./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.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_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.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 0408b8dd1e50dba1d05ee8137dbd65dd8b8c61dcceb5e60c09fc08110798cce8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 16:11:48,925 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 16:11:48,927 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 16:11:48,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 16:11:48,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 16:11:48,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 16:11:48,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 16:11:48,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 16:11:48,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 16:11:48,991 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 16:11:48,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 16:11:48,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 16:11:48,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 16:11:48,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 16:11:48,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 16:11:48,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 16:11:48,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 16:11:49,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 16:11:49,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 16:11:49,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 16:11:49,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 16:11:49,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 16:11:49,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 16:11:49,009 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 16:11:49,013 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 16:11:49,015 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 16:11:49,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 16:11:49,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 16:11:49,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 16:11:49,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 16:11:49,017 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 16:11:49,018 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 16:11:49,019 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 16:11:49,019 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 16:11:49,020 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 16:11:49,021 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 16:11:49,021 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 16:11:49,022 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 16:11:49,022 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 16:11:49,023 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 16:11:49,024 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 16:11:49,025 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-21 16:11:49,047 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 16:11:49,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 16:11:49,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 16:11:49,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 16:11:49,050 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 16:11:49,051 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 16:11:49,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 16:11:49,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 16:11:49,051 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 16:11:49,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 16:11:49,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 16:11:49,052 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 16:11:49,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 16:11:49,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 16:11:49,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 16:11:49,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 16:11:49,053 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 16:11:49,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 16:11:49,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 16:11:49,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 16:11:49,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 16:11:49,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:11:49,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 16:11:49,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 16:11:49,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 16:11:49,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 16:11:49,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 16:11:49,055 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 16:11:49,055 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 16:11:49,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 16:11:49,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 16:11:49,055 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0408b8dd1e50dba1d05ee8137dbd65dd8b8c61dcceb5e60c09fc08110798cce8 [2021-12-21 16:11:49,226 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 16:11:49,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 16:11:49,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 16:11:49,242 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 16:11:49,243 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 16:11:49,244 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-12-21 16:11:49,302 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56986e13d/20c5e7f26b974e05910707efcf219246/FLAG470d5ff8a [2021-12-21 16:11:49,864 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 16:11:49,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-12-21 16:11:49,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56986e13d/20c5e7f26b974e05910707efcf219246/FLAG470d5ff8a [2021-12-21 16:11:50,279 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56986e13d/20c5e7f26b974e05910707efcf219246 [2021-12-21 16:11:50,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 16:11:50,286 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 16:11:50,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 16:11:50,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 16:11:50,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 16:11:50,291 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:11:50" (1/1) ... [2021-12-21 16:11:50,292 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5777b623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:50, skipping insertion in model container [2021-12-21 16:11:50,292 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 04:11:50" (1/1) ... [2021-12-21 16:11:50,297 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 16:11:50,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 16:11:50,786 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_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2021-12-21 16:11:50,979 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:11:50,993 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 16:11:51,084 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_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i[149470,149483] [2021-12-21 16:11:51,162 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 16:11:51,180 INFO L208 MainTranslator]: Completed translation [2021-12-21 16:11:51,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:51 WrapperNode [2021-12-21 16:11:51,182 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 16:11:51,182 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 16:11:51,182 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 16:11:51,183 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 16:11:51,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:51" (1/1) ... [2021-12-21 16:11:51,266 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:51" (1/1) ... [2021-12-21 16:11:51,339 INFO L137 Inliner]: procedures = 88, calls = 403, calls flagged for inlining = 27, calls inlined = 24, statements flattened = 1034 [2021-12-21 16:11:51,340 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 16:11:51,340 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 16:11:51,340 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 16:11:51,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 16:11:51,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:51" (1/1) ... [2021-12-21 16:11:51,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:51" (1/1) ... [2021-12-21 16:11:51,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:51" (1/1) ... [2021-12-21 16:11:51,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:51" (1/1) ... [2021-12-21 16:11:51,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:51" (1/1) ... [2021-12-21 16:11:51,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:51" (1/1) ... [2021-12-21 16:11:51,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:51" (1/1) ... [2021-12-21 16:11:51,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 16:11:51,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 16:11:51,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 16:11:51,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 16:11:51,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:51" (1/1) ... [2021-12-21 16:11:51,435 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 16:11:51,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:11:51,481 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 16:11:51,544 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 16:11:51,562 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free_int [2021-12-21 16:11:51,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free_int [2021-12-21 16:11:51,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 16:11:51,563 INFO L130 BoogieDeclarations]: Found specification of procedure load_pkt [2021-12-21 16:11:51,563 INFO L138 BoogieDeclarations]: Found implementation of procedure load_pkt [2021-12-21 16:11:51,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-21 16:11:51,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 16:11:51,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 16:11:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-21 16:11:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-21 16:11:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-21 16:11:51,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-21 16:11:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 16:11:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 16:11:51,564 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-12-21 16:11:51,564 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-12-21 16:11:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-21 16:11:51,565 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-21 16:11:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-21 16:11:51,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-21 16:11:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_skb_12 [2021-12-21 16:11:51,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_skb_12 [2021-12-21 16:11:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 16:11:51,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 16:11:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-12-21 16:11:51,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-12-21 16:11:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure type_trans [2021-12-21 16:11:51,566 INFO L138 BoogieDeclarations]: Found implementation of procedure type_trans [2021-12-21 16:11:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-12-21 16:11:51,566 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-12-21 16:11:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 16:11:51,566 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-21 16:11:51,567 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-21 16:11:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-12-21 16:11:51,567 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-12-21 16:11:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-21 16:11:51,567 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-21 16:11:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 16:11:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 16:11:51,567 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~X~$Pointer$~X~int~TO~VOID [2021-12-21 16:11:51,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~X~$Pointer$~X~int~TO~VOID [2021-12-21 16:11:51,568 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-21 16:11:51,568 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-21 16:11:51,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-21 16:11:51,569 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-12-21 16:11:51,569 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-12-21 16:11:51,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 16:11:51,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 16:11:51,866 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 16:11:51,867 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 16:11:52,126 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-21 16:11:52,631 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 16:11:52,638 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 16:11:52,638 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-21 16:11:52,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:11:52 BoogieIcfgContainer [2021-12-21 16:11:52,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 16:11:52,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 16:11:52,641 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 16:11:52,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 16:11:52,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 04:11:50" (1/3) ... [2021-12-21 16:11:52,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8e233e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:11:52, skipping insertion in model container [2021-12-21 16:11:52,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 04:11:51" (2/3) ... [2021-12-21 16:11:52,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f8e233e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 04:11:52, skipping insertion in model container [2021-12-21 16:11:52,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 04:11:52" (3/3) ... [2021-12-21 16:11:52,646 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--rfc1201.ko-entry_point.cil.out.i [2021-12-21 16:11:52,650 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 16:11:52,650 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 16:11:52,684 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 16:11:52,690 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 16:11:52,691 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 16:11:52,723 INFO L276 IsEmpty]: Start isEmpty. Operand has 305 states, 243 states have (on average 1.4444444444444444) internal successors, (351), 248 states have internal predecessors, (351), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-21 16:11:52,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-21 16:11:52,729 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:52,729 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 16:11:52,730 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:52,734 INFO L85 PathProgramCache]: Analyzing trace with hash 722424881, now seen corresponding path program 1 times [2021-12-21 16:11:52,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:52,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92819437] [2021-12-21 16:11:52,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:52,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:52,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:52,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:52,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:53,007 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 16:11:53,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:53,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92819437] [2021-12-21 16:11:53,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92819437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:53,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:53,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 16:11:53,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40808196] [2021-12-21 16:11:53,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:53,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:11:53,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:53,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:11:53,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 16:11:53,040 INFO L87 Difference]: Start difference. First operand has 305 states, 243 states have (on average 1.4444444444444444) internal successors, (351), 248 states have internal predecessors, (351), 45 states have call successors, (45), 16 states have call predecessors, (45), 15 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) 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 16:11:53,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:53,849 INFO L93 Difference]: Finished difference Result 947 states and 1418 transitions. [2021-12-21 16:11:53,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:11:53,851 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 16:11:53,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:53,870 INFO L225 Difference]: With dead ends: 947 [2021-12-21 16:11:53,870 INFO L226 Difference]: Without dead ends: 633 [2021-12-21 16:11:53,878 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 16:11:53,891 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 503 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1061 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:53,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 1061 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 16:11:53,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2021-12-21 16:11:53,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 565. [2021-12-21 16:11:53,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 456 states have (on average 1.4078947368421053) internal successors, (642), 456 states have internal predecessors, (642), 80 states have call successors, (80), 29 states have call predecessors, (80), 28 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2021-12-21 16:11:53,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 801 transitions. [2021-12-21 16:11:53,988 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 801 transitions. Word has length 25 [2021-12-21 16:11:53,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:53,988 INFO L470 AbstractCegarLoop]: Abstraction has 565 states and 801 transitions. [2021-12-21 16:11:53,988 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 16:11:53,989 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 801 transitions. [2021-12-21 16:11:53,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 16:11:53,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:53,993 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] [2021-12-21 16:11:53,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 16:11:53,996 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:53,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:53,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1364109622, now seen corresponding path program 1 times [2021-12-21 16:11:54,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:54,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292558236] [2021-12-21 16:11:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:54,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:54,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:54,121 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 16:11:54,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:54,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292558236] [2021-12-21 16:11:54,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292558236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:54,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:54,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:11:54,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557065282] [2021-12-21 16:11:54,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:54,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:11:54,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:54,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:11:54,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:11:54,124 INFO L87 Difference]: Start difference. First operand 565 states and 801 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 16:11:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:54,844 INFO L93 Difference]: Finished difference Result 1189 states and 1695 transitions. [2021-12-21 16:11:54,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 16:11:54,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 29 [2021-12-21 16:11:54,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:54,848 INFO L225 Difference]: With dead ends: 1189 [2021-12-21 16:11:54,848 INFO L226 Difference]: Without dead ends: 632 [2021-12-21 16:11:54,850 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 16:11:54,850 INFO L933 BasicCegarLoop]: 620 mSDtfsCounter, 701 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:54,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 1344 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 16:11:54,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-12-21 16:11:54,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 564. [2021-12-21 16:11:54,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 455 states have (on average 1.402197802197802) internal successors, (638), 455 states have internal predecessors, (638), 80 states have call successors, (80), 29 states have call predecessors, (80), 28 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2021-12-21 16:11:54,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 797 transitions. [2021-12-21 16:11:54,910 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 797 transitions. Word has length 29 [2021-12-21 16:11:54,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:54,910 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 797 transitions. [2021-12-21 16:11:54,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 16:11:54,911 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 797 transitions. [2021-12-21 16:11:54,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-21 16:11:54,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:54,913 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:11:54,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 16:11:54,914 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:54,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:54,914 INFO L85 PathProgramCache]: Analyzing trace with hash -2094845703, now seen corresponding path program 1 times [2021-12-21 16:11:54,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:54,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70839738] [2021-12-21 16:11:54,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:54,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:55,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:55,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 16:11:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:55,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:11:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-21 16:11:55,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:55,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70839738] [2021-12-21 16:11:55,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70839738] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:55,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:55,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 16:11:55,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912233202] [2021-12-21 16:11:55,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:55,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:11:55,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:55,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:11:55,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:11:55,034 INFO L87 Difference]: Start difference. First operand 564 states and 797 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 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 16:11:55,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:55,676 INFO L93 Difference]: Finished difference Result 1799 states and 2590 transitions. [2021-12-21 16:11:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:11:55,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 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 50 [2021-12-21 16:11:55,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:55,682 INFO L225 Difference]: With dead ends: 1799 [2021-12-21 16:11:55,683 INFO L226 Difference]: Without dead ends: 1238 [2021-12-21 16:11:55,685 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 16:11:55,685 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 491 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 1891 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:55,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [516 Valid, 1891 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 16:11:55,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-12-21 16:11:55,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1138. [2021-12-21 16:11:55,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 917 states have (on average 1.4034896401308614) internal successors, (1287), 919 states have internal predecessors, (1287), 158 states have call successors, (158), 57 states have call predecessors, (158), 62 states have return successors, (179), 161 states have call predecessors, (179), 157 states have call successors, (179) [2021-12-21 16:11:55,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 1624 transitions. [2021-12-21 16:11:55,737 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 1624 transitions. Word has length 50 [2021-12-21 16:11:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:55,738 INFO L470 AbstractCegarLoop]: Abstraction has 1138 states and 1624 transitions. [2021-12-21 16:11:55,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 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 16:11:55,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 1624 transitions. [2021-12-21 16:11:55,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-21 16:11:55,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:55,747 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:11:55,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 16:11:55,747 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:55,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:55,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1094727353, now seen corresponding path program 1 times [2021-12-21 16:11:55,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:55,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136159544] [2021-12-21 16:11:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:55,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:55,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:55,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 16:11:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:55,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-21 16:11:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:55,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:55,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:55,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-21 16:11:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:55,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-21 16:11:55,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-21 16:11:55,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:55,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136159544] [2021-12-21 16:11:55,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136159544] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:55,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:55,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 16:11:55,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698102424] [2021-12-21 16:11:55,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:55,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 16:11:55,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:55,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 16:11:55,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 16:11:55,915 INFO L87 Difference]: Start difference. First operand 1138 states and 1624 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 16:11:56,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:56,543 INFO L93 Difference]: Finished difference Result 1832 states and 2618 transitions. [2021-12-21 16:11:56,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 16:11:56,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 97 [2021-12-21 16:11:56,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:56,546 INFO L225 Difference]: With dead ends: 1832 [2021-12-21 16:11:56,547 INFO L226 Difference]: Without dead ends: 702 [2021-12-21 16:11:56,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 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 16:11:56,549 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 112 mSDsluCounter, 736 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1140 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:56,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 1140 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 16:11:56,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-12-21 16:11:56,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 642. [2021-12-21 16:11:56,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 523 states have (on average 1.395793499043977) internal successors, (730), 525 states have internal predecessors, (730), 83 states have call successors, (83), 31 states have call predecessors, (83), 35 states have return successors, (97), 85 states have call predecessors, (97), 82 states have call successors, (97) [2021-12-21 16:11:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 910 transitions. [2021-12-21 16:11:56,569 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 910 transitions. Word has length 97 [2021-12-21 16:11:56,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:56,569 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 910 transitions. [2021-12-21 16:11:56,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-21 16:11:56,570 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 910 transitions. [2021-12-21 16:11:56,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-21 16:11:56,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:56,572 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 16:11:56,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 16:11:56,572 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:56,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:56,573 INFO L85 PathProgramCache]: Analyzing trace with hash -660311895, now seen corresponding path program 2 times [2021-12-21 16:11:56,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:56,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163247585] [2021-12-21 16:11:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:56,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:56,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:56,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 16:11:56,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:56,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:11:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:56,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:11:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:56,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-21 16:11:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:56,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:56,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:56,772 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-21 16:11:56,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:56,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163247585] [2021-12-21 16:11:56,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163247585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:56,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:56,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 16:11:56,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168609406] [2021-12-21 16:11:56,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:56,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 16:11:56,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:56,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 16:11:56,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:11:56,774 INFO L87 Difference]: Start difference. First operand 642 states and 910 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 16:11:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:57,321 INFO L93 Difference]: Finished difference Result 1288 states and 1855 transitions. [2021-12-21 16:11:57,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 16:11:57,322 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) Word has length 97 [2021-12-21 16:11:57,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:57,324 INFO L225 Difference]: With dead ends: 1288 [2021-12-21 16:11:57,325 INFO L226 Difference]: Without dead ends: 678 [2021-12-21 16:11:57,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-21 16:11:57,326 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 98 mSDsluCounter, 2025 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 2421 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:57,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 2421 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 16:11:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-12-21 16:11:57,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 642. [2021-12-21 16:11:57,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 521 states have (on average 1.3896353166986564) internal successors, (724), 524 states have internal predecessors, (724), 83 states have call successors, (83), 31 states have call predecessors, (83), 37 states have return successors, (101), 86 states have call predecessors, (101), 82 states have call successors, (101) [2021-12-21 16:11:57,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 908 transitions. [2021-12-21 16:11:57,352 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 908 transitions. Word has length 97 [2021-12-21 16:11:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:57,353 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 908 transitions. [2021-12-21 16:11:57,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 16:11:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 908 transitions. [2021-12-21 16:11:57,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 16:11:57,355 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:57,355 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:57,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 16:11:57,355 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:57,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:57,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1628559102, now seen corresponding path program 1 times [2021-12-21 16:11:57,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:57,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945511760] [2021-12-21 16:11:57,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:57,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:57,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:57,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:57,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 16:11:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:57,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:11:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:57,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:11:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:57,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 16:11:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:57,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:57,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:57,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:11:57,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-21 16:11:57,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:57,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945511760] [2021-12-21 16:11:57,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945511760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:57,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:57,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 16:11:57,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138340531] [2021-12-21 16:11:57,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:57,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 16:11:57,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:57,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 16:11:57,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-21 16:11:57,591 INFO L87 Difference]: Start difference. First operand 642 states and 908 transitions. Second operand has 12 states, 12 states have (on average 7.0) internal successors, (84), 8 states have internal predecessors, (84), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 16:11:58,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:58,251 INFO L93 Difference]: Finished difference Result 1292 states and 1853 transitions. [2021-12-21 16:11:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 16:11:58,252 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 8 states have internal predecessors, (84), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) Word has length 109 [2021-12-21 16:11:58,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:58,255 INFO L225 Difference]: With dead ends: 1292 [2021-12-21 16:11:58,255 INFO L226 Difference]: Without dead ends: 682 [2021-12-21 16:11:58,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-21 16:11:58,257 INFO L933 BasicCegarLoop]: 404 mSDtfsCounter, 113 mSDsluCounter, 3155 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 3559 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:58,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 3559 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 16:11:58,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-12-21 16:11:58,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 646. [2021-12-21 16:11:58,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 524 states have (on average 1.381679389312977) internal successors, (724), 526 states have internal predecessors, (724), 84 states have call successors, (84), 31 states have call predecessors, (84), 37 states have return successors, (102), 88 states have call predecessors, (102), 83 states have call successors, (102) [2021-12-21 16:11:58,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 910 transitions. [2021-12-21 16:11:58,277 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 910 transitions. Word has length 109 [2021-12-21 16:11:58,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:58,277 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 910 transitions. [2021-12-21 16:11:58,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 8 states have internal predecessors, (84), 3 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 16:11:58,277 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 910 transitions. [2021-12-21 16:11:58,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-12-21 16:11:58,279 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:58,279 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:58,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 16:11:58,280 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:58,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:58,280 INFO L85 PathProgramCache]: Analyzing trace with hash -556686604, now seen corresponding path program 1 times [2021-12-21 16:11:58,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:58,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395581438] [2021-12-21 16:11:58,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:58,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:58,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:58,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-21 16:11:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:58,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-21 16:11:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:58,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-21 16:11:58,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:58,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-21 16:11:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:58,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:58,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:58,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:11:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:58,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:11:58,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-21 16:11:58,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:58,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395581438] [2021-12-21 16:11:58,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395581438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:58,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:58,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 16:11:58,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871853685] [2021-12-21 16:11:58,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:58,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 16:11:58,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:58,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 16:11:58,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:11:58,432 INFO L87 Difference]: Start difference. First operand 646 states and 910 transitions. Second operand has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 16:11:58,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:11:58,870 INFO L93 Difference]: Finished difference Result 1347 states and 1922 transitions. [2021-12-21 16:11:58,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 16:11:58,870 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 115 [2021-12-21 16:11:58,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:11:58,873 INFO L225 Difference]: With dead ends: 1347 [2021-12-21 16:11:58,873 INFO L226 Difference]: Without dead ends: 719 [2021-12-21 16:11:58,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-21 16:11:58,875 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 140 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 16:11:58,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 1246 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 16:11:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2021-12-21 16:11:58,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 647. [2021-12-21 16:11:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 525 states have (on average 1.380952380952381) internal successors, (725), 527 states have internal predecessors, (725), 84 states have call successors, (84), 31 states have call predecessors, (84), 37 states have return successors, (102), 88 states have call predecessors, (102), 83 states have call successors, (102) [2021-12-21 16:11:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 911 transitions. [2021-12-21 16:11:58,891 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 911 transitions. Word has length 115 [2021-12-21 16:11:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:11:58,892 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 911 transitions. [2021-12-21 16:11:58,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.833333333333334) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 16:11:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 911 transitions. [2021-12-21 16:11:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 16:11:58,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:11:58,894 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:11:58,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 16:11:58,894 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:11:58,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:11:58,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1428826331, now seen corresponding path program 1 times [2021-12-21 16:11:58,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:11:58,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355391341] [2021-12-21 16:11:58,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:11:58,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:11:58,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:59,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:11:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:59,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:11:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:59,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:11:59,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:59,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:11:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:59,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 16:11:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:59,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:59,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:11:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:59,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:11:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:59,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:11:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:11:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-21 16:11:59,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:11:59,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355391341] [2021-12-21 16:11:59,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355391341] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:11:59,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:11:59,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-21 16:11:59,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260976847] [2021-12-21 16:11:59,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:11:59,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 16:11:59,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:11:59,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 16:11:59,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-21 16:11:59,345 INFO L87 Difference]: Start difference. First operand 647 states and 911 transitions. Second operand has 19 states, 18 states have (on average 4.666666666666667) internal successors, (84), 12 states have internal predecessors, (84), 4 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 16:12:01,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:01,360 INFO L93 Difference]: Finished difference Result 1567 states and 2276 transitions. [2021-12-21 16:12:01,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 16:12:01,361 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.666666666666667) internal successors, (84), 12 states have internal predecessors, (84), 4 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) Word has length 111 [2021-12-21 16:12:01,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:01,365 INFO L225 Difference]: With dead ends: 1567 [2021-12-21 16:12:01,366 INFO L226 Difference]: Without dead ends: 953 [2021-12-21 16:12:01,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-12-21 16:12:01,368 INFO L933 BasicCegarLoop]: 556 mSDtfsCounter, 237 mSDsluCounter, 8124 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 8680 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:01,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 8680 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 16:12:01,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-12-21 16:12:01,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 656. [2021-12-21 16:12:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 532 states have (on average 1.3759398496240602) internal successors, (732), 533 states have internal predecessors, (732), 85 states have call successors, (85), 31 states have call predecessors, (85), 38 states have return successors, (105), 91 states have call predecessors, (105), 84 states have call successors, (105) [2021-12-21 16:12:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 922 transitions. [2021-12-21 16:12:01,396 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 922 transitions. Word has length 111 [2021-12-21 16:12:01,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:01,396 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 922 transitions. [2021-12-21 16:12:01,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.666666666666667) internal successors, (84), 12 states have internal predecessors, (84), 4 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 16:12:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 922 transitions. [2021-12-21 16:12:01,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-21 16:12:01,398 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:01,398 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:12:01,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 16:12:01,399 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:01,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:01,399 INFO L85 PathProgramCache]: Analyzing trace with hash -363635253, now seen corresponding path program 1 times [2021-12-21 16:12:01,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:01,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479576080] [2021-12-21 16:12:01,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:01,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:01,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:01,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:01,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:12:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:01,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:12:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:01,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:12:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:01,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:12:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:01,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:01,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:01,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:01,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:12:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:01,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:12:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:01,598 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-12-21 16:12:01,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:01,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479576080] [2021-12-21 16:12:01,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479576080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:12:01,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:12:01,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 16:12:01,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894584732] [2021-12-21 16:12:01,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:12:01,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:12:01,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:01,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:12:01,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:12:01,601 INFO L87 Difference]: Start difference. First operand 656 states and 922 transitions. Second operand has 8 states, 8 states have (on average 11.0) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 16:12:02,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:02,783 INFO L93 Difference]: Finished difference Result 1520 states and 2195 transitions. [2021-12-21 16:12:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 16:12:02,783 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 116 [2021-12-21 16:12:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:02,786 INFO L225 Difference]: With dead ends: 1520 [2021-12-21 16:12:02,786 INFO L226 Difference]: Without dead ends: 897 [2021-12-21 16:12:02,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:12:02,788 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 186 mSDsluCounter, 1497 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1949 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:02,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 1949 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 16:12:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-12-21 16:12:02,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 664. [2021-12-21 16:12:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 540 states have (on average 1.3777777777777778) internal successors, (744), 541 states have internal predecessors, (744), 85 states have call successors, (85), 31 states have call predecessors, (85), 38 states have return successors, (105), 91 states have call predecessors, (105), 84 states have call successors, (105) [2021-12-21 16:12:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 934 transitions. [2021-12-21 16:12:02,833 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 934 transitions. Word has length 116 [2021-12-21 16:12:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:02,833 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 934 transitions. [2021-12-21 16:12:02,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.0) internal successors, (88), 5 states have internal predecessors, (88), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-21 16:12:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 934 transitions. [2021-12-21 16:12:02,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-21 16:12:02,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:02,835 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:12:02,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 16:12:02,835 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:02,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:02,836 INFO L85 PathProgramCache]: Analyzing trace with hash -161811319, now seen corresponding path program 1 times [2021-12-21 16:12:02,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:02,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71333857] [2021-12-21 16:12:02,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:02,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:02,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:02,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:12:02,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:02,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:12:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:02,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:12:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:02,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:12:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:03,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:03,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:03,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:03,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:03,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:12:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:03,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:12:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-21 16:12:03,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:03,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71333857] [2021-12-21 16:12:03,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71333857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:12:03,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:12:03,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-12-21 16:12:03,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86341231] [2021-12-21 16:12:03,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:12:03,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-21 16:12:03,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:03,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-21 16:12:03,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-12-21 16:12:03,252 INFO L87 Difference]: Start difference. First operand 664 states and 934 transitions. Second operand has 19 states, 18 states have (on average 4.944444444444445) internal successors, (89), 12 states have internal predecessors, (89), 4 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 16:12:04,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:04,077 INFO L93 Difference]: Finished difference Result 1386 states and 1981 transitions. [2021-12-21 16:12:04,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-21 16:12:04,077 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.944444444444445) internal successors, (89), 12 states have internal predecessors, (89), 4 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) Word has length 116 [2021-12-21 16:12:04,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:04,080 INFO L225 Difference]: With dead ends: 1386 [2021-12-21 16:12:04,080 INFO L226 Difference]: Without dead ends: 755 [2021-12-21 16:12:04,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-12-21 16:12:04,082 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 214 mSDsluCounter, 5188 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 5600 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:04,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 5600 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 16:12:04,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2021-12-21 16:12:04,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 668. [2021-12-21 16:12:04,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 544 states have (on average 1.375) internal successors, (748), 543 states have internal predecessors, (748), 85 states have call successors, (85), 31 states have call predecessors, (85), 38 states have return successors, (105), 93 states have call predecessors, (105), 84 states have call successors, (105) [2021-12-21 16:12:04,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 938 transitions. [2021-12-21 16:12:04,105 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 938 transitions. Word has length 116 [2021-12-21 16:12:04,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:04,105 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 938 transitions. [2021-12-21 16:12:04,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.944444444444445) internal successors, (89), 12 states have internal predecessors, (89), 4 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 16:12:04,106 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 938 transitions. [2021-12-21 16:12:04,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-12-21 16:12:04,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:04,108 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 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 16:12:04,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 16:12:04,108 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:04,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:04,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1915934418, now seen corresponding path program 1 times [2021-12-21 16:12:04,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:04,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872734250] [2021-12-21 16:12:04,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:04,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:04,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:04,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:12:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:04,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:12:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:04,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:12:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:04,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:12:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:04,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 16:12:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:04,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-21 16:12:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:04,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:04,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 16:12:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:04,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 16:12:04,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:04,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872734250] [2021-12-21 16:12:04,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872734250] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:12:04,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:12:04,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 16:12:04,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134564419] [2021-12-21 16:12:04,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:12:04,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 16:12:04,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:04,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 16:12:04,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:12:04,236 INFO L87 Difference]: Start difference. First operand 668 states and 938 transitions. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-21 16:12:04,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:04,929 INFO L93 Difference]: Finished difference Result 1067 states and 1523 transitions. [2021-12-21 16:12:04,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:12:04,930 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) Word has length 121 [2021-12-21 16:12:04,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:04,933 INFO L225 Difference]: With dead ends: 1067 [2021-12-21 16:12:04,933 INFO L226 Difference]: Without dead ends: 741 [2021-12-21 16:12:04,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-21 16:12:04,934 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 202 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:04,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 1438 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 16:12:04,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-12-21 16:12:04,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 670. [2021-12-21 16:12:04,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 546 states have (on average 1.3736263736263736) internal successors, (750), 545 states have internal predecessors, (750), 85 states have call successors, (85), 31 states have call predecessors, (85), 38 states have return successors, (105), 93 states have call predecessors, (105), 84 states have call successors, (105) [2021-12-21 16:12:04,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 940 transitions. [2021-12-21 16:12:04,959 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 940 transitions. Word has length 121 [2021-12-21 16:12:04,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:04,959 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 940 transitions. [2021-12-21 16:12:04,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-21 16:12:04,959 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 940 transitions. [2021-12-21 16:12:04,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-21 16:12:04,961 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:04,961 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 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 16:12:04,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 16:12:04,961 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:04,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:04,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1115994769, now seen corresponding path program 1 times [2021-12-21 16:12:04,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:04,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401529267] [2021-12-21 16:12:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:04,962 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:05,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:05,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:05,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:12:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:05,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:12:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:05,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:12:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:05,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:12:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:05,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-21 16:12:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:05,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-21 16:12:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:05,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:05,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-21 16:12:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:05,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:05,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-21 16:12:05,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:05,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401529267] [2021-12-21 16:12:05,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401529267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:12:05,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:12:05,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-21 16:12:05,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832327186] [2021-12-21 16:12:05,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:12:05,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 16:12:05,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:05,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 16:12:05,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-21 16:12:05,132 INFO L87 Difference]: Start difference. First operand 670 states and 940 transitions. Second operand has 12 states, 11 states have (on average 8.636363636363637) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 16:12:06,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:06,336 INFO L93 Difference]: Finished difference Result 1415 states and 2001 transitions. [2021-12-21 16:12:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 16:12:06,336 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 8.636363636363637) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2021-12-21 16:12:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:06,339 INFO L225 Difference]: With dead ends: 1415 [2021-12-21 16:12:06,339 INFO L226 Difference]: Without dead ends: 778 [2021-12-21 16:12:06,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=526, Unknown=0, NotChecked=0, Total=702 [2021-12-21 16:12:06,341 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 989 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1688 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:06,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 1688 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 16:12:06,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2021-12-21 16:12:06,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 688. [2021-12-21 16:12:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 558 states have (on average 1.3620071684587813) internal successors, (760), 558 states have internal predecessors, (760), 88 states have call successors, (88), 33 states have call predecessors, (88), 41 states have return successors, (106), 96 states have call predecessors, (106), 87 states have call successors, (106) [2021-12-21 16:12:06,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 954 transitions. [2021-12-21 16:12:06,368 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 954 transitions. Word has length 123 [2021-12-21 16:12:06,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:06,369 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 954 transitions. [2021-12-21 16:12:06,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 8.636363636363637) internal successors, (95), 7 states have internal predecessors, (95), 4 states have call successors, (11), 7 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-21 16:12:06,369 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 954 transitions. [2021-12-21 16:12:06,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-21 16:12:06,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:06,371 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:12:06,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 16:12:06,371 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:06,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:06,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1527207652, now seen corresponding path program 1 times [2021-12-21 16:12:06,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:06,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433830927] [2021-12-21 16:12:06,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:06,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:06,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:06,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:12:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:06,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:12:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:06,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:12:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:06,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:12:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:06,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:06,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:06,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:12:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:06,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:12:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:06,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 16:12:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:06,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-21 16:12:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:06,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 16:12:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:06,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-21 16:12:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 16:12:06,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:06,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433830927] [2021-12-21 16:12:06,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433830927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:12:06,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:12:06,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-21 16:12:06,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586411965] [2021-12-21 16:12:06,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:12:06,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 16:12:06,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:06,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 16:12:06,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 16:12:06,565 INFO L87 Difference]: Start difference. First operand 688 states and 954 transitions. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 16:12:07,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:07,491 INFO L93 Difference]: Finished difference Result 1617 states and 2297 transitions. [2021-12-21 16:12:07,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 16:12:07,492 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 139 [2021-12-21 16:12:07,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:07,496 INFO L225 Difference]: With dead ends: 1617 [2021-12-21 16:12:07,496 INFO L226 Difference]: Without dead ends: 962 [2021-12-21 16:12:07,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-21 16:12:07,498 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 306 mSDsluCounter, 1306 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:07,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 1822 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 16:12:07,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2021-12-21 16:12:07,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 684. [2021-12-21 16:12:07,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 556 states have (on average 1.3597122302158273) internal successors, (756), 556 states have internal predecessors, (756), 86 states have call successors, (86), 33 states have call predecessors, (86), 41 states have return successors, (104), 94 states have call predecessors, (104), 85 states have call successors, (104) [2021-12-21 16:12:07,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 946 transitions. [2021-12-21 16:12:07,524 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 946 transitions. Word has length 139 [2021-12-21 16:12:07,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:07,524 INFO L470 AbstractCegarLoop]: Abstraction has 684 states and 946 transitions. [2021-12-21 16:12:07,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 3 states have internal predecessors, (101), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 16:12:07,524 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 946 transitions. [2021-12-21 16:12:07,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-21 16:12:07,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:07,526 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:12:07,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 16:12:07,526 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:07,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:07,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1475201316, now seen corresponding path program 1 times [2021-12-21 16:12:07,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:07,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673853603] [2021-12-21 16:12:07,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:07,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:07,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:07,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:12:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:07,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:12:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:07,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:12:07,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:07,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:12:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:07,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:07,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:07,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:12:07,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:07,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:12:07,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:07,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 16:12:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:07,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-21 16:12:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:07,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 16:12:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:07,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-21 16:12:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:07,712 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 16:12:07,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:07,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673853603] [2021-12-21 16:12:07,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673853603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 16:12:07,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 16:12:07,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 16:12:07,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347365574] [2021-12-21 16:12:07,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:12:07,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 16:12:07,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:07,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 16:12:07,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-21 16:12:07,715 INFO L87 Difference]: Start difference. First operand 684 states and 946 transitions. Second operand has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-21 16:12:08,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:08,655 INFO L93 Difference]: Finished difference Result 1619 states and 2299 transitions. [2021-12-21 16:12:08,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 16:12:08,661 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) Word has length 139 [2021-12-21 16:12:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:08,664 INFO L225 Difference]: With dead ends: 1619 [2021-12-21 16:12:08,664 INFO L226 Difference]: Without dead ends: 968 [2021-12-21 16:12:08,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-21 16:12:08,667 INFO L933 BasicCegarLoop]: 512 mSDtfsCounter, 224 mSDsluCounter, 2242 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 2754 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:08,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 2754 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 16:12:08,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-12-21 16:12:08,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 692. [2021-12-21 16:12:08,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 562 states have (on average 1.3629893238434163) internal successors, (766), 564 states have internal predecessors, (766), 86 states have call successors, (86), 33 states have call predecessors, (86), 43 states have return successors, (108), 94 states have call predecessors, (108), 85 states have call successors, (108) [2021-12-21 16:12:08,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 960 transitions. [2021-12-21 16:12:08,712 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 960 transitions. Word has length 139 [2021-12-21 16:12:08,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:08,713 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 960 transitions. [2021-12-21 16:12:08,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.222222222222221) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (14), 6 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 3 states have call successors, (13) [2021-12-21 16:12:08,713 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 960 transitions. [2021-12-21 16:12:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-21 16:12:08,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:08,732 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:12:08,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 16:12:08,732 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:08,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:08,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1269181933, now seen corresponding path program 1 times [2021-12-21 16:12:08,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:08,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353907113] [2021-12-21 16:12:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:08,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:08,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:08,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:12:08,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:08,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:12:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:08,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:12:08,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:08,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:12:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:08,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:08,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:08,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:12:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:08,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:12:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:08,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 16:12:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:09,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-21 16:12:09,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:09,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-21 16:12:09,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:09,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 16:12:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 16:12:09,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:09,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353907113] [2021-12-21 16:12:09,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353907113] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:12:09,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632262353] [2021-12-21 16:12:09,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:09,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:09,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:09,067 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 16:12:09,070 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 16:12:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:09,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 16:12:09,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:12:09,687 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 16:12:09,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:12:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 16:12:09,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632262353] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 16:12:09,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 16:12:09,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10, 5] total 11 [2021-12-21 16:12:09,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790071271] [2021-12-21 16:12:09,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 16:12:09,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 16:12:09,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:09,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 16:12:09,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-21 16:12:09,966 INFO L87 Difference]: Start difference. First operand 692 states and 960 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 16:12:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:10,093 INFO L93 Difference]: Finished difference Result 1359 states and 1901 transitions. [2021-12-21 16:12:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 16:12:10,094 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 140 [2021-12-21 16:12:10,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:10,096 INFO L225 Difference]: With dead ends: 1359 [2021-12-21 16:12:10,096 INFO L226 Difference]: Without dead ends: 700 [2021-12-21 16:12:10,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 298 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-21 16:12:10,098 INFO L933 BasicCegarLoop]: 411 mSDtfsCounter, 3 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:10,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 815 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 16:12:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-12-21 16:12:10,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 694. [2021-12-21 16:12:10,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 564 states have (on average 1.3617021276595744) internal successors, (768), 566 states have internal predecessors, (768), 86 states have call successors, (86), 33 states have call predecessors, (86), 43 states have return successors, (108), 94 states have call predecessors, (108), 85 states have call successors, (108) [2021-12-21 16:12:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 962 transitions. [2021-12-21 16:12:10,151 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 962 transitions. Word has length 140 [2021-12-21 16:12:10,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:10,152 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 962 transitions. [2021-12-21 16:12:10,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-21 16:12:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 962 transitions. [2021-12-21 16:12:10,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-21 16:12:10,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:10,154 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:12:10,184 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 16:12:10,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 16:12:10,382 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:10,382 INFO L85 PathProgramCache]: Analyzing trace with hash 316514682, now seen corresponding path program 1 times [2021-12-21 16:12:10,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:10,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108994503] [2021-12-21 16:12:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:10,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:10,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:10,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:12:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:10,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:12:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:10,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:12:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:10,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:12:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:10,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:10,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:10,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:12:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:10,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:12:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:10,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 16:12:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:10,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-21 16:12:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:10,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-21 16:12:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:10,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-21 16:12:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 16:12:10,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:10,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108994503] [2021-12-21 16:12:10,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108994503] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:12:10,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102198187] [2021-12-21 16:12:10,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:10,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:10,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:10,656 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 16:12:10,701 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 16:12:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:11,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 1275 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 16:12:11,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:12:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 16:12:11,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:12:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 16:12:12,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102198187] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:12:12,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 16:12:12,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2021-12-21 16:12:12,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57552876] [2021-12-21 16:12:12,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 16:12:12,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 16:12:12,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:12,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 16:12:12,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-12-21 16:12:12,110 INFO L87 Difference]: Start difference. First operand 694 states and 962 transitions. Second operand has 15 states, 15 states have (on average 8.2) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-21 16:12:13,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:13,086 INFO L93 Difference]: Finished difference Result 1641 states and 2331 transitions. [2021-12-21 16:12:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 16:12:13,086 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.2) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) Word has length 141 [2021-12-21 16:12:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:13,090 INFO L225 Difference]: With dead ends: 1641 [2021-12-21 16:12:13,090 INFO L226 Difference]: Without dead ends: 980 [2021-12-21 16:12:13,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 296 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-12-21 16:12:13,092 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 398 mSDsluCounter, 3782 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 4296 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:13,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 4296 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 16:12:13,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-12-21 16:12:13,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 698. [2021-12-21 16:12:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 568 states have (on average 1.3626760563380282) internal successors, (774), 570 states have internal predecessors, (774), 86 states have call successors, (86), 33 states have call predecessors, (86), 43 states have return successors, (108), 94 states have call predecessors, (108), 85 states have call successors, (108) [2021-12-21 16:12:13,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 968 transitions. [2021-12-21 16:12:13,119 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 968 transitions. Word has length 141 [2021-12-21 16:12:13,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:13,119 INFO L470 AbstractCegarLoop]: Abstraction has 698 states and 968 transitions. [2021-12-21 16:12:13,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.2) internal successors, (123), 11 states have internal predecessors, (123), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-21 16:12:13,120 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 968 transitions. [2021-12-21 16:12:13,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-21 16:12:13,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:13,122 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:12:13,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 16:12:13,337 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,SelfDestructingSolverStorable15 [2021-12-21 16:12:13,337 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:13,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:13,338 INFO L85 PathProgramCache]: Analyzing trace with hash 558897227, now seen corresponding path program 2 times [2021-12-21 16:12:13,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:13,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394731256] [2021-12-21 16:12:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:13,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:13,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:13,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:12:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:13,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:12:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:13,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:12:13,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:13,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:12:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:13,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:13,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:13,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:12:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:13,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:12:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:13,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 16:12:13,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:13,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-21 16:12:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:13,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-21 16:12:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:13,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-21 16:12:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:13,650 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 16:12:13,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:13,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394731256] [2021-12-21 16:12:13,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394731256] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:12:13,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433450798] [2021-12-21 16:12:13,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 16:12:13,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:13,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:13,668 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 16:12:13,669 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 16:12:14,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 16:12:14,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 16:12:14,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1357 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 16:12:14,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:12:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 16:12:14,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:12:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 16:12:14,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433450798] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:12:14,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 16:12:14,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 18 [2021-12-21 16:12:14,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796354858] [2021-12-21 16:12:14,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 16:12:14,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 16:12:14,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:14,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 16:12:14,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-12-21 16:12:14,877 INFO L87 Difference]: Start difference. First operand 698 states and 968 transitions. Second operand has 18 states, 18 states have (on average 7.0) internal successors, (126), 14 states have internal predecessors, (126), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-21 16:12:16,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:16,130 INFO L93 Difference]: Finished difference Result 1655 states and 2353 transitions. [2021-12-21 16:12:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 16:12:16,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.0) internal successors, (126), 14 states have internal predecessors, (126), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) Word has length 142 [2021-12-21 16:12:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:16,134 INFO L225 Difference]: With dead ends: 1655 [2021-12-21 16:12:16,134 INFO L226 Difference]: Without dead ends: 990 [2021-12-21 16:12:16,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 296 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2021-12-21 16:12:16,136 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 378 mSDsluCounter, 4736 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 5250 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:16,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 5250 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1003 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 16:12:16,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-12-21 16:12:16,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 700. [2021-12-21 16:12:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 570 states have (on average 1.3649122807017544) internal successors, (778), 572 states have internal predecessors, (778), 86 states have call successors, (86), 33 states have call predecessors, (86), 43 states have return successors, (108), 94 states have call predecessors, (108), 85 states have call successors, (108) [2021-12-21 16:12:16,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 972 transitions. [2021-12-21 16:12:16,163 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 972 transitions. Word has length 142 [2021-12-21 16:12:16,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:16,163 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 972 transitions. [2021-12-21 16:12:16,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.0) internal successors, (126), 14 states have internal predecessors, (126), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-21 16:12:16,164 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 972 transitions. [2021-12-21 16:12:16,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-21 16:12:16,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:16,166 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:12:16,186 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 16:12:16,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:16,381 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:16,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:16,381 INFO L85 PathProgramCache]: Analyzing trace with hash -517178470, now seen corresponding path program 3 times [2021-12-21 16:12:16,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:16,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013875291] [2021-12-21 16:12:16,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:16,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:16,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:16,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:12:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:16,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:12:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:16,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:12:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:16,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:12:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:16,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:16,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:16,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:12:16,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:16,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:12:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:16,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 16:12:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:16,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-21 16:12:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:16,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-21 16:12:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:16,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-21 16:12:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 16:12:16,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:16,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013875291] [2021-12-21 16:12:16,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013875291] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:12:16,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015061061] [2021-12-21 16:12:16,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 16:12:16,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:16,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:16,759 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 16:12:16,781 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 16:12:29,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-21 16:12:29,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 16:12:29,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-21 16:12:29,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:12:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 16:12:30,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:12:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 16:12:30,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015061061] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:12:30,623 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 16:12:30,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 21 [2021-12-21 16:12:30,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519269377] [2021-12-21 16:12:30,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 16:12:30,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 16:12:30,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:30,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 16:12:30,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-12-21 16:12:30,624 INFO L87 Difference]: Start difference. First operand 700 states and 972 transitions. Second operand has 21 states, 21 states have (on average 6.142857142857143) internal successors, (129), 17 states have internal predecessors, (129), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-21 16:12:32,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:32,631 INFO L93 Difference]: Finished difference Result 1667 states and 2373 transitions. [2021-12-21 16:12:32,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 16:12:32,632 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.142857142857143) internal successors, (129), 17 states have internal predecessors, (129), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) Word has length 143 [2021-12-21 16:12:32,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:32,635 INFO L225 Difference]: With dead ends: 1667 [2021-12-21 16:12:32,635 INFO L226 Difference]: Without dead ends: 1000 [2021-12-21 16:12:32,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 296 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2021-12-21 16:12:32,637 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 322 mSDsluCounter, 4762 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 5277 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:32,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 5277 Invalid, 1542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1457 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-21 16:12:32,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2021-12-21 16:12:32,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 702. [2021-12-21 16:12:32,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 572 states have (on average 1.367132867132867) internal successors, (782), 574 states have internal predecessors, (782), 86 states have call successors, (86), 33 states have call predecessors, (86), 43 states have return successors, (108), 94 states have call predecessors, (108), 85 states have call successors, (108) [2021-12-21 16:12:32,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 976 transitions. [2021-12-21 16:12:32,666 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 976 transitions. Word has length 143 [2021-12-21 16:12:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:32,666 INFO L470 AbstractCegarLoop]: Abstraction has 702 states and 976 transitions. [2021-12-21 16:12:32,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.142857142857143) internal successors, (129), 17 states have internal predecessors, (129), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-21 16:12:32,667 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 976 transitions. [2021-12-21 16:12:32,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-21 16:12:32,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:32,668 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:12:32,683 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 16:12:32,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-21 16:12:32,882 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:32,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:32,883 INFO L85 PathProgramCache]: Analyzing trace with hash 484213291, now seen corresponding path program 4 times [2021-12-21 16:12:32,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:32,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992508228] [2021-12-21 16:12:32,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:32,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:33,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:33,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:33,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:12:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:33,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:12:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:33,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:12:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:33,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:12:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:33,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:33,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:33,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:12:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:33,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:12:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:33,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 16:12:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:33,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2021-12-21 16:12:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:33,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-21 16:12:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:33,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-21 16:12:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 16:12:33,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:33,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992508228] [2021-12-21 16:12:33,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992508228] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:12:33,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747916068] [2021-12-21 16:12:33,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 16:12:33,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:33,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:33,404 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 16:12:33,405 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 16:12:36,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 16:12:36,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 16:12:36,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 1521 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-21 16:12:36,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 16:12:37,082 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 16:12:37,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 16:12:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 16:12:37,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747916068] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 16:12:37,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 16:12:37,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 22 [2021-12-21 16:12:37,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034599249] [2021-12-21 16:12:37,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 16:12:37,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-21 16:12:37,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 16:12:37,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-21 16:12:37,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-12-21 16:12:37,507 INFO L87 Difference]: Start difference. First operand 702 states and 976 transitions. Second operand has 22 states, 22 states have (on average 5.909090909090909) internal successors, (130), 18 states have internal predecessors, (130), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-21 16:12:39,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 16:12:39,668 INFO L93 Difference]: Finished difference Result 1679 states and 2393 transitions. [2021-12-21 16:12:39,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 16:12:39,669 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.909090909090909) internal successors, (130), 18 states have internal predecessors, (130), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) Word has length 144 [2021-12-21 16:12:39,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 16:12:39,673 INFO L225 Difference]: With dead ends: 1679 [2021-12-21 16:12:39,673 INFO L226 Difference]: Without dead ends: 1010 [2021-12-21 16:12:39,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 297 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-12-21 16:12:39,676 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 577 mSDsluCounter, 5819 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 6335 SdHoareTripleChecker+Invalid, 1547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-21 16:12:39,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [598 Valid, 6335 Invalid, 1547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-21 16:12:39,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-12-21 16:12:39,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 704. [2021-12-21 16:12:39,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 574 states have (on average 1.3693379790940767) internal successors, (786), 576 states have internal predecessors, (786), 86 states have call successors, (86), 33 states have call predecessors, (86), 43 states have return successors, (108), 94 states have call predecessors, (108), 85 states have call successors, (108) [2021-12-21 16:12:39,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 980 transitions. [2021-12-21 16:12:39,715 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 980 transitions. Word has length 144 [2021-12-21 16:12:39,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 16:12:39,715 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 980 transitions. [2021-12-21 16:12:39,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.909090909090909) internal successors, (130), 18 states have internal predecessors, (130), 4 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (18), 2 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-21 16:12:39,715 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 980 transitions. [2021-12-21 16:12:39,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-21 16:12:39,717 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 16:12:39,717 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 16:12:39,761 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 16:12:39,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:39,944 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 16:12:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 16:12:39,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1462586810, now seen corresponding path program 5 times [2021-12-21 16:12:39,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 16:12:39,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708572809] [2021-12-21 16:12:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 16:12:39,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 16:12:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:40,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 16:12:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:40,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-21 16:12:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:40,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-21 16:12:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:40,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-21 16:12:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:40,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 16:12:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:40,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:40,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:40,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-21 16:12:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:40,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 16:12:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:40,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-21 16:12:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:40,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-21 16:12:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:40,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-21 16:12:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:40,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-21 16:12:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:40,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-21 16:12:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 16:12:40,382 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 16:12:40,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 16:12:40,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708572809] [2021-12-21 16:12:40,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708572809] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 16:12:40,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102439623] [2021-12-21 16:12:40,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 16:12:40,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 16:12:40,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 16:12:40,400 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 16:12:40,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process