021-12-21 16:11:20,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:20,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2021-12-21 16:11:20,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18544, Invalid=20462, Unknown=0, NotChecked=0, Total=39006 [2021-12-21 16:11:20,537 INFO L87 Difference]: Start difference. First operand 1112 states and 1409 transitions. Second operand has 198 states, 198 states have (on average 4.505050505050505) internal successors, (892), 193 states have internal predecessors, (892), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-21 16:11:25,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:25,565 INFO L93 Difference]: Finished difference Result 2974 states and 3953 transitions. [2021-12-21 16:11:25,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-12-21 16:11:25,565 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 198 states have (on average 4.505050505050505) internal successors, (892), 193 states have internal predecessors, (892), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 506 [2021-12-21 16:11:25,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:25,572 INFO L225 Difference]: With dead ends: 2974 [2021-12-21 16:11:25,572 INFO L226 Difference]: Without dead ends: 1894 [2021-12-21 16:11:25,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1131 GetRequests, 934 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=18550, Invalid=20852, Unknown=0, NotChecked=0, Total=39402 [2021-12-21 16:11:25,577 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 1839 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1840 SdHoareTripleChecker+Valid, 2017 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:25,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1840 Valid, 2017 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 16:11:25,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-12-21 16:11:25,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1880. [2021-12-21 16:11:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1819 states have (on average 1.2567344694887301) internal successors, (2286), 1820 states have internal predecessors, (2286), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2021-12-21 16:11:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 2369 transitions. [2021-12-21 16:11:25,682 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 2369 transitions. Word has length 506 [2021-12-21 16:11:25,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:25,682 INFO L470 AbstractCegarLoop]: Abstraction has 1880 states and 2369 transitions. [2021-12-21 16:11:25,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 198 states have (on average 4.505050505050505) internal successors, (892), 193 states have internal predecessors, (892), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-21 16:11:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 2369 transitions. [2021-12-21 16:11:25,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 891 [2021-12-21 16:11:25,689 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:25,689 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:25,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 16:11:25,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:11:25,895 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:25,896 INFO L85 PathProgramCache]: Analyzing trace with hash 164952872, now seen corresponding path program 2 times [2021-12-21 16:11:25,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:25,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97664874] [2021-12-21 16:11:25,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:25,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:26,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:36,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:36,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:36,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 784 [2021-12-21 16:11:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:36,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 790 [2021-12-21 16:11:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:36,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 805 [2021-12-21 16:11:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:37,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 812 [2021-12-21 16:11:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:37,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:37,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:11:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:37,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 836 [2021-12-21 16:11:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:37,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 847 [2021-12-21 16:11:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:37,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 855 [2021-12-21 16:11:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:37,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 866 [2021-12-21 16:11:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:37,302 INFO L134 CoverageAnalysis]: Checked inductivity of 72049 backedges. 7 proven. 72010 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-21 16:11:37,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:37,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97664874] [2021-12-21 16:11:37,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97664874] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:11:37,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518262396] [2021-12-21 16:11:37,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 16:11:37,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:11:37,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:11:37,304 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 16:11:37,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process