./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/Problem05_label45+token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/combinations/Problem05_label45+token_ring.05.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-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 32bit --witnessprinter.graph.data.programhash 27587b975a36272f97d565edc796c457ff04a64b538fe9933b800d0dda8dcceb --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 15:43:50,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 15:43:50,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 15:43:50,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 15:43:50,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 15:43:50,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 15:43:50,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 15:43:50,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 15:43:50,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 15:43:50,202 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 15:43:50,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 15:43:50,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 15:43:50,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 15:43:50,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 15:43:50,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 15:43:50,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 15:43:50,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 15:43:50,212 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 15:43:50,214 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 15:43:50,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 15:43:50,219 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 15:43:50,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 15:43:50,221 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 15:43:50,221 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 15:43:50,226 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 15:43:50,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 15:43:50,226 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 15:43:50,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 15:43:50,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 15:43:50,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 15:43:50,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 15:43:50,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 15:43:50,230 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 15:43:50,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 15:43:50,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 15:43:50,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 15:43:50,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 15:43:50,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 15:43:50,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 15:43:50,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 15:43:50,233 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 15:43:50,234 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 15:43:50,257 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 15:43:50,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 15:43:50,258 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 15:43:50,258 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 15:43:50,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 15:43:50,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 15:43:50,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 15:43:50,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 15:43:50,260 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 15:43:50,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 15:43:50,260 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 15:43:50,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 15:43:50,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 15:43:50,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 15:43:50,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 15:43:50,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 15:43:50,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 15:43:50,261 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 15:43:50,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 15:43:50,262 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 15:43:50,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 15:43:50,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 15:43:50,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 15:43:50,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 15:43:50,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:43:50,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 15:43:50,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 15:43:50,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 15:43:50,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 15:43:50,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 15:43:50,264 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 15:43:50,264 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 15:43:50,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 15:43:50,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 15:43:50,265 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27587b975a36272f97d565edc796c457ff04a64b538fe9933b800d0dda8dcceb [2021-12-14 15:43:50,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 15:43:50,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 15:43:50,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 15:43:50,443 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 15:43:50,444 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 15:43:50,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/Problem05_label45+token_ring.05.cil-2.c [2021-12-14 15:43:50,483 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42046089b/aa1b018a505746ada709841ce0e0b39f/FLAG8e247f001 [2021-12-14 15:43:51,365 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 15:43:51,366 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/Problem05_label45+token_ring.05.cil-2.c [2021-12-14 15:43:51,417 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42046089b/aa1b018a505746ada709841ce0e0b39f/FLAG8e247f001 [2021-12-14 15:43:51,781 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42046089b/aa1b018a505746ada709841ce0e0b39f [2021-12-14 15:43:51,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 15:43:51,784 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 15:43:51,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 15:43:51,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 15:43:51,787 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 15:43:51,788 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:43:51" (1/1) ... [2021-12-14 15:43:51,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bdea57e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:51, skipping insertion in model container [2021-12-14 15:43:51,789 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 03:43:51" (1/1) ... [2021-12-14 15:43:51,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 15:43:52,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 15:43:53,477 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/combinations/Problem05_label45+token_ring.05.cil-2.c[380323,380336] [2021-12-14 15:43:53,502 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/combinations/Problem05_label45+token_ring.05.cil-2.c[383339,383352] [2021-12-14 15:43:53,654 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:43:53,661 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 15:43:54,279 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/combinations/Problem05_label45+token_ring.05.cil-2.c[380323,380336] [2021-12-14 15:43:54,286 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/combinations/Problem05_label45+token_ring.05.cil-2.c[383339,383352] [2021-12-14 15:43:54,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 15:43:54,350 INFO L208 MainTranslator]: Completed translation [2021-12-14 15:43:54,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:54 WrapperNode [2021-12-14 15:43:54,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 15:43:54,351 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 15:43:54,351 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 15:43:54,351 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 15:43:54,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:54" (1/1) ... [2021-12-14 15:43:54,425 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:54" (1/1) ... [2021-12-14 15:43:54,772 INFO L137 Inliner]: procedures = 54, calls = 57, calls flagged for inlining = 31, calls inlined = 31, statements flattened = 12798 [2021-12-14 15:43:54,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 15:43:54,774 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 15:43:54,774 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 15:43:54,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 15:43:54,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:54" (1/1) ... [2021-12-14 15:43:54,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:54" (1/1) ... [2021-12-14 15:43:54,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:54" (1/1) ... [2021-12-14 15:43:54,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:54" (1/1) ... [2021-12-14 15:43:55,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:54" (1/1) ... [2021-12-14 15:43:55,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:54" (1/1) ... [2021-12-14 15:43:55,306 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:54" (1/1) ... [2021-12-14 15:43:55,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 15:43:55,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 15:43:55,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 15:43:55,376 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 15:43:55,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:54" (1/1) ... [2021-12-14 15:43:55,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 15:43:55,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:43:55,433 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) [2021-12-14 15:43:55,455 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 [2021-12-14 15:43:55,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 15:43:55,483 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-14 15:43:55,483 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-14 15:43:55,483 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 15:43:55,483 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 15:43:55,483 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-14 15:43:55,483 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-14 15:43:55,484 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-14 15:43:55,484 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-14 15:43:55,484 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-14 15:43:55,484 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-14 15:43:55,484 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-14 15:43:55,484 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-14 15:43:55,484 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-14 15:43:55,484 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-14 15:43:55,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 15:43:55,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 15:43:55,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 15:43:55,623 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 15:43:55,624 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 15:44:00,376 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 15:44:00,398 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 15:44:00,398 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-14 15:44:00,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:44:00 BoogieIcfgContainer [2021-12-14 15:44:00,401 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 15:44:00,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 15:44:00,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 15:44:00,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 15:44:00,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 03:43:51" (1/3) ... [2021-12-14 15:44:00,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500650a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:44:00, skipping insertion in model container [2021-12-14 15:44:00,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 03:43:54" (2/3) ... [2021-12-14 15:44:00,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@500650a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 03:44:00, skipping insertion in model container [2021-12-14 15:44:00,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 03:44:00" (3/3) ... [2021-12-14 15:44:00,408 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.05.cil-2.c [2021-12-14 15:44:00,411 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 15:44:00,412 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-14 15:44:00,448 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 15:44:00,452 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 [2021-12-14 15:44:00,452 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-14 15:44:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand has 2398 states, 2367 states have (on average 1.85297845373891) internal successors, (4386), 2372 states have internal predecessors, (4386), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-14 15:44:00,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 15:44:00,497 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:00,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:00,498 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:00,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:00,501 INFO L85 PathProgramCache]: Analyzing trace with hash -645844934, now seen corresponding path program 1 times [2021-12-14 15:44:00,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:00,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573257351] [2021-12-14 15:44:00,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:00,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:00,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:00,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:44:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:00,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 15:44:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:00,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:44:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:00,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:44:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:44:00,738 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:00,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573257351] [2021-12-14 15:44:00,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573257351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:00,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:44:00,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 15:44:00,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664926086] [2021-12-14 15:44:00,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:00,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 15:44:00,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:00,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 15:44:00,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 15:44:00,774 INFO L87 Difference]: Start difference. First operand has 2398 states, 2367 states have (on average 1.85297845373891) internal successors, (4386), 2372 states have internal predecessors, (4386), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:01,481 INFO L93 Difference]: Finished difference Result 4852 states and 8953 transitions. [2021-12-14 15:44:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 15:44:01,483 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-14 15:44:01,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:01,498 INFO L225 Difference]: With dead ends: 4852 [2021-12-14 15:44:01,498 INFO L226 Difference]: Without dead ends: 2395 [2021-12-14 15:44:01,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:01,506 INFO L933 BasicCegarLoop]: 4373 mSDtfsCounter, 521 mSDsluCounter, 12314 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 16687 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 15:44:01,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 16687 Invalid, 389 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [50 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 15:44:01,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-12-14 15:44:01,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2330. [2021-12-14 15:44:01,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2301 states have (on average 1.841373315949587) internal successors, (4237), 2304 states have internal predecessors, (4237), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-14 15:44:01,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 4277 transitions. [2021-12-14 15:44:01,732 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 4277 transitions. Word has length 102 [2021-12-14 15:44:01,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:01,732 INFO L470 AbstractCegarLoop]: Abstraction has 2330 states and 4277 transitions. [2021-12-14 15:44:01,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:01,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 4277 transitions. [2021-12-14 15:44:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 15:44:01,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:01,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:01,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 15:44:01,737 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:01,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:01,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1294737080, now seen corresponding path program 1 times [2021-12-14 15:44:01,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:01,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723350932] [2021-12-14 15:44:01,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:01,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:01,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:01,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:44:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:01,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 15:44:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:01,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:44:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:01,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:44:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:44:01,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:01,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723350932] [2021-12-14 15:44:01,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723350932] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:01,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:44:01,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:44:01,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681203733] [2021-12-14 15:44:01,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:01,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:44:01,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:01,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:44:01,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:44:01,899 INFO L87 Difference]: Start difference. First operand 2330 states and 4277 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:02,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:02,945 INFO L93 Difference]: Finished difference Result 2856 states and 5108 transitions. [2021-12-14 15:44:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 15:44:02,946 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-14 15:44:02,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:02,956 INFO L225 Difference]: With dead ends: 2856 [2021-12-14 15:44:02,956 INFO L226 Difference]: Without dead ends: 2660 [2021-12-14 15:44:02,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:44:02,959 INFO L933 BasicCegarLoop]: 4328 mSDtfsCounter, 4721 mSDsluCounter, 12456 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4733 SdHoareTripleChecker+Valid, 16784 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 15:44:02,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4733 Valid, 16784 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 15:44:02,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2021-12-14 15:44:03,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2529. [2021-12-14 15:44:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2479 states have (on average 1.8217022993142395) internal successors, (4516), 2483 states have internal predecessors, (4516), 35 states have call successors, (35), 13 states have call predecessors, (35), 13 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-14 15:44:03,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 4587 transitions. [2021-12-14 15:44:03,014 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 4587 transitions. Word has length 102 [2021-12-14 15:44:03,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:03,014 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 4587 transitions. [2021-12-14 15:44:03,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:03,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 4587 transitions. [2021-12-14 15:44:03,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 15:44:03,017 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:03,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:03,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 15:44:03,017 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:03,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:03,018 INFO L85 PathProgramCache]: Analyzing trace with hash -389078092, now seen corresponding path program 1 times [2021-12-14 15:44:03,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:03,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209485602] [2021-12-14 15:44:03,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:03,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:44:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 15:44:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:44:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:44:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:44:03,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:03,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209485602] [2021-12-14 15:44:03,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209485602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:03,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:44:03,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:44:03,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80585936] [2021-12-14 15:44:03,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:03,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:44:03,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:03,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:44:03,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:44:03,130 INFO L87 Difference]: Start difference. First operand 2529 states and 4587 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:03,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:03,708 INFO L93 Difference]: Finished difference Result 3061 states and 5432 transitions. [2021-12-14 15:44:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:44:03,708 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-14 15:44:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:03,717 INFO L225 Difference]: With dead ends: 3061 [2021-12-14 15:44:03,717 INFO L226 Difference]: Without dead ends: 2666 [2021-12-14 15:44:03,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:44:03,720 INFO L933 BasicCegarLoop]: 4285 mSDtfsCounter, 4601 mSDsluCounter, 12283 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4614 SdHoareTripleChecker+Valid, 16568 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 15:44:03,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4614 Valid, 16568 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 15:44:03,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-12-14 15:44:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2529. [2021-12-14 15:44:03,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 2479 states have (on average 1.8208955223880596) internal successors, (4514), 2483 states have internal predecessors, (4514), 35 states have call successors, (35), 13 states have call predecessors, (35), 13 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-14 15:44:03,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 4585 transitions. [2021-12-14 15:44:03,772 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 4585 transitions. Word has length 102 [2021-12-14 15:44:03,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:03,772 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 4585 transitions. [2021-12-14 15:44:03,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:03,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 4585 transitions. [2021-12-14 15:44:03,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 15:44:03,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:03,774 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:03,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 15:44:03,774 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:03,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:03,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1487404726, now seen corresponding path program 1 times [2021-12-14 15:44:03,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:03,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941055391] [2021-12-14 15:44:03,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:03,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:03,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:44:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 15:44:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:44:03,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:44:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:44:03,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:03,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941055391] [2021-12-14 15:44:03,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941055391] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:03,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:44:03,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:44:03,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925599109] [2021-12-14 15:44:03,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:03,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:44:03,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:03,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:44:03,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:44:03,899 INFO L87 Difference]: Start difference. First operand 2529 states and 4585 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:05,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:05,231 INFO L93 Difference]: Finished difference Result 3321 states and 5829 transitions. [2021-12-14 15:44:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:44:05,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-14 15:44:05,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:05,241 INFO L225 Difference]: With dead ends: 3321 [2021-12-14 15:44:05,241 INFO L226 Difference]: Without dead ends: 2926 [2021-12-14 15:44:05,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 15:44:05,243 INFO L933 BasicCegarLoop]: 4475 mSDtfsCounter, 4718 mSDsluCounter, 16937 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4730 SdHoareTripleChecker+Valid, 21412 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:44:05,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4730 Valid, 21412 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 15:44:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-12-14 15:44:05,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2716. [2021-12-14 15:44:05,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2716 states, 2645 states have (on average 1.8026465028355387) internal successors, (4768), 2650 states have internal predecessors, (4768), 49 states have call successors, (49), 19 states have call predecessors, (49), 20 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-14 15:44:05,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 4869 transitions. [2021-12-14 15:44:05,296 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 4869 transitions. Word has length 102 [2021-12-14 15:44:05,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:05,297 INFO L470 AbstractCegarLoop]: Abstraction has 2716 states and 4869 transitions. [2021-12-14 15:44:05,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:05,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 4869 transitions. [2021-12-14 15:44:05,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 15:44:05,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:05,298 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:05,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 15:44:05,299 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:05,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:05,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1482706376, now seen corresponding path program 1 times [2021-12-14 15:44:05,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:05,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896167895] [2021-12-14 15:44:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:05,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:05,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:05,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:44:05,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:05,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 15:44:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:05,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:44:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:05,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:44:05,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:44:05,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:05,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896167895] [2021-12-14 15:44:05,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896167895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:05,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:44:05,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:44:05,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811001106] [2021-12-14 15:44:05,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:05,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:44:05,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:05,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:44:05,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:44:05,385 INFO L87 Difference]: Start difference. First operand 2716 states and 4869 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:06,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:06,549 INFO L93 Difference]: Finished difference Result 4006 states and 6889 transitions. [2021-12-14 15:44:06,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 15:44:06,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-14 15:44:06,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:06,561 INFO L225 Difference]: With dead ends: 4006 [2021-12-14 15:44:06,561 INFO L226 Difference]: Without dead ends: 3424 [2021-12-14 15:44:06,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 15:44:06,564 INFO L933 BasicCegarLoop]: 4468 mSDtfsCounter, 4714 mSDsluCounter, 16933 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4726 SdHoareTripleChecker+Valid, 21401 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 15:44:06,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4726 Valid, 21401 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 15:44:06,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3424 states. [2021-12-14 15:44:06,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3424 to 3093. [2021-12-14 15:44:06,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 2980 states have (on average 1.7721476510067113) internal successors, (5281), 2987 states have internal predecessors, (5281), 77 states have call successors, (77), 31 states have call predecessors, (77), 34 states have return successors, (88), 78 states have call predecessors, (88), 75 states have call successors, (88) [2021-12-14 15:44:06,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 5446 transitions. [2021-12-14 15:44:06,627 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 5446 transitions. Word has length 102 [2021-12-14 15:44:06,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:06,627 INFO L470 AbstractCegarLoop]: Abstraction has 3093 states and 5446 transitions. [2021-12-14 15:44:06,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:06,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 5446 transitions. [2021-12-14 15:44:06,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 15:44:06,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:06,629 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:06,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 15:44:06,629 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:06,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:06,630 INFO L85 PathProgramCache]: Analyzing trace with hash 84051574, now seen corresponding path program 1 times [2021-12-14 15:44:06,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:06,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123234558] [2021-12-14 15:44:06,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:06,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:06,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:06,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:06,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:44:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:06,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 15:44:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:06,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:44:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:06,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:44:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:44:06,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:06,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123234558] [2021-12-14 15:44:06,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123234558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:06,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:44:06,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:44:06,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829437043] [2021-12-14 15:44:06,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:06,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:44:06,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:06,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:44:06,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:44:06,708 INFO L87 Difference]: Start difference. First operand 3093 states and 5446 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:07,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:07,323 INFO L93 Difference]: Finished difference Result 4371 states and 7455 transitions. [2021-12-14 15:44:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:44:07,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-14 15:44:07,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:07,335 INFO L225 Difference]: With dead ends: 4371 [2021-12-14 15:44:07,335 INFO L226 Difference]: Without dead ends: 3412 [2021-12-14 15:44:07,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:44:07,338 INFO L933 BasicCegarLoop]: 4272 mSDtfsCounter, 4598 mSDsluCounter, 12282 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4611 SdHoareTripleChecker+Valid, 16554 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 15:44:07,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4611 Valid, 16554 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 15:44:07,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2021-12-14 15:44:07,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 3093. [2021-12-14 15:44:07,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3093 states, 2980 states have (on average 1.770469798657718) internal successors, (5276), 2987 states have internal predecessors, (5276), 77 states have call successors, (77), 31 states have call predecessors, (77), 34 states have return successors, (88), 78 states have call predecessors, (88), 75 states have call successors, (88) [2021-12-14 15:44:07,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 5441 transitions. [2021-12-14 15:44:07,415 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 5441 transitions. Word has length 102 [2021-12-14 15:44:07,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:07,415 INFO L470 AbstractCegarLoop]: Abstraction has 3093 states and 5441 transitions. [2021-12-14 15:44:07,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 5441 transitions. [2021-12-14 15:44:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 15:44:07,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:07,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:07,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 15:44:07,417 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:07,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:07,418 INFO L85 PathProgramCache]: Analyzing trace with hash -973786504, now seen corresponding path program 1 times [2021-12-14 15:44:07,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:07,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041507710] [2021-12-14 15:44:07,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:07,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:07,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:07,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:44:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:07,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 15:44:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:07,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:44:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:07,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:44:07,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:44:07,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:07,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041507710] [2021-12-14 15:44:07,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041507710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:07,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:44:07,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:44:07,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803174630] [2021-12-14 15:44:07,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:07,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:44:07,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:07,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:44:07,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:44:07,486 INFO L87 Difference]: Start difference. First operand 3093 states and 5441 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:08,617 INFO L93 Difference]: Finished difference Result 5649 states and 9388 transitions. [2021-12-14 15:44:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:44:08,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-14 15:44:08,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:08,646 INFO L225 Difference]: With dead ends: 5649 [2021-12-14 15:44:08,647 INFO L226 Difference]: Without dead ends: 4690 [2021-12-14 15:44:08,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:44:08,653 INFO L933 BasicCegarLoop]: 4322 mSDtfsCounter, 4966 mSDsluCounter, 16559 mSDsCounter, 0 mSdLazyCounter, 1280 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4984 SdHoareTripleChecker+Valid, 20881 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 15:44:08,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4984 Valid, 20881 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1280 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 15:44:08,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4690 states. [2021-12-14 15:44:08,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4690 to 3843. [2021-12-14 15:44:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3843 states, 3650 states have (on average 1.726027397260274) internal successors, (6300), 3661 states have internal predecessors, (6300), 129 states have call successors, (129), 55 states have call predecessors, (129), 62 states have return successors, (162), 134 states have call predecessors, (162), 127 states have call successors, (162) [2021-12-14 15:44:08,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3843 states to 3843 states and 6591 transitions. [2021-12-14 15:44:08,765 INFO L78 Accepts]: Start accepts. Automaton has 3843 states and 6591 transitions. Word has length 102 [2021-12-14 15:44:08,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:08,765 INFO L470 AbstractCegarLoop]: Abstraction has 3843 states and 6591 transitions. [2021-12-14 15:44:08,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:08,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3843 states and 6591 transitions. [2021-12-14 15:44:08,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 15:44:08,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:08,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:08,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 15:44:08,768 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:08,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:08,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2116288970, now seen corresponding path program 1 times [2021-12-14 15:44:08,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:08,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660281437] [2021-12-14 15:44:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:08,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:08,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:08,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:44:08,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:08,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 15:44:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:08,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:44:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:08,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:44:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:44:08,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:08,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660281437] [2021-12-14 15:44:08,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660281437] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:08,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:44:08,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:44:08,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444917717] [2021-12-14 15:44:08,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:08,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:44:08,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:08,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:44:08,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:44:08,843 INFO L87 Difference]: Start difference. First operand 3843 states and 6591 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:10,212 INFO L93 Difference]: Finished difference Result 8501 states and 13780 transitions. [2021-12-14 15:44:10,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:44:10,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-14 15:44:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:10,238 INFO L225 Difference]: With dead ends: 8501 [2021-12-14 15:44:10,238 INFO L226 Difference]: Without dead ends: 6792 [2021-12-14 15:44:10,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:44:10,247 INFO L933 BasicCegarLoop]: 4525 mSDtfsCounter, 4747 mSDsluCounter, 16922 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4758 SdHoareTripleChecker+Valid, 21447 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:44:10,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4758 Valid, 21447 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 15:44:10,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6792 states. [2021-12-14 15:44:10,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6792 to 5256. [2021-12-14 15:44:10,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5256 states, 4907 states have (on average 1.6714897085795801) internal successors, (8202), 4926 states have internal predecessors, (8202), 229 states have call successors, (229), 103 states have call predecessors, (229), 118 states have return successors, (324), 242 states have call predecessors, (324), 227 states have call successors, (324) [2021-12-14 15:44:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5256 states to 5256 states and 8755 transitions. [2021-12-14 15:44:10,463 INFO L78 Accepts]: Start accepts. Automaton has 5256 states and 8755 transitions. Word has length 102 [2021-12-14 15:44:10,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:10,464 INFO L470 AbstractCegarLoop]: Abstraction has 5256 states and 8755 transitions. [2021-12-14 15:44:10,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:10,464 INFO L276 IsEmpty]: Start isEmpty. Operand 5256 states and 8755 transitions. [2021-12-14 15:44:10,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 15:44:10,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:10,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:10,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 15:44:10,468 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:10,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:10,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1876049224, now seen corresponding path program 1 times [2021-12-14 15:44:10,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:10,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750309674] [2021-12-14 15:44:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:10,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:10,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:44:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 15:44:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:44:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:44:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:44:10,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:10,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750309674] [2021-12-14 15:44:10,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750309674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:10,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:44:10,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:44:10,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377315948] [2021-12-14 15:44:10,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:10,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:44:10,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:10,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:44:10,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:44:10,549 INFO L87 Difference]: Start difference. First operand 5256 states and 8755 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:11,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:11,993 INFO L93 Difference]: Finished difference Result 13816 states and 21958 transitions. [2021-12-14 15:44:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:44:11,994 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-14 15:44:11,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:12,021 INFO L225 Difference]: With dead ends: 13816 [2021-12-14 15:44:12,021 INFO L226 Difference]: Without dead ends: 10694 [2021-12-14 15:44:12,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:44:12,038 INFO L933 BasicCegarLoop]: 4445 mSDtfsCounter, 4839 mSDsluCounter, 16925 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4857 SdHoareTripleChecker+Valid, 21370 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 15:44:12,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4857 Valid, 21370 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 15:44:12,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10694 states. [2021-12-14 15:44:12,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10694 to 8153. [2021-12-14 15:44:12,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8153 states, 7500 states have (on average 1.6208) internal successors, (12156), 7535 states have internal predecessors, (12156), 421 states have call successors, (421), 199 states have call predecessors, (421), 230 states have return successors, (694), 450 states have call predecessors, (694), 419 states have call successors, (694) [2021-12-14 15:44:12,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8153 states to 8153 states and 13271 transitions. [2021-12-14 15:44:12,309 INFO L78 Accepts]: Start accepts. Automaton has 8153 states and 13271 transitions. Word has length 102 [2021-12-14 15:44:12,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:12,309 INFO L470 AbstractCegarLoop]: Abstraction has 8153 states and 13271 transitions. [2021-12-14 15:44:12,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:12,310 INFO L276 IsEmpty]: Start isEmpty. Operand 8153 states and 13271 transitions. [2021-12-14 15:44:12,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 15:44:12,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:12,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:12,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 15:44:12,314 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:12,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:12,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1037015562, now seen corresponding path program 1 times [2021-12-14 15:44:12,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:12,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133543358] [2021-12-14 15:44:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:12,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:12,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:12,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:44:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:12,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 15:44:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:12,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:44:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:12,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:44:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:44:12,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:12,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133543358] [2021-12-14 15:44:12,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133543358] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:12,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:44:12,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:44:12,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336617256] [2021-12-14 15:44:12,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:12,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:44:12,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:12,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:44:12,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:44:12,390 INFO L87 Difference]: Start difference. First operand 8153 states and 13271 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:14,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:14,002 INFO L93 Difference]: Finished difference Result 24375 states and 38476 transitions. [2021-12-14 15:44:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 15:44:14,003 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-14 15:44:14,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:14,125 INFO L225 Difference]: With dead ends: 24375 [2021-12-14 15:44:14,137 INFO L226 Difference]: Without dead ends: 18356 [2021-12-14 15:44:14,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 15:44:14,177 INFO L933 BasicCegarLoop]: 4438 mSDtfsCounter, 4802 mSDsluCounter, 16925 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4820 SdHoareTripleChecker+Valid, 21363 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 15:44:14,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4820 Valid, 21363 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 15:44:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18356 states. [2021-12-14 15:44:14,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18356 to 13930. [2021-12-14 15:44:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13930 states, 12685 states have (on average 1.5828143476547103) internal successors, (20078), 12752 states have internal predecessors, (20078), 789 states have call successors, (789), 391 states have call predecessors, (789), 454 states have return successors, (1580), 850 states have call predecessors, (1580), 787 states have call successors, (1580) [2021-12-14 15:44:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13930 states to 13930 states and 22447 transitions. [2021-12-14 15:44:14,759 INFO L78 Accepts]: Start accepts. Automaton has 13930 states and 22447 transitions. Word has length 102 [2021-12-14 15:44:14,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:14,759 INFO L470 AbstractCegarLoop]: Abstraction has 13930 states and 22447 transitions. [2021-12-14 15:44:14,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:14,759 INFO L276 IsEmpty]: Start isEmpty. Operand 13930 states and 22447 transitions. [2021-12-14 15:44:14,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 15:44:14,767 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:14,767 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:14,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 15:44:14,767 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1009949960, now seen corresponding path program 1 times [2021-12-14 15:44:14,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:14,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669795] [2021-12-14 15:44:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:14,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:14,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:14,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:44:14,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:14,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 15:44:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:14,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:44:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:14,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:44:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:44:14,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:14,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669795] [2021-12-14 15:44:14,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:14,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:44:14,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 15:44:14,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190000953] [2021-12-14 15:44:14,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:14,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 15:44:14,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:14,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 15:44:14,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 15:44:14,831 INFO L87 Difference]: Start difference. First operand 13930 states and 22447 transitions. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:15,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:15,859 INFO L93 Difference]: Finished difference Result 28753 states and 46200 transitions. [2021-12-14 15:44:15,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 15:44:15,860 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-14 15:44:15,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:15,905 INFO L225 Difference]: With dead ends: 28753 [2021-12-14 15:44:15,905 INFO L226 Difference]: Without dead ends: 16957 [2021-12-14 15:44:15,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-14 15:44:15,938 INFO L933 BasicCegarLoop]: 4253 mSDtfsCounter, 4516 mSDsluCounter, 16350 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4529 SdHoareTripleChecker+Valid, 20603 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 15:44:15,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4529 Valid, 20603 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-14 15:44:15,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16957 states. [2021-12-14 15:44:16,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16957 to 13930. [2021-12-14 15:44:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13930 states, 12685 states have (on average 1.577690185258179) internal successors, (20013), 12752 states have internal predecessors, (20013), 789 states have call successors, (789), 391 states have call predecessors, (789), 454 states have return successors, (1580), 850 states have call predecessors, (1580), 787 states have call successors, (1580) [2021-12-14 15:44:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13930 states to 13930 states and 22382 transitions. [2021-12-14 15:44:16,693 INFO L78 Accepts]: Start accepts. Automaton has 13930 states and 22382 transitions. Word has length 102 [2021-12-14 15:44:16,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:16,694 INFO L470 AbstractCegarLoop]: Abstraction has 13930 states and 22382 transitions. [2021-12-14 15:44:16,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 5 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:16,694 INFO L276 IsEmpty]: Start isEmpty. Operand 13930 states and 22382 transitions. [2021-12-14 15:44:16,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-12-14 15:44:16,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:16,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 15:44:16,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 15:44:16,703 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:16,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:16,703 INFO L85 PathProgramCache]: Analyzing trace with hash 724154490, now seen corresponding path program 1 times [2021-12-14 15:44:16,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:16,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472118930] [2021-12-14 15:44:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:16,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:16,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:16,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:44:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:16,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 15:44:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:16,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:44:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:16,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:44:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 15:44:16,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:16,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472118930] [2021-12-14 15:44:16,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472118930] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:16,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 15:44:16,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 15:44:16,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212326076] [2021-12-14 15:44:16,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:16,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 15:44:16,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:16,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 15:44:16,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 15:44:16,760 INFO L87 Difference]: Start difference. First operand 13930 states and 22382 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:18,495 INFO L93 Difference]: Finished difference Result 35984 states and 56644 transitions. [2021-12-14 15:44:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 15:44:18,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 102 [2021-12-14 15:44:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:18,560 INFO L225 Difference]: With dead ends: 35984 [2021-12-14 15:44:18,560 INFO L226 Difference]: Without dead ends: 24189 [2021-12-14 15:44:18,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-14 15:44:18,602 INFO L933 BasicCegarLoop]: 4565 mSDtfsCounter, 4925 mSDsluCounter, 12545 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4957 SdHoareTripleChecker+Valid, 17110 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 15:44:18,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4957 Valid, 17110 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 15:44:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24189 states. [2021-12-14 15:44:19,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24189 to 19766. [2021-12-14 15:44:19,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19766 states, 17876 states have (on average 1.5501230700380397) internal successors, (27710), 18008 states have internal predecessors, (27710), 1204 states have call successors, (1204), 589 states have call predecessors, (1204), 684 states have return successors, (2239), 1232 states have call predecessors, (2239), 1202 states have call successors, (2239) [2021-12-14 15:44:19,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19766 states to 19766 states and 31153 transitions. [2021-12-14 15:44:19,296 INFO L78 Accepts]: Start accepts. Automaton has 19766 states and 31153 transitions. Word has length 102 [2021-12-14 15:44:19,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:19,297 INFO L470 AbstractCegarLoop]: Abstraction has 19766 states and 31153 transitions. [2021-12-14 15:44:19,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 15:44:19,297 INFO L276 IsEmpty]: Start isEmpty. Operand 19766 states and 31153 transitions. [2021-12-14 15:44:19,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-14 15:44:19,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:19,331 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 15:44:19,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 15:44:19,331 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:19,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:19,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1880616710, now seen corresponding path program 1 times [2021-12-14 15:44:19,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:19,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284819607] [2021-12-14 15:44:19,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:19,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:19,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:19,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:44:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:19,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 15:44:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:19,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:44:19,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:19,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:44:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:19,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 15:44:19,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:19,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:44:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:19,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-14 15:44:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 15:44:19,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:19,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284819607] [2021-12-14 15:44:19,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284819607] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:44:19,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397145778] [2021-12-14 15:44:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:19,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:44:19,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:44:19,543 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) [2021-12-14 15:44:19,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 15:44:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:19,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:44:19,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:44:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 15:44:19,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:44:19,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397145778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:19,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:44:19,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 15:44:19,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674196518] [2021-12-14 15:44:19,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:19,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:44:19,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:19,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:44:19,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:19,920 INFO L87 Difference]: Start difference. First operand 19766 states and 31153 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 15:44:21,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:21,048 INFO L93 Difference]: Finished difference Result 54681 states and 85501 transitions. [2021-12-14 15:44:21,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:44:21,049 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 165 [2021-12-14 15:44:21,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:21,194 INFO L225 Difference]: With dead ends: 54681 [2021-12-14 15:44:21,206 INFO L226 Difference]: Without dead ends: 37050 [2021-12-14 15:44:21,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:21,257 INFO L933 BasicCegarLoop]: 4328 mSDtfsCounter, 4202 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4202 SdHoareTripleChecker+Valid, 4613 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:44:21,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4202 Valid, 4613 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:44:21,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37050 states. [2021-12-14 15:44:22,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37050 to 36850. [2021-12-14 15:44:22,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36850 states, 33128 states have (on average 1.5291898092248248) internal successors, (50659), 33389 states have internal predecessors, (50659), 2352 states have call successors, (2352), 1177 states have call predecessors, (2352), 1368 states have return successors, (4361), 2347 states have call predecessors, (4361), 2350 states have call successors, (4361) [2021-12-14 15:44:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36850 states to 36850 states and 57372 transitions. [2021-12-14 15:44:22,860 INFO L78 Accepts]: Start accepts. Automaton has 36850 states and 57372 transitions. Word has length 165 [2021-12-14 15:44:22,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:22,860 INFO L470 AbstractCegarLoop]: Abstraction has 36850 states and 57372 transitions. [2021-12-14 15:44:22,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 15:44:22,860 INFO L276 IsEmpty]: Start isEmpty. Operand 36850 states and 57372 transitions. [2021-12-14 15:44:22,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-14 15:44:22,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:22,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 15:44:22,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 15:44:23,131 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,SelfDestructingSolverStorable12 [2021-12-14 15:44:23,131 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:23,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:23,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1353738266, now seen corresponding path program 1 times [2021-12-14 15:44:23,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:23,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377070799] [2021-12-14 15:44:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:23,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:23,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:23,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:44:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:23,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 15:44:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:23,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:44:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:23,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:44:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:23,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 15:44:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:23,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:44:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:23,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-14 15:44:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 15:44:23,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:23,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377070799] [2021-12-14 15:44:23,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377070799] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:44:23,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106601251] [2021-12-14 15:44:23,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:23,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:44:23,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:44:23,256 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) [2021-12-14 15:44:23,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 15:44:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:23,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:44:23,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:44:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-14 15:44:23,595 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:44:23,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106601251] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:23,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:44:23,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 15:44:23,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817102538] [2021-12-14 15:44:23,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:23,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:44:23,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:23,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:44:23,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:23,598 INFO L87 Difference]: Start difference. First operand 36850 states and 57372 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 15:44:26,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:26,327 INFO L93 Difference]: Finished difference Result 105587 states and 164174 transitions. [2021-12-14 15:44:26,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:44:26,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 165 [2021-12-14 15:44:26,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:26,647 INFO L225 Difference]: With dead ends: 105587 [2021-12-14 15:44:26,648 INFO L226 Difference]: Without dead ends: 70872 [2021-12-14 15:44:26,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:26,737 INFO L933 BasicCegarLoop]: 4284 mSDtfsCounter, 4220 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4220 SdHoareTripleChecker+Valid, 4569 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:44:26,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4220 Valid, 4569 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:44:26,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70872 states. [2021-12-14 15:44:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70872 to 70476. [2021-12-14 15:44:29,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70476 states, 63140 states have (on average 1.5168039277795375) internal successors, (95771), 63659 states have internal predecessors, (95771), 4598 states have call successors, (4598), 2353 states have call predecessors, (4598), 2736 states have return successors, (8555), 4527 states have call predecessors, (8555), 4596 states have call successors, (8555) [2021-12-14 15:44:29,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70476 states to 70476 states and 108924 transitions. [2021-12-14 15:44:29,701 INFO L78 Accepts]: Start accepts. Automaton has 70476 states and 108924 transitions. Word has length 165 [2021-12-14 15:44:29,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:29,702 INFO L470 AbstractCegarLoop]: Abstraction has 70476 states and 108924 transitions. [2021-12-14 15:44:29,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 15:44:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 70476 states and 108924 transitions. [2021-12-14 15:44:29,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-14 15:44:29,806 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:29,807 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 15:44:29,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-14 15:44:30,024 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,SelfDestructingSolverStorable13 [2021-12-14 15:44:30,024 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:30,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:30,025 INFO L85 PathProgramCache]: Analyzing trace with hash 201144122, now seen corresponding path program 1 times [2021-12-14 15:44:30,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:30,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409822757] [2021-12-14 15:44:30,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:30,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:30,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:30,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:44:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:30,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 15:44:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:30,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:44:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:30,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:44:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:30,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 15:44:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:30,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:44:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:30,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-14 15:44:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 15:44:30,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:30,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409822757] [2021-12-14 15:44:30,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409822757] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:44:30,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993073671] [2021-12-14 15:44:30,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:30,113 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:44:30,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:44:30,114 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) [2021-12-14 15:44:30,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 15:44:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:30,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:44:30,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:44:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 15:44:30,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:44:30,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993073671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:30,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:44:30,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-14 15:44:30,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57915521] [2021-12-14 15:44:30,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:30,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:44:30,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:30,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:44:30,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:30,458 INFO L87 Difference]: Start difference. First operand 70476 states and 108924 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 15:44:36,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 15:44:36,046 INFO L93 Difference]: Finished difference Result 205197 states and 317852 transitions. [2021-12-14 15:44:36,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 15:44:36,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 165 [2021-12-14 15:44:36,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 15:44:36,614 INFO L225 Difference]: With dead ends: 205197 [2021-12-14 15:44:36,615 INFO L226 Difference]: Without dead ends: 136856 [2021-12-14 15:44:36,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:36,770 INFO L933 BasicCegarLoop]: 4328 mSDtfsCounter, 4214 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4214 SdHoareTripleChecker+Valid, 4613 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 15:44:36,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4214 Valid, 4613 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 15:44:36,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136856 states. [2021-12-14 15:44:42,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136856 to 136068. [2021-12-14 15:44:42,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136068 states, 121796 states have (on average 1.5110430556011691) internal successors, (184039), 122831 states have internal predecessors, (184039), 8798 states have call successors, (8798), 4705 states have call predecessors, (8798), 5472 states have return successors, (16651), 8595 states have call predecessors, (16651), 8796 states have call successors, (16651) [2021-12-14 15:44:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136068 states to 136068 states and 209488 transitions. [2021-12-14 15:44:43,194 INFO L78 Accepts]: Start accepts. Automaton has 136068 states and 209488 transitions. Word has length 165 [2021-12-14 15:44:43,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 15:44:43,195 INFO L470 AbstractCegarLoop]: Abstraction has 136068 states and 209488 transitions. [2021-12-14 15:44:43,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 2 states have internal predecessors, (122), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-14 15:44:43,196 INFO L276 IsEmpty]: Start isEmpty. Operand 136068 states and 209488 transitions. [2021-12-14 15:44:43,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-14 15:44:43,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 15:44:43,374 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-14 15:44:43,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 15:44:43,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:44:43,590 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 15:44:43,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 15:44:43,591 INFO L85 PathProgramCache]: Analyzing trace with hash 945544794, now seen corresponding path program 1 times [2021-12-14 15:44:43,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 15:44:43,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381747817] [2021-12-14 15:44:43,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:43,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 15:44:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:43,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 15:44:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:43,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-14 15:44:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:43,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-14 15:44:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:43,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-14 15:44:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:43,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-14 15:44:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:43,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 15:44:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:43,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-14 15:44:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:43,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-14 15:44:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-14 15:44:43,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 15:44:43,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381747817] [2021-12-14 15:44:43,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381747817] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 15:44:43,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587686233] [2021-12-14 15:44:43,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 15:44:43,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 15:44:43,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 15:44:43,698 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) [2021-12-14 15:44:43,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 15:44:43,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 15:44:43,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 15:44:43,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 15:44:43,991 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-14 15:44:43,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 15:44:43,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587686233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 15:44:43,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 15:44:43,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 15:44:43,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616721496] [2021-12-14 15:44:43,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 15:44:43,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 15:44:43,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 15:44:43,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 15:44:43,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-14 15:44:43,993 INFO L87 Difference]: Start difference. First operand 136068 states and 209488 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8)